Combined, short-term exposure to reduced seawater pH and elevated temperature induces community shifts in an intertidal meiobenthic assemblage
In future global change scenarios the surface ocean will experience continuous acidification and rising temperatures. While effects of both stressors on marine, benthic communities are fairly well studied, consequences of the interaction of both factors remain largely unknown. We performed a short-t...
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ftunivgent:oai:archive.ugent.be:8545087 2023-06-11T04:15:43+02:00 Combined, short-term exposure to reduced seawater pH and elevated temperature induces community shifts in an intertidal meiobenthic assemblage Mevenkamp, Lisa Ong, Ee Zin Van Colen, Carl Vanreusel, Ann Guilini, Katja 2018 application/pdf https://biblio.ugent.be/publication/8545087 http://hdl.handle.net/1854/LU-8545087 https://doi.org/10.1016/j.marenvres.2017.11.002 https://biblio.ugent.be/publication/8545087/file/8545088 eng eng https://biblio.ugent.be/publication/8545087 http://hdl.handle.net/1854/LU-8545087 http://dx.doi.org/10.1016/j.marenvres.2017.11.002 https://biblio.ugent.be/publication/8545087/file/8545088 No license (in copyright) info:eu-repo/semantics/restrictedAccess MARINE ENVIRONMENTAL RESEARCH ISSN: 0141-1136 Biology and Life Sciences Earth and Environmental Sciences Warming Ocean acidification Mortality Nematodes Platyhelminthes Biotic interactions Synergism SEDIMENT NUTRIENT FLUXES CLIMATE-CHANGE CARBON-DIOXIDE THERMAL TOLERANCE TROPHIC RELATIONSHIPS VERTICAL-DISTRIBUTION ANTHROPOGENIC CARBON NEMATODE COMMUNITIES BENTHIC COMMUNITIES journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivgent https://doi.org/10.1016/j.marenvres.2017.11.002 2023-05-10T22:29:04Z In future global change scenarios the surface ocean will experience continuous acidification and rising temperatures. While effects of both stressors on marine, benthic communities are fairly well studied, consequences of the interaction of both factors remain largely unknown. We performed a short-term microcosm experiment exposing a soft-bottom community from an intertidal flat in the Westerscheldt estuary to two levels of seawater pH (ambient pH(T) = 7.9, reduced pH(T) = 7.5) and temperature (10 degrees C ambient and 13 degrees C elevated temperature) in a crossed design. After 8 weeks, meiobenthic community structure and nematode staining ratios, as a proxy for mortality, were compared between treatments and structural changes were related to the prevailing abiotic conditions in the respective treatments (pore water par, sediment grain size, total organic matter content, total organic carbon and nitrogen content, phytopigment concentrations and carbonate concentration). Pore water par profiles were significantly altered by pH and temperature manipulations and the combination of elevated temperature and reduced pH intensified the already more acidic porewater below the oxic zone. Meiofauna community composition was significantly affected by the combination of reduced pH and elevated temperature resulting in increased densities of predatory Platyhelminthes, reduced densities of Copepoda and Nauplii and complete absence of Gastrotricha compared to the experimental control. Furthermore, nematode staining ratio was elevated when seawater pH was reduced pointing towards reduced degradation rates of dead nematode bodies. The observed synergistic interactions of pH and temperature on meiobenthic communities and abiotic sediment characteristics underline the importance of multistressor experiments when addressing impacts of global change on the marine environment. Article in Journal/Newspaper Ocean acidification Ghent University Academic Bibliography Marine Environmental Research 133 32 44 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences Earth and Environmental Sciences Warming Ocean acidification Mortality Nematodes Platyhelminthes Biotic interactions Synergism SEDIMENT NUTRIENT FLUXES CLIMATE-CHANGE CARBON-DIOXIDE THERMAL TOLERANCE TROPHIC RELATIONSHIPS VERTICAL-DISTRIBUTION ANTHROPOGENIC CARBON NEMATODE COMMUNITIES BENTHIC COMMUNITIES |
spellingShingle |
Biology and Life Sciences Earth and Environmental Sciences Warming Ocean acidification Mortality Nematodes Platyhelminthes Biotic interactions Synergism SEDIMENT NUTRIENT FLUXES CLIMATE-CHANGE CARBON-DIOXIDE THERMAL TOLERANCE TROPHIC RELATIONSHIPS VERTICAL-DISTRIBUTION ANTHROPOGENIC CARBON NEMATODE COMMUNITIES BENTHIC COMMUNITIES Mevenkamp, Lisa Ong, Ee Zin Van Colen, Carl Vanreusel, Ann Guilini, Katja Combined, short-term exposure to reduced seawater pH and elevated temperature induces community shifts in an intertidal meiobenthic assemblage |
