Large reorganizations in butterfly communities during an extreme weather event
Large reorganizations in butterfly communities during an extreme weather event
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DOI：
10.1111/ecog.02228
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发表时间：
2017-05-01
期刊：
影响因子：
5.9
通讯作者：
Oliver, Tom H.
中科院分区：
文献类型：
--
作者：
De Palma, Adriana;Dennis, Roger L. H.;Oliver, Tom H.
预计干旱事件的频率和程度将会增加，这可能会改变生态群落的构成。利用描述丰度、生活史特征和保护状况的功能群落指标，基于Grime的CSR(竞争-耐压-粗放)方案，我们调查了英国蝴蝶群落在1995年一次极端干旱期间的变化。在整个英国，这些昆虫的总丰度有显著增加的趋势，伴随着群落组成的重大变化，特别是在更北、更潮湿的地点。群落倾向于从专门的、脆弱的物种转向通才的、广泛分布的物种，在接下来的一年里，群落还没有恢复到平衡。重要的是，周围景观的异质性调节了社区对干旱事件的反应。然而，与预期相反，在地形多样性较大的地区，群落变化更为极端，而土地覆盖多样性缓冲了群落变化和脆弱的专业蝴蝶数量的有限下降。
Drought events are projected to increase in frequency and magnitude, which may alter the composition of ecological communities. Using a functional community metric that describes abundance, life history traits and conservation status, based upon Grime's CSR (Competitive - Stress tolerant - Ruderal) scheme, we investigated how British butterfly communities changed during an extreme drought in 1995. Throughout Britain, the total abundance of these insects had a significant tendency to increase, accompanied by substantial changes in community composition, particularly in more northerly, wetter sites. Communities tended to shift away from specialist, vulnerable species, and towards generalist, widespread species and, in the year following, communities had yet to return to equilibrium. Importantly, heterogeneity in surrounding landscapes mediated community responses to the drought event. Contrary to expectation, however, community shifts were more extreme in areas of greater topographic diversity, whilst land-cover diversity buffered community changes and limited declines in vulnerable specialist butterflies.