Relevant bibliographies by topics / Reshuffling of floristic composition

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Academic literature on the topic 'Reshuffling of floristic composition'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Journal articles on the topic "Reshuffling of floristic composition"

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Honorio Coronado, E. N., T. R. Baker, O. L. Phillips, et al. "Multi-scale comparisons of tree composition in Amazonian terra firme forests." Biogeosciences 6, no. 11 (2009): 2719–31. http://dx.doi.org/10.5194/bg-6-2719-2009.

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Abstract. We explored the floristic composition of terra firme forests across Amazonia using 55 plots. Firstly, we examined the floristic patterns using both genus- and species-level data and found that the species-level analysis more clearly distinguishes among forests. Next, we compared the variation in plot floristic composition at regional- and continental-scales, and found that average among-pair floristic similarity and its decay with distance behave similarly at regional- and continental-scales. Nevertheless, geographical distance had different effects on floristic similarity within regions at distances <100 km, where north-western and south-western Amazonian regions showed greater floristic variation than plots of central and eastern Amazonia. Finally, we quantified the role of environmental factors and geographical distance for determining variation in floristic composition. A partial Mantel test indicated that while geographical distance appeared to be more important at continental scales, soil fertility was crucial at regional scales within western Amazonia, where areas with similar soil conditions were more likely to share a high number of species. Overall, these results suggest that regional-scale variation in floristic composition can rival continental-scale differences within Amazonian terra firme forests, and that variation in floristic composition at both scales is influenced by geographical distance and environmental factors, such as climate and soil fertility. To fully account for regional-scale variation in continental studies of floristic composition, future floristic studies should focus on forest types poorly represented at regional scales in current datasets, such as terra firme forests with high soil fertility in north-western Amazonia.
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Ju, Shuming, Peijiao Bu, Yuting Zhang, et al. "Floristic Composition and Characteristics of Xuzhou, China." IOP Conference Series: Earth and Environmental Science 598 (November 25, 2020): 012015. http://dx.doi.org/10.1088/1755-1315/598/1/012015.

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Honorio Coronado, E. N., T. R. Baker, O. L. Phillips, et al. "Integrating regional and continental scale comparisons of tree composition in Amazonian terra firme forests." Biogeosciences Discussions 6, no. 1 (2009): 1421–51. http://dx.doi.org/10.5194/bgd-6-1421-2009.

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Abstract. We contrast regional and continental-scale comparisons of the floristic composition of terra firme forest in South Amazonia, using 55 plots across Amazonia and a subset of 30 plots from northern Peru and Ecuador. Firstly, we examine the floristic patterns using both genus- or species-level data and find that the species-level analysis more clearly distinguishes different plot clusters. Secondly, we compare the patterns and causes of floristic differences at regional and continental scales. At a continental scale, ordination analysis shows that species of Lecythidaceae and Sapotaceae are gradually replaced by species of Arecaceae and Myristicaceae from eastern to western Amazonia. These floristic gradients are correlated with gradients in soil fertility and to dry season length, similar to previous studies. At a regional scale, similar patterns are found within north-western Amazonia, where differences in soil fertility distinguish plots where species of Lecythidaceae, characteristic of poor soils, are gradually replaced by species of Myristicaceae on richer soils. The main coordinate of this regional-scale ordination correlates mainly with concentrations of available calcium and magnesium. Thirdly, we ask at a regional scale within north-western Amazonia, whether soil fertility or other distance dependent processes are more important for determining variation in floristic composition. A Mantel test indicates that both soils and geographical distance have a similar and significant role in determining floristic similarity across this region. Overall, these results suggest that regional-scale variation in floristic composition can rival continental scale differences within Amazonian terra firme forests, and that variation in floristic composition at both scales is dependent on a range of processes that include both habitat specialisation related to edaphic conditions and other distance-dependent processes. To fully account for regional scale variation in continental studies of floristic composition, future floristic studies should focus on forest types poorly represented at regional scales in current datasets such as terra firme forests with high soil fertility from north-western Amazonia.
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Bulokhov, A. D. "Floristic regional subdivision and syntaxonomy." Vegetation of Russia, no. 5 (2003): 19–27. http://dx.doi.org/10.31111/vegrus/2003.05.19.

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The advantages of using floristic subdivision of the area for syntaxonomic purposes are discussed. The analysis of changes in floristic composition of East-European broad-leaved forest communities along the West-East continentality gradient shows that floristic differences between the adjacent provinces correspond to changes in species composition at the association or the alliance level. A new association, Lathyro nigri—Quercetum roburis (all. Aceri tatarici—Quercion Zolyomi 1957, order Quercetalia pubescenti-petraeae Klika 1933), is established for the Southern Non-Chernozem region of European Russia.
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Brocque, Andrew F. Le, and Rod T. Buckney. "Multivariate Relationships between Floristic Composition and Stand Structure in Vegetation of Ku-ring-gai Chase National Park, New South Wales." Australian Journal of Botany 45, no. 6 (1997): 1033. http://dx.doi.org/10.1071/bt95042.

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The relationships between stand structure and floristic composition were examined from data collected from 100 quadrats on two soil types: Hawkesbury sandstone and Narrabeen group soils, occurring within Ku-ring-gai Chase National Park, New South Wales. Floristic composition was determined using the frequency of species occurring within nine concentric sub-quadrats of total area 500 m2. Stand structure was determined by a multivariate classification scheme utilising the foliage projective cover of eight strata within each quadrat. The patterns in floristic composition and stand structure were examined through multivariate analyses. Procrustes analysis of non-metric multidimensional scaling ordinations of both the stand structure and composition data showed floristic composition gradients to be well recovered by the structure data. Similar gradients were evident in both vegetation attributes, between and within the two soil types, with the rank order of community types across the ordinations being the same. However, some important differences were evident between the ordinations of floristic composition and stand structure between and within soil types. A number of floristically dissimilar communities exhibited very similar multivariate structural characteristics. In particular, two floristically distinct communities on different soil types were indistinguishable in terms of their structural characteristics. The multivariate analyses suggest a possible convergence of some compositionally distinct communities towards a common structural formation.
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Chanamé-Zapata, Fernán Cosme, María Custodio-Villanueva, Raúl Marino Yaranga-Cano, and Rafael Antonio Pantoja-Esquivel. "Diversity of the riparian vegetation of high Andean wetlands of the Junín region, Peru." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 14, no. 3 (2019): 1. http://dx.doi.org/10.4136/ambi-agua.2271.

