Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs

Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs

Reef ecosystem growth and maintenance is closely related to sea urchin feeding activities. Hence, quantifying the bioerosive capacity of the sea urchin Diadema mexicanum is necessary to evaluate its impact on coral communities and reefs that develop off the Pacific coast of southern Mexico. Sea urch...

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Asıl Yazarlar: López-Pérez, Andrés, López-López, Daniel A
Materyal Türü: info:eu-repo/semantics/article
Dil:eng
Baskı/Yayın Bilgisi: Iniversidad Autónoma de Baja California 2016
Online Erişim:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2586
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id repositorioinstitucional-20.500.12930-7497
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institution Repositorio Institucional
collection DSpace
language eng
description Reef ecosystem growth and maintenance is closely related to sea urchin feeding activities. Hence, quantifying the bioerosive capacity of the sea urchin Diadema mexicanum is necessary to evaluate its impact on coral communities and reefs that develop off the Pacific coast of southern Mexico. Sea urchin density, size, bioerosion rate, and type of carbonate removed were estimated, and the carbonate budget of 15 coral communities and reefs found off Guerrero and Oaxaca was calculated. Sea urchin density (H = 13.4, P = 0.001) and size (H = 139.5, P = 0.000) varied over space and were significantly (density, r2 = 0.79, P = 0.00; size, r2 = 0.28, P = 0.03) related to substrate characteristics. In general, size (test diameter) and density were directly related to rock coverage but inversely related to live coral cover. Carbonate removal was directly related to sea urchin size (<3.4 cm = 0.052 g/ind/d, 3.4–6.1 cm = 0.202 g/ind/d, >6.1 cm = 0.325 g/ind/d). Of the total carbonate removed, 22% corresponded to aragonite and 78% to magnesium calcite, indicating that sea urchin impact on coral reef skeletons is small. When reef carbonate budget was calculated, only 3.1% of the total carbonate deposited by reef corals was removed. The above data indicate that sea urchin feeding activity alone does not compromise reef ecosystem growth and maintenance in southwestern Mexico. Nonetheless, in the near future, the current policy of use and development in and around reef systems may boost the bioerosive impact of D. mexicanum in the area.
format info:eu-repo/semantics/article
author López-Pérez, Andrés
López-López, Daniel A
spellingShingle López-Pérez, Andrés
López-López, Daniel A
Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs
author_facet López-Pérez, Andrés
López-López, Daniel A
author_sort López-Pérez, Andrés
title Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs
title_short Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs
title_full Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs
title_fullStr Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs
title_full_unstemmed Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs
title_sort bioerosive impact of diadema mexicanum on southern mexican pacific coral reefs
publisher Iniversidad Autónoma de Baja California
publishDate 2016
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2586
_version_ 1792609212927311872
spelling repositorioinstitucional-20.500.12930-74972023-05-09T14:30:34Z Bioerosive impact of Diadema mexicanum on southern Mexican Pacific coral reefs Impacto bioerosivo de Diadema mexicanum en arrecifes de coral del Pacífico sur mexicano López-Pérez, Andrés López-López, Daniel A Reef ecosystem growth and maintenance is closely related to sea urchin feeding activities. Hence, quantifying the bioerosive capacity of the sea urchin Diadema mexicanum is necessary to evaluate its impact on coral communities and reefs that develop off the Pacific coast of southern Mexico. Sea urchin density, size, bioerosion rate, and type of carbonate removed were estimated, and the carbonate budget of 15 coral communities and reefs found off Guerrero and Oaxaca was calculated. Sea urchin density (H = 13.4, P = 0.001) and size (H = 139.5, P = 0.000) varied over space and were significantly (density, r2 = 0.79, P = 0.00; size, r2 = 0.28, P = 0.03) related to substrate characteristics. In general, size (test diameter) and density were directly related to rock coverage but inversely related to live coral cover. Carbonate removal was directly related to sea urchin size (<3.4 cm = 0.052 g/ind/d, 3.4–6.1 cm = 0.202 g/ind/d, >6.1 cm = 0.325 g/ind/d). Of the total carbonate removed, 22% corresponded to aragonite and 78% to magnesium calcite, indicating that sea urchin impact on coral reef skeletons is small. When reef carbonate budget was calculated, only 3.1% of the total carbonate deposited by reef corals was removed. The above data indicate that sea urchin feeding activity alone does not compromise reef ecosystem growth and maintenance in southwestern Mexico. Nonetheless, in the near future, the current policy of use and development in and around reef systems may boost the bioerosive impact of D. mexicanum in the area. El crecimiento y mantenimiento de los ecosistemas arrecifales está relacionado con la actividad alimenticia de los erizos de mar. Así, determinar la capacidad bioerosiva del erizo Diadema mexicanum es necesaria para evaluar su impacto en las comunidades y arrecifes de coral que se desarrollan frente a las costas del Pacífico del sur de México. Este estudio evaluó la densidad, la talla y la tasa de bioerosión de D. mexicanum y el tipo de carbonato removido, a partir de lo cual se estimó el balance de carbonatos en 15 comunidades y arrecifes coralinos ubicados frente a Guerrero y Oaxaca. La densidad (H = 13.4, P = 0.001) y la talla (H = 139.5, P = 0.000) de los erizos varió espacialmente y ambos parámetros estuvieron relacionados significativamente (densidad, r2 = 0.79, P = 0.00; talla, r2 = 0.28, P = 0.03) con las características del sustrato. En general, los organismos alcanzaron mayor talla y densidad en sitios con mayor cobertura de roca y baja cobertura de coral vivo. La remoción de carbonatos estuvo directamente relacionada con la talla de los erizos (<3.4 cm = 0.052 g/ind/d, 3.4–6.1 cm = 0.202 g/ind/d, >6.1 cm = 0.325 g/ind/d). Del total de carbonatos removidos, el 22% correspondió a aragonita coralina y el 78% a calcita de magnesio, lo que sugiere que el impacto de los erizos sobre el esqueleto de los corales en la región es mínimo. El balance entre acumulación y remoción de aragonita coralina indicó que esta última fue sólo el 3.1% del total de carbonatos depositado por los corales, indicando que la actividad alimenticia del erizo, por si misma, no compromete el crecimiento y permanencia de las comunidades y arrecifes coralinos en las costas sudoccidentales de México. No obstante, la actual política de uso y de desarrollo en, y alrededor de, los sistemas arrecifales en la región podría exacerbar el efecto bioerosivo de D. mexicanum en un futuro próximo. 2016-03-18 2021-06-03T03:55:28Z 2021-06-03T03:55:28Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2586 10.7773/cm.v42i1.2586 https://hdl.handle.net/20.500.12930/7497 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2586/1585 Copyright (c) 2016 Ciencias Marinas application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 42 No. 1 (2016); 67-79 Ciencias Marinas; Vol. 42 Núm. 1 (2016); 67-79 2395-9053 0185-3880

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