Abundance estimation and Conservation Biology
نویسندگان
چکیده
James D. Nichols, USGS Patuxent Wildlife Research Center, 11510 American Holly Drive, Laurel, MD 20708–4017, U.S.A. E–mail: [email protected] Darryl I. MacKenzie, Proteus Research & Consulting Ltd., PO Box 5193, Dunedin, New Zealand. E– mail: [email protected] Nichols, J. D. & MacKenzie, D. I., 2004. Abundance estimation and Conservation Biology. Animal Biodiversity and Conservation, 27.1: 437–439.
منابع مشابه
Chilean blue whales as a case study to illustrate methods to estimate abundance and evaluate conservation status of rare species.
Often abundance of rare species cannot be estimated with conventional design-based methods, so we illustrate with a population of blue whales (Balaenoptera musculus) a spatial model-based method to estimate abundance. We analyzed data from line-transect surveys of blue whales off the coast of Chile, where the population was hunted to low levels. Field protocols allowed deviation from planned tr...
متن کاملAcceleration of exotic plant invasion in a forested ecosystem by a generalist herbivore.
The successful invasion of exotic plants is often attributed to the absence of coevolved enemies in the introduced range (i.e., the enemy release hypothesis). Nevertheless, several components of this hypothesis, including the role of generalist herbivores, remain relatively unexplored. We used repeated censuses of exclosures and paired controls to investigate the role of a generalist herbivore,...
متن کاملNative and alien plant species inventory and diversity in disturbed forests and its economic value
The study was conducted to assess the native and alien plant species in one of the highly disturbed forest (S1) and less disturbed forest (S2) in Mt. Manunggal, Cebu Island, Philippines. Twenty-four quadrats with a size of 20mx20 m were established using a quadrat sampling technique to identify and record all plant species. Diversity indices were utilized to determine species abundance, richnes...
متن کاملUse of abundance of one species as a surrogate for abundance of others.
Indicator species concepts have a long history in conservation biology. Arguments in favor of these approaches generally stress expediency and assume efficacy. We tested the premise that the abundance patterns of one species can be used to infer those of other species. Our data consisted of 72,495 bird observations on 55 species across 1046 plots distributed across 30 sub basins. We analyzed ab...
متن کاملDeclines in woodland salamander abundance associated with non-native earthworm and plant invasions.
Factors that negatively affect the quality of wildlife habitat are a major concern for conservation. Non-native species invasions, in particular, are perceived as a global threat to the quality of wildlife habitat. Recent evidence indicates that some changes to understory plant communities in northern temperate forests of North America, including invasions by 3 non-native plant species, are fac...
متن کامل