Relevant bibliographies by topics / Dryland communitirs

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Dryland communitirs'

Author: Grafiati
Published: 19 February 2023
Last updated: 20 February 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Dryland communitirs.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Dryland communitirs"

1

Panigada, Cinzia, Giulia Tagliabue, Eli Zaady, et al. "A new approach for biocrust and vegetation monitoring in drylands using multi-temporal Sentinel-2 images." Progress in Physical Geography: Earth and Environment 43, no. 4 (2019): 496–520. http://dx.doi.org/10.1177/0309133319841903.

Full text
Abstract:
Drylands, one of the planet’s largest terrestrial biomes, are suggested to be greatly threatened by climate change. Drylands are usually sparsely vegetated, and biological soil crusts (biocrusts) – that is, soil surface communities of cyanobacteria, mosses and/or lichens – can cover up to 70% of dryland cover. As they control key ecosystem processes, monitoring their spatial and temporal distribution can provide highly valuable information. In this study, we examine the potential of European Space Agency’s (ESA) Sentinel-2 (S2) data to characterize the spatial and temporal development of biocr
APA, Harvard, Vancouver, ISO, and other styles
2

Meloni, Fernando, Berta F. Civieta, Juan A. Zaragoza, María Lourdes Moraza, and Susana Bautista. "Vegetation Pattern Modulates Ground Arthropod Diversity in Semi-Arid Mediterranean Steppes." Insects 11, no. 1 (2020): 59. http://dx.doi.org/10.3390/insects11010059.

Full text
Abstract:
The ecological functioning of dryland ecosystems is closely related to the spatial pattern of the vegetation, which is typically structured in patches. Ground arthropods mediate key soil functions and ecological processes, yet little is known about the influence of dryland vegetation pattern on their abundance and diversity. Here, we investigate how patch size and cover, and distance between patches relate to the abundance and diversity of meso-and microarthropods in semi-arid steppes. We found that species richness and abundance of ground arthropods exponentially increase with vegetation cove
APA, Harvard, Vancouver, ISO, and other styles
3

Eldridge, David J., Fernando T. Maestre, Terry B. Koen, and Manuel Delgado-Baquerizo. "Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands." Journal of Biogeography 45, no. 12 (2018): 2803–14. http://dx.doi.org/10.1111/jbi.13456.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Maestre, Fernando T., Roberto Salguero-Gómez, and José L. Quero. "It is getting hotter in here: determining and projecting the impacts of global environmental change on drylands." Philosophical Transactions of the Royal Society B: Biological Sciences 367, no. 1606 (2012): 3062–75. http://dx.doi.org/10.1098/rstb.2011.0323.

Full text
Abstract:
Drylands occupy large portions of the Earth, and are a key terrestrial biome from the socio-ecological point of view. In spite of their extent and importance, the impacts of global environmental change on them remain poorly understood. In this introduction, we review some of the main expected impacts of global change in drylands, quantify research efforts on the topic, and highlight how the articles included in this theme issue contribute to fill current gaps in our knowledge. Our literature analyses identify key under-studied areas that need more research (e.g. countries such as Mauritania, M
APA, Harvard, Vancouver, ISO, and other styles
5

Wang, Jianming, Chen Chen, Jingwen Li, Yiming Feng, and Qi Lu. "Different ecological processes determined the alpha and beta components of taxonomic, functional, and phylogenetic diversity for plant communities in dryland regions of Northwest China." PeerJ 6 (January 10, 2019): e6220. http://dx.doi.org/10.7717/peerj.6220.

Full text
Abstract:
Drylands account for more than 30% of China’s terrestrial area, while the ecological drivers of taxonomic (TD), functional (FD) and phylogenetic (PD) diversity in dryland regions have not been explored simultaneously. Therefore, we selected 36 plots of desert and 32 plots of grassland (10 × 10 m) from a typical dryland region of northwest China. We calculated the alpha and beta components of TD, FD and PD for 68 dryland plant communities using Rao quadratic entropy index, which included 233 plant species. Redundancy analyses and variation partitioning analyses were used to explore the relative
APA, Harvard, Vancouver, ISO, and other styles
6

Tooth, Stephen, and Terence S. McCarthy. "Wetlands in drylands: geomorphological and sedimentological characteristics, with emphasis on examples from southern Africa." Progress in Physical Geography: Earth and Environment 31, no. 1 (2007): 3–41. http://dx.doi.org/10.1177/0309133307073879.

