Avian biodiversity losses from grazing of high Andean páramo
Avian biodiversity losses from grazing of high Andean páramo
复制标题
安第斯高山放牧导致鸟类生物多样性丧失
DOI:
10.1016/j.biocon.2023.110298
复制
发表时间:
2023
影响因子:
5.9
通讯作者:
Mills S
中科院分区:
文献类型:
--
作者:
Mills S
Páramos are high-elevation grassland-dominated ecosystems of the northern Andes that harbour large numbers of small-ranged and endemic species and provide important ecosystem services. Though páramos are increasingly managed with a conservation focus, they remain ecologically threatened, in part due to overgrazing. Here, we assess the impacts of grazing on bird communities using data collected from three páramo complexes in the Eastern Andes of Colombia. We (1) assess how densities of shrubs and frailejones—a keystone group of plants in the páramo—are impacted by grazing, (2) determine the influence of these vegetation features on bird occupancy, and (3) examine how bird species richness and community composition are impacted by páramo grazing. We find that grazing status strongly influences the vegetation characteristics of the páramo, resulting in large reductions in the abundance of shrubs and frailejones. These vegetation changes have significant impacts on páramo bird communities, with reduced shrub abundance resulting in lower occupancy for most species (4 out of 48). As a consequence, grazed páramo communities contain fewer bird species and vary in composition relative to those of natural páramo. However, the magnitudes of these differences are modest and it is possible that low-intensity grazing remains compatible with conservation management. We suggest that it is important to consider how páramo conservation may interact with management of adjacent montane forests and the potential for leakage effects resulting in increased deforestation outside of protected areas.
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DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
L. Sarmiento
通讯作者:
L. Sarmiento
影响因子:
3.7
作者:
Lutz DA;Powell RL;Silman MR
通讯作者:
Silman MR
影响因子:
3.9
作者:
P. Sklenář;I. Hedberg;A. Cleef
通讯作者:
P. Sklenář;I. Hedberg;A. Cleef
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
P. Ungar
通讯作者:
P. Ungar
影响因子:
2.1
作者:
J. Urbina;J. C. Benavides
通讯作者:
J. C. Benavides