El Niño impacts on human-modified tropical forests: Consequences for dung beetle diversity and associated ecological processes
El Niño impacts on human-modified tropical forests: Consequences for dung beetle diversity and associated ecological processes
复制标题
厄尔尼诺现象对人类改造热带森林的影响：粪甲虫多样性和相关生态过程的后果
DOI：
10.1111/btp.12756
复制
发表时间：
2020
期刊：
影响因子：
2.1
通讯作者：
França F
中科院分区：
文献类型：
--
作者：
França F
我们对热带森林的生物多样性和功能如何应对人为和气候相关的压力因素的了解有限。探索厄尔尼诺现象影响的研究很少，或者基于单一的干扰后评估，很少有研究评估以前受到人为干扰影响的森林。我们侧重于屎甲虫及其相关的生态功能，评估(A)强厄尔尼诺现象的生态影响，(B)后厄尔尼诺现象甲虫的反应是否受到先前森林干扰的影响，以及(C)仅受干旱影响的森林与受干旱和火灾共同影响的森林之间的这些反应如何比较。我们在2010年、2016年和2017年--大约5年前，以及2015-16年厄尔尼诺现象之后的3-6个月和15-18个月--对分布在人类干扰梯度上的30块亚马逊森林地块进行了采样。我们从98个物种中发现了14,451种甲虫，并量化了甲虫介导的8,600种种子的传播和去除。30公斤粪便。在2015-16年厄尔尼诺现象之后，所有的粪甲虫反应(物种丰富度、丰富度、生物量、与厄尔尼诺之前条件的成分相似性以及粪便去除和种子传播的速度)都有所下降，但最直接的损失(即2016年)发生在受火灾影响的森林中。以前的森林干扰也影响了厄尔尼诺现象后的金龟子物种丰富度、丰度和物种组成。我们证明，在人为改变的亚马逊森林中，与气候相关的干扰对屎甲虫及其生态功能产生了负面影响，并表明当地人为应激源与气候相关应激源之间的相互作用值得进一步研究。葡萄牙语摘要可在网上获得。
Our knowledge of how tropical forest biodiversity and functioning respond to anthropogenic and climate‐associated stressors is limited. Research exploring El Niño impacts are scarce or based on single post‐disturbance assessments, and few studies assess forests previously affected by anthropogenic disturbance. Focusing on dung beetles and associated ecological functions, we assessed (a) the ecological effects of a strong El Niño, (b) if post‐El Niño beetle responses were influenced by previous forest disturbance, and (c) how these responses compare between forests impacted only by drought and those affected by both drought and fires. We sampled 30 Amazonian forest plots distributed across a gradient of human disturbance in 2010, 2016, and 2017—approximately 5 years before, and 3–6 and 15–18 months after the 2015–16 El Niño. We found 14,451 beetles from 98 species and quantified the beetle‐mediated dispersal of >8,600 seed mimics and the removal ofc. 30 kg of dung. All dung beetle responses (species richness, abundance, biomass, compositional similarity to pre‐El Niño condition, and rates of dung removal and seed dispersal) declined after the 2015–16 El Niño, but the greatest immediate losses (i.e., in 2016) were observed within fire‐affected forests. Previous forest disturbance also influenced post‐El Niño dung beetle species richness, abundance, and species composition. We demonstrate that dung beetles and their ecological functions are negatively affected by climate‐associated disturbances in human‐modified Amazonian forests and suggest that the interaction between local anthropogenic and climate‐related stressors merits further investigation.Abstract in Portuguese is available with online material.