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Download Endemic Species Distributions On The East Slope Of The Andes by Bruce E. Young (Editor) PDF

By Bruce E. Young (Editor)

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Cordillera de La Paz. Also known as the Cordillera Real, near the Bolivian capital city of La Paz. 2. Cordillera de Tres Cruces. Near departmental border between La Paz and Cochabamba. Figure 29. Distribution of avian collecting localities in the study area. results. Among the families with several target species, there were examples in each of relatively wide-ranging and narrow-ranging species. For example, the tanagers (Thraupidae) included both broadly-distributed (Conirostrum ferrugineiventre, 82,401 km2) and narrow endemic (Tangara meyerdeschauenseei, 2,734 km2) species.

Although the high levels of diversity, low collecting effort relative to the expanse of territory, difficult access, and microendemism all contribute to large numbers of species being known from single or few localities, we still were able to successfully model the distributions of nearly two-thirds of the species. The modeled distributions in many cases produced satisfactory results, as judged by external reviewers, even when a species was known from as few as two localities. Distributions of many montane plants may be limited by physiological adaptation to narrow climatic conditions (Kessler 2000a, 2001c).

2006), which may explain why the models worked so well for our focal endemic species, most of which are specialists. Our experience modeling the Cloudforest ScreechOwl (Megascops marshalli) demonstrates the power of species distribution models for predicting species’ occurrences. When we began the study, this species Figure 33. Endemic bird areas (Stattersfield et al. 1998) superimposed on Figure 30. was known from three localities in Pasco and northern Cusco, Peru. The Maxent model using these points predicted the species to occur not only in the vicinity of the known localities, but also in widely disjunct locations in the Bolivian Andes in northern La Paz and northern Cochabamba departments.

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