Full text
Abstract:
Wetlands are poorly documented features of many landscapes, and there is often little understanding of the geomorphological controls on their origin, development and characteristics. This paper addresses the apparent paradox of wetlands in drylands, focusing particularly on the geomorphology and sedimentology of wetlands in southern Africa. Drylands are characterized by high (but variable) levels of aridity, reflecting low ratios between precipitation and potential evapotranspiration, so wetlands can only exist where there are locally positive surface water balances for all or part of the year
APA, Harvard, Vancouver, ISO, and other styles
7

Maestre, Fernando T., Manuel Delgado-Baquerizo, Thomas C. Jeffries, et al. "Increasing aridity reduces soil microbial diversity and abundance in global drylands." Proceedings of the National Academy of Sciences 112, no. 51 (2015): 15684–89. http://dx.doi.org/10.1073/pnas.1516684112.

Full text
Abstract:
Soil bacteria and fungi play key roles in the functioning of terrestrial ecosystems, yet our understanding of their responses to climate change lags significantly behind that of other organisms. This gap in our understanding is particularly true for drylands, which occupy ∼41% of Earth´s surface, because no global, systematic assessments of the joint diversity of soil bacteria and fungi have been conducted in these environments to date. Here we present results from a study conducted across 80 dryland sites from all continents, except Antarctica, to assess how changes in aridity affect the comp
APA, Harvard, Vancouver, ISO, and other styles
8

Seddon, Julian A., Andre Zerger, Stuart J. Doyle, and Sue V. Briggs. "The extent of dryland salinity in remnant woodland and forest within an agricultural landscape." Australian Journal of Botany 55, no. 5 (2007): 533. http://dx.doi.org/10.1071/bt06100.

Full text
Abstract:
Dryland salinity is considered a significant and increasing threat to sustainable land management and biodiversity across large parts of temperate Australia. However, there is little information on the extent of this threat to terrestrial ecosystems in south-eastern Australia. This paper provides a quantitative assessment of the extent of dryland salinity in remnant native woody vegetation in the agriculture-dominated landscape of the Boorowa Shire located in the South West Slopes bioregion of south-eastern Australia. The amount and type of native woody vegetation in the Boorowa Shire affected
APA, Harvard, Vancouver, ISO, and other styles
9

deCastro-Arrazola, Indradatta, Joaquín Hortal, Marco Moretti, and Francisco Sánchez-Piñero. "Spatial and temporal variations of aridity shape dung beetle assemblages towards the Sahara desert." PeerJ 6 (September 20, 2018): e5210. http://dx.doi.org/10.7717/peerj.5210.

Full text
Abstract:
BackgroundAssemblage responses to environmental gradients are key to understand the general principles behind the assembly and functioning of communities. The spatially and temporally uneven distribution of water availability in drylands creates strong aridity gradients. While the effects of spatial variations of aridity are relatively well known, the influence of the highly-unpredictable seasonal and inter-annual precipitations on dryland communities has been seldom addressed.AimsHere, we study the seasonal and inter-annual responses of dung beetle (Coleoptera, Scarabaeidae) communities to th
APA, Harvard, Vancouver, ISO, and other styles
10

Genderjahn, Steffi, Simon Lewin, Fabian Horn, Anja M. Schleicher, Kai Mangelsdorf, and Dirk Wagner. "Living Lithic and Sublithic Bacterial Communities in Namibian Drylands." Microorganisms 9, no. 2 (2021): 235. http://dx.doi.org/10.3390/microorganisms9020235.

Full text
Abstract:
Dryland xeric conditions exert a deterministic effect on microbial communities, forcing life into refuge niches. Deposited rocks can form a lithic niche for microorganisms in desert regions. Mineral weathering is a key process in soil formation and the importance of microbial-driven mineral weathering for nutrient extraction is increasingly accepted. Advances in geobiology provide insight into the interactions between microorganisms and minerals that play an important role in weathering processes. In this study, we present the examination of the microbial diversity in dryland rocks from the Ts
APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Dryland communitirs"

1

Tjoe, Yenny. "Sustaining Livelihoods: An Analysis of Dryland Communities in West Timor, Indonesia." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/366775.

