Localised climate change defines ant communities in human-modified tropical landscapes
Localised climate change defines ant communities in human-modified tropical landscapes
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DOI：
10.1111/1365-2435.13737
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发表时间：
2021-01-11
影响因子：
5.2
通讯作者：
Ewers, Robert M.
中科院分区：
文献类型：
--
作者：
Boyle, Michael J. W.;Bishop, Tom R.;Ewers, Robert M.
伐木和栖息地转换在热带森林景观中创造了更热的小气候，代表了局部人为气候变化的一种强大形式。人们普遍认为，这些新出现的条件导致了改造热带森林中生物群落的变化，尽管缺乏经验证据基础。在这里，我们研究了属的生理特征与它们所经历的环境温度之间的相互作用如何导致蚂蚁群落的功能和组成变化，蚂蚁是热带森林生态系统中的重要生物，在马来西亚婆罗洲的沙巴，沿着森林干扰梯度分布的蚂蚁属的丰度和活动是由它们的耐热性（CTmax）和环境温度之间的相互作用决定的。在更多的干扰，温暖的栖息地，具有高CTmax的属增加了相对丰度和功能activity.This互动确定的相对丰度和功能activity.This下降的CTmax的，由一个温和的1.1摄氏度的日最高温度不同的原始和记录的森林之间的变化，并加强了小气候的变化增加干扰。栖息地之间的差异由5.6摄氏度（原始森林油棕榈）和4.5摄氏度（伐木林油棕榈），1摄氏度的差异CTmax属之间导致23%和16%的相对丰度的变化，和22%和17%的功能活动的差异。CTmax与个体大小和营养位置呈负相关，随着小气候温度的升高，蚂蚁变得明显更小，捕食性更低。我们的研究结果提供了证据，支持广泛持有，但从未直接测试，假设生理耐受性是干扰影响的基础-在热带雨林中的无脊椎动物的丰度和功能引起的小气候变化。这篇文章的支持信息。
Logging and habitat conversion create hotter microclimates in tropical forest landscapes, representing a powerful form of localised anthropogenic climate change. It is widely believed that these emergent conditions are responsible for driving changes in communities of organisms found in modified tropical forests, although the empirical evidence base for this is lacking.Here we investigated how interactions between the physiological traits of genera and the environmental temperatures they experience lead to functional and compositional changes in communities of ants, a key organism in tropical forest ecosystems.We found that the abundance and activity of ant genera along a gradient of forest disturbance in Sabah, Malaysian Borneo, was defined by an interaction between their thermal tolerance (CTmax) and environmental temperature. In more disturbed, warmer habitats, genera with high CTmax had increased relative abundance and functional activity, and those with low CTmax had decreased relative abundance and functional activity.This interaction determined abundance changes between primary and logged forest that differed in daily maximum temperature by a modest 1.1 degrees C, and strengthened as the change in microclimate increased with disturbance. Between habitats that differed by 5.6 degrees C (primary forest to oil palm) and 4.5 degrees C (logged forest to oil palm), a 1 degrees C difference in CTmax among genera led to a 23% and 16% change in relative abundance, and a 22% and 17% difference in functional activity. CTmax was negatively correlated with body size and trophic position, with ants becoming significantly smaller and less predatory as microclimate temperatures increased.Our results provide evidence to support the widely held, but never directly tested, assumption that physiological tolerances underpin the influence of disturbance-induced microclimate change on the abundance and function of invertebrates in tropical landscapes.A free Plain Language Summary can be found within the Supporting Information of this article.