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The diversity of the riparian vegetation of five high Andean lagoons of the Junin region was evaluated between March and December of 2017. The sampling of the riparian vegetation was carried out by means of the transect method. The unidentified species were collected for later identification in the herbarium. The diversity was determined by floristic composition, abundance and frequency, and by species richness indices of Simpson and Shannon-Wiener. In the Pomacocha Lagoon, the floristic composition was represented by 43 species, distributed in 15 families, with the most abundant species being Aciachne pulvinata, Azorella crenata and Geranium sessiliflorum and the most frequent Aciachne pulvinata. In the Laguna Tragadero, the floristic composition was represented by 17 species, distributed in 10 families, with the most abundant species being Pennisetum clandestinum and Eleocharis sp and the most frequent Polypogon interruptus. In the Cucancocha Lagoon, the floristic composition was represented by 19 species, distributed in 7 families, with the most abundant species being Calamagrostis sp and Wernberia humbellata and the one of most frequent Carex ecuadorica. In the Incacocha Lagoon, the floristic composition was represented by 22 species, distributed in 11 families, with the most abundant and frequent species being Alchemilla pinnata. In the Ñahuinpuquio Lagoon, the floristic composition was represented by 20 species, distributed in 9 families, with the most abundant species being Pennisetum clandestinum and the most frequent species Pennisetum clandestinum, Juncus arcticus and Muhlenbergia andina. The results obtained contribute data on the diversity of riparian vegetation of high Andean wetlands in the Junin region, Peru.
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Higgins, Mark A., Kalle Ruokolainen, Hanna Tuomisto, et al. "Geological control of floristic composition in Amazonian forests." Journal of Biogeography 38, no. 11 (2011): 2136–49. http://dx.doi.org/10.1111/j.1365-2699.2011.02585.x.

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Hossain, Gazi Mosharof, Saleh Ahammad Khan, Md Abdur Rahim, Mohammad Sayedur Rahman, and Khandaker Mohammad Noor Islam. "Floristic composition of the coastal district Satkhira, Bangladesh." Bangladesh Journal of Plant Taxonomy 28, no. 1 (2021): 97–124. http://dx.doi.org/10.3329/bjpt.v28i1.54211.

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This study presents elementary taxonomic data on the composition of vascular flora in the disaster prone coastal district Satkhira of Bangladesh. The results of this study show that this district houses 664 species under 468 genera and 133 families of vascular plants. The Pteridophytes and Gymnosperms are represented by 21 and five species, whereas, the Magnoliopsida (dicotyledons) and Liliopsida (monocotyledons) of Angiosperms by 494 and 144 species, respectively. About 59.64% of these species are herbs, 15.96% shrubs, 21.69% trees, 2.26% palms and 0.45% bamboos. Total 73.04% of the species are wild, 19.88% planted and 7.08% cultivated. In this area, Fabaceae with 31 species is the largest family, followed by Asteraceae with 27 species, Apocynaceae with 26 species and Malvaceae with 25 and Acanthaceae with 22 species. Ficus with seven species is recorded as the largest genus, which is followed by Solanum, Hygrophila, Euphorbia, Senna, Phyllanthus, Ipomoea, Hibiscus and Alternanthera. Most of the species are found in fallow lands, roadsides, woodlands, homesteads and scrub jungles and useful as medicine, ornamental, fibre, fruit, livestock feed, soil binder and timber. The floristic composition of this district is still rich, though most of its habitats and ecosystems are vulnerable to natural disasters. Effective conservation plan and measures should be adopted for the precious flora of this coastal district.
 Bangladesh J. Plant Taxon. 28(1): 97-124, 2021 (June)
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Bale, CL, and JB Williams. "Composition and Classification of Nothofagus moorei Communities in Northern New South Wales." Australian Systematic Botany 6, no. 5 (1993): 429. http://dx.doi.org/10.1071/sb9930429.

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Nothofagus moorei (F. Muell.) Krasser occurs disjunctly in northern New South Wales from the Barrington Tops area to just beyond the New South Wales–Queensland Border. The main centres of occurrence are areas within the Barrington Tops–Gloucester Tops, the Upper Hastings, the escarpment of the Ebor–Dorrigo Plateau, and the Border Ranges–Lamington Plateau (McPherson Range). Minor but significant stands of N. moorei occur on the Comboyne Plateau, the East Dorrigo area, and in the western McPherson Range. Throughout this range, site characteristics vary considerably, both in landscape morphology and in parent material type. The altitudinal range of N. moorei is 1000 m. Such site variability makes the disjunctness of N. moorei more problematic. The floristic composition of these communities was investigated at 60 sites scattered throughout the geographic range. More than 400 species of vascular plants were found to occur with N. moorei, including at least 50 species of climbers and more than 40 species of epiphytes and lithophytes. Around half of this floristic richness may be attributable to mixed assemblages of cool temperate and cool subtropical species, particularly at low altitude sites and rather fertile mid altitude sites. Nevertheless, it is clear there is a distinctive temperate floristic group which characterises the principal domains of N. moorei. Floristic analyses based on ordination techniques produced site clusters which at a coarse level matched the disjunct geographic domains of N. moorei. Locally, topographic gradients, geological factors, and site histories contribute to floristic dissimilarities. There is little evidence of widespread species assemblages of high fidelity. Nevertheless, some species co-occur commonly enough to offer some support to intuitive floristic classifications.
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Nsangua, Benoit Mposo, Hippollyte Nshimba Nseya, Faustin Boyemba B., Roger Katusi L., Faustin Mbayo M., and Laurianne Mbuyu M. "Etude De La Variabilite Structurale Et Floristique Des Forets Sur Terre Ferme En Chefferie De Bahema-Boga (Province De L’ituri, RDC)." European Scientific Journal, ESJ 14, no. 30 (2018): 500. http://dx.doi.org/10.19044/esj.2018.v14n30p500.

