NDLI: How does the proliferation of the coral-killing sponge Terpios hoshinota affect benthic community structure on coral reefs?

Content Provider	Springer Nature Link
Author	Elliott, Jennifer Patterson, Mark Summers, Natalie Miternique, Céline Montocchio, Emma Vitry, Eugene
Copyright Year	2016
Abstract	Terpios hoshinota is an encrusting sponge and a fierce space competitor. It kills stony corals by overgrowing them and can impact reefs on the square kilometer scale. We investigated an outbreak of T. hoshinota in 2014 at the island of Mauritius to determine its impacts on coral community structure. Surveys were conducted at the putative outbreak center, an adjacent area, and around the island to determine the extent of spread of the sponge and which organisms it impacted. In addition, quadrats were monitored for 5 months (July–December) to measure the spreading rates of T. hoshinota and Acropora austera in areas both with and without T. hoshinota. The photosynthetic capabilities of T. hoshinota and A. austera were also measured. Terpios hoshinota was well established, covering 13% of an estimated 416 m2 of available hard coral substrate at the putative outbreak center, and 10% of an estimated 588 m2 of available hard coral substrate at the adjacent area. The sponge was observed at only one other site around Mauritius. Terpios hoshinota and A. austera increased their planar areas by 26.9 and 13.9%, respectively, over five months. No new colonies of T. hoshinota were recorded in adjacent sponge-free control areas, suggesting that sponge recruitment is very low during austral winter and spring. The sponge was observed to overgrow five stony corals; however, it showed a preference for branching corals, especially A. austera. This is the first time that a statistically significant coral substrate preference by T. hoshinota has been reported. Terpios hoshinota also had a significantly higher photosynthetic capacity than A. austera at irradiance >500 μmol photons m−2 s−1, a possible explanation for its high spreading rate. We discuss the long-term implications of the proliferation of T. hoshinota on community structure and dynamics of our study site.
Starting Page	1083
Ending Page	1095
Page Count	13
File Format	PDF
ISSN	07224028
Journal	Coral Reefs
Volume Number	35
Issue Number	3
e-ISSN	14320975
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-03-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mauritius Encrusting sponges Competition Photosynthesis nMDS Freshwater & Marine Ecology Oceanography
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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