Centaurea species: the forb that won the west
Article Abstract:
Millions of hectares of the western United States and Canadian grassland are invaded by five species of the genus Centaurea, which are fundamentally different from the preexisting dominant species and can exploit changes in resource availability to become established. The success of the Centaurea species in dominating grasslands is due to their ability to compete successfully for the new limiting resource or resources such as phosphorus limitation or a colimitation of phosphorus and water.
Publication Name: Conservation Biology
Subject: Zoology and wildlife conservation
ISSN: 0888-8892
Year: 2001
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Decline of a tropical montane amphibian fauna
Article Abstract:
Amphibians have declined at Las Tablas in Puntarenas Province, Costa Rica. Evidence for atypical population fluctuations include reduced abundance and changes in sex ratios of Atelopus chiriquiensis and Hyla calypsa, as well as the presence of dead and dying members of six species of frogs and salamanders. The species most affected have both aquatic eggs and aquatic larvae. Environmental contamination, perhaps in conjunction with climate change, may be causing observed amphibian declines.
Publication Name: Conservation Biology
Subject: Zoology and wildlife conservation
ISSN: 0888-8892
Year: 1998
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Relations among isolated wetland size, hydroperiod, and amphibian species richness: Implications for wetland regulations
Article Abstract:
The assumption of a positive relationship between wetland hydroperiod and size in the United States is tested using log-linear regression. The results indicate that hydroperiod length should be included as a primary criterion in wetland regulations and advocate a landscape approach to wetlands regulation, focused in part on conserving of wetlands that represent the entire hydroperiod gradient.
Publication Name: Conservation Biology
Subject: Zoology and wildlife conservation
ISSN: 0888-8892
Year: 2000
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