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The knowledge of the structural and floristic variability of forest is the principal tool which makes it possible to know the floristic composition of forest in an area. This paper focuses on analyzing the structural and floristic variability between compounds of forest on firm earth in chieftainship Bahema-boga in Ituri Province in Democratic Republic of Congo (DRC). The study provides knowledge and education to those responsible for environmental protection and those who are concerned with the forest based on the floristic potential for the conservation and the sustainable management of the forests. The structure and the floristic composition vary from one forest to another. The quantity of carbon stoke also vary due to the function of structures and floristic composition of forests. The forests play an important role in the reduction of CO2. The inventories of trees whose diameter is ≥ 10 cm have allowed us to collect the data to analyze this structural and floristic variability in a sample of 3 ha (plots) of forests in firm earth. The results obtained indicate that 812 inventoried individuals (trees) are extended in 16 species, 11 kinds, and 8 famillies. The total earth surface of inventoried individuals is 32,06 m2 /ha. The species of Cynometra sessiliflora dominated those forests with 408 individuals (50,25%). The diametric class of the most elevated inventoried plants are located between 10-20cm (63,17%). The family of the Fabaceae is better represented in those forests (73,65%).
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Dissertations / Theses on the topic "Reshuffling of floristic composition"

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Riofrio, Dillon Gabriela. "Évolution de l'acidité et de la disponiblité en azote des sols forestiers français au cours du 20ème siècle : une approche spatio-temporelle et multi-échelle basée sur le caractère bio-indicateur de la flore." Thesis, Paris, AgroParisTech, 2013. http://www.theses.fr/2013AGPT0042/document.

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Les activités humaines ont, depuis plus d'une centaine d'années, influencé de plus en plus fortement les cycles géochimiques contrôlant les niveaux d'acidité et de disponibilité en azote dans la nature. Les dépôts acides et azotés conduisent à une modification des conditions du milieu et notamment à des changements sensibles de la composition des communautés d'espèces végétales. L'objectif de cette thèse est de retracer l'évolution spatio-temporelle de l'acidité et de la disponibilité en azote des sols forestiers français au cours du 20ème siècle à partir du caractère bio-indicateur de la flore, à l'échelle locale ainsi globale. L'utilisation de la flore comme bio-indicateur vise à pallier l'absence de données de mesures directes des conditions édaphiques et des dépôts atmosphériques acides et azotés couvrant une large emprise spatio-temporelle. Premièrement, les variations de pH (indicateur d'acidité) et C:N (indicateur de disponibilité en azote) bio-indiquées ont été calculées à partir d'environ 100 000 relevés floristiques temporaires réalisés dans toute la France de 1910 à 2010. Elles ont été analysées par une méthode novatrice de comparaison spatio-temporelle, en différenciant les zones forestières sur substrat acide et non-acide ainsi que les forêts de conifères et de feuillus. Dans un second temps, nous avons analysé les changements des conditions édaphiques entre 1972 et 2011 à l'échelle de la forêt de Villey-Le-Sec, et ceux de la flore qu'ils induisent en lien avec d'autres évolutions environnementales, toujours à partir du caractère bio-indicateur de la flore.À l'échelle globale, nous avons observé une acidification des forêts françaises en milieu acide (-0.34 unités du pH en moyenne) et milieu non-acide (-0.19 unités du pH en moyenne), respectivement, jusqu'en 1984 et 1997. Nous avons ensuite mis en évidence, pour la première fois à notre connaissance, un arrêt dans l'acidification des sols forestiers et même une diminution de l'acidité sur substrat non-acide ainsi que un décalage temporel entre l'acidification des zones acides et non-acides. Cette évolution apparaît tout à fait cohérente avec celle connue des dépôts atmosphériques acidifiants en France depuis le début du 20ème siècle. Spatialement, nous confirmons la tendance temporelle, montrons une évolution régionalisée de l'acidification principalement sur substrat non-acide et soulignons la grande variabilité spatiale des changements de pH des sols forestiers. Concernant l'évolution de la disponibilité en azote, nous observons une diminution non attendue de celle-ci jusqu'en 1984 et 1997, respectivement, dans les forêts de conifères (+0.79 unités de C:N en moyenne) et de feuillus (+0.74 unités de C:N en moyenne). Une tendance à l'eutrophisation des sols forestiers a ensuite été observée dans les forêts de conifères et de feuillus à partir de 1997 (-0.10 et -0.16 unités de C:N en moyenne, respectivement). Cette évolution apparaît décalée par rapport à celle des dépôts azotés en France. [...] Suite et fin du résumé dans la thèse<br>Human activities have, over the last century, strongly influenced the cycles controlling the levels of acidity and nitrogen availability in nature. Acidifying and eutrophying deposition lead to a change in environmental conditions and particularly to sensitive changes in plant communities' composition.The objective of this Ph.D work is to reconstruct the spatiotemporal evolution of the acidity and nitrogen availability in French forest soils over the 20th century using the bioindicator character of plants, into local and global scales. The use of plants as bioindicator seeks to mitigate the lack of direct measurements of soil conditions and atmospheric deposition, over a wide spatiotemporal extent. First, changes in bioindicated soil pH (indicator of acidity conditions) and C:N (indicator of nitrogen availability status) were computed from approximately 100 000 temporary floristic plots carried out throughout France from 1910 to 2010. They were analyzed using an innovative method of spatiotemporal comparison, where acidic and nonacidic forest areas and coniferous and broadleaved forests were differentiated. Secondly, and always from the bioindicator character of plants, changes in soil conditions between 1972 and 2011 across Villey forest as well as floristic changes they induce related with other environmental changes were analyzed.At the global level, we observed acidification in acidic forest areas (-0.34 pH units on average) and in nonacidic areas (-0.19 pH units on average), respectively, until 1984 and 1997. We demonstrated for the first time (to our knowledge) a cessation of acidification of forest soils and even a decrease in acidity in nonacidic forest areas, as wella as a time lag for acidification between acidic and nonacidic areas. This trend is consistent with the trend of acidifying deposition in France since the early 20th century. Spatially, our results confirm the temporal trends, show a regional geographic pattern of acidification (mainly observed in nonacidic areas), and highlight the high spatial variability of soil pH changes. Concerning the evolution of nitrogen availability conditions, we observed an unexpected decrease in available nitrogen until 1984 and 1997, respectively, in coniferous (+0.79 C:N units on average) and broadleaved forests (+0.74 C:N units on average). A trend to eutrophisation of forest soils was then observed in coniferous and broadleaved forests since 1997 (-0.10 and -0.16 C:N units on average, respectively). This trend is not consistent with the trend of nitrogen atmospheric deposition in France. ”Last and final summary in the thesis.”
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SUKARDJO, Sukristijono, Akio HAGIHARA, 秋男 萩原, et al. "Floristic composition of a tropical rain forest in Indonesian Borneo." 名古屋大学農学部付属演習林, 1990. http://hdl.handle.net/2237/8669.

