A review of the sponge increase hypothesis for Caribbean mesophotic reefs
A review of the sponge increase hypothesis for Caribbean mesophotic reefs
复制标题
加勒比中光珊瑚礁海绵增加假说的综述
DOI：
10.1007/s12526-018-0904-7
复制
发表时间：
2018
影响因子：
1.6
通讯作者：
J. Pawlik
中科院分区：
文献类型：
--
作者：
Alexander R. Scott;J. Pawlik
海绵是底栖生态系统的主要组成部分，特别是在加勒比珊瑚礁上，它们在碳循环和生态系统功能方面的重要性才刚刚开始被了解。在文献中有一种反复出现的说法，称为“海绵增加假说”，声称海绵的生物量和多样性随着加勒比海珊瑚礁中孔带（至150米）的深度而增加。我们回顾了海绵增长假说的证据，从电子搜索文献开始，然后通过最近引用的参考书目进行时间回溯。我们发现17项研究报告了一个或多个与海绵丰度或多样性相关的指标，这些指标是通过全部或部分中鞘区深度的函数。这些研究都没有报告关于整体海绵生物量或多样性作为珊瑚礁表面积函数的数据。在丰度度量中，包括覆盖度和密度，作为深度函数的模式在不同的地点和地点是不同的。我们得出的结论是，没有证据支持加勒比海中厚质珊瑚礁的海绵增加假说，并建议海绵丰度模式作为深度的函数可能因多种原因而变化，包括基质类型，坡度和方向。关于海绵丰度和多样性作为深度函数的一般理论有待于采用标准化方法将海绵生物量和多样性与珊瑚礁表面积联系起来的更复杂的调查研究。
Sponges are major components of benthic ecosystems, particularly on Caribbean reefs, where their importance in carbon cycling and ecosystem function is only beginning to be understood. There is a recurring statement in the literature, herein called the “sponge increase hypothesis,” asserting that the biomass and diversity of sponges increase with depth on Caribbean reefs through the mesophotic zone (to 150 m). We reviewed evidence for the sponge increase hypothesis, beginning with electronically searchable contributions to the literature, then working backward in time through the bibliographies of more recent citations. We found 17 studies that report one or more metrics associated with sponge abundance or diversity as a function of depth through all or part of the mesophotic zone. None of these studies reported data on either overall sponge biomass or diversity as a function of reef surface area. Among abundance metrics, including cover and density, patterns as a function of depth were disparate across sites and locations. We conclude that there is no evidence to support the sponge increase hypothesis for Caribbean mesophotic reefs and suggest that patterns of sponge abundance as a function of depth are likely to vary for a number of reasons, including substratum type, slope, and orientation. General theories of sponge abundance and diversity as a function of depth await more sophisticated survey studies that employ standardized methods for relating sponge biomass and diversity to reef surface area.