Do riparian reserves support dung beetle biodiversity and ecosystem services in oil palm-dominated tropical landscapes?
Do riparian reserves support dung beetle biodiversity and ecosystem services in oil palm-dominated tropical landscapes?
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DOI：
10.1002/ece3.1003
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发表时间：
2014-04
影响因子：
2.6
通讯作者：
Lewis, Owen T.
中科院分区：
文献类型：
--
作者：
Gray, Claudia L.;Slade, Eleanor M.;Mann, Darren J.;Lewis, Owen T.
农业扩张和集约化是对全球生物多样性、生态功能和生态系统服务的主要威胁。油棕榈在热带森林景观中的迅速扩张特别令人关切，因为它们具有高度的生物多样性。因此，确定在油棕种植园内维持本地物种和相关生态过程的管理方法是一个优先事项。河岸保护区是在耕地地区河流沿岸保留的森林带，主要是为了它们的积极水文影响。然而，它们也可以支持一系列依赖森林的物种或生态系统服务。在马来西亚婆罗洲的沙巴，我们调查了蜣螂的群落，并测量了以油棕为主的景观中的粪便清除活动。在河岸保护区的甲虫的物种丰富度，多样性和功能组丰富度显着高于油棕，但低于相邻的采伐林。河岸保护区的群落组成更类似于砍伐森林比油棕。尽管生物多样性存在显著差异，但我们没有发现土地利用方式之间粪便去除率的显著差异。我们也没有发现任何证据表明河岸保护区提高了周围油棕的粪便去除率。这些结果对比以往的研究表明，热带森林中的粪甲虫物种丰富度和粪便去除之间的正相关关系。我们发现河岸保护区宽度和蜣螂多样性之间存在微弱但显著的正相关关系，保护区植被复杂性和蜣螂丰度之间存在显著的正相关关系，这表明这些特征可能会增加河岸保护区的保护价值。合成和应用：河岸保护区和采伐森林之间的相似性表明，保留河岸保护区增加了油棕景观的生物多样性。然而，粪甲虫群落特征和粪便去除之间缺乏相关性，突出了需要进一步研究生物多样性-生态系统功能关系的空间变化，以及这些研究的结果如何受到方法选择的影响。
Agricultural expansion and intensification are major threats to global biodiversity, ecological functions, and ecosystem services. The rapid expansion of oil palm in forested tropical landscapes is of particular concern given their high biodiversity. Identifying management approaches that maintain native species and associated ecological processes within oil palm plantations is therefore a priority. Riparian reserves are strips of forest retained alongside rivers in cultivated areas, primarily for their positive hydrological impact. However, they can also support a range of forest-dependent species or ecosystem services. We surveyed communities of dung beetles and measured dung removal activity in an oil palm-dominated landscape in Sabah, Malaysian Borneo. The species richness, diversity, and functional group richness of dung beetles in riparian reserves were significantly higher than in oil palm, but lower than in adjacent logged forests. The community composition of the riparian reserves was more similar to logged forest than oil palm. Despite the pronounced differences in biodiversity, we did not find significant differences in dung removal rates among land uses. We also found no evidence that riparian reserves enhance dung removal rates within surrounding oil palm. These results contrast previous studies showing positive relationships between dung beetle species richness and dung removal in tropical forests. We found weak but significant positive relationships between riparian reserve width and dung beetle diversity, and between reserve vegetation complexity and dung beetle abundance, suggesting that these features may increase the conservation value of riparian reserves. Synthesis and applications: The similarity between riparian reserves and logged forest demonstrates that retaining riparian reserves increases biodiversity within oil palm landscapes. However, the lack of correlation between dung beetle community characteristics and dung removal highlights the need for further research into spatial variation in biodiversity–ecosystem function relationships and how the results of such studies are affected by methodological choices.
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