Results 221 to 230 of about 474,911 (268)

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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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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RARE SPECIES OF PLANTS

1980
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Environmental DNA tracks rare species

Science, 2018
Oceans Marine animals are often elusive, making it difficult to establish their presence in a region or to estimate population sizes. Many of these animals are also rare, making them even more difficult to study.
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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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RARE PLANT-SPECIES IN MASSACHUSETTS

1980
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Field, K. G., Coddington, Jonathan A.
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Rare and emerging Candida species

Current Fungal Infection Reports, 2009
With changes in the medical and surgical management of patients over the past 30 years, fungi have emerged as a major cause of human disease. Of the disseminated mycoses, candidiasis remains the most prevalent, with Candida albicans causing more invasive infections than any other fungus.
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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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Oerskovia species: rare opportunistic pathogens.

Journal of medical microbiology, 1980
The second documented instance of opportunistic infection by member of the genus Oerskovia is reported. There is some evidence to suggest that this group of bacteria, which is extensively distributed in the soil, may be more closely associated with man than has hitherto been supposed.
J G, Cruickshank, A H, Gawler, C, Shaldon   +2 more
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The contemporary management of cancers of the sinonasal tract in adults

Ca-A Cancer Journal for Clinicians, 2023
Rajat Thawani
exaly