Taking the metabolic pulse of the world's coral reefs.
Taking the metabolic pulse of the world's coral reefs.
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DOI：
10.1371/journal.pone.0190872
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Yamamoto S
中科院分区：
文献类型：
--
作者：
Cyronak T;Andersson AJ;Langdon C;Albright R;Bates NR;Caldeira K;Carlton R;Corredor JE;Dunbar RB;Enochs I;Erez J;Eyre BD;Gattuso JP;Gledhill D;Kayanne H;Kline DI;Koweek DA;Lantz C;Lazar B;Manzello D;McMahon A;Meléndez M;Page HN;Santos IR;Schulz KG;Shaw E;Silverman J;Suzuki A;Teneva L;Watanabe A;Yamamoto S
在世界范围内，珊瑚礁生态系统正经历着来自各种人为扰动的越来越大的压力，这些扰动包括海洋变暖和酸化、沉积增加、富营养化和过度捕捞，这些扰动可能使珊瑚礁转向净碳酸钙（CaCO3）溶解和侵蚀的状态。在此，我们确定了全球23个珊瑚礁地点的净钙化电位和净有机碳代谢（净群落产量；NCP）和净无机碳代谢（净群落钙化；NCC）的相对平衡。基于以上研究结果，本文认为利用总碱度（TA）和溶解无机碳（DIC）这两个指标在不同时空尺度上监测人为变化下珊瑚礁生物地球化学的适宜性。根据相对于近海的碱度损耗推断，本研究中的所有珊瑚礁在大多数观测值中都是净钙化的，尽管偶尔在大多数地点观测到净溶解。然而，净钙化电位较低（即TA耗竭较低）的珊瑚礁可能比净钙化电位较高的珊瑚礁更快地转向净溶解。有机碳通量对溶解无机碳（DIC）总变化的影响百分比（即NCP与NCP和NCC之和的比值）在32% ~ 88%之间，反映了生物地球化学内在的差异。对于给定的DIC变化，NCP相对百分比最大的珊瑚礁经历了最大的海水pH变异性，这与珊瑚礁相对于开放海洋提高或抑制局部pH的能力直接相关。这项工作强调了在评估珊瑚礁对持续的全球环境变化的易感性时测量珊瑚礁碳酸盐化学的价值，并提供了一个基线，以指导未来旨在保护这些有价值的生态系统的保护工作。
Worldwide, coral reef ecosystems are experiencing increasing pressure from a variety of anthropogenic perturbations including ocean warming and acidification, increased sedimentation, eutrophication, and overfishing, which could shift reefs to a condition of net calcium carbonate (CaCO3) dissolution and erosion. Herein, we determine the net calcification potential and the relative balance of net organic carbon metabolism (net community production; NCP) and net inorganic carbon metabolism (net community calcification; NCC) within 23 coral reef locations across the globe. In light of these results, we consider the suitability of using these two metrics developed from total alkalinity (TA) and dissolved inorganic carbon (DIC) measurements collected on different spatiotemporal scales to monitor coral reef biogeochemistry under anthropogenic change. All reefs in this study were net calcifying for the majority of observations as inferred from alkalinity depletion relative to offshore, although occasional observations of net dissolution occurred at most locations. However, reefs with lower net calcification potential (i.e., lower TA depletion) could shift towards net dissolution sooner than reefs with a higher potential. The percent influence of organic carbon fluxes on total changes in dissolved inorganic carbon (DIC) (i.e., NCP compared to the sum of NCP and NCC) ranged from 32% to 88% and reflected inherent biogeochemical differences between reefs. Reefs with the largest relative percentage of NCP experienced the largest variability in seawater pH for a given change in DIC, which is directly related to the reefs ability to elevate or suppress local pH relative to the open ocean. This work highlights the value of measuring coral reef carbonate chemistry when evaluating their susceptibility to ongoing global environmental change and offers a baseline from which to guide future conservation efforts aimed at preserving these valuable ecosystems.
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影响因子：
10.1
作者：
Edmunds, Peter J.;Comeau, Steeve;Carpenter, Robert C.
通讯作者：
Carpenter, Robert C.
DOI：
10.1098/rspb.2016.1742
发表时间：
2016-11-16
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Enochs IC;Manzello DP;Kolodziej G;Noonan SH;Valentino L;Fabricius KE
通讯作者：
Fabricius KE
影响因子：
5.2
作者：
Cyronak, T.;Santos, I. R.;Eyre, B. D.
通讯作者：
Eyre, B. D.
影响因子：
11.4
作者：
Byrne, Robert H.
通讯作者：
Byrne, Robert H.
影响因子：
5.2
作者：
Cyronak, Tyler;Santos, Isaac R.;Eyre, Bradley D.
通讯作者：
Eyre, Bradley D.