Full text
Abstract:
What enables a community to cope with stress, to recover from trauma, and to provide the next generation with the opportunity for a sustainable livelihood? What makes a community vulnerable to, and lack the capacity to sustain livelihoods? This thesis is a case study of three subsistence communities in semi-arid West Timor, Indonesia, that belong to the Atoin Meto tribal group. While climatic hazards can leave a community vulnerable, there are other underlying factors, particularly in rural West Timor, where the societal structure has failed to protect all members of the society adequately. Th
APA, Harvard, Vancouver, ISO, and other styles
2

Okia, Clement A. "Balanites aegyptiaca : a resource for improving nutrition and income of dryland communities in Uganda." Thesis, Bangor University, 2010. https://research.bangor.ac.uk/portal/en/theses/balanites-aegyptiaca-a-resource-for-improving-nutrition-and-income-of-dryland-communities-in-uganda(f198715e-bc67-4a66-a3da-238c7c5c2847).html.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Joel, Abraham. "Surface runoff : a water source for poor farming communities in drylands /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/avh/2000/91-576-5753-X.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Tatsumi, Chikae. "Nitrogen cycling driven by soil microbial communities in exotic black locust plantations and native oak forests in the drylands of East Asia." Kyoto University, 2020. http://hdl.handle.net/2433/253313.

Full text
Abstract:
Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第22477号<br>農博第2381号<br>新制||農||1074(附属図書館)<br>学位論文||R2||N5257(農学部図書室)<br>京都大学大学院農学研究科森林科学専攻<br>(主査)准教授 舘野 隆之輔, 教授 北島 薫, 教授 德地 直子<br>学位規則第4条第1項該当
APA, Harvard, Vancouver, ISO, and other styles
5

Mutandi, Robson. "Locally-evolved knowledge in livestock and range management systems in southern Zimbabwe's drylands, a study of pastoral communities in beitbridge district." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0009/NQ30634.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Capon, Samantha Jane, and n/a. "Flow Variability and Vegetation Dynamics in a Large Arid Floodplain: Cooper Creek, Australia." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040513.110733.

Full text
Abstract:
Throughout arid and semi-arid inland Australia, many extensive floodplains occur in association with rivers which are amongst the most hydrologically variable in the world. As rainfall in these areas is characteristically low and patchy, conditions in Australia's 'dryland' floodplains fluctuate unpredictably between extended periods of drought and huge floods that transform vast areas into wetlands, often for months at a time. Vegetation in these floodplains is commonly dominated by short grass and forb associations and patches of open succulent shrubland which are attributed with high ecolo
APA, Harvard, Vancouver, ISO, and other styles
7

Capon, Samantha Jane. "Flow Variability and Vegetation Dynamics in a Large Arid Floodplain: Cooper Creek, Australia." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366451.

Full text
Abstract:
Throughout arid and semi-arid inland Australia, many extensive floodplains occur in association with rivers which are amongst the most hydrologically variable in the world. As rainfall in these areas is characteristically low and patchy, conditions in Australia's 'dryland' floodplains fluctuate unpredictably between extended periods of drought and huge floods that transform vast areas into wetlands, often for months at a time. Vegetation in these floodplains is commonly dominated by short grass and forb associations and patches of open succulent shrubland which are attributed with high ecolo
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Dryland communitirs"

1

Pushpamma, P. Sorghum as food in the semi-arid tropics: Studies in the dryland communities of Andhra Pradesh, India. International Development Research Centre, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Urban forestry and urban greening in drylands - Improving resilience, health, and wellbeing of urban communities. FAO, 2022. http://dx.doi.org/10.4060/cc2065en.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Wangui, Edna. Adaptation to Current and Future Climate in Pastoral Communities Across Africa. Oxford University Press, 2018. http://dx.doi.org/10.1093/acrefore/9780190228620.013.604.

Full text
Abstract:
Pastoralists around the world are exposed to climate change and increasing climate variability. Various downscaled regional climate models in Africa support community reports of rising temperatures as well as changes in the seasonality of rainfall and drought. In addition to climate, pastoralists have faced a second exposure to unsupportive policy environments. Dating back to the colonial period, a lack of knowledge about pastoralism and a systemic marginalization of pastoral communities influenced the size and nature of government investments in pastoral lands. National governments prioritize
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Dryland communitirs"

1

Bekele, Melaku, Habtemariam Kassa, and Christine Padoch. "Diminishing Status of Land Rights of Communities in Dry Lowland Areas and Their Implications: The Case of Ethiopia." In Dryland Forests. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-19405-9_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Pointing, Stephen B. "Hypolithic Communities." In Biological Soil Crusts: An Organizing Principle in Drylands. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30214-0_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Rosentreter, Roger, David J. Eldridge, Martin Westberg, Laura Williams, and Martin Grube. "Structure, Composition, and Function of Biocrust Lichen Communities." In Biological Soil Crusts: An Organizing Principle in Drylands. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30214-0_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Mutimukuru-Maravanyika, Tendayi, Lazarus Chapungu, and Felix Majeke. "Food Systems in Dryland Communities: Challenges and Opportunities in Gutu District, Masvingo Province, Zimbabwe." In Climate Change Adaptations in Dryland Agriculture in Semi-Arid Areas. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7861-5_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Rosen, Arlene. "Resilience at the Edge: Strategies of Small-Scale Societies for Long-Term Sustainable Living in Dryland Environments." In Perspectives on Public Policy in Societal-Environmental Crises. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94137-6_11.

