Material legacies can degrade resilience: Structure‐retaining disturbances promote regime shifts on coral reefs
Material legacies can degrade resilience: Structure‐retaining disturbances promote regime shifts on coral reefs
复制标题
物质遗产会降低复原力：结构保留干扰促进珊瑚礁的政权转变
DOI：
10.1002/ecy.4006
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发表时间：
2023
期刊：
影响因子：
4.8
通讯作者：
Moeller, Holly V.
中科院分区：
文献类型：
--
作者：
Kopecky, Kai L.;Stier, Adrian C.;Schmitt, Russell J.;Holbrook, Sally J.;Moeller, Holly V.
栖息地形成生物的直立死亡结构（例如，因干扰而死亡的树木、珊瑚骨骼、牡蛎壳等物质遗产可能影响生态系统的恢复进程。许多生态系统都受到不同类型的干扰，这些干扰要么使生物结构消失，要么使其保持完整。在这里，我们使用了一个数学模型来量化珊瑚礁生态系统的弹性如何在结构移除和结构保留干扰事件后受到不同的影响，特别关注从珊瑚到大型藻类的政权转移的潜力。我们发现，死亡的珊瑚骨骼可以大大降低珊瑚的弹性，如果他们提供大型藻类避难所，从草食动物，一个关键的反馈与珊瑚种群的恢复。我们的模型表明，死亡骨骼的物质遗产扩大了草食动物生物量的范围，其中珊瑚和大型藻类的状态是不确定的。因此，物质遗产可以通过修改系统驱动（食草动物）和状态变量（珊瑚覆盖）之间的潜在关系来改变弹性。
Standing dead structures of habitat‐forming organisms (e.g., dead trees, coral skeletons, oyster shells) killed by a disturbance are material legacies that can affect ecosystem recovery processes. Many ecosystems are subject to different types of disturbance that either remove biogenic structures or leave them intact. Here we used a mathematical model to quantify how the resilience of coral reef ecosystems may be differentially affected following structure‐removing and structure‐retaining disturbance events, focusing in particular on the potential for regime shifts from coral to macroalgae. We found that dead coral skeletons could substantially diminish coral resilience if they provided macroalgae refuge from herbivory, a key feedback associated with the recovery of coral populations. Our model shows that the material legacy of dead skeletons broadens the range of herbivore biomass over which coral and macroalgae states are bistable. Hence, material legacies can alter resilience by modifying the underlying relationship between a system driver (herbivory) and a state variable (coral cover).