topic_facet |
Biology and Life Sciences Earth and Environmental Sciences Warming Ocean acidification Mortality Nematodes Platyhelminthes Biotic interactions Synergism SEDIMENT NUTRIENT FLUXES CLIMATE-CHANGE CARBON-DIOXIDE THERMAL TOLERANCE TROPHIC RELATIONSHIPS VERTICAL-DISTRIBUTION ANTHROPOGENIC CARBON NEMATODE COMMUNITIES BENTHIC COMMUNITIES |
description |
In future global change scenarios the surface ocean will experience continuous acidification and rising temperatures. While effects of both stressors on marine, benthic communities are fairly well studied, consequences of the interaction of both factors remain largely unknown. We performed a short-term microcosm experiment exposing a soft-bottom community from an intertidal flat in the Westerscheldt estuary to two levels of seawater pH (ambient pH(T) = 7.9, reduced pH(T) = 7.5) and temperature (10 degrees C ambient and 13 degrees C elevated temperature) in a crossed design. After 8 weeks, meiobenthic community structure and nematode staining ratios, as a proxy for mortality, were compared between treatments and structural changes were related to the prevailing abiotic conditions in the respective treatments (pore water par, sediment grain size, total organic matter content, total organic carbon and nitrogen content, phytopigment concentrations and carbonate concentration). Pore water par profiles were significantly altered by pH and temperature manipulations and the combination of elevated temperature and reduced pH intensified the already more acidic porewater below the oxic zone. Meiofauna community composition was significantly affected by the combination of reduced pH and elevated temperature resulting in increased densities of predatory Platyhelminthes, reduced densities of Copepoda and Nauplii and complete absence of Gastrotricha compared to the experimental control. Furthermore, nematode staining ratio was elevated when seawater pH was reduced pointing towards reduced degradation rates of dead nematode bodies. The observed synergistic interactions of pH and temperature on meiobenthic communities and abiotic sediment characteristics underline the importance of multistressor experiments when addressing impacts of global change on the marine environment. |
format |
Article in Journal/Newspaper |
author |
Mevenkamp, Lisa Ong, Ee Zin Van Colen, Carl Vanreusel, Ann Guilini, Katja |
author_facet |
Mevenkamp, Lisa Ong, Ee Zin Van Colen, Carl Vanreusel, Ann Guilini, Katja |
author_sort |
Mevenkamp, Lisa |
title |
Combined, short-term exposure to reduced seawater pH and elevated temperature induces community shifts in an intertidal meiobenthic assemblage |
title_short |
Combined, short-term exposure to reduced seawater pH and elevated temperature induces community shifts in an intertidal meiobenthic assemblage |
title_full |
Combined, short-term exposure to reduced seawater pH and elevated temperature induces community shifts in an intertidal meiobenthic assemblage |
title_fullStr |
Combined, short-term exposure to reduced seawater pH and elevated temperature induces community shifts in an intertidal meiobenthic assemblage |
title_full_unstemmed |
Combined, short-term exposure to reduced seawater pH and elevated temperature induces community shifts in an intertidal meiobenthic assemblage |
title_sort |
combined, short-term exposure to reduced seawater ph and elevated temperature induces community shifts in an intertidal meiobenthic assemblage |
publishDate |
2018 |
url |
https://biblio.ugent.be/publication/8545087 http://hdl.handle.net/1854/LU-8545087 https://doi.org/10.1016/j.marenvres.2017.11.002 https://biblio.ugent.be/publication/8545087/file/8545088 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
MARINE ENVIRONMENTAL RESEARCH ISSN: 0141-1136 |
op_relation |
https://biblio.ugent.be/publication/8545087 http://hdl.handle.net/1854/LU-8545087 http://dx.doi.org/10.1016/j.marenvres.2017.11.002 https://biblio.ugent.be/publication/8545087/file/8545088 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.marenvres.2017.11.002 |
container_title |
Marine Environmental Research |
container_volume |
133 |
container_start_page |
32 |
op_container_end_page |
44 |
_version_ |
1768372753422876672 |