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Loss of reef roughness increases residence time on an idealized coral reef

Through idealized, numerical models this paper investigates flows on a reef geometry which has received significant attention in the literature; a shallow, fringing reef with deeper, shore-ward pools or lagoons. Given identical model geometries and varying only reef flat drag coefficients between mo...

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Autor principal: Lindhart, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9653433/
https://www.ncbi.nlm.nih.gov/pubmed/36371558
http://dx.doi.org/10.1038/s41598-022-24045-4
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author Lindhart, M.
author_facet Lindhart, M.
author_sort Lindhart, M.
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description Through idealized, numerical models this paper investigates flows on a reef geometry which has received significant attention in the literature; a shallow, fringing reef with deeper, shore-ward pools or lagoons. Given identical model geometries and varying only reef flat drag coefficients between model runs ([Formula: see text] ), two distinct circulation patterns emerge. One is related to low reef water levels and high roughness, and efficiently flushes the entire reef system resulting in low residence times (an ‘open reef’). The other is related to high reef water levels and low roughness, and in spite of the development of an offshore undertow, this dynamic is inefficient at flushing the reef-pool system and facilitating exchange flow with offshore waters (a ‘closed reef’). This paper shows that even given indistinguishable geometry and offshore conditions, this information is insufficient to predict reef dynamics, and suggests that reef roughness (and thus reef health) plays a comparable role in determining circulation patterns and residence times. Furthermore, a transition from open to closed or vice versa caused by e.g., a loss of reef roughness or increase in mean sea level could have implications for transport and mixing of nutrients and water masses, as well as larval dispersal.
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spelling pubmed-96534332022-11-15 Loss of reef roughness increases residence time on an idealized coral reef Lindhart, M. Sci Rep Article Through idealized, numerical models this paper investigates flows on a reef geometry which has received significant attention in the literature; a shallow, fringing reef with deeper, shore-ward pools or lagoons. Given identical model geometries and varying only reef flat drag coefficients between model runs ([Formula: see text] ), two distinct circulation patterns emerge. One is related to low reef water levels and high roughness, and efficiently flushes the entire reef system resulting in low residence times (an ‘open reef’). The other is related to high reef water levels and low roughness, and in spite of the development of an offshore undertow, this dynamic is inefficient at flushing the reef-pool system and facilitating exchange flow with offshore waters (a ‘closed reef’). This paper shows that even given indistinguishable geometry and offshore conditions, this information is insufficient to predict reef dynamics, and suggests that reef roughness (and thus reef health) plays a comparable role in determining circulation patterns and residence times. Furthermore, a transition from open to closed or vice versa caused by e.g., a loss of reef roughness or increase in mean sea level could have implications for transport and mixing of nutrients and water masses, as well as larval dispersal. Nature Publishing Group UK 2022-11-12 /pmc/articles/PMC9653433/ /pubmed/36371558 http://dx.doi.org/10.1038/s41598-022-24045-4 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Lindhart, M.
Loss of reef roughness increases residence time on an idealized coral reef
title Loss of reef roughness increases residence time on an idealized coral reef
title_full Loss of reef roughness increases residence time on an idealized coral reef
title_fullStr Loss of reef roughness increases residence time on an idealized coral reef
title_full_unstemmed Loss of reef roughness increases residence time on an idealized coral reef
title_short Loss of reef roughness increases residence time on an idealized coral reef
title_sort loss of reef roughness increases residence time on an idealized coral reef
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9653433/
https://www.ncbi.nlm.nih.gov/pubmed/36371558
http://dx.doi.org/10.1038/s41598-022-24045-4
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