Nationwide trophic cascades: changes in avian community structure driven by ungulates

被引:11
|
作者
Palmer, Georgina [1 ,2 ]
Stephens, Philip A. [1 ]
Ward, Alastair I. [3 ,4 ]
Willis, Stephen G. [1 ]
机构
[1] Univ Durham, Sch Biol & Biomed Sci, Durham DH1 3LE, England
[2] Univ York, Dept Biol, York YO10 5DD, N Yorkshire, England
[3] Anim & Plant Hlth Agcy, Natl Wildlife Management Ctr, York YO41 1LZ, N Yorkshire, England
[4] Univ Hull, Sch Biol Biomed & Environm Sci, Kingston Upon Hull HU6 7RX, N Humberside, England
来源
SCIENTIFIC REPORTS | 2015年 / 5卷
关键词
POPULATION TRENDS; WOODLAND BIRDS; DEER; BIODIVERSITY; IMPACT; RESPONSES;
D O I
10.1038/srep15601
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
In recent decades, many ungulate populations have changed dramatically in abundance, resulting in cascading effects across ecosystems. However, studies of such effects are often limited in their spatial and temporal scope. Here, we contrast multi-species composite population trends of deer-sensitive and deer-tolerant woodland birds at a national scale, across Britain. We highlight the divergent fates of these two groups between 1994 and 2011, and show a striking association between the calculated divergence and a composite population trend of woodland deer. Our results demonstrate the link between changes in deer populations and changes in bird communities. In a period when composite population trends for deer increased by 46%, the community population trend across deer-sensitive birds (those dependent on understory vegetation) declined much more than the community trend for deer-tolerant birds. Our findings suggest that ongoing changes in the populations of herbivorous ungulates in many countries worldwide may help explain patterns of community restructuring at other trophic levels. Ungulate impacts on other taxa may require more consideration by conservation practitioners than they currently receive.
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页数:6
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