Reviewing evidence of marine ecosystem change off South Africa
Recent changes have been observed in South African marine ecosystems. The main pressures on these ecosystems are fishing, climate change, pollution, ocean acidification and mining. The best long-term datasets are for trends in fishing pressures but there are many gaps, especially for non-commercial...
Published in: | African Journal of Marine Science |
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Language: | English |
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National Inquiry Services Centre
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Online Access: | http://hdl.handle.net/10566/2560 https://doi.org/10.2989/1814232X.2013.836135 |
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ftunivwesterncrr:oai:repository.uwc.ac.za:10566/2560 2023-05-15T17:50:26+02:00 Reviewing evidence of marine ecosystem change off South Africa Moloney, C. L. Fennessy, S. T. Gibbons, Mark J. Roychoudhury, A. Shillington, F. A. von der Heyden, B. P. Watermeyer, K. 2013 application/pdf http://hdl.handle.net/10566/2560 https://doi.org/10.2989/1814232X.2013.836135 en eng National Inquiry Services Centre Moloney, C. K. et al. (2013). Reviewing evidence of marine ecosystem change off South Africa. African Journal of Marine Science, 35(3): 427-448 1814-232x http://hdl.handle.net/10566/2560 http://dx.doi.org/10.2989/1814232X.2013.836135 This is the post-print version of the published article found online at: http://dx.doi.org/10.2989/1814232X.2013.836135 Climate change Fishing Global change Marine ecosystems Ocean acidification Offshore mining Pollution Article 2013 ftunivwesterncrr https://doi.org/10.2989/1814232X.2013.836135 2022-04-26T18:56:08Z Recent changes have been observed in South African marine ecosystems. The main pressures on these ecosystems are fishing, climate change, pollution, ocean acidification and mining. The best long-term datasets are for trends in fishing pressures but there are many gaps, especially for non-commercial species. Fishing pressures have varied over time, depending on the species being caught. Little information exists for trends in other anthropogenic pressures. Field observations of environmental variables are limited in time and space. Remotely sensed satellite data have improved spatial and temporal coverage but the time-series are still too short to distinguish long-term trends from interannual and decadal variability. There are indications of recent cooling on the West and South coasts and warming on the East Coast over a period of 20 - 30 years. Oxygen concentrations on the West Coast have decreased over this period. Observed changes in offshore marine communities include southward and eastward changes in species distributions, changes in abundance of species, and probable alterations in foodweb dynamics. Causes of observed changes are difficult to attribute. Full understanding of marine ecosystem change requires ongoing and effective data collection, management and archiving, and coordination in carrying out ecosystem research. DHET Article in Journal/Newspaper Ocean acidification University of the Western Cap: UWC Research Repository African Journal of Marine Science 35 3 427 448 |
institution |
Open Polar |
collection |
University of the Western Cap: UWC Research Repository |
op_collection_id |
ftunivwesterncrr |
language |
English |
topic |
Climate change Fishing Global change Marine ecosystems Ocean acidification Offshore mining Pollution |
spellingShingle |
Climate change Fishing Global change Marine ecosystems Ocean acidification Offshore mining Pollution Moloney, C. L. Fennessy, S. T. Gibbons, Mark J. Roychoudhury, A. Shillington, F. A. von der Heyden, B. P. Watermeyer, K. Reviewing evidence of marine ecosystem change off South Africa |
topic_facet |
Climate change Fishing Global change Marine ecosystems Ocean acidification Offshore mining Pollution |
description |
Recent changes have been observed in South African marine ecosystems. The main pressures on these ecosystems are fishing, climate change, pollution, ocean acidification and mining. The best long-term datasets are for trends in fishing pressures but there are many gaps, especially for non-commercial species. Fishing pressures have varied over time, depending on the species being caught. Little information exists for trends in other anthropogenic pressures. Field observations of environmental variables are limited in time and space. Remotely sensed satellite data have improved spatial and temporal coverage but the time-series are still too short to distinguish long-term trends from interannual and decadal variability. There are indications of recent cooling on the West and South coasts and warming on the East Coast over a period of 20 - 30 years. Oxygen concentrations on the West Coast have decreased over this period. Observed changes in offshore marine communities include southward and eastward changes in species distributions, changes in abundance of species, and probable alterations in foodweb dynamics. Causes of observed changes are difficult to attribute. Full understanding of marine ecosystem change requires ongoing and effective data collection, management and archiving, and coordination in carrying out ecosystem research. DHET |
format |
Article in Journal/Newspaper |
author |
Moloney, C. L. Fennessy, S. T. Gibbons, Mark J. Roychoudhury, A. Shillington, F. A. von der Heyden, B. P. Watermeyer, K. |
author_facet |
Moloney, C. L. Fennessy, S. T. Gibbons, Mark J. Roychoudhury, A. Shillington, F. A. von der Heyden, B. P. Watermeyer, K. |
author_sort |
Moloney, C. L. |
title |
Reviewing evidence of marine ecosystem change off South Africa |
title_short |
Reviewing evidence of marine ecosystem change off South Africa |
title_full |
Reviewing evidence of marine ecosystem change off South Africa |
title_fullStr |
Reviewing evidence of marine ecosystem change off South Africa |
title_full_unstemmed |
Reviewing evidence of marine ecosystem change off South Africa |
title_sort |
reviewing evidence of marine ecosystem change off south africa |
publisher |
National Inquiry Services Centre |
publishDate |
2013 |
url |
http://hdl.handle.net/10566/2560 https://doi.org/10.2989/1814232X.2013.836135 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Moloney, C. K. et al. (2013). Reviewing evidence of marine ecosystem change off South Africa. African Journal of Marine Science, 35(3): 427-448 1814-232x http://hdl.handle.net/10566/2560 http://dx.doi.org/10.2989/1814232X.2013.836135 |
op_rights |
This is the post-print version of the published article found online at: http://dx.doi.org/10.2989/1814232X.2013.836135 |
op_doi |
https://doi.org/10.2989/1814232X.2013.836135 |
container_title |
African Journal of Marine Science |
container_volume |
35 |
container_issue |
3 |
container_start_page |
427 |
op_container_end_page |
448 |
_version_ |
1766157188408016896 |