Effects of sediment smothering on the sponge holobiont with implications for dredging management

Abstract One of the ways dredging can affect benthic habitats is through high levels of sediment deposition, which has the potential to smother sessile organisms such as sponges. In order to provide pressure-response values to sedimentation and tease apart the different cause-effect pathways of high...

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Autores principales:	Mari-Carmen Pineda, Brian Strehlow, Miriam Sternel, Alan Duckworth, Joost den Haan, Ross Jones, Nicole S. Webster
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e06dea09eada47e4a1b62e8861d95fa1
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spelling	oai:doaj.org-article:e06dea09eada47e4a1b62e8861d95fa12021-12-02T15:05:12ZEffects of sediment smothering on the sponge holobiont with implications for dredging management10.1038/s41598-017-05243-x2045-2322https://doaj.org/article/e06dea09eada47e4a1b62e8861d95fa12017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05243-xhttps://doaj.org/toc/2045-2322Abstract One of the ways dredging can affect benthic habitats is through high levels of sediment deposition, which has the potential to smother sessile organisms such as sponges. In order to provide pressure-response values to sedimentation and tease apart the different cause-effect pathways of high turbidity, 5 sponge species, including heterotrophic and phototrophic nutritional modes, were exposed for up to 30 d to multiple sediment deposition events, each of which resulted in an initial covering of 80–100% of the surface of the sponges in a layer ~0.5 mm thick. The response of the sponges was examined using a suite of different response variables including growth, respiration, lipid content, community composition of the microbial symbionts, and maximum quantum yield and chlorophyll content of the phototrophic symbionts. Different species showed different mechanisms of sediment rejection and different patterns of sediment clearance. All species survived the treatments, were able to tolerate high levels of partial covering of their surfaces, and for most species the treatment did not alter the health of the sponge holobiont. Results from this study will guide interpretation of experiments examining the combined effects of all three dredging-related pressures, and aid the development of water quality thresholds for impact prediction purposes.Mari-Carmen PinedaBrian StrehlowMiriam SternelAlan DuckworthJoost den HaanRoss JonesNicole S. WebsterNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mari-Carmen Pineda Brian Strehlow Miriam Sternel Alan Duckworth Joost den Haan Ross Jones Nicole S. Webster Effects of sediment smothering on the sponge holobiont with implications for dredging management
description	Abstract One of the ways dredging can affect benthic habitats is through high levels of sediment deposition, which has the potential to smother sessile organisms such as sponges. In order to provide pressure-response values to sedimentation and tease apart the different cause-effect pathways of high turbidity, 5 sponge species, including heterotrophic and phototrophic nutritional modes, were exposed for up to 30 d to multiple sediment deposition events, each of which resulted in an initial covering of 80–100% of the surface of the sponges in a layer ~0.5 mm thick. The response of the sponges was examined using a suite of different response variables including growth, respiration, lipid content, community composition of the microbial symbionts, and maximum quantum yield and chlorophyll content of the phototrophic symbionts. Different species showed different mechanisms of sediment rejection and different patterns of sediment clearance. All species survived the treatments, were able to tolerate high levels of partial covering of their surfaces, and for most species the treatment did not alter the health of the sponge holobiont. Results from this study will guide interpretation of experiments examining the combined effects of all three dredging-related pressures, and aid the development of water quality thresholds for impact prediction purposes.
format	article
author	Mari-Carmen Pineda Brian Strehlow Miriam Sternel Alan Duckworth Joost den Haan Ross Jones Nicole S. Webster
author_facet	Mari-Carmen Pineda Brian Strehlow Miriam Sternel Alan Duckworth Joost den Haan Ross Jones Nicole S. Webster
author_sort	Mari-Carmen Pineda
title	Effects of sediment smothering on the sponge holobiont with implications for dredging management
title_short	Effects of sediment smothering on the sponge holobiont with implications for dredging management
title_full	Effects of sediment smothering on the sponge holobiont with implications for dredging management
title_fullStr	Effects of sediment smothering on the sponge holobiont with implications for dredging management
title_full_unstemmed	Effects of sediment smothering on the sponge holobiont with implications for dredging management
title_sort	effects of sediment smothering on the sponge holobiont with implications for dredging management
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e06dea09eada47e4a1b62e8861d95fa1
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Effects of sediment smothering on the sponge holobiont with implications for dredging management

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