Full text
Abstract:
AbstractModern Western communities have much to learn from the ways in which small-scale societies have survived and even thrived while cycling through phases of profoundly shifting moist to dry environmental conditions. In doing so, these small communities display a resilience developed from thousands of years of being rooted in what Western Society considers ‘marginal’ environments. The most important of the solutions they developed are sustainably rooted in deep-time and identifiable in archaeological records. The ability to live sustainably in these kinds of challenging environments emerges from a profound and long-term reservoir of ‘Traditional Ecological Knowledge’ that includes a keen awareness of the interface between human needs and natural processes. Although these traditional solutions may not apply to massive complex systems that drive the survival of large cities as a whole, we can benefit a great deal from the study of these past societies to help generate ideas for smaller segments and sub-systems of larger cities, such as neighborhood collectives, urban gardening, water conservation methods, and others that will lead us towards a more sustainable existence on our planet through the use ground-up solutions.
APA, Harvard, Vancouver, ISO, and other styles
6

Bitew, Getnet, Alebel Melaku, and Haileyesus Gelaw. "The Impact of the Expansion of Large-Scale Agriculture in Drylands of Ethiopia; Implications for Sustainable Natural Resources Management." In Environmental Sciences. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108705.

Full text
Abstract:
Dryland areas in Ethiopia encompass pastoral and agro-pastoral areas in the country and have long been regarded as peripheries especially in economic terms. Expansion of large-scale agricultural investments (land grabbing) in these areas is the current government’s focus and resulting in the loss and unsustainable utilization of natural resources. For instance, foreign investment in Ethiopia’s forestry sector is currently limited, but agricultural investments that affect forests largely through forest clearing are common in the country. Therefore, the objective of this review paper looks at the impact of large-scale agricultural investment expansions on natural resources and factors affecting it in drylands of Ethiopia. A literature search was conducted through the use of different search engines to organize this paper. Natural resource degradations such as rangelands fragmentation, soil salinity, water scarcity, deforestation, and seasonal wildlife migrations are the main problems resulting from large agricultural investments in dryland areas of Ethiopia. Government policies, climate variability and the weakening of customary rules are the main factors causing natural resources degradation in dryland Ethiopia. Large agricultural expansion investment in dryland areas of Ethiopia is currently affecting not only natural resources but also cannot improve people’s livelihood by far. Given the key roles forests play in rural livelihoods, new tenure arrangements will have significant implications for communities located at the forest farm interface in its dryland areas. Therefore, development of sound strategic policy that contributes to environmentally more sustainable and socially inclusive large-scale agricultural expansion in dryland areas of Ethiopia should be recommended.
APA, Harvard, Vancouver, ISO, and other styles
7

T. Sewando, Ponsian. "Efficacy of Risk Reducing Diversification Portfolio Strategies among Agro-Pastoralists in Semi-Arid Area: A Modern Portfolio Theory Approach." In Agrometeorology. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.94133.

Full text
Abstract:
Agro-pastoralists in the tropical semi-arid dryland areas of sub-Saharan Africa are significantly affected by climate change and variability. The agro-pastoral families are coping with production-related climatic risks through livelihood diversification to ensure food security. Data were collected from a sample of 411 agro-pastoralists across five districts in the semi-arid northern and central regions of Tanzania through survey conducted between November 2017 and July 2018. Secondary data regarding crop yields and livestock populations for eight years from 2009 to 2017 were collected from the National Bureau of Statistics and the respective District offices. Results show that about three-quarters of the agro-pastoralists managed diversified crop and livestock portfolios with two or more crops and animal species. However, simulated crop yields reveal positive correlations. Construction of integrated portfolios that generate good returns at a modest risk can be achieved through strategic choices between high-return high-risk and low-return low-risk crop and livestock activities. Thus, the paper recommends for costly long-term breeding and genotype improvement programs, strategically changing the make-up of the current crop and livestock portfolios which appear to be an affordable and tailored solution for building risk resilience among agro-pastoral communities in the drylands.
APA, Harvard, Vancouver, ISO, and other styles
8

Wilby, Andrew, and Bertrand Boeken. "The Impact of Animals on Species Diversity in Arid-Land Plant Communities." In Biodiversity in Drylands. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195139853.003.0017.

