Temperature, species identity and morphological traits predict carbonate excretion and mineralogy in tropical reef fishes.
Temperature, species identity and morphological traits predict carbonate excretion and mineralogy in tropical reef fishes.
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DOI：
10.1038/s41467-023-36617-7
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发表时间：
2023-02-22
影响因子：
16.6
通讯作者：
Bejarano, Sonia
中科院分区：
文献类型：
--
作者：
Ghilardi, Mattia;Salter, Michael A.;Parravicini, Valeriano;Ferse, Sebastian C. A.;Rixen, Tim;Wild, Christian;Birkicht, Matthias;Perry, Chris T.;Berry, Alex;Wilson, Rod W.;Mouillot, David;Bejarano, Sonia
人为的压力正在重塑全球的珊瑚礁。对关键珊瑚礁功能预期变化的可靠预测需要对其驱动因素有足够的了解。在这里，我们研究了海洋硬骨鱼维持的一个研究很少但相关的生物地球化学功能的决定因素：肠道碳酸盐的排泄。通过对382种珊瑚礁鱼类（35科85种）的碳酸盐排泄率和矿物组成的分析，确定了预测碳酸盐排泄率的环境因子和鱼类特征。我们发现体重和相对肠长（RIL）是碳酸盐排泄的最强预测因子。体型较大的鱼类和肠道较长的鱼类，每单位质量排出的碳酸盐比体型较小的鱼类和肠道较短的鱼类不成比例地少。排出碳酸盐的矿物组成在科内高度保守，但也受RIL和温度的控制。这些结果从根本上促进了我们对鱼类在无机碳循环中的作用的理解，以及这种贡献将如何随着群落组成在不断增加的人为压力下的变化而变化。海洋鱼类可以通过排泄肠道沉淀的碳酸盐来促进无机碳循环，但潜在的驱动因素在很大程度上仍然未知。本研究确定了预测热带珊瑚礁鱼类碳酸盐排泄率和矿物组成的环境因素和鱼类特征。
Anthropogenic pressures are restructuring coral reefs globally. Sound predictions of the expected changes in key reef functions require adequate knowledge of their drivers. Here we investigate the determinants of a poorly-studied yet relevant biogeochemical function sustained by marine bony fishes: the excretion of intestinal carbonates. Compiling carbonate excretion rates and mineralogical composition from 382 individual coral reef fishes (85 species and 35 families), we identify the environmental factors and fish traits that predict them. We find that body mass and relative intestinal length (RIL) are the strongest predictors of carbonate excretion. Larger fishes and those with longer intestines excrete disproportionately less carbonate per unit mass than smaller fishes and those with shorter intestines. The mineralogical composition of excreted carbonates is highly conserved within families, but also controlled by RIL and temperature. These results fundamentally advance our understanding of the role of fishes in inorganic carbon cycling and how this contribution will change as community composition shifts under increasing anthropogenic pressures. Marine fishes can substantially contribute to the inorganic carbon cycle through the excretion of intestinally precipitated carbonates, but the underlying drivers remain largely unknown. This study identifies the environmental factors and fish traits that predict carbonate excretion rate and mineralogical composition in tropical reef fishes.
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影响因子：
2
作者：
BRABER, L;DEGROOT, SJ
通讯作者：
DEGROOT, SJ
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Dulvy NK
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