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Multi-species occupancy modeling provides novel insights into amphibian metacommunity structure and wetland restoration
Ecological Applications ( IF 5 ) Pub Date : 2021-01-11 , DOI: 10.1002/eap.2293 Andrew J Hamer 1, 2 , Dénes Schmera 2 , Michael J Mahony 3
Ecological Applications ( IF 5 ) Pub Date : 2021-01-11 , DOI: 10.1002/eap.2293 Andrew J Hamer 1, 2 , Dénes Schmera 2 , Michael J Mahony 3
Affiliation
A fundamental goal of community ecology is to understand species–habitat relationships and how they shape metacommunity structure. Recent advances in occupancy modeling enable habitat relationships to be assessed for both common and rare species within metacommunities using multi-species occupancy models (MSOM). These models account for imperfect species detection and offer considerable advantages over other analytical tools commonly used for community analyses under the elements of metacommunity structure (EMS) framework. Here, we demonstrate that MSOM can be used to infer habitat relationships and test metacommunity theory, using amphibians. Repeated frog surveys were undertaken at 55 wetland sites in southeastern Australia. We detected 11 frog species from three families (Limnodynastidae, Myobatrachidae, and Pelodryadidae). The rarest species was detected at only one site whereas the most common species was detected at 42 sites (naive occupancy rate 0.02–0.76). Two models were assessed representing two competing hypotheses; the best-supported model included the covariates distance to the nearest site (connectivity), wetland area, presence of the non-native eastern mosquitofish (Gambusia holbrooki), proportion cover of emergent vegetation, an interaction term between Gambusia and emergent vegetation cover, and the proportion canopy cover over a site. Hydroperiod played no detectable role in metacommunity structure. We found species–habitat relationships that fit with current metacommunity theory: occupancy increased with wetland area and connectivity. There was a strong negative relationship between occupancy and the presence of predatory Gambusia, and a positive interaction between Gambusia and emergent vegetation. The presence of canopy cover strongly increased occupancy for several tree frog species, highlighting the importance of terrestrial habitat for amphibian community structure. We demonstrated how responses by amphibians to environmental covariates at the species level can be linked to occupancy patterns at the metacommunity scale. Our results have clear management implications: wetland restoration projects for amphibians and likely other taxa should maximize wetland area and connectivity, establish partial canopy cover, and eradicate Gambusia or provide aquatic vegetation to mitigate the impact of this non-native fish. We strongly advocate the use of MSOM to elucidate the habitat drivers behind animal occupancy patterns and to derive unbiased occupancy estimates for monitoring programs.
中文翻译:
多物种占用模型为两栖动物元群落结构和湿地恢复提供了新的见解
群落生态学的一个基本目标是了解物种-栖息地关系以及它们如何塑造元群落结构。占用模型的最新进展使得可以使用多物种占用模型 (MSOM) 评估元群落内常见和稀有物种的栖息地关系。这些模型解释了不完善的物种检测,并提供了比其他常用于在元群落结构 (EMS) 框架元素下进行群落分析的分析工具的相当大的优势。在这里,我们证明了 MSOM 可用于使用两栖动物推断栖息地关系和测试元群落理论。在澳大利亚东南部的 55 个湿地地点进行了重复的青蛙调查。我们检测到来自三个科(Limnodynastidae、Myobatrachidae 和 Pelodryadidae)的 11 种青蛙。仅在一个地点检测到最稀有的物种,而在 42 个地点检测到最常见的物种(初始占用率为 0.02-0.76)。评估了两个模型,代表了两个相互竞争的假设;最受支持的模型包括到最近站点的协变量距离(连通性)、湿地面积、非本地东部蚊鱼的存在(Gambusia holbrooki ),挺水植被覆盖率,Gambusia和挺水植被覆盖度之间的交互项,以及一个地点的冠层覆盖率。Hydroperiod 在元群落结构中没有可检测到的作用。我们发现物种 - 栖息地关系符合当前的元社区理论:占用率随着湿地面积和连通性而增加。有一种强烈的负占用之间,掠夺性的存在关系食蚊和之间的正相互作用,食蚊和挺生植被。冠层的存在大大增加了几种树蛙物种的入住率,突出了陆地栖息地对两栖动物群落结构的重要性。我们展示了两栖动物对物种水平的环境协变量的反应如何与元社区规模的占用模式相关联。我们的结果具有明确的管理意义:两栖动物和其他可能的分类群的湿地恢复项目应该最大限度地扩大湿地面积和连通性,建立部分树冠覆盖,并根除Gambusia或提供水生植被以减轻这种非本地鱼类的影响。我们强烈主张使用 MSOM 来阐明动物居住模式背后的栖息地驱动因素,并为监测计划得出无偏见的居住估计。
更新日期:2021-01-11
中文翻译:
多物种占用模型为两栖动物元群落结构和湿地恢复提供了新的见解
群落生态学的一个基本目标是了解物种-栖息地关系以及它们如何塑造元群落结构。占用模型的最新进展使得可以使用多物种占用模型 (MSOM) 评估元群落内常见和稀有物种的栖息地关系。这些模型解释了不完善的物种检测,并提供了比其他常用于在元群落结构 (EMS) 框架元素下进行群落分析的分析工具的相当大的优势。在这里,我们证明了 MSOM 可用于使用两栖动物推断栖息地关系和测试元群落理论。在澳大利亚东南部的 55 个湿地地点进行了重复的青蛙调查。我们检测到来自三个科(Limnodynastidae、Myobatrachidae 和 Pelodryadidae)的 11 种青蛙。仅在一个地点检测到最稀有的物种,而在 42 个地点检测到最常见的物种(初始占用率为 0.02-0.76)。评估了两个模型,代表了两个相互竞争的假设;最受支持的模型包括到最近站点的协变量距离(连通性)、湿地面积、非本地东部蚊鱼的存在(Gambusia holbrooki ),挺水植被覆盖率,Gambusia和挺水植被覆盖度之间的交互项,以及一个地点的冠层覆盖率。Hydroperiod 在元群落结构中没有可检测到的作用。我们发现物种 - 栖息地关系符合当前的元社区理论:占用率随着湿地面积和连通性而增加。有一种强烈的负占用之间,掠夺性的存在关系食蚊和之间的正相互作用,食蚊和挺生植被。冠层的存在大大增加了几种树蛙物种的入住率,突出了陆地栖息地对两栖动物群落结构的重要性。我们展示了两栖动物对物种水平的环境协变量的反应如何与元社区规模的占用模式相关联。我们的结果具有明确的管理意义:两栖动物和其他可能的分类群的湿地恢复项目应该最大限度地扩大湿地面积和连通性,建立部分树冠覆盖,并根除Gambusia或提供水生植被以减轻这种非本地鱼类的影响。我们强烈主张使用 MSOM 来阐明动物居住模式背后的栖息地驱动因素,并为监测计划得出无偏见的居住估计。