Full text
Abstract:
There are many mechanisms whereby animal activity can directly or indirectly influence the species diversity of plant communities. Most obviously, herbivory can influence the species composition directly through plant mortality or indirectly by changing the outcome of interspecific competition (Hulme 1996). Animals may also affect plant species composition by modifying the physical structure of the environment such that the flow of resources required for plant growth is altered. Such physical effects mediated by the physical structure of the environment have been termed ‘ecosystem engineering’ (defined in table 11.1; Jones et al. 1994, 1997, Lawton 1994, Lawton and Jones 1995). Animals may have other functions that influence the persistence of populations (e.g., pollination) or the colonization of new sites (seed dispersal). In this chapter we aim to provide an overview of how these diverse effects of animals influence plant species diversity, and to this end, we propose community assembly theory as a conceptual framework. Community assembly theory provides us with a schematic representation of the vital steps involved in the determination of species presence or absence at a particular site. By asking how might animal activity influence each of the steps of assembly, we ensure a comprehensive outlook on how animals affect plant species diversity. That said, we restrict ourselves in this chapter to ecological mechanisms and we do not consider evolutionary effects that are of undoubted importance at higher levels of spatial and temporal scales. Following our discussion of animal effects on community assembly, we highlight two case studies of herbivores arising from recent research in Israel. We use insights provided by these examples to suggest mechanisms that are likely to be of particular importance in arid ecosystems. For example, we suggest that since the flow of water, the primary limiting factor in these systems, is so easily influenced by structural changes in the environment, physical ecosystem engineering may be a relatively important, though previously neglected, interaction type in arid ecosystems. The processes governing which species occur in a particular plant community can be summarized very simply.
APA, Harvard, Vancouver, ISO, and other styles
9

Ritchie, Mark E., and Han Olff. "Resource Partitioning and Biodiversity in Fractal Environments with Applications to Dryland Communities." In Biodiversity in Drylands. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195139853.003.0018.

Full text
Abstract:
Arid and semiarid ecosystems (drylands) often contain a higher diversity of animals and plants than would be expected from their low productivity. High spatial heterogeneity of resources and physical habitats, exhibited at a wide range of spatial scales (Rundel 1996, Holling 1992, Peterson et al. 1998), may be a major factor explaining such high diversity. For example, at extremely small scales (&lt;10 cm), branched plant material and various soil physical processes can create spatial niches for invertebrates, cyanobacteria, and other cryptogamic organisms (Lightfoot and Whitford 1991). At somewhat larger scales (&lt;10 m), desert shrubs may aggregate water and organic material in “islands of fertility,” yielding a highly patchy heterogeneous distribution of resources (e.g., seeds, water) for other plants and animals (Gibbens and Beck 1988, Halvorson et al. 1997, chapter 13 this volume, chapter 11 this volume). At even larger scales (&gt;100 m), soil erosion patterns create topographic variation that locally concentrates available water and nutrients, yielding a marked heterogeneity in the distribution of productivity across the landscape (Milne 1992). These heterogeneous distributions of physical environments, biotic material, and resources are likely to have strong effects on biodiversity. Ecologists have long associated greater spatial heterogeneity with higher species diversity (MacArthur 1964; Brown 1981; May 1988). Within a particular physical environment (habitat), this association exists presumably because collections of species that use similar resources, or “guilds,” can coexist whenever they can more finely divide up space and different-sized resource “packages” (Hutchinson and MacArthur 1959, Brown 1981, 1995, Morse et al. 1985, Peterson et al. 1998). The partitioning of space and different resource patches may be constrained by the different body sizes of species within guilds (Hutchinson and MacArthur 1959, Morse et al. 1985, Belovsky 1986, 1997, Brown 1995, Siemann et al. 1996). However, the mechanism by which body size and spatial heterogeneity of habitats and resources determine species diversity remains unclear (May 1988, Brown 1995, Siemann et al. 1996, Belovsky 1997). Resource partitioning and spatial heterogeneity therefore may strongly influence diversity in drylands, where, for example, well-known guilds of granivorous vertebrates and invertebrates are structured by competition for different sizes of seeds and seed patches (Brown et al. 1979, Davidson et al. 1980, 1985).
APA, Harvard, Vancouver, ISO, and other styles
10

Mitchell, William A., and Burt P. Kotler. "Species Diversity, Environmental Heterogeneity, and Species Interactions." In Biodiversity in Drylands. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195139853.003.0009.

