RAS source details
Idan, T.; Shefer, S.; Feldstein, T.; Yahel, R.; Huchon, D.; Ilan, M. (2018). Shedding light on an East-Mediterranean mesophotic sponge ground community and the regional sponge fauna. Mediterranean marine science. 19(1): 84-106.
300395
10.12681/mms.13853 [view]
Idan, T.; Shefer, S.; Feldstein, T.; Yahel, R.; Huchon, D.; Ilan, M.
2018
Shedding light on an East-Mediterranean mesophotic sponge ground community and the regional sponge fauna
Mediterranean marine science
19(1): 84-106.
Publication
Available for editors 
Sponges are a diverse and abundant phylum, globally inhabiting many hard-bottom habitats. However, data on the East-Mediterranean sponge communities are scarce, outdated, and limited to the shallow waters. This study sought to expand the knowledge of the poriferan fauna along the Mediterranean shore of Israel. A newly-discovered mesophotic sponge ground at ~100 m depth was studied using a remotely-operated vehicle (ROV), in addition to shallow-water surveys conducted by scuba diving. In the mesophotic ecosystem, sponges, serving as environmental engineers, create complex 3D structures that attract invertebrates and fish. The results of the quantitative survey of this mesophotic sponge ground reveal that it maintains a rich and diverse community with an estimated 63 species, and a high sponge percent coverage (~35%). Several of the mesophotic species are documented for the first time from the Levant basin, while others might be novel species. Here we identified over 100 sponge species along the Mediterranean coast of Israel, 33 of which were sampled from the mesophotic sponge ground. The updated sponge list supports the hypothesis that the Levantine sponge diversity is not as species-poor, compared to other parts of the Mediterranean Sea, as has previously been considered. In addition, shallow and mesophotic sponge community compositions were found to only partially overlap. Moreover, the latter harbors some species that have disappeared from the shallow habitats, and only a few species thrive along the entire depth range. We suggest that mesophotic sponge grounds may serve as refugia for species stressed by the rising temperatures in shallow waters and should be protected from anthropogenic influences such as oil and gas drilling.
Mediterranean
Ecology
Molecular systematics, Molecular biology
Systematics, Taxonomy
Molecular systematics, Molecular biology
Systematics, Taxonomy
Date
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Ircinia variabilis (Schmidt, 1862) (additional source)
