Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1086/422222 |
Linking optimal foraging behavior to bird community structure in an urban-desert landscape: Field experiments with artificial food patches | |
Shochat, E; Lerman, SB; Katti, M; Lewis, DB | |
通讯作者 | Shochat, E |
来源期刊 | AMERICAN NATURALIST |
ISSN | 0003-0147 |
出版年 | 2004 |
卷号 | 164期号:2页码:232-243 |
英文摘要 | Urban bird communities exhibit high population densities and low species diversity, yet mechanisms behind these patterns remain largely untested. We present results from experimental studies of behavioral mechanisms underlying these patterns and provide a test of foraging theory applied to urban bird communities. We measured foraging decisions at artificial food patches to assess how urban habitats differ from wildlands in predation risk, missed-opportunity cost, competition, and metabolic cost. By manipulating seed trays, we compared leftover seed (giving-up density) in urban and desert habitats in Arizona. Deserts exhibited higher predation risk than urban habitats. Only desert birds quit patches earlier when increasing the missed-opportunity cost. House finches and house sparrows coexist by trading off travel cost against foraging efficiency. In exclusion experiments, urban doves were more efficient foragers than passerines. Providing water decreased digestive costs only in the desert. At the population level, reduced predation and higher resource abundance drive the increased densities in cities. At the community level, the decline in diversity may involve exclusion of native species by highly efficient urban specialists. Competitive interactions play significant roles in structuring urban bird communities. Our results indicate the importance and potential of mechanistic approaches for future urban bird community studies. |
英文关键词 | bird communities Central Arizona-Phoenix Long-Term Ecological Research project coexistence community structure giving-up density urban ecology |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000223099300011 |
WOS关键词 | HABITAT SELECTION ; PREDATION RISK ; NEST PREDATION ; HOUSE SPARROW ; COMPETITION ; GERBILS ; GRADIENT ; ENVIRONMENTS ; COEXISTENCE ; MECHANISMS |
WOS类目 | Ecology ; Evolutionary Biology |
WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology |
来源机构 | Arizona State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/146136 |
作者单位 | (1)Arizona State Univ, Ctr Environm Studies, Tempe, AZ 85287 USA |
推荐引用方式 GB/T 7714 | Shochat, E,Lerman, SB,Katti, M,et al. Linking optimal foraging behavior to bird community structure in an urban-desert landscape: Field experiments with artificial food patches[J]. Arizona State University,2004,164(2):232-243. |
APA | Shochat, E,Lerman, SB,Katti, M,&Lewis, DB.(2004).Linking optimal foraging behavior to bird community structure in an urban-desert landscape: Field experiments with artificial food patches.AMERICAN NATURALIST,164(2),232-243. |
MLA | Shochat, E,et al."Linking optimal foraging behavior to bird community structure in an urban-desert landscape: Field experiments with artificial food patches".AMERICAN NATURALIST 164.2(2004):232-243. |
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