Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA

Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA

Aggregations of rhodoliths, habitat-forming, free-living coralline red algae, form beds throughout the world’s oceans. On Santa Catalina Island, California, USA, rhodolith beds occur in protected coves where dense networks of moorings support recreational boating activities. The chains and spreader...

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Asıl Yazarlar: Dolinar, Dillon, