New shortcut for conservation: The combination management strategy of "keystone species" plus "umbrella species" based on food web structure
New shortcut for conservation: The combination management strategy of "keystone species" plus "umbrella species" based on food web structure
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DOI：
10.1016/j.biocon.2023.110265
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发表时间：
2023-09-04
影响因子：
5.9
通讯作者：
Zhou，Xuehong
中科院分区：
文献类型：
--
作者：
Wang，Qiang;Li，Xingchun;Zhou，Xuehong
在保护工作中，迫切需要采取精准、高效的管理措施，应对生物多样性丧失带来的挑战。基石物种和伞物种是最广泛使用的替代物种概念之一。关键物种往往决定食物网的稳定性。伞状物种通常是顶级捕食者，并进一步影响食物网的完整性。依赖单一替代物种的保护工作常常面临局限性。为了寻求互补和优化的管理策略，我们创新性地将两个替代物种的概念结合起来，提出“关键物种+伞形物种分别反映了食物网的稳定性和完整性，因此它们的组合是最适合食物网整体保护的组合”的假设，并在典型草本沼泽生态系统中进行了验证研究。利用稳定同位素构建了典型的食物网模型，利用中心性指数和伞形物种强度指数定量确定了关键物种和伞形物种。最后，我们随机配对食物网内的节点并删除不同的节点对，以研究删除对食物网鲁棒性的影响，进一步验证假设。我们的结果表明，当删除“水生昆虫（关键物种）和顶级捕食性鲶鱼（伞状物种）”节点对时，网络效率达到最低点。这一结果证实了我们的假设，提出了一种新颖的组合管理策略，有助于制定更高效、更全面的生物多样性保护决策。
In our protection efforts, it is urgently needed to adopt precise and efficient management measures to address the challenges brought by biodiversity loss. Keystone and umbrella species are one of the most widely used surrogate species concepts. Keystone species often determine the stability of food web. Umbrella species, often the top predators and further influencing the integrity of the food web. Conservation efforts relying on a single surrogate species often face limitations. In order to seek complementary and optimized management strategies, we innovatively combining the concepts of two surrogate species, propose the hypothesis that “keystone species plus umbrella species reflect the stability and integrity of the food web respectively, so the combination of them is the most suitable combination for the overall protection of the food web”, and conducted validation research in a typical herbaceous marsh ecosystem. We constructed a typical food web model by using stable isotope, centrality indices and umbrella species strength index were used to quantitatively determine the keystone and umbrella species. Finally, we randomly paired nodes within the food web and remove different node pairs to investigate the impact of removal on the robustness of the food web, further validate the hypothesis. Our results indicated that when the node pair of “aquatic insects (keystone species) and top predatory catfish (Silurus asotus) (umbrella species)” was removed, the network efficiency reached its lowest point. This result confirmed our hypothesis, proposed a novel combination management strategy, which contribute to the development of more efficient and comprehensive biodiversity conservation decisions.