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Turner et al. 2017


scientific review | ICES J Mar Sci | open access Open access small aa108fa7f478951c693af64a05bc4b46e6711dbb69a20809512a129d4d6b870f

Deep thinking: a systematic review of mesophotic coral ecosystems

Turner JA, Babcock RC, Hovey R, Kendrick GA

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Abstract

Mesophotic coral ecosystems (MCEs) occur at depths beyond those typically associated with coral reefs. Significant logistical challenges asso- ciated with data collection in deep water have resulted in a limited understanding of the ecological relevance of these deeper coral ecosys- tems. We review the trends in this research, covering the geographic spread of MCE research, the focus of these studies, the methods used, how MCEs differ in terms of species diversity and begin to assess connectivity of coral populations. Clear locational biases were observed, with studies concentrated in a few discrete areas mainly around the Atlantic region. The focus of MCE studies has diversified in recent years and more detailed aspects of MCE ecology are now being investigated in particular areas of research. Advances in technology are also reflected in the current range of research, with a wider variety of methods now employed. However, large information gaps are present in entire regions and particularly in relation to the threats, impacts and subsequent management of MCEs. Analysis of species diversity shows that initial defini- tions based on depth alone may not be appropriate globally, while further taxonomic resolution may also be required to deduce the full bio- diversity of major groups in certain regions. Genetic studies to date show species-specific results, although distinct deeper populations do appear to exist, which raises questions regarding the potential of MCEs to act as refugia.

Fsx085
Keywords
Meta-data
Depth range
30- 150 m

Mesophotic “mentions”
105 x (total of 5424 words)

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