Immigrants are attracted by local pre-breeders and recruits in a seabird colony.
Immigrants are attracted by local pre-breeders and recruits in a seabird colony.
复制标题
移民被当地的预繁育者和海鸟栖息地的新成员所吸引
DOI:
10.1111/1365-2656.12206
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Becker PH
中科院分区:
文献类型:
--
作者:
Szostek KL;Schaub M;Becker PH
Immigration is a major demographic factor shaping population dynamics. However, due to methodological difficulties, the extent of immigration and factors affecting immigration are insufficiently studied. This is also true for seabird colonies.We estimated annual immigration based on a long‐term study of a colony of common ternsSterna hirundomarked with transponders, using a Bayesian integrated population model that links colony size and productivity with individual life histories.Strong annual fluctuations in the number of immigrants were found. To identify whether colony‐specific covariates influenced immigration, we related the number of immigrants to various proxy variables for breeding site quality, specifically colony size, productivity, number of local subadults and local recruits. Numbers of local recruits and local subadults showed strong positive correlations with number of immigrants.We found that variation in immigration rate had strongly contributed to variation in colony growth rate, more so than variation in local recruitment or adult survival.Collectively, results suggest that immigration strongly affects colony growth rate, that the driving force behind immigration is natal dispersal and that immigrants were attracted by local recruits.
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影响因子:
56.9
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通讯作者:
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影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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