Publications:

Hoarau et al. 2021


scientific article | Diversity

Unexplored Refugia with High Cover of Scleractinian Leptoseris spp. and Hydrocorals Stylaster flabelliformis at Lower Mesophotic Depths (75–100 m) on Lava Flows at Reunion Island (Southwestern Indian Ocean)

Hoarau L, Rouzé H, Boissin E, Gravier-Bonnet N, Plantard P, Loisil C, Bigot L, Chabanet P, Labarrère P, Penin L, Adjeroud M, Mulochau T


Abstract

Mesophotic Coral Ecosystems (MCEs)—specifically the lower mesophotic zone (60–150 m depth)—are poorly studied with respect to shallow reefs. Yet, this deep zone harbors distinct benthic communities that are adapted to low light levels which may provide refugia for an underestimated biodiversity. The lower mesophotic zone was recently investigated across Reunion Island coasts (Southwest Indian Ocean) using closed circuit rebreathers. Dense aggregations of Scleractinian Leptoseris spp. and rare hydrocorals Stylaster flabelliformis were found at 75–100 m on lava flows highlighting the distinctness of MCEs and supporting the high potential of deep refugia for an underexplored biodiversity.

Keywords
Meta-data (pending validation)
Depth range
75- 100 m

Mesophotic “mentions”
29 x (total of 2286 words)

Classification
* Presents original data
* Focused on 'mesophotic' depth range
* Focused on 'mesophotic coral ecosystem'

Fields
Biodiversity
Community structure

Focusgroups
Hydrozoa
Scleractinia (Hard Corals)

Locations
Reunion Islands

Platforms
Rebreather

Author profiles