Results 261 to 270 of about 6,099,598 (309)

Where the rare species are

Molecular Ecology, 2009
Prioritizing geographic areas for conservation attention is important – time and money are in short supply but endangered species are not – and difficult. One popular perspective highlights areas with many species found nowhere else (Myers et al. 2000). Another identifies areas that contain species with fewer close relatives elsewhere (Faith 1992). One
Arne O, Mooers, David W, Redding
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Sampling to Detect Rare Species

Ecological Applications, 1993
Often a sampling program has the objective of detecting the presence of one or more species. One night wish to obtain a species list for the habitat, or to detect the presence of a rare and possibly endangered species. How can the sampling effort necessary for the detection of a rare species can be determined?
Roger H, Green, Richard C, Young
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Pollinator constancy and survival of rare species

Oecologia, 1975
A Markov model of pollinator activity is used to study the effect of constancy on rare plant species. Roughly, constancy is the tendency of the pollinator to continue searching for a flower of the species last visited. The model involves and abundant plant speciesA and two uncommon plant species,B andC, where the pollinator does not distinguish ...
Larry E, Bobisud, Ralph J, Neuhaus
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Threatened species not necessarily rare, rare species not necessarily threatened

Environmental Conservation, 1997
In the beautifully-illustrated book of rare and threatened plants of Greece (Phitos et al. 1995), the selection of species is based strictly on the four World Conservation Union (IUCN) categories of ‘extinct’, ‘endangered’, ‘vulnerable’ and ‘rare’ (Lucas & Synge 1978). The Swedish ‘red data’ book of plants (Aronsson et al.
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On the rare species of a population

Journal of Statistical Planning and Inference, 1995
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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When Are Rare Species Not There?

Oikos, 1990
Rare species are very common; a significant proportion of every community is made up of species with small populations (e.g. Morse et al. 1988). Such species pose a real problem for ecologists studying diversity, species composition and turnover. The chief problem is: when is a rare species not there?
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Explaining the excess of rare species in natural species abundance distributions

Nature, 2003
(Uploaded by Plazi for the Bat Literature Project) No abstract provided.
Anne E, Magurran, Peter A, Henderson
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A tool for finding rare marine species

Science, 2018
Environmental DNA analysis shows promise for studying rare and elusive marine ...
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Rare Species and Ecosystem Functioning

Conservation Biology, 2005
Abstract:  The role of diversity in the maintenance of ecosystems has been studied widely in the past decade. By correlating richness and diversity with basic ecosystem processes, these investigations lend support to the hypothesis that species diversity significantly influences ecosystem functioning and, in ...
K. G. LYONS, C. A. BRIGHAM, B.H. TRAUT, M. W. SCHWARTZ   +3 more
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The population ecology of rare species

Journal of Fish Biology, 1990
There is no general theory of rarity, although one is sorely needed both to understand population dynamics and to determine conservation priorities. Here we suggest some of the strands that might be woven into such a theory. They include relationships between local abundance, geographic range size and body size of species, and the determinants of ...
K. J. Gaston, J. H. Lawton
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