Species distribution models contribute to determine the effect of climate and interspecific interactions in moving hybrid zones
Species distribution models contribute to determine the effect of climate and interspecific interactions in moving hybrid zones
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DOI：
10.1111/jeb.12244
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发表时间：
2013-11-01
影响因子：
2.1
通讯作者：
Secondi, J.
中科院分区：
文献类型：
--
作者：
Engler, J. O.;Roedder, D.;Secondi, J.
气候是限制物种分布的主要因素。然而，生物的相互作用也可能是突出的塑造地理范围，特别是对parapatric物种形成混合区。由于缺乏广泛的环境数据，很难确定每个因素的相对影响及其对接触区位置的相互作用。物种分布模型（SDM）的最新发展，现在允许解开气候和物种的相互作用在混合区及其对未来气候变化的反应的相对贡献。我们调查了在欧洲的两个parapatric雀形目鸟类的繁殖范围之间的移动杂交区。我们在繁殖季节进行了代表气候条件的SDM。我们的研究结果表明，这两个物种的实现和潜在的分布之间存在很大的不匹配，这表明种间的相互作用，而不是气候，占目前的位置的接触区。SDM的情景表明，南部分布的物种，Hippolais polyglotta，可能会失去大部分的南部分布在气候变化下，但类似的增益新的栖息地沿着混合区似乎不太可能，因为与其他物种（H.icterina）的相互作用限制了其范围的扩大。因此，每当生物的相互作用限制了活动范围的扩大时，如果由于气候变化造成的活动范围的丧失比接触区的移动更快，物种就可能被捕获。据报告，移动的混合区越来越多，但移动的直接原因往往仍不清楚。在全球气候变化的背景下，我们呼吁更多地关注它们与气候变化的相互作用。
Climate is a major factor delimiting species' distributions. However, biotic interactions may also be prominent in shaping geographical ranges, especially for parapatric species forming hybrid zones. Determining the relative effect of each factor and their interaction of the contact zone location has been difficult due to the lack of broad scale environmental data. Recent developments in species distribution modelling (SDM) now allow disentangling the relative contributions of climate and species' interactions in hybrid zones and their responses to future climate change. We investigated the moving hybrid zone between the breeding ranges of two parapatric passerines in Europe. We conducted SDMs representing the climatic conditions during the breeding season. Our results show a large mismatch between the realized and potential distributions of the two species, suggesting that interspecific interactions, not climate, account for the present location of the contact zone. The SDM scenarios show that the southerly distributed species, Hippolais polyglotta, might lose large parts of its southern distribution under climate change, but a similar gain of novel habitat along the hybrid zone seems unlikely, because interactions with the other species (H.icterina) constrain its range expansion. Thus, whenever biotic interactions limit range expansion, species may become trapped' if range loss due to climate change is faster than the movement of the contact zone. An increasing number of moving hybrid zones are being reported, but the proximate causes of movement often remain unclear. In a global context of climate change, we call for more interest in their interactions with climate change.