Climate change can alter competitive relationships between resident and migratory birds
Climate change can alter competitive relationships between resident and migratory birds
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DOI：
10.1111/j.1365-2656.2007.01294.x
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发表时间：
2007-11-01
影响因子：
4.8
通讯作者：
Lehikoinen, Esa
中科院分区：
文献类型：
--
作者：
Ahola, Markus P.;Laaksonen, Toni;Lehikoinen, Esa
1.气候变化可能会影响留鸟和候鸟物种之间的资源竞争，通过改变它们开始繁殖的时间间隔或改变它们的种群密度。我们研究了过去50年（1953-2005）芬兰西南部居民大山雀和移民大斑姬鹬之间的种间巢洞竞争。我们发现，出现致命的接管审判，的情况下，一个大山雀的巢，但被杀死的山雀，增加减少种间产卵日期间隔和增加山雀和flycatchers的密度。大山雀巢被姬鹬占据的概率随姬鹬密度的增加而增加.大山雀和姬鹬的产卵期受不同时期温度的影响，这些温度的不同变化可能会改变它们之间的竞争关系。密度是繁殖成功和生存的结果，这可能会受到不同气候因素的影响，在驻地大山雀和跨撒哈拉移民美洲大蠊。在这些基础上，我们得出结论，气候变化有很大的潜力改变这两个物种之间的竞争平衡。
1. Climate change could affect resource competition between resident and migratory bird species by changing the interval between their onsets of breeding or by altering their population densities.2. We studied interspecific nest-hole competition between resident great tits and migrant pied flycatchers in South-Western Finland over the past five decades (1953-2005).3. We found that appearance of fatal take-over trials, the cases where a pied flycatcher tried to take over a great tit nest but was killed by the tit, increased with a reduced interspecific laying date interval and with increasing densities of both tits and flycatchers. The probability of pied flycatchers taking over great tit nests increased with the density of pied flycatchers.4. Laying dates of the great tit and pied flycatcher are affected by the temperatures of different time periods, and divergent changes in these temperatures could consequently modify their competitive interactions. Densities are a result of reproductive success and survival, which can be affected by separate climatic factors in the resident great tit and trans-Saharan migrant pied flycatcher.5. On these bases we conclude that climate change has a great potential to alter the competitive balance between these two species.