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Long-term studies to understand biodiversity changes remain scarce- especially so in tropical mountains. Here, we document changes between 1911 and 2016 to the bird community in the cloud forest of San Antonio, a mountain ridge in the Colombian Andes. We evaluated the effects of past land-use change and assessed species vulnerability to climate disruption. Forest cover decreased from 95% to 50% by 1959 and 33 forest species were extirpated. From then to 1990, forest cover remained stable, and an additional 15 species were lost-a total of 29% of the forest community. Thereafter, forest cover increased by 26% and 17 species recolonized. The main cause of extirpations was the loss of connections to adjacent forests. Currently, of the 31 (19%) extirpated birds, 25 have ranges peripheral to San Antonio, mostly in the lowlands. Most remain regionally, but broken forest connections limit their recolonization. Other causes of extirpation are hunting, wildlife trade, and water diversion. Bird community changes include: (1) A shift from predominantly common species to a prevalence of rare ones; (2) Forest generalists replaced forest specialists that require old-growth, and (3) Functional groups such as large-body frugivores and nectarivores declined disproportionally. Moreover, we found that of the remaining 122 forest birds, 19 species are vulnerable to climate disruption, and 10 have declined in abundance. Our results inform four major topics that transcend this case study. First, we show unequivocal species losses and changes in community structure and abundance at the local scale. Second, we find that increasing habitat stops delayed extirpations and help species repopulate. Third, peripheral species to a region are more prone to extirpation when forests become fragmented. Fourth, land-use changes increase species vulnerability to climate change and threaten their persistence. We suggest measures that reverse landscape transformation can restore biodiversity and improve resistance to future threats. Article impact statement: 100 years of land-use change have produced bird extirpations and abundance declines in an Andean mountain site. This article is protected by copyright. All rights reserved.
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Name: Conservation biology : the journal of the Society for Conservation Biology
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Tick-borne flavivirus infection occurring in the Kyasanur Forest in India.
A form of alveolitis or pneumonitis due to an acquired hypersensitivity to inhaled avian antigens, usually proteins in the dust of bird feathers and droppings.
The collective designation of three organizations with common membership: the European Economic Community (Common Market), the European Coal and Steel Community, and the European Atomic Energy Community (Euratom). It was known as the European Community until 1994. It is primarily an economic union with the principal objectives of free movement of goods, capital, and labor. Professional services, social, medical and paramedical, are subsumed under labor. The constituent countries are Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain, Sweden, and the United Kingdom. (The World Almanac and Book of Facts 1997, p842)
Storing and processing data on multiple servers that can be accessed through the Internet.
A species of ALPHAVIRUS isolated in central, eastern, and southern Africa.
Tropical Medicine is the study of diseases more commonly found in tropical regions than elsewhere. Examples of these diseases are malaria, yellow fever, Chagas disease, Dengue, Helminths, African trypanosomiasis, Leishmaniasis, Leprosy, Lymphatic filaria...