Full text
Abstract:
Despite their apparent simplicity, arid environments can be quite heterogeneous. From small-scale variation in substrate and slope to large-scale geographic variation in solar input and productivity, drylands and deserts provide organisms with a tremendous range of ecological challenges (Schmidt-Nielsen 1964, Huggett 1995). Any single species is unable to meet all of these challenges equally well. A species will do better in some environments than others because evolution in heterogeneous environments is constrained by fitness tradeoffs. Such tradeoffs prevent the evolution of a versatile species, competitively superior to all other species across the entire spectrum of heterogeneity (Rosenzweig 1987). Although fitness tradeoffs may hinder species’ evolution in heterogeneous environments, they are a blessing for biodiversity. The source of biodiversity that we address in this chapter is the interplay of heterogeneity, tradeoffs, and density dependence. While we focus on species interactions at the local scale, our presentation includes a model that predicts changes in local diversity as a function of climate. The model’s predictions are based on changes in the nature of competition wrought by changes in productivity levels and climatic regimes. Cast in terms of evolutionary stable strategies (ESSs), the predictions refer to evolutionary as well as ecological patterns. A mechanism of coexistence consists of an axis of environmental heterogeneity together with an axis that indicates a tradeoff in the abilities of species to exploit different parts of the axis. In the absence of some kind of heterogeneity, there is only one environmental type, and whatever species is best adapted to it will competitively exclude others. In the absence of a tradeoff, one species could evolve competitive superiority over the full range of heterogeneity, again resulting in a monomorphic community. Consider some examples of mechanisms of species’ coexistence from dryland communities (Kotler and Brown 1988, Brown et al. 1994). For many taxa, spatial heterogeneity in predation risk is a consequence of the pattern of bushy and open areas common in drylands. In certain rodent communities, some species are able to exploit the relatively riskier open microhabitats by virtue of antipredator morphologies (Kotler 1984).
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Dryland communitirs"

1

Adenan, Sakeenah, Jane Oja, Talaat Abdel-Fattah, and Juha Alatalo. "Linking Soil Chemical Parameters and Fungal Diversity in Qatar." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0068.

Full text
Abstract:
Given the vast expanse of Qatar’s dryland ecosystems, agricultural productivity and soil stability is highly dependent on the diversity of soil microbiota. The soil environment is a heterogeneous habitat shaped by various components like chemical (organic matter, salinity and nutrients) and biological (fungal diversity and vegetation) properties that form multitudes of different microhabitats. Soil microbial diversity changes along environmental gradients. It is hypothesized that a “stable” microhabitat is one that is inhabited by a large diversity of established microorganisms that are best a
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Dryland communitirs"

1

Mayanja, Maureen Nanziri, Rebecca Nalubega, John R. S. Tabuti, and Collins Grace Atuheire. Effectiveness of Ethnoveterinary Medicinal Plants of Eastern Africa in Control of Livestock Pests or Disease Pathogens: A Systematic Review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.9.0006.

Full text
Abstract:
Review question / Objective: a) What is the current state and distribution of evidence on medicinal plants for ethnoveterinary practice in livestock keeping communities in Eastern Africa? b) What evidence exists about the pharmacological activities and effectiveness in control of livestock pests or disease pathogens, of ethnoveterinary medicinal plants accessible to the drylands of Eastern Africa? Information sources: This systematic review will consider both experimental and quasi-experimental evaluation studies that report positive outcomes; in-vivo and in-vitro assays and phytochemical comp
APA, Harvard, Vancouver, ISO, and other styles
2

Sims, Kate. Education, Girls’ Education and Climate Change. Institute of Development Studies, 2021. http://dx.doi.org/10.19088/k4d.2021.044.

Full text
Abstract:
This Emerging Issue Report (EIR) explores research and evidence on the relationship between education, girls’ education and climate change. There is scientific consensus that climate change is real, manifested through increasing temperatures, changing rainfall patterns and increasing frequency and severity of extreme weather events, including drought, flooding and cyclones. Climate change, environmental degradation and climate vulnerability are closely linked. Climate change exacerbates environmental and land degradation, especially in areas with drylands and permafrost, river deltas and low-l
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography