Read e-book online Biodiversity in Drylands: Toward a Unified Framework PDF

By Moshe Shachak, James R. Gosz, Stewart T. A. Pickett, Avi Perevolotsky

ISBN-10: 0195139852

ISBN-13: 9780195139853

ISBN-10: 0198032013

ISBN-13: 9780198032014

Biodiversity in Drylands, the 1st the world over dependent synthesis quantity within the long term Ecological examine (LTER) community sequence, unifies the ideas of species and panorama variety with recognize to deserts. inside of this framework, the booklet treats numerous rising issues, between them: · how animal biodiversity could be supported in deserts · diversity's relation to habitat constitution, environmental variability, and species interactions · the relation among spatial scale and variety · the best way to use a panorama simulation version to appreciate range · microbial contributions to biodiversity in deserts · species range and atmosphere tactics · source partitioning and biodiversity in fractal environments · results of grazing on biodiversity · reconciliation ecology and the way forward for conservation administration within the face of worldwide swap, integration is essential for facing the matter of maintaining biodiversity. This booklet can provide to be an important source for college kids, researchers, and executives drawn to integrative species, source, and panorama diversities.

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Additional resources for Biodiversity in Drylands: Toward a Unified Framework (Long-Term Ecological Research Network Series)

Example text

One of the earliest studies was performed by Da Cunha and Dobzhansky (1954), who compared chromosomal polymorphism in core and peripheral populations of Drosophila. Their hypothesis was that the amount of adaptive polymorphism carried in a population is correlated with the variety of the ecological niches its members exploit. They found that core Drosophila willistoni populations were highly polymorphic relative to those at the periphery, where the species was less common and less ubiquitous than its competitors.

Indeed, Cody (1986) found that the root:shoot ratio in desert shrubs is around 2, while mesic habitats typically have root:shoot ratios less than 1 (Tilman 1988). Thus, compared with more mesic areas, deserts should have a higher proportion of primary production going into detritus than to herbivores. In addition to being more abundant, the detritus in deserts should be less likely to be broken down by free-living microbes. The low moisture in deserts during most of the year limits microbial decomposition of both above- and below-ground plant litter (Vishnevetsky and Steinberger 1997).

Chapman and Hall, London. H. Lawton. 1996. The population dynamics of ecosystem engineers. Oikos 76: 273–283. H. 1994. The measurement of biodiversity and the politics of implementation. L. J. I. ), Systematics and Conservation Evaluation, pp. 15–22. Oxford University Press, Oxford. H. Lawton, and M. Shachak. 1994. Organisms as ecosystem engineers. Oikos 69: 373–386. H. Lawton, and M. Shachak. 1997. Positive and negative effects of organisms as physical ecosystem engineers. Ecology 78: 1946–1957.

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Biodiversity in Drylands: Toward a Unified Framework (Long-Term Ecological Research Network Series) by Moshe Shachak, James R. Gosz, Stewart T. A. Pickett, Avi Perevolotsky

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