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Haji, Sukri Rahayu Sukmaria. "Differentiation of Dipterocarp floristic composition and species distributions in Brunei Darussalam." Thesis, University of Aberdeen, 2010. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=158320.

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This thesis investigates the influence of niche specialisation on floristic composition and species distributions of the family Dipterocarpaceae along topographic gradients at two contrasting lowland Mixed Dipterocarp Forest sites in Brunei Darussalam: Andulau (overlying nutrient-poor sandy soils) and Belalong (overlying nutrient-rich clay soils). Dipterocarp tree density, species richness and diversity were higher at Andulau than Belalong, and were also higher on ridges than in slopes and valleys. Randomisation tests detected significant dipterocarp species associations with site and tomography. Dipterocarp floristic composition was strongly correlated with various habitat variables at Belalong, even after accounting for distance between samples. In contrast, fewer habitat variables were correlated with dipterocarp floristic composition at Andulau, implying weaker habitat effects in this more topographically homogeneous site. In a field-based transplant experiment, <i>Dryobalanops aromatica </i>and <i>Dryobalanops rappa </i>seedlings consistently showed higher growth rates and survival in gaps than in understorey plots. Higher survival and leaf production of <i>D. aromatica </i>seedlings at Andulau than Belalong provide evidence of a habitat preference. Growth and survival of <i>D. rappa</i> seedlings were similar at the two sites, but <i>D. rappa</i> seedlings grew significantly faster in height than <i>D. aromatica </i>seedlings on slopes at both sites. In conclusion, local and landscape scale variations in edaphic and environmental resources influence dipterocarp species distributions and floristic composition, as well as dipterocarp seedling growth and survival. Thus, niche specialisation is an important mechanism in the maintenance of species coexistence at Andulau and Belalong.
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Tavares, Rita Cerejeira Cardoso. "Pastagens de altitude: caracterização de uma exploração na região da Guarda." Master's thesis, ISA/UL, 2014. http://hdl.handle.net/10400.5/8308.

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Mestrado em Engenharia Agronómica - Ramo Agro-pecuária - Instituto Superior de Agronomia<br>This thesis studies three different pastures -one natural (PN), one sown 30 years ago (PMA) and one sown this October (PMN)- in the Serra da Estrela (Portugal). Cages with 1m2 were placed in all three pastures. The plant material was collected from these cages three times: two in April of 2014 and one in May of 2014. The chemical composition of the biomass- dry mass, crude protein and fibre (NDF,ADF and ADL)- was analyzed in the laboratory to estimate the nutritive value of the pastures. PMN had the higher nutritive value. This higher value is due to the fertilizations done in September of 2013. PN and PMA could improve their nutritive value with some changes in the pasture utilization by animals and by correcting the pH of their soils. The results of this study indicate that Quinta do Ordonho has species with good forage potential that should be maintained.<br>Esta dissertação faz parte do projeto PRODER, medida 4.1 PA 40490 “Melhoramento de pastagens permanentes de altitude”.
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Vinceti, Barbara. "Spatial and temporal analysis of floristic composition and dynamics in some lowland Amazonian forests." Thesis, University of Edinburgh, 2003. http://hdl.handle.net/1842/14608.

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Recent research has suggested that apparently undisturbed tropical forests, remote from areas of deforestation or other significant human influences, are undergoing unexpected changes. These observed changes may already be having significant impacts on terrestrial carbon stocks, fluxes, and biodiversity. However, the findings have proved controversial, partly because a rather limited number of permanent sample plots (PSPs) have been monitored for short periods. This work is centred on tree-by-tree data collated from long-term forest PSPs from several lowland Neotropical sites, spanning a wide gradient of environmental conditions across the Amazon basin, covering variable census intervals. The aim of the analysis is to: (1) investigate the role played by the main environmental variables in determining the observed geographical patterns of rainforest floristic composition, diversity and structure, (2) characterize temporal and regional patterns of forest dynamics, and changes in forest dynamics and basal area (BA), (3) explore potential shifts in species composition over time, due to mechanisms other than natural successional processes. With regard to floristic aspects, the present work reveals that: (1) large-scale patterns in the abundance of the most important tree families are identifiable, with fast-growing families dominating in highly dynamic forest stands studied in western Amazonia (WA); (2) the number of dry months seems to be the best predictor for alpha-diversity across the sites investigated, (3) soil seems to be playing a major role in determining floristic diversity, at local scale; (4) significant structural differences exists between forests stands located in drier and wetter sites. With regard to forest dynamics and BA, the study shows that: (1) turnover is much higher in western than in central Amazonian (CA) plots, (2) stand BA and turnover appear to have been significantly increasing in the last two decades in almost all PSPs examined, regardless of environmental conditions, (3) morality and recruitment have both increased in every region, but the increase is not significant for mortality rates.
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Macaulay, Lisa Ann University of Ballarat. "The floristic composition and regeneration characteristics of Buloke (Allocasuarina luehmannii) woodland of the Wimmera, Victoria." University of Ballarat, 2006. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/12768.

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"The pre-settlement distribution and character of Wimmera Buloke woodlands are described based on historical data including early parish plans. It is suggested the open structure of these woodlands was maintained by relatively frequent fire. The floristic composition of the most intact Wimmera Buloke woodland remnants was intensively surveyed. Five floristic communities are described based on computer-based analysis of species presence data. Eight 'pre-settlement Buloke woodland types' are described based on surface soil texture categories and average annual rainfall zones. Native daisies, chenopods and shrubs are components of the understory that differentiate the 'pre-settlement Buloke woodland types'. [...] A series of experiments was undertaken with the aim of determinig the factors responsible for the paucity of Allocasuarina luehmannii regeneration in remnant Wimmera bushland."<br>Master of Applied Science
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Macaulay, Lisa Ann. "The floristic composition and regeneration characteristics of Buloke (Allocasuarina luehmannii) woodland of the Wimmera, Victoria." University of Ballarat, 2006. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/14602.

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"The pre-settlement distribution and character of Wimmera Buloke woodlands are described based on historical data including early parish plans. It is suggested the open structure of these woodlands was maintained by relatively frequent fire. The floristic composition of the most intact Wimmera Buloke woodland remnants was intensively surveyed. Five floristic communities are described based on computer-based analysis of species presence data. Eight 'pre-settlement Buloke woodland types' are described based on surface soil texture categories and average annual rainfall zones. Native daisies, chenopods and shrubs are components of the understory that differentiate the 'pre-settlement Buloke woodland types'. [...] A series of experiments was undertaken with the aim of determinig the factors responsible for the paucity of Allocasuarina luehmannii regeneration in remnant Wimmera bushland."<br>Master of Applied Science
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Manning, George. "Environmental and Biotic Processes Influencing Floristic Composition, Quality, Integrity, and Function in Tallgrass Paririe Assemblages." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1593.

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Tallgrass prairie is one of the most threatened grasslands in North America. Conservation of tallgrass prairie focuses on both effective management of remaining native prairie, and restoration of formerly cultivated fields to tallgrass prairie. This research focused on processes and properties relevant to restoration and conservation of tallgrass prairie. Community assembly theory attempts to explain the formation of communities, which can be governed by deterministic or stochastic processes, or some combination of both. Fire and grazing are widely used to manage grasslands for conservation purposes, but few studies have evaluated the effects of these drivers on the conservation value of plant communities measured by the floristic quality index (FQI). Pollination services play a vital role in the reproductive stability of the plant community in prairies, though this has not been well studied in restored prairie. The first chapter of this dissertation reports on a sequential restoration approach used to gain insights into the extent to which community assembly is deterministic and stochastic events change the trajectory of community development. The sequential restorations consisted of former agriculture fields restored to prairie, varying only in time since abandonment. Species composition and aboveground net primary production were quantified over time in sequentially restored communities to reveal the predictability of ecological restoration in producing desired communities and ecosystem functions. The sequential restoration plots were established in a block design. The same suite of species was seeded using the same seeding rates in each restoration sequence. Species composition was recorded each September in the year of seeding and each June and September in the two subsequent years for each block. Annual aboveground net primary productivity was collected from 2 randomly placed 0.1 m2 plots per subplot during peak biomass. There was a significant sequence by age interaction for sown, volunteer, and total species composition. Sown, volunteer, and total cover, diversity, and richness also were affected by a sequence by age interaction. Annual net primary production (ANPP) also was affected by a sequence by age interaction for sown and volunteer species. However, total ANPP was only affected by the variable age. Results show that interannual climate variability (specifically growing season precipitation) inhibits a priori determinations of community assembly, which suggests that stochastic processes play a significant role in the community assembly process in tallgrass prairie restoration. Variations in annual precipitation during the installation years likely drove the initial differences in species composition and ANPP. In general this study revealed that drought conditions at the time of restoration may be more deleterious than drought conditions occurring at other times post-establishment. The influence of fire and grazing on soil properties and functions is difficult for land managers and restoration practitioners to assess. Therefore, the objectives for the second study were to (i) to quantify the independent and interactive effects of grazing and fire frequency on floristic quality in native tallgrass prairie, and provide potential benchmarks for community assessment, and (ii) to explore whether floristic quality can serve as an indicator of soil structure and function for more holistic ecosystem assessments. A factorial combination of fire frequencies (1-2, 4, and 20 y return intervals) and grazing (by bison or ungrazed) treatments was sampled for plant species composition and several indicators of soil quality in lowland tallgrass prairie. Floristic quality, diversity, and richness were higher in grazed than ungrazed prairie over all fire frequencies. Available inorganic N, microbial biomass N, total soil N, and soil bulk density were also higher in grazed prairie soil over all fire frequencies. Microbial biomass C, total soil organic C, and total soil N were positively correlated with FQI. This study demonstrated that floristic quality and soil N pools are more strongly influenced by grazing than fire and that floristic quality can be an indicator of total soil C and N stocks in never cultivated lowland prairie. In tallgrass prairie, 85 – 90 % of angiosperms require an insect or other animal for pollen transfer. Restorations can play a vital role in the reestablishment of pollination services and simultaneously help maintain high levels of diversity in the tallgrass prairie ecosystem. Missed pollination, via temporal asynchronies, could have a number of biological disadvantages for a plant population. In the third study we addressed the effects of missed pollination on floral period, photosynthetic activity, leaf N content, and seed set in a common native tallgrass prairie forb, Penstemon digitalis. In each of 12 plots, 6 individual plants were either bagged to prevent pollination, or left unbagged, to allow for pollination. There was no difference in mean flower duration between netted and open plots. There was a treatment by time interaction for relative chlorophyll concentrations (P = 0.0005). Mean relative chlorophyll concentrations values at sampling times (prior to flowering; Pre, 10 days after FFD; Plus, 10 days after cessation of flowering; Post, and at the time of leaf collection; Coll) all differed from one another in bagged plots. Comparisons of relative chlorophyll concentrations values only showed a difference between bagged and open-pollinated plots at sampling time ‘Coll’. There was no difference in percent leaf N between bagged and open-pollinated plots and the amount of seed set in bagged plots was significantly lower than the amount of seed set in the open-pollinated plats. Any disruption to plant-pollinator interactions can create temporal asynchronies, however, the impact of those asynchronies is equivocal.
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Pinto, Maria do Socorro de Caldas. "Floristic survey and chemical-bromatologic composition of the herbaceous stratum in areas of Quixelo and Taua, Ceara State." Universidade Federal do CearÃ, 2008. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4709.

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FundaÃÃo de Amparo à Pesquisa do Estado do CearÃ<br>Foi realizado o levantamento florÃstico do componente herbÃcio em cinco sÃtios ecolÃgicos dos municÃpios de Tauà e QuixelÃ, CearÃ, objetivando conhecer as espÃcies de maior ocorrÃncia e com potencial forrageiro atravÃs da determinaÃÃo da composiÃÃo bromatolÃgica e fraÃÃes que compÃem os compostos nitrogenados e carboidratos e estimativa dos nutrientes digestÃveis totais (NDT). Em Ãrea de aproximadamente 1 ha, para cada sÃtio, foram amostrados 20 pontos nos sÃtios I, II, IV e V e 10 pontos no III utilizando-se moldura retangular com dimensÃo de 1,45 x 0,70 m. Nestes pontos foi determinado a bobertura do solo, contadas as plantas vivas que se encontravam dentro da moldura, em seguida separadas por espÃcie e identificadas botanicamente<br>Floristic survey was conducted of the component herbaceus in five ecological sites in the municipalities of Taua and Quixelo, Ceara, to ascertain the species of higher occurrence and a potential forage through the dete rmination of chemical bromatol ogic and fractions that make up the nitrogen compounds and carbohydrates a nd of estimate total digestible nutrients (TDN). In area of about 1ha for each site, were sampled 20 points in site s I, II, IV and V and 10 points in the III using a rectangular frame w ith dimension of 1.45 x 0.70 m. In these points was determined to coverege the soil, counted li ve plants which were within the frame, then separated by species an d identified botany. The floristic para meters the stratum herbaceous evaluated were: number of families, genera, sp ecies and individuals, frequency of families and species, percentage of the aggregate inde x IGA, diversity estimated by index of Shannon- Wiener (H '), dominance by Simpson ( C), samp le sufficiency, absolute density (AD) and relative density (RD). Were determined the le vels dry matter (DM), crude protein (CP), ash (MM), organic matter (OM), stratum ether (EE) , neutral detergent fiber (NDF) and acid detergent fiber (ADF). The data on chemical-bromatologic composition were submitted to descriptive and multivariate analysis, with gr ouping of areas two step clustering using the SAS statistical package. It was determined the fraction A of the nitrogen compounds, B1 fraction, fraction B3, fraction C and B2 frac tion determined by the difference between the total nitrogen and the fractions A, B1, B3 and C. The carbohydrates tota l, C fraction, fraction B2 and the fractions of carbohydrates with high rates of degradation rumen (A+B1). We used the equations of the NRC (2001) for prediction of the energy value and calculate the ED, EM P and EL L . The flora herbaceous ecological in the fi ve sites was represented by 22 families, 47 genera and 54 species, totali ng 16.679 individuals. The numb er of parcels was enough to estimate the reality of floristic composition, as evidenced by the no entry of new species in ecological sites. The diversity for sites I, II, III, IV and V was 0.98, 0.92, 0.94, 0.94 and 0.97 nats/individuals for the index of Shannon-Wi ener (H ') and of 0.87, 0.97, 0.95, 0.85 and 0.86 nats/individuals for the index of dominance by Simpson (C), thus showing, low floristic diversity. The pattern of dist ribution was uniform for the si tes II, III, IV and V with xvi percentages of 88, 100, 96.55 and 1 00%, respectively. The ecological site I with 90.63% of the plant community has tended to group together . For the chemical composition of the result of clustering analysis allowed the formation of three distinct groups: sites I and IV (in the municipalities of Quixelo and Ta ua); sites II and III (Quixelo) and ecological site V (Taua). The ordination of five ecological sites based on the correlation of levels DM, MM, EE, CP, NDF and ADF. There was significant effect (P <0.01) for all variables within each ecological site. There was wide variation in chemical composition, with levels ranging from DM 5 to 85% , CP 6 to 22% , EE 2.4 to 12% , NDF from 36 to 90%, FDA from 22.5 to 49 , 5% for MM and more than 40% of the species showed an average of 10% in MS. For fraction A (non-protein nitrogen - NNP) of nitrogen compounds were obt ained values of 56.66% to 77.46% - Waltheria indica L. for the Macroptilium lathyroides (L) Urb. Aeschynomene rudis Benth and Stylosanthes humilis Kunth. presented, respectively, over fraction of B1 (14.13 and 19.41%) compared with other avaluated species. For the B2 fraction values of ranged from 34.06 and 32.21% for Paspalum conspersum Schrad and Waltheria indica L. respectively. The B3 fraction ranged from 0.62 to 25.70%, Waltheria indica L and Ipomoeaea hederifolia L, respectively. The C fraction of nitrogen was lower for the cenchrus equinatus (0.75%), followed by Ipomoea grandifolia (Dammer) O' Donell (1.13 %). In fractionation of carbohydrates, it was observed that th e fraction C ranged 13.49 to 52.90% for Ipomoea grandifolia (Dammer) O' Donell and Wissadula subpeltata (Kuntze) R. E. Fr, respectively. For Eragrostis pilosa (L.) P. Beauv and Senna obtusifolia (l.) H. S. Irwin & Barneby, values for the fraction A+B1, were 0.74 to 52.79%. The Macroptilium lathyroides (L) Urb., Senna obtusifolia (l.) H. S. Irwin & Barneby, Ipomoeaea hederifolia L., and Ipomoea grandifolia (Dammer) O' Donell were 82.41, 84.95, 84.07 and 86.50% of their carbohydrates in the form of fraction A+B1+B2. The energy values es timated to TDN, DE, ELL and EMP, it was observed for the Ipomoea grandifolia (Dammer) O' Donell 78.96%, 3.45, 3.08 and 1.94 Mcal/kg, respectively Macroptilium lathyroides (L) Urb 69.00%; 2.78, 2.37, 1.47 Mcal/kg, Senna obtusifolia (L.) H. S. Irwin & Barne by 67.86%, 2.94, 2.53 and 1.59 Mcal/kg, respectively, Aeschynomene rudis Benth. 65.71%, 2.94, 2.53 resp ectively and 1.59 Mcal/kg and Stylosanthes humilis Kunth. 64.82%, 2.90, 2.49 and 1.56 Mcal /kg showed higher values for other pecies. The soil covering by biomass the herbaceous stratum of the sites ecological shows wide variation. The families most fre quently in ecological sites evaluated are Commelinaceae, Convolvulaceae, Euforbiaceae, Leguminoseae, Malvaceae, PortulacÃcea, Poaceae and Rubiaceae . The environments studied have lo w floristic diversity. There was a uniform predominance of distribution of species in four of the sites surveyed, where only one of five sites ecological species were tendi ng to group. Most of the analyzed species, with relationship to the bromatologyc-composition, has potential for the use as forage. The conservation of the spare materi al during the rainy period can supply the protein deficiency and available fiber and to promote the mainte nance of the pattern of fermentation of the rumen, improving performance of ruminant ones in the period of forage shortage. The fractionation of carbohydrates and protein are analysis simple, not expensive and must be carried out in all feed for ruminants. The use of equations of the NRC (2001) to predict the energy values of foods was appropr iate for the conditions of this research, there is a need for validation for these species of caatinga
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Scholtz, Martin A. G. "The possible effect of fire on the structural and floristic composition of Afromontane forest on the Cape Peninsula." Thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/26661.

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Books on the topic "Reshuffling of floristic composition"

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Risvold, Ann M. Community composition and floristic relationships in montane wetlands in the North Cascades, Washington. Northwest Scientific Association, 2001.

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Pascal, J. P. Wet evergreen forests of the Western Ghats of India: Ecology, structure, floristic composition and succession. Institut français de Pondichéry, 1988.

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Wells, T. C. E. The long-term effects of cutting on the yield, floristic composition and soil nutrient status of chalk grassland. English Nature, 1993.

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Mueck, S. G. Management of eucalypt regrowth in East Gippsland: The floristic composition of dry, damp, and lowland sclerophyll forests in East Gippsland. Dept. of Conservation & Environment, Flora & Fauna Division, 1990.

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Poitras, April A. The impact of careful logging on the floristic composition of black spruce, Picea mariana (Mill.) B.S.P., stands of the lake Abitibi model forest. Laurentian University, Department of Biology, 1996.

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Thomaz, Luciana Dias. Composição florística da Mata Atlântica de encosta da Estação Biológica de Santa Lúcia, município de Santa Teresa-ES =: Atlantic forest floristic composition for the slopes of the Santa Lúcia Biological Station, municipality of Santa Teresa-ES. Ministério da Cultura, Instituto do Patrimônio Histórico e Artístico Nacional, Museu de Biologia Prof. Mello Leitão, 1997.

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Tree population studies in the Lower Montane Forest, Malaysia: Preliminary result on floristic composition and stand structure. WWF Malaysia, 1998.

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Frazer, Anne M. Ecology and floristic composition of the vine assemblages of pineland and dry evergreen forest (coppice) communities on North Andros Island, Bahamas. 1995.

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Mackey, Brendan, David Lindenmayer, Malcolm Gill, Michael McCarthy, and Janette Lindesay, eds. Wildlife, Fire and Future Climate. CSIRO Publishing, 2002. http://dx.doi.org/10.1071/9780643090040.

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The conservation of Earth's forest ecosystems is one of the great environmental challenges facing humanity in the 21st century. All of Earth's ecosystems now face the spectre of the accelerated greenhouse effect and rates of change in climatic regimes that have hitherto been unknown. In addition, multiple use forestry – where forests are managed to provide for both a supply of wood and the conservation of biodiversity – can change the floristic composition and vegetation structure of forests with significant implications for wildlife habitat.&#x0D; Wildlife, fire and future climate: a forest ecosystem analysis explores these themes through a landscape-wide study of refugia and future climate in the tall, wet forests of the Central Highlands of Victoria. It represents a model case study for the kind of integrated investigation needed throughout the world in order to deal with the potential response of terrestrial ecological systems to global change. The analyses presented in this book represent one of the few ecosystem studies ever undertaken that has attempted such a complex synthesis of fire, wildlife, vegetation, and climate.&#x0D; Wildlife, fire and future climate: a forest ecosystem analysis is written by an experienced team of leading world experts in fire ecology, modelling, terrain and climate analysis, vegetation and wildlife habitat. Their collaboration on this book represents a unique and exemplary, multi-disciplinary venture.
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Book chapters on the topic "Reshuffling of floristic composition"

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Onipchenko, V. G. "Alpine plant communities: syntaxonomy, floristic composition and richness." In Alpine Ecosystems in the Northwest Caucasus. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2383-5_4.

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Musa, Nor Lailatul Wahidah, Liliwirianis Nawi, Nurun Nadhirah Md Isa, and Jumaat Adam. "Study on the Floristic Composition and Forest Structure of Heath Forest at Dungun Area in Terengganu." In Proceedings of the International Conference on Science, Technology and Social Sciences (ICSTSS) 2012. Springer Singapore, 2014. http://dx.doi.org/10.1007/978-981-287-077-3_80.

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Teketay, D. "Floristic composition of Gara Muleta and Kundudo mountains, south-eastern Ethiopia: implications for the conservation of biodiversity." In The Biodiversity of African Plants. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0285-5_47.

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Davies, Stuart J., Nur Supardi Md Noor, James V. LaFrankie, and Peter S. Ashton. "The Trees of Pasoh Forest: Stand Structure and Floristic Composition of the 50-ha Forest Research Plot." In Pasoh. Springer Japan, 2003. http://dx.doi.org/10.1007/978-4-431-67008-7_3.

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"species composition [n], anthropogenic shift in floristic." In Encyclopedic Dictionary of Landscape and Urban Planning. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-76435-9_13458.

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"shift [n] in floristic species composition, anthropogenic." In Encyclopedic Dictionary of Landscape and Urban Planning. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-76435-9_12720.

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"anthropogenic shift [n] in floristic species composition." In Encyclopedic Dictionary of Landscape and Urban Planning. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-76435-9_494.

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"floristic species composition [n], anthropogenic shift in." In Encyclopedic Dictionary of Landscape and Urban Planning. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-76435-9_4858.

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Gentry, Alwyn H. "Diversity and floristic composition of neotropical dry forests." In Seasonally Dry Tropical Forests. Cambridge University Press, 1995. http://dx.doi.org/10.1017/cbo9780511753398.007.

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Okou, Farris, Achille Assogbadjo, and Brice Augustin Sinsin. "The Impacts of Soil Degradation Effects on Phytodiversity and Vegetation Structure on Atacora Mountain Chain in Benin (West Africa)." In Soil Erosion - Current Challenges and Future Perspectives in a Changing World [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93899.

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Atacora mountain is a particular ecosystem of West Africa where soil degradation occurs. The present study assessed the impacts of physical soil degradation on vegetation in the Beninese portion of this mountain chain. Phytosociological surveys were carried out along line transects from plain to summit within 22 plots of 30 m x 30 m. Based on indicators of physical soil degradation each plot was classified into one soil degradation class (Light, Moderate, High or Extreme). Impacts on plant diversity were assessed by comparing the floristic composition of soil degradation classes with the index of similarity of Jaccard. Variations between soil degradation classes of species richness, species chorological types, species life forms and species dispersal were also tested using a discriminant analysis combined with ANOVA. The Multi-Response Permutation Procedures analysis was used to pairwise compare the soil degradation classes based on the cover data of the species lists. All soil degradation classes were dissimilar, depending on the floristic composition. Discriminant analysis and ANOVA performed on biodiversity indicators had shown that species richness, and the number of regional species, phanerophytes and sarcochory decreased along the increasing degradation gradient in contrast to the number of species with wide distribution, therophytes and sclerochory. With regard to vegetation structure, the results had shown that only moderately and highly degraded soils presented the similar vegetation type. Physical soil degradation induced modification of floristic composition, phytodiversity loss and modification of vegetation structure. These results showed that the soil degradation gradient corresponds to a vegetation disturbance gradient.
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Conference papers on the topic "Reshuffling of floristic composition"

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Smith, P. S. D., D. G. Bowers, and E. G. Mitchelson-Jacob. "Optical determination of phytoplankton floristic composition." In Ocean Optics XIII, edited by Steven G. Ackleson and Robert J. Frouin. SPIE, 1997. http://dx.doi.org/10.1117/12.266498.

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Telesnina, V. M. "Dynamic of vegetation composition and structure due to post-agrogenic succession (Kostroma region)." In Problems of studying the vegetation cover of Siberia. TSU Press, 2020. http://dx.doi.org/10.17223/978-5-94621-927-3-2020-37.

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The rate and direction of the post-agrogenic succession are determined by the features of agricultural land development in the past. After intensive application of organic fertilizers, as well as cattle grazing, the restoration of woody vegetation slows down, as well as the rate of appearance of forest species resistant to acidic conditions and low enrichment in nutrient elements in the grass. With the intensive application of organic fertilizers, nitrophilic herbal phytocenoses with low floristic diversity exist for a long time. Prolonged haying causes a reduction in the weed-ruderal stage while slowing down the appearance of forest species. At the initial stages of overgrowing for all types of use, the convergence of a number of floristic and ecological-coenotic characteristics of phytocenoses of deposits of a similar age was revealed in the past.
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Teberdiev, D. M., A. V. Rodionova, and S. A. Zapivalov. "Changes in yield and botanical composition depending on management systems for long-term haymaking." In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-141.

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The influence of technological systems on yield and floristic composition of agrophytocenosis under long-term use conditions (72-74) is evaluated. The features of successional variability of agrophytocenoses depending on the level of nutrition of long-term haymaking are revealed.
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Mehmeti, Arben. "IMPACT OF CHEMICAL AND MECHANICAL WEED CONTROL ON THE FLORISTIC COMPOSITION IN POTATO CROP." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b51/s20.054.

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Krasniqi, Elez. "FLORISTIC COMPOSITION OF THE FORESTS OF CICAVICA MASSIF MOUNTAIN (SOUTHWESTERN PART)-REPUBLIC OF KOSOVO." In 14th SGEM GeoConference on WATER RESOURCES. FOREST, MARINE AND OCEAN ECOSYSTEMS. Stef92 Technology, 2014. http://dx.doi.org/10.5593/sgem2014/b32/s14.048.

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Galleguillos, M., J. Ulloa-Pino, N. Munoz-Toro, and J. F. Perez-Quezada. "Actual evapotranspiration and its relation with floristic composition and topographical features in an arid watershed." In IGARSS 2014 - 2014 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2014. http://dx.doi.org/10.1109/igarss.2014.6947235.

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Krasniqi, Elez. "FLORISTIC COMPOSITION ON THE FORESTS AND SHRUBS FORMATIONS FROM SERPENTINE TERRAINS OF BADOVC-REPUBLIC OF KOSOVO." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b32/s14.063.

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Mehmeti, Arben. "IMPACT OF CHEMICAL AND MECHANICAL WEED CONTROL ON THE FLORISTIC COMPOSITION AND BIOMASS PRODUCTION IN MAIZE CROP." In 14th SGEM GeoConference on ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION. Stef92 Technology, 2014. http://dx.doi.org/10.5593/sgem2014/b51/s20.049.

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Krasniqi, Elez. "FLORISTIC COMPOSITION ON THE FORESTS AND SHRUBS OF GOLESHI MOUNTAIN INCLUDING THE SURROUNDING AREA-REPUBLIC OF KOSOVO." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b32/s14.064.

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Standish, Rachel, Tim Morald, John Koch, Richard Hobbs, and Mark Tibbett. "Restoring Jarrah Forest after Bauxite Mining in Western Australia — The Effect of Fertilizer on Floristic Diversity and Composition." In Third International Seminar on Mine Closure. Australian Centre for Geomechanics, Perth, 2008. http://dx.doi.org/10.36487/acg_repo/852_67.

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