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Letteratura scientifica selezionata sul tema "Grasslands – Research"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 6 febbraio 2022

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Articoli di riviste sul tema "Grasslands – Research"

1

Su, Chen Xia, Yuan Ting Mi, Duo Wang, Qing Shan Zhao, Jun Jie Duan e Bao Ling Mei. "Research Progress on Exchanging Fluxes of Greenhouse Gases from Artificial Grassland". Advanced Materials Research 726-731 (agosto 2013): 4131–34. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.4131.

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At present, in order to improve the yield of grasslands, artificial grasslands are largely constructed, which has a great significance to improve the ecological environment. The researches on greenhouse gases (Carbon Dioxide, Methane and Nitrous Oxide) fluxes of artificial grassland are lacking and the exchange of fluxes has a great impact on global greenhouse gases balance. We summarize the researching progress on greenhouse gases exchanging fluxes from artificial grassland, and we analyze the similarities and differences of greenhouse gases exchanging fluxes between artificial grasslands and natural grasslands by the way of comparisons.

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2

Nerlekar, Ashish N., e Joseph W. Veldman. "High plant diversity and slow assembly of old-growth grasslands". Proceedings of the National Academy of Sciences 117, n. 31 (16 luglio 2020): 18550–56. http://dx.doi.org/10.1073/pnas.1922266117.

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Abstract (sommario):

Earth’s ancient grasslands and savannas—hereafter old-growth grasslands—have long been viewed by scientists and environmental policymakers as early successional plant communities of low conservation value. Challenging this view, emerging research suggests that old-growth grasslands support substantial biodiversity and are slow to recover if destroyed by human land uses (e.g., tillage agriculture, plantation forestry). But despite growing interest in grassland conservation, there has been no global test of whether old-growth grasslands support greater plant species diversity than secondary grasslands (i.e., herbaceous communities that assemble after destruction of old-growth grasslands). Our synthesis of 31 studies, including 92 timepoints on six continents, found that secondary grasslands supported 37% fewer plant species than old-growth grasslands (log response ratio = −0.46) and that secondary grasslands typically require at least a century, and more often millennia (projected mean 1,400 y), to recover their former richness. Young (<29 y) secondary grasslands were composed of weedy species, and even as their richness increased over decades to centuries, secondary grasslands were still missing characteristic old-growth grassland species (e.g., long-lived perennials). In light of these results, the view that all grasslands are weedy communities, trapped by fire and large herbivores in a state of arrested succession, is untenable. Moving forward, we suggest that ecologists should explicitly consider grassland assembly time and endogenous disturbance regimes in studies of plant community structure and function. We encourage environmental policymakers to prioritize old-growth grassland conservation and work to elevate the status of old-growth grasslands, alongside old-growth forests, in the public consciousness.

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3

Reinermann, Sophie, Sarah Asam e Claudia Kuenzer. "Remote Sensing of Grassland Production and Management—A Review". Remote Sensing 12, n. 12 (17 giugno 2020): 1949. http://dx.doi.org/10.3390/rs12121949.

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Grasslands cover one third of the earth’s terrestrial surface and are mainly used for livestock production. The usage type, use intensity and condition of grasslands are often unclear. Remote sensing enables the analysis of grassland production and management on large spatial scales and with high temporal resolution. Despite growing numbers of studies in the field, remote sensing applications in grassland biomes are underrepresented in literature and less streamlined compared to other vegetation types. By reviewing articles within research on satellite-based remote sensing of grassland production traits and management, we describe and evaluate methods and results and reveal spatial and temporal patterns of existing work. In addition, we highlight research gaps and suggest research opportunities. The focus is on managed grasslands and pastures and special emphasize is given to the assessment of studies on grazing intensity and mowing detection based on earth observation data. Grazing and mowing highly influence the production and ecology of grassland and are major grassland management types. In total, 253 research articles were reviewed. The majority of these studies focused on grassland production traits and only 80 articles were about grassland management and use intensity. While the remote sensing-based analysis of grassland production heavily relied on empirical relationships between ground-truth and satellite data or radiation transfer models, the used methods to detect and investigate grassland management differed. In addition, this review identified that studies on grassland production traits with satellite data often lacked including spatial management information into the analyses. Studies focusing on grassland management and use intensity mostly investigated rather small study areas with homogeneous intensity levels among the grassland parcels. Combining grassland production estimations with management information, while accounting for the variability among grasslands, is recommended to facilitate the development of large-scale continuous monitoring and remote sensing grassland products, which have been rare thus far.

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4

HELDEN, ALVIN J., GEOFFREY J. MORLEY, GABRIELLE L. DAVIDSON e EDGAR C. TURNER. "What can WE do for urban insect biodiversity? Applying lessons from ecological research". Zoosymposia 12, n. 1 (25 marzo 2018): 51–63. http://dx.doi.org/10.11646/zoosymposia.12.1.6.

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Abstract (sommario):

Urban ecosystems are not unique, as the ecological processes and anthropological effects they encapsulate can equally be found in a range of human dominated environments. Applying ecological lessons from both within and outside urban areas is important for insect conservation within our expanding towns and cities. The management of urban grasslands, which in many cases is controlled by private individual and corporate landowners, has the potential to make a large difference to the biodiversity they support. Here we report on an investigation of invertebrate biodiversity within a series of small urban grasslands with contrasting frequency of management by mowing. Seven gardens and five other grassland areas were suction sampled for grassland invertebrates in July 2016. Samples were taken in patches that were regularly cut on a 7-14 day cycle (very short), those cut every six weeks (short) and those than had not been cut since the previous year (long). Invertebrates were mostly identified to order level, with the Hemiptera to species or morphospecies. Invertebrate abundance was significantly inversely related to mowing frequency but overall species richness did not differ between short and very short grasslands. Community structure also was most distinct in the long grasslands. The pattern of abundance varied between different taxonomic groups, with the Hemiptera particularly benefiting from very low levels of management. The value to invertebrates, especially Hemiptera, of reduced grassland management is discussed, with reference to how the owners of gardens and other urban grassy areas can make simple changes to benefit biodiversity on their land

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5

Kang, Le, Xingguo Han, Zhibin Zhang e Osbert Jianxin Sun. "Grassland ecosystems in China: review of current knowledge and research advancement". Philosophical Transactions of the Royal Society B: Biological Sciences 362, n. 1482 (22 febbraio 2007): 997–1008. http://dx.doi.org/10.1098/rstb.2007.2029.

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Abstract (sommario):

Grasslands are the dominant landscape in China, accounting for 40% of the national land area. Research concerning China's grassland ecosystems can be chronologically summarized into four periods: (i) pre-1950s, preliminary research and survey of grassland vegetation and plant species by Russians, Japanese and Western Europeans, (ii) 1950–1975, exploration and survey of vegetation, soils and topography as part of natural resource inventory programmes by regional and national institutions mainly led by the Chinese Academy of Sciences, (iii) 1976–1995, establishment of field stations for long-term ecological monitoring and studies of ecosystem processes, (iv) 1996–present, comprehensive studies of community dynamics and ecosystem function integrating multi-scale and multidisciplinary approaches and experimental manipulations. Major findings of scientific significance in China's grassland ecosystem research include: (i) improved knowledge on succession and biogeochemistry of the semi-arid and temperate grassland ecosystems, (ii) elucidation of life-history strategies and diapause characteristics of the native grasshopper species as one of the key grassland pests, and (iii) development of effective management strategies for controlling rodent pests in grassland ecosystems. Opportunities exist for using the natural grasslands in northern China as a model system to test ecosystem theories that so far have proven a challenge to ecologists worldwide.

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6

Zhang, Fan Fan, Lei Yu, Chun Hui Ma e Wei Hua Lu. "Research on Natural Mowing Steppe Resources Based on AHP in Shaertao Mountain, ZHAOSU Xinjiang". Advanced Materials Research 998-999 (luglio 2014): 1439–43. http://dx.doi.org/10.4028/www.scientific.net/amr.998-999.1439.

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Natural grass field is an important part of natural grasslands. This paper sets Xinjiang ZHAOSU County Shaertao Mountain natural grass field as an example, treats the eight factors index that can reflect the nature and economic characteristics of grassland resources of natural grass field as a basis, and gives the case of comprehensive evaluation on grassland resources of natural grass field by the AHP to provide a reference for other researchers.

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7

Chang, X. F., X. X. Zhu, S. P. Wang, S. J. Cui, C. Y. Luo, Z. H. Zhang e A. Wilkes. "Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau". Biogeosciences 11, n. 13 (3 luglio 2014): 3495–503. http://dx.doi.org/10.5194/bg-11-3495-2014.

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Abstract. Grassland soil organic carbon (SOC) is sensitive to anthropogenic activities. Increased anthropogenic disturbance related to overgrazing has led to widespread alpine grassland degradation on the Tibetan Plateau. The degraded grasslands are considered to have great potential for carbon sequestration after adoption of improved management practices. Here, we calibrated and employed the Century model to investigate the effects of overgrazing and improved managements on the SOC dynamics in alpine meadows. We calibrated the Century model against plant productivity at the Haibei Research Station. SOC stocks for validation were obtained in 2009–2010 from degraded alpine meadows in two communes. We found that Century model can successfully capture grassland SOC changes. Overall, our simulation suggests that degraded alpine meadow SOC significantly increased with the advent of restoration management from 2011 to 2030. Carbon sequestration rates ranged between 0.04 Mg C ha−1 yr−1 in lightly degraded winter grazing grasslands and 2.0 Mg C ha−1 yr−1 in moderately degraded summer grazing grasslands. Our modelling work also predicts that improve management in degraded Tibetan grasslands will contribute to an annual carbon sink of 0.022–0.059 Pg C yr−1. These results imply that restoration of degraded grasslands in the Tibetan Plateau has great potential for soil carbon sequestration to mitigate greenhouse gases.

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8

Chang, X. F., S. P. Wang, X. X. Zhu, S. J. Cui, C. Y. Luo, Z. H. Zhang e A. Wilkes. "Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau". Biogeosciences Discussions 11, n. 1 (8 gennaio 2014): 417–40. http://dx.doi.org/10.5194/bgd-11-417-2014.

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Abstract (sommario):

Abstract. Grassland soil organic carbon (SOC) is sensitive to anthropogenic activities. Increased anthropogenic disturbance related to overgrazing has led to widespread alpine grassland degradation on the Tibetan Plateau. The degraded grasslands are considered to have great potential for carbon sequestration after adoption of improved management practices. Here, we calibrated and employed the Century model to investigate the effects of overgrazing and improved managements on the SOC dynamics in alpine meadows. We calibrated Century model against plant productivity at Haibei Research Station. SOC stocks for validation were obtained in 2009–2010 from degraded alpine meadows in two communes. We found that Century model can successfully capture grassland SOC changes. Overall, our simulation suggests that degraded alpine meadow SOC significantly increased with the advent of restoration managements from 2011 to 2030. Carbon sequestration rates ranged between 0.04 Mg C ha−1 yr−1 in lightly degraded winter grasslands and 2.0 Mg C ha−1 yr−1 in moderately degraded summer grasslands. Our modeling work also predicts that improve management in Tibetan degraded grasslands will contribute to an annual carbon sink of 0.022–0.059 Pg C yr−1. These results imply that restoration of degraded grasslands in Tibetan Plateau has great potential for soil carbon sequestration to mitigate greenhouse gases.

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9

Acic, Svetlana, U. Silc, S. Vrbnicanin, Svjetlana Cupac, G. Topisirovic, N. Stavretovic e Zora Dajic-Stevanovic. "Grassland communities of Stol mountain (eastern Serbia ): Vegetation and environment al relationships". Archives of Biological Sciences 65, n. 1 (2013): 211–27. http://dx.doi.org/10.2298/abs1301211a.

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Abstract (sommario):

The systematic survey of grassland communities was performed on Mt. Stol (eastern Serbia). The main aims of the research were to: (1) determine grassland vegetation types of the researched area; (2) correlate the impacts of the soil and environmental conditions on the occurrence of certain plant communities, and (3) comment on the conservational value of the grasslands in the researched area. The data set included 60 phytosociological relev?s of grasslands recorded between 2001 and 2004. The main environmental gradients of species composition were analyzed by Detrended Correspondence Analysis (DCA). For the ecological interpretation of ordination axes, ecological indicator values were used. Three associations were distinguished: Danthonietum calycinae, Asperulo-Agrostietum vulgaris and Ranunculo bulbosi- Arrhenatheretum elatioris belonging to two alliances and two classes: Chrysopogono-Danthonion - Festuco-Brometea and Arrhenatherion - Molinio-Arrhenatheretea. The results of the DCA support our assumption that the main environmental gradient in the species composition of the grasslands is related to nutrients and moisture. The conservational value of grasslands in the researched area is discussed.

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10

Floate, K. D., J. D. Shorthouse, D. J. Giberson e H. A. Cárcamo. "Arthropods of Canadian grasslands: a retrospective of a 40-year project of the Biological Survey of Canada". Canadian Entomologist 149, n. 6 (27 settembre 2017): 702–17. http://dx.doi.org/10.4039/tce.2017.46.

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AbstractThe Biological Survey of Canada initiated a project in 1979 to collect and synthesise information on the native arthropod fauna of the vanishing grassland habitats of Canada. At that time, it was thought that the Canadian arthropod fauna might comprise about 66 000 species. Recent studies suggest that the fauna may exceed 100 000 species, of which >25% may occur in the Prairies Ecozone. Results of this near 40-year project have been published in four volumes of the Arthropods of Canadian Grasslands monograph series of the Biological Survey of Canada. Here, the editors of this series review the grasslands project of the Biological Survey of Canada, summarise the contents of the volumes, and discuss current knowledge on the diversity of the grasslands arthropods of Canada. Whereas information on the species richness of some groups in the Prairies Ecozone is largely complete, information on the diversity of many other groups remains sparse. Reviewing the steps between initiation and publication of the Arthropods of Canadian Grasslands series may aid development of similar projects elsewhere. Identifying knowledge gaps will direct future research efforts. Identifying the diversity of grassland arthropods, their distribution and abundance, and the ecosystem services that they provide will facilitate efforts to conserve the remaining grassland habitats in Canada.

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Più fonti

Tesi sul tema "Grasslands – Research"

1

McGinley, Susan. "Changing Grasslands: Interactions Between Native and Non-Native Vegetation". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/622272.

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2

Littlefield, Joanne. "Trees, Grasslands and Global Change: New Perspectives on an Old Problem". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/622199.

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3

Martin, Tarryn. "Photosynthetic and evolutionary determinants of the response of selected C3 and C4 (NADP-ME) grasses to fire". Thesis, Rhodes University, 2009. http://hdl.handle.net/10962/d1003780.

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Abstract (sommario):

Species possess characteristics that are considered adapted to burning and these allow them to outcompete species and dominate in fire prone environments. It has therefore been proposed that fire might have played a critical role in the observed expansion of the grasslands, during the late Miocene. The aim of this study was (i) to investigate whether plant response to fire was a result of physiology or (ii) whether it was due to phylogenetic history. This was achieved by doing a pair-wise comparison between Panicoideae (and Panicoideae) and non-Panicoideae (Danthonioideae and Aristidoideae) species. Pre-fire characteristics, that would enhance fire frequency and assist with plant recovery after burning, were compared across phylogenies and photosynthetic type. Post fire plant recovery was then followed in a field and pot comparison which examined the re-growth of the leaf canopy area, leaf mass, above-ground biomass and the cost of this to the below-ground biomass. The pre-fire characteristics showed both a photosynthetic and phylogenetic response. It was found that the species showed a greater canopy death during winter and had a lower moisture content than the species. These characteristics would potentially contribute towards a larger fuel load in the species. However, the comparison of the dead standing biomass at the end of winter and the below-ground biomass, showed a phylogenetic response with the Panicoideae having a proportionally larger dead standing biomass and below-ground biomass than the non-Panicoideae. These results suggest that not only did the Panicoideae have a larger potential fuel load but that they also shunted carbon below-ground, enabling a fast recovery after being burned. The post-fire results were more strongly determined by phylogeny than by photosynthetic type. The Panicoideae recovered faster and more completely than the non-Panicoideae grasses, possibly contributing to their success and expansion under conditions of increased fire frequency. Although recovery of the and Panicoideae were similar, frequently burnt grasslands are dominated by the Panicoideae. Hence, this dominance cannot be explained by differences in their fire responses and may be determined by the post-fire environmental conditions that potentially advantage species possessing the photosynthetic pathway. Panicoideae dominance is limited to mesic environments where fire is the likely driver of grassland expansion while more arid environments are dominated by non-Panicoideae species. Representative species from these non-Panicoid subfamilies showed poor recovery after fire. This suggests that factors other than fire were the likely drivers of these xeric grassland expansions. The ability of these subfamilies, and particularly the species, to cope with drought remains a likely selective mechanism that requires further research.

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4

Dennis, S. J. "Nitrate leaching and nitrous oxide emission from grazed grassland: upscaling from lysimeters to farm". Lincoln University, 2009. http://hdl.handle.net/10182/1269.

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Irish agriculture is becoming increasingly regulated, with restrictions on fertiliser application rates and stocking rates to reduce nitrate (NO₀⁻) leaching losses. However these regulations have been, to date, based on minimal field research. The purpose of this study was to determine the actual leaching losses of nitrate from Irish dairy pasture at a range of stocking rates, and to investigate the effectiveness of the nitrification inhibitor DCD at reducing nitrate leaching losses where these are deemed excessive. In grazed pastures, a major source of leached nitrate is the urine patch, where a high rate of N is applied in one application. This trial recorded the losses from urine and non-urine areas of pasture separately. Nitrate leaching losses from three soils were recorded using lysimeters at Johnstown Castle, Co. Wexford, over two years. Total nitrate losses were higher from the freely drained Clonakilty and Elton soils than from the heavy Rathangan soil. Mean nitrate losses from urine patches ranged from 16 - 233 kg nitrate-N / ha⁻¹, and were reduced by up to 53% when DCD was applied. DCD also reduced peak and mean nitrate-N concentrations in many cases. In addition, DCD halved the nitrous oxide (N₂O) emission factor on the Rathangan soil, caused increases in pasture N content, and increased herbage yield in some treatments. The distribution of urine patches under dairy grazing was recorded using GPS at Kilworth, Co. Cork. Cows were also found to deposit 0.359 urine patches per grazing hour. A model was produced to predict field-scale nitrate leaching losses from dairy pasture at a range of stocking rates. At 2.94 cows per hectare, the highest stocking rate, annual field N loss was below 34 kg nitrate-N ha⁻¹, mean drainage N concentrations were below 5.65 mg nitrate-N L⁻¹ (the EU drinking water guideline value), and the worst-case-scenario autumn peak concentration did not exceed 21.55 mg nitrate-N L⁻¹ (above the EU Maximum Allowable Concentration (MAC) but below the World Health Organisation (WHO) drinking water limit). DCD reduced total annual field N loss by 21% (a conservative estimate), and also reduced mean and peak nitrate concentrations. Provided fertiliser application rates are at or below 291 kg N ha⁻¹, and based on current legislative values for drinking water quality, this trial does not support any blanket restrictions on the stocking rate of Irish dairy farms. However where particularly high water quality is required, DCD shows potential as a useful tool to achieve low nitrate concentrations.

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5

Meffin, Ross. "Invasion success and impacts of Hieracium lepidulum in a New Zealand tussock grassland and montane forest". Lincoln University, 2010. http://hdl.handle.net/10182/1808.

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Invasive species represent a major concern; they can result in serious ecological and economic losses and are recognised as one of the most serious threats to global species diversity. Plant invasions are of particular concern in New Zealand, which has high proportions of both naturalised and endemic plant species. In this thesis I focussed on the invasive plant Hieracium lepidulum, an exotic weed introduced from Europe to New Zealand prior to 1941. It is invasive in a variety of habitats in the South Island, where it has steadily increased in distribution and abundance over the last 50 years, and is thought to have detrimental impacts on native plant communities. I investigated factors influencing its invasion success and tested for impacts on native plant communities, making extensive use of existing plots into which H. lepidulum was experimentally introduced in 2003. I examined how community richness, turnover, resource availability and propagule pressure of the invader interacted to determine the invasion success of H. lepidulum. Results differed markedly above and below treeline. Above treeline, plots with higher richness and turnover were more invaded; below treeline, plots with higher available light were more invaded. In both habitats, these findings were modified by the influence of propagule pressure; at low propagule pressure, site characteristics were non-significant in explaining invasion success, while at higher propagule pressure these effects became significant. To test for impacts resulting in altered community composition and structure, I looked for changes in community richness, diversity and evenness subsequent to H. lepidulum introduction. As impacts may be more apparent at fine spatial scales, I made measurements at a 5 x 5 cm cell scale in addition to the established 30 x 30 cm plot scale. Plot species richness increased from 2003 to 2009 and a component of this increase was associated with H. lepidulum density. Other relationships between the plant community and H. lepidulum were generally non-significant. Results showed that H. lepidulum has had no negative effects on community richness, evenness or diversity. Despite being able to opportunistically colonise grassland sites with high turnover, and forest sites subject to canopy disturbance, dependant on propagule pressure, it appears H. lepidulum has not impacted community composition or structure.

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6

Lamarque, Pénélope. "Une approche socio-écologique des services écosystémiques. Cas d'étude des prairies subalpines du Lautaret". Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENV036/document.

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Abstract (sommario):

Le concept de services écosystémiques est de plus en plus utilisé par différentes disciplines scientifiques et pris en compte dans les sphères politiques pour attirer l'attention sur les bénéfices que l'Homme reçoit des écosystèmes. Ce concept mène à étudier les liens complexes entre l'homme et son environnement. Cependant, la majorité des recherches actuelles restent théorique et peu de cas d'étude mettent à l'épreuve ce concept dans une démarche transdisciplinaire. Cette thèse à donc pour objectif principal de combler ce manque en explorant et analysant les dynamiques et processus des services écosystémiques en terme d'offre et de demande, y compris les effets de rétroactions, par une approche socio-écologique dans un contexte de changement planétaire. A cette fin, une étude transdisciplinaire a été conduite sur les prairies subalpines de la commune de Villar d'Arène (Hautes-Alpes) où l'élevage ovin et bovin domine. Des techniques de modélisations statistiques et de systèmes d'informations géographiques ont été combinées pour analyser la fourniture potentielle de services écosystémiques, conduisant à une cartographie de ceux-ci à l'échelle du paysage. La demande en services écosystémiques à quant à elle été étudiée par l'intermédiaire d'entretiens individuels et de groupes avec les acteurs locaux ainsi que des jeux de rôle avec les éleveurs de la commune. La co-construction de scénarios prospectifs avec les acteurs locaux ont permis d'étudier l'évolution de l'offre et la demande en services à un horizon 2030
The ecosystem service (ES) concept is increasingly used in different scientific disciplines and is spreading into policy and business circles to draw attention to the benefits that people receive from biodiversity and ecosystems. Nevertheless, while the number of case studies considering various dimensions of the interactions between ecosystems and land use via ES has been steadily increasing, integrated research addressing interrelationships between biodiversity, ES and land use has remained mostly theoretical. This thesis aims through a socio-ecological approach to understand: (1) Which ES are potentially delivered given ecological dynamics, (2) how these ES are perceived by stakeholders in terms of value and knowledge, (3) how human management affects ES delivery, and (4) how ES are taken into account in land management decisions, thereby considering feedbacks from ecosystem to the land use system through ES. To address these questions, an interdisciplinary study was conducted on Villar d'Arène (French Alps) a municipality where the subalpine landscape is shaped by extensive mountain livestock farming. Statistical modelling and geographical information systems where combined to analyse the determinants of the spatial distribution of biodiversity and ES within the landscape using ecological (including plant functional traits), biophysical and land-use data. The following ES were mapped: agronomic value, aesthetic value, water quality, carbon storage, soil fertility, soil moisture, conservation of plant diversity and pollination. These allowed us to quantify trade-offs and synergies in the current landscape and to identify key management types supporting multifunctionality. The dynamics of ES was projected under four different scenarios integrating climatic, socio-economic and land-use changes, which were developed using a participative approach with regional experts and local farmers. Analyses of projected scenario impacts showed that ES synergies and trade-offs evolve differently when considering direct effects of climate on ecosystems, and/or their indirect effects through farmers adaptive responses. Interviews with local stakeholders (experts from nature conservation and agricultural extension, farmers and inhabitants) of mountain grasslands showed that the ES concept is still relatively unknown in explicit terms. Nevertheless after defining ES to interviewees, they expressed a variety of relevant interests and knowledge. Although all stakeholders valued a common set of ecosystem services (agronomic value, aesthetic value, water quality, and conservation of plant diversity), we identified negative and positive representations of the effects of grassland management on ecosystem services, depending on stakeholders perceptions of the relationships between soil fertility and biodiversity, and biodiversity and the other services. Finally, a role-playing game explored how ES cognition mediated environmental feedbacks on farmers' behaviours. Results emphasized the influence of other factors such as socio-economic or climatic context, topographic constraints, social value of farming or farmer individual and household characteristics, on the link between ES and land-management decisions. This case study demonstrates the interest of an integrated approach decomposing the feedback loop from ecosystems to land use when studying ES for scientific or policy purposes

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7

Field, Louise Fabienne. "Consequences of habitat fragmentation for the pollination of wildflowers in moist upland grasslands of KwaZulu-Natal". Thesis, 2002. http://hdl.handle.net/10413/10204.

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Abstract (sommario):

Large areas of moist upland grassland in KwaZulu-Natal are severely fragmented due to large scale farming of exotic trees. The aims of this thesis were to determine whether habitat fragmentation of these grasslands has a detrimental effect on plant-pollinator interactions and hence the reproductive output of the wildflower species occurring there and whether the magnitude of this effect can be predicted by breeding and pollination system characteristics. The 24 wildflower species included in this study appear to support a rich and diverse pollinator community, including long-tongued solitary bees, long-tongued flies, hawkmoths and sunbirds. Two thirds of the wildflower species appear relatively specialised in terms of pollination, with six species entirely dependent either on a single species or a specific functional type of pollinator for pollination. The majority of wildflower species (90%) were found to be incapable of autonomous self-pollination and thus dependent on pollinators for fruit and seed set. At least six species are obligately xenogamous. Little evidence was found for pollen limitation in undisturbed moist upland grassland, suggesting that these grasslands are characterised by high levels of pollinator activity. Greater levels of pollen limitation of reproductive output in habitat fragments was evident in two species, suggesting that depressed reproductive output in habitat fragments may be the consequence of a decrease in the quantity and/or quality of pollinator services. Significant detrimental effects of habitat fragmentation on reproductive output were evident in two thirds of the wildflower species, with 94% of the species exhibiting overall declines in seed set per flower from the continuous grassland site to the habitat fragments. The median decline in seed set per flower for the wildflower species was found to be 33.0%. Significantly more species experienced overall declines in reproductive output than would have been expected by chance alone. Only specificity of the pollination interaction in terms of number of pollinator taxa involved was found to be significantly related to percentage change in seed set from continuous to fragment habitats. This effect was diminished when other factors were included in a multiple regression. Results support Bond's (1994) hypothesis that degree of specificity in pollination systems is important in determining extinction risk of a given plant species. Declines in reproductive output of a range of wildflower species in grassland habitat fragments may affect the local persistence of these populations, particularly if recruitment is seed-limited.
Thesis (M.Sc.)-University of Natal, Pietermaritzburg, 2002.

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8

Arnott, Wendy Lynn. "The effect of burning frequency on invertebrate and indigenous flowering forb diversity in a Drakensberg grassland ecosystem". Thesis, 2006. http://hdl.handle.net/10413/8029.

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The KwaZulu-Natal Drakensberg, South Africa, is predominantly a grassland ecosystem maintained by fire. The effect of the current burning regime on invertebrate and flowering forb diversity in this ecosystem is poorly understood. The overall aim ofthis study was to contribute towards the development of an effective burning regime for the KwaZulu-Natal Drakensberg that will conserve invertebrates and indigenous forbs, two major components of biodiversity. The objectives were to examine the effect of fire and fire frequency on flowering forb and invertebrate species diversity, to determine whether fire frequency, time since last burn or locality were influencing species composition, and to identify potential biodiversity indicators that reflect overall species richness for use in monitoring of invertebrates and forbs. Sampling took place in March, September and November of 2002 at Giants Castle Game Reserve. Invertebrates were sampled using sweep netting and targeted netting along transects, yellow pan traps and soil quadrats. Invertebrate taxa sampled were ants (Formicidae), butterflies (Lepidoptera), grasshoppers (Orthoptera), leafboppers (Cicadellidae), bees (Apoidea), bee flies (Bombyliidae), hover flies (Syrphidae), robber flies (Asilidae), spiders (Araneae), earthworms (Oligochaeta) and millipedes (Diploda). These were identified to species level with the assistance of taxon experts. Flowering forbs were sampled using five replicates of five by five metre quadrats randomly placed in each site. Overall flowering forb and invertebrate species diversity was higher in grasslands that were burnt for two consecutive years in 2001 and 2002 than in grasslands that were not burnt during those two years. Frequently (annual) and intermediately (biennial) burnt grasslands had significantly higher invertebrate and flowering forb diversity than infrequently (five years without burning) burnt grasslands. This, together with the fact that grasslands burnt during the year of sampling had higher species richness than grasslands burnt two and five years previously suggests that invertebrates and forbs are generally resilient to fire and many forb species appear to be stimulated by fire. However, each burn frequency had its own suite of unique flowering forb and invertebrate species. Invertebrate communities were influenced mostly by locality and the length of time past since the last fire and flowering forb communities were influenced mostly by the length oftime past since the last fire. Fire frequency had the least influence on both invertebrate and forb communities. Ecological succession occurred after each fire in the invertebrate communities but forb communities appear to need more than five years without fire for ecological succession to occur. The findings of this study therefore suggest that using a combination of three fire frequencies would result in patches of grassland in various stages of ecological succession, and would conserve species unique to each burning frequency, and would therefore conserve maximum diversity. Flowering forb species richness and certain invertebrate taxa (ants, leafboppers, spiders and bees) have the potential to act as indicators of overall invertebrate species richness for use in monitoring programmes.
Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2006.

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TSAI, MENG-CHI, e 蔡孟其. "Performance and Research of Pipa Concerto"Little Sisters Of The Grassland"". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/za3c38.

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碩士
國立臺北教育大學
音樂學系碩士班
104
Pipa is a plucked string instrument with long history as well as plays an important role in music history. Due to the development of generations, now there is only one structure of pipa, which can be widely used in accompaniment,instrumental ensemble and concerto. Having the 20-year learning experience of pipa, I am familiar with every song for sure. Among all of them, I am deeply attracted by "Little Sisters Of The Grassland", which symbolizes the peak of pipa music skill and performance, thus many researchers and performers discoursed on it and made me research on it more thoroughly. The reason why I chose "Little Sisters Of The Grassland" as my thesis topic is because "Little Sisters Of The Grassland" has many different arrangements and performing ways. Besides, based on the historical development, my thesis researches on every composer’s background and concept of creation then put emphasis on performing and researching on this song. Most important of all, this research is aimed at making changes and adding new materials in different styles, and hoping to have a better understanding of this song. This thesis takes piano accompaniment version of "Little Sisters Of The Grassland" for example to research and perform it. There are 5 chapters in my thesis, which are introduction、the development history of pipa、the introduction of composer and the creation background of "Little Sisters Of The Grassland"、performance and research of "Little Sisters Of The Grassland", and conclusion. On the basis of creation background of "Little Sisters Of The Grassland", I analyze the performance and research deeply, hoping to help more performers understand the content of this work.

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Flynn, Dan F. B. "Linking plant traits and herbivory in grassland biodiversity-ecosystem functioning research". Thesis, 2011. https://doi.org/10.7916/D8MK6KV0.

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Increased availability of data on morphological, physiological, and behavioral traits of species has improved understanding of the processes driving community assembly and the consequences of community disassembly for ecosystem functioning. In addition, there has also been a call for advancing the multitrophic view of biodiversity- ecosystem functioning. Here I propose a trait-based framework to merge plant-herbivore interactions with biodiversity-ecosystem function relationships. This framework links plant growth and defense strategies, herbivore feeding preferences, and primary production in terrestrial plant communities. I empirically tested these proposed linkages in laboratory and field experiments carried out in the understudied grasslands of Inner Mongolia, China. I found that a dominant generalist grasshopper Oedaleus asiaticus exhibits feeding preference for plants of high palatability when equally available, but in the field feeds on nearly any graminoid which is dominant. This behavior potentially allows subdominant plants to coexist, maintaining plant diversity. To link feeding behavior to consequences for plant communities, I carried out detailed measurements of plant morphological and physiological traits in the field and experimentally manipulated grasshopper feeding intensity. Using a novel analytical tool, I found that plant communities in these grasslands exhibit high niche overlap, regardless of intensity of herbivory by grasshoppers or sheep. This result indicates that environmental filtering structures these communities more than limiting similarity. Extending the use of traits beyond the study system in Inner Mongolia, I test the how both functional and phylogenetic diversity explain the biodiversity effect on grassland ecosystem functioning. The promise for merging tools from evolutionary biology and functional ecology is great, as these diversity metrics provide superior explanatory power in a meta-analysis of biodiversity experiments. Future work should be addressed at clarifying which functional traits are most strongly reflected in measures of phylogenetic diversity, including strategies of compensating for or avoiding herbivory.

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Più fonti

Libri sul tema "Grasslands – Research"

1

Ratliff, Raymond D. Estimating botanical composition by the dry-weight-rank method in California's annual grasslands. Berkeley, Calif. (P.O. Box 245, Berkeley 94701): U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station, 1990.

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Cao di zi yuan yan jiu: Zhang Zutong wen ji = Research on grassland resources : selected works of Zhang Zutong. Huhehaote Shi: Nei Menggu da xue chu ban she, 2004.

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Mueggler, W. F. Cliff Lake Bench Research Natural Area: Problems encountered in monitoring vegetation changes on mountain grasslands. Ogden, Utah (324 25th St. Ogden 84401): U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station, 1992.

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P, Barnhart Edward, a cura di. Nitrous oxide emissions research progress. Hauppauge, NY: Nova Science Publishers, 2009.

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William, Olupot, a cura di. Conservation research in Uganda's savannas: A review of park history, applied research, and application of research to park management. New York: Nova Science Publishers, 2010.

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Olupot, William. Conservation research in Uganda's savannas: A review of park history, applied research, and application of research to park management. Hauppauge, N.Y: Nova Science Publisher's, 2009.

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Growth Retardants for Amenity Grasslands (Conference) (1985 Kidlington). Report of a Workshop on Growth Retardants for Amenity Grasslands, held at Exeter Hall, Kidlington, Oxford, and at the Weed Research Organization, Begbroke Hill, on 15 May 1985. [Bingley]: National Turfgrass Council, 1985.

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International Society of Root Research. Symposium. Root demographics and their efficiencies in sustainable agriculture, grasslands, and forest ecosystems: Proceedings of the 5th symposium of the International Society of Root Research, held 14-18 July 1996 at Madren Conference Center, Clemson University, Clemson, South Carolina, USA. Dordrecht: Kluwer Academic, 1998.

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International Grassland Congress (16th 1989 Nice, France). Grassland systems approaches: Some French research proposals. A cura di Capillon A, Departement de Recherches sur les systemes agraires et le developpement. e Research on Grassland Systems Workshop (1989 : Nice, France). Versailles Cedex: Département de recherches sur les systémes agraires et le développement, 1989.

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't Mannetje, L., e R. M. Jones, a cura di. Field and laboratory methods for grassland and animal production research. Wallingford: CABI, 2000. http://dx.doi.org/10.1079/9780851993515.0000.

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Capitoli di libri sul tema "Grasslands – Research"

1

Dikshit, K. R., e Jutta K. Dikshit. "Natural Vegetation: Forests and Grasslands of North-East India". In Advances in Asian Human-Environmental Research, 213–55. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7055-3_9.

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2

Paolini, Marilena, Valentina Nanni, Paolo Annicchiarico, Luciano Pecetti, Andrea Formigoni, Alberto Palmonari, Giorgia Canestrari et al. "New Insights into Alfalfa Forage Quality Through the Research Project Qual&Medica". In Quantitative Traits Breeding for Multifunctional Grasslands and Turf, 157–61. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-9044-4_23.

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Papademetriou, K., V. Karagiannakidou, M. Konstantinou e P. Dimopoulos. "Phytosociological Research of the Above the Timberline Grasslands of Mount Pangeon (NE Greece)". In Progress in Botanical Research, 117–20. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5274-7_27.

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Nesheim, Lars. "Grassland Surveys in North Norway". In Grazing Research at Northern Latitudes, 63–68. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4757-5338-7_6.

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Miniat, Chelcy Ford, Jennifer M. Fraterrigo, Steven T. Brantley, Mac A. Callaham, Susan Cordell, Jeffrey S. Dukes, Christian P. Giardina, Shibu Jose e Gary Lovett. "Impacts of Invasive Species on Forest and Grassland Ecosystem Processes in the United States". In Invasive Species in Forests and Rangelands of the United States, 41–55. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45367-1_3.

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AbstractIn this chapter, we describe current understanding of and identify research gaps on how invasive species directly, and indirectly, affect ecosystem processes. Specifically, we focus on how invasive species can alter the terrestrial carbon, nitrogen, and hydrologic cycles and how changes to these terrestrial cycles cascade to affect water quantity and quality. While invasive species may alter other ecosystem processes, we focus on these due to their importance to policy, to the public, and to their likely interaction with climate change effects. For example, carbon sequestration and surface water supply originating from forests and grasslands (Caldwell et al. 2014) are important policy and public concerns, and drought frequency and intensity will likely increase with climate change (Vose et al. 2016a). Our goal is to draw generalizations rather than provide details on invasive species effects on a case-by-case basis. We do, however, provide case studies for illustration and draw linkages with other chapters that provide detailed coverage to disturbance regimes (Chap. 10.1007/978-3-030-45367-1_5) and types and mechanisms of ecological impact caused by invasive insects (Chap. 10.1007/978-3-030-45367-1_2).

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Zhou, Wei, Jianlong Li e Tianxiang Yue. "Research Progress of the Grassland Carbon Cycle and Grassland Degradation in China". In Springer Geography, 1–16. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9382-3_1.

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Babalonas, D., A. P. Mamolos e M. Konstantinou. "Spatial Organization of a Grassland Related to Metalliferous Soil Variability". In Progress in Botanical Research, 261–64. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5274-7_58.

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Calanca, Pierluigi, e Jürg Fuhrer. "Swiss Agriculture in a Changing Climate: Grassland Production and its Economic Value". In Advances in Global Change Research, 341–53. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3425-3_13.

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Siman, G., A. Dam Kofoed, K. E. Larsen, E. Kemppainen e S. Steineck. "Utilization of nitrogen from slurry applied to fodder crops. Research report from the Nordic countries, Denmark, Finland and Sweden". In Animal Manure on Grassland and Fodder Crops. Fertilizer or Waste?, 157–73. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3659-1_10.

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Jones, M. B. "The Effects of Elevated Carbon Dioxide Levels on the Growth of Crop Plants: An Attempt to Predict the Consequences for Grassland and Maize Production in Europe". In Current Issues in Climate Research, 294–308. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-5494-6_27.

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Atti di convegni sul tema "Grasslands – Research"

1

ARIVA, Jelena, Katri KALL, Liis OPER e Ants-Hannes VIIRA. "EFFECTS OF THE RESTRICTIONS OF PRACTICES USED FOR THE MAINTENANCE OF PERMANENT GRASSLANDS". In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.163.

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From 2004-2015, the utilised agricultural area (UAA) in Estonia increased by 25%. Half of the UAA growth arose from the increase in the area of permanent grassland temporarily not used for production purposes. The main driver of growth in such land has been single area payment (SAP) paid in Estonia since the EU accession in 2004. While subsidising the maintenance of permanent grassland not used for agricultural production is in line with the objectives of the EU Common Agricultural Policy (CAP), it fuels discussions about the effects of this policy on agricultural producers. For every year, member states establish practices equivalent to maintenance of permanent grassland. Until 2014, in Estonia, the minimum activity for the maintenance of permanent grassland under the SAP, was harvesting the grass or chopping it and leaving on the ground. In 2015 and 2016 options for chopping and leaving the grass on the ground were restricted with an aim to target SAP more towards active land users, i.e. agricultural producers. Both agricultural producers and non-producers maintain permanent grassland not used for production purposes. Research on the practices used by different types of actors helps in understanding the variety of practices and potential effects of restrictions of these practices. The survey data was combined with the data from the registries of Estonian Agricultural Registers and Information Board (ARIB), to analyse the potential effects of restrictions of practices on agricultural producers and the area of permanent pasture in Estonia. The results indicate that both agricultural producers and non-producers use grass harvesting and chopping practices. Therefore, restrictions that have effect on both groups of land users are not the most efficient way of targeting SAP towards agricultural producers, and potentially reduce the area of permanent grasslands. This result would be in conflict with the aims of the CAP.

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MALENČIĆ, ĐORĐE, DUBRAVKA ŠTAJNER, MILAN POPOVIĆ, ALEKSA KNEŽEVIĆ, LJILJANA NIKOLIĆ e DEJANA DŽIGURSKI. "ANTIOXIDANT SYSTEMS IN SOME RARE AND ENDANGERED PLANT SPECIES FROM THE PANNONIAN SALINE MEADOWS AND GRASSLANDS". In Proceedings of the 9th International Symposium on Interdisciplinary Regional Research. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812834409_0010.

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Shipilov, Ivan. "Formation of productive phytocenoses of a long period of use with the improvement of degenerate grass stands". In Multifunctional adaptive fodder production23 (71). ru: Federal Williams Research Center of Forage Production and Agroecology, 2020. http://dx.doi.org/10.33814/mak-2020-23-71-140-143.

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Based on long-term research in the dry steppe zone, recommendations are given for improving low-productive meadow phytocenoses based on the selection of adaptive perennial legumes and cereals, low-cost methods of surface improvement. It was found that the restored grasslands provide up to 13.0–15.0 t/ha of high-quality green mass, which exceeds the productivity of unimproved grounds by 2.4–2.9 times.

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GURSKIENĖ, Virginija, e Justina JATUŽYTĖ. "LAND USE IN ŽUVINTAS BIOSPHERE RESERVE". In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.053.

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The aim of the study – to assess the current land use and sustainable farming possibilities in the area of the Žuvintas Biosphere Reserve. Mathematical statistical analysis, graphing, interviews, induction and other methods were used during the research. Agricultural censuses, agricultural land and crop declaration (that had been carried out between the years 2012 and 2014) and some other data were analyzed. Intensive farming was established in the group of agrarian areas landscape management zones: conventional industrial farming in the landscape management zone. In the analyzed Simnas, Krosna and Igliauka subdistricts land is used quite extensively, therefore restructuring, in order to improve the ecological conditions, is possible not reducing the volume of production, but in accordance with the guidelines. In the territory of the Žuvintas Biosphere Reserve the declared crop area increased by 0.4 per cent from 2012 to 2014, perennial grass area increased by 4.01 per cent. Sustainable farming was set in the Amalvas polder and peat soils as well as in areas sensitive to surface and groundwater pollution. In the major part of the polder extensive agriculture is developed, it is mainly natural grasslands and pastures as well as cultivated grasslands. SWOT analysis was performed.

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Banaszek, Jarosław, Marzena Leksy e Oimahmad Rahmonov. "The ecological diversity of vegetation within urban parks in the Dąbrowski Basin (southern Poland)". In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.005.

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The aim of this work is to present the diversity of flora in terms of ecological requirements. The research was conducted in the area of two urban parks in the area of two cities in southern Poland: Bedzin and Czeladz. These parks were established in different historical periods, and were planned (and are managed) differently. The results of the investigation have shown that the occurrence of 192 vascular species has been observed in the Gora Zamkowa (Castle Hill) Park, while in the Grabek park, 334 such species are known to exist. Such disparity is the result of the occurrence of micro-habitats and of the differences between the ways the two parks are managed. It is also due to these parks’ different functions. In the first case, the park area is protected by law. In the latter case, human activity has created a new ecological niche for organisms with a high degree of ecological tolerance. Based on the ecological values, the following groups of plants were distinguished: saxi-frages grasslands, xerothermic grasslands, beech forests, alder forests and artificial planted trees. Analysis has shown that ur-ban parks are potential places for growth various type of vegetation and also for increasing biodiversity, and can constitute particularly important hotspots for biodiversity in the cityscape, even if their primary role is recreational. As the study shows, the environment of a highly urbanized and industrialized region can also have a positive influence on ecological and floristic diversity.

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WRZASZCZ, Wioletta. "THE CAP GREENING EFFECTS – THE POLISH EXPERIENCE". In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.212.

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In 2015 greening requirements were implemented. All farmers entitled to the Single Area Payment are obliged to implement greening, depending on agricultural surface and structure. Presently, 30% of the national financial envelope is connected with greening. Legal rules obliged farmers to more environmental friendly farms` organization. The European Commission regulations indicated the importance of crop diversification in the context of soil quality improvement, the maintenance of permanent grasslands in order to ensure the carbon sequestration, soil protection and biodiversity, as well as the maintenance of ecological focus areas that guarantees biodiversity at the farm level. The aim of the paper is to present the farms` organizational changes and outcomes after the implementation of greening mechanism. Polish FADN data were used for 2014 and 2015, that covered 5.7 thousand farms. The research results indicated the farms` adaptation to greening requirements. The production capacity of the analysed FADN farms did not decrease after the greening mechanism introduction. Farmers combined production objectives with environmental ones, that was the result of farms` proper organization and enlarging agricultural land. The scope of changes introduced in plant production referring to the greening requirements was insignificant and concerned mainly larger farms (with arable land area of 15 ha and more). Farmers introduced the required organizational changes smoothly, mainly by increasing area under leguminous and papilionaceous plants. The environment-friendly farms’ organization before greening introduction facilitated their adaptation in 2015. In the short term, greening doesn’t cause negative productive and economic outcomes. In the longer perspective, greening environmental effects should contribute to factor productivity increase.

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Zhang, Xuening, Yong You e Decheng Wang. "Grassland soil-root complex and its research methods". In 2021 ASABE Annual International Virtual Meeting, July 12-16, 2021. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2021. http://dx.doi.org/10.13031/aim.202100370.

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Sun, Yuan, Xing-fa Gu, Tao Yu, Feng Zhao, Xing-feng Chen, Hai-liang Gao e Juan Li. "Research on 3D canopy's reflectance model of semi-arid grassland". In IGARSS 2010 - 2010 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2010. http://dx.doi.org/10.1109/igarss.2010.5652658.

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Baokang Liu, Fujiang Hou e Yu'e Du. "Research of potential carbon sequestration for grassland in Qinghai province". In 2011 International Conference on Multimedia Technology (ICMT). IEEE, 2011. http://dx.doi.org/10.1109/icmt.2011.6002694.

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Xin, Zhe, Shunxi Wang, Qingyun Guan, Feng Yun e Yeneng He. "Research advances of grassland fire spread modeling and numerical simulation". In 2013 International Conference on Manufacture Engineering and Environment Engineering. Southampton, UK: WIT Press, 2013. http://dx.doi.org/10.2495/meee131962.

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Rapporti di organizzazioni sul tema "Grasslands – Research"

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Finch, Deborah M., Carolyn Baldwin, David P. Brown, Katelyn P. Driscoll, Erica Fleishman, Paulette L. Ford, Brice Hanberry, Amy J. Symstad, Bill Van Pelt e Richard Zabel. Management opportunities and research priorities for Great Plains grasslands. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2019. http://dx.doi.org/10.2737/rmrs-gtr-398.

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Finch, Deborah M., Carolyn Baldwin, David P. Brown, Katelyn P. Driscoll, Erica Fleishman, Paulette L. Ford, Brice Hanberry, Amy J. Symstad, Bill Van Pelt e Richard Zabel. Management opportunities and research priorities for Great Plains grasslands. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2019. http://dx.doi.org/10.2737/rmrs-gtr-398.

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Author, Not Given. Environmental audit of the High Plains Grasslands Research Station, Cheyenne, Wyoming. Office of Scientific and Technical Information (OSTI), dicembre 1988. http://dx.doi.org/10.2172/6413898.

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