Roosting Ecology of Black-Headed Ibis (Threskiornis melanocephalus) in Urban and Rural Areas of Southern Rajasthan, India
Roosting Ecology of Black-Headed Ibis (Threskiornis melanocephalus) in Urban and Rural Areas of Southern Rajasthan, India
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DOI：
10.1675/063.042.0106
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发表时间：
2019-03-01
期刊：
影响因子：
0.3
通讯作者：
Sundar, K. S. Gopi
中科院分区：
文献类型：
--
作者：
Koli, Vijay K.;Chaudhary, Sunil;Sundar, K. S. Gopi
人们对大多数水鸟的栖息生态知之甚少，对南亚的了解就更少了，那里有许多水鸟栖息在人类改造过的地区。在印度南部拉贾斯坦邦的城市和农村环境中研究了黑头朱鹮的栖息生态学。分析的重点是评估筑巢地点、城市和农村栖息地以及配对地点（即靠近黑头朱鹮栖息地但没有黑头朱鹮的水鸟栖息地）之间的地点特征是否存在差异。此外，假设影响黑头朱鹮数量的因素在城市和农村的栖息地是相似的，这一假设得到了检验。树木特征（冠层盖度、胸围）在巢地和栖地之间存在差异（P < 0.05）。城市栖息地受到的干扰是农村栖息地的2.3倍。配对样地特征与城市样地相似（多响应排列过程，显著性δ = 0.3），但与农村样地不同。在城市和农村环境中，共栖鸟类组合在不同的栖息地和配对地点之间存在显著差异（delta的显著性< 0.01）。城市栖息地的黑头朱鹮数量受到多种变量的影响，但在农村栖息地的模型显示出相当大的模糊性。结果强烈表明，在物种状态评估中包括栖息地是很重要的。
The roosting ecology of most waterbird species is poorly known and even less is known from southern Asia, where many species inhabit human-modified areas. Roosting ecology of the Black-headed Ibis (Threskiornis melanocephalus) was studied in urban and rural settings in southern Rajasthan, India. Analyses focused on assessing whether site characteristics varied between nest sites, urban and rural roost sites, and paired sites (i. e., a waterbird roost site near Black-headed Ibis roosts but without Black-headed Ibis). Additionally, the hypothesis that factors affecting Black-headed Ibis numbers at roosts would be similar at urban and rural sites was tested. Tree characteristics (canopy cover, girth at breast height) were different (P < 0.05) between nest and roost sites. Urban roost sites experienced 2.3 times greater disturbance than rural roost sites. Paired site characteristics were similar to urban roost sites (multi response permutation procedure, significance of delta = 0.3), but were dissimilar to rural roost sites. Co-occurring roosting bird assemblages were significantly different between roosts and paired sites (significance of delta < 0.01) in urban and rural settings. Black-headed Ibis numbers at urban roosts were influenced by multiple variables, but models showed considerable ambiguity at rural sites. Results strongly suggest that including roost sites in a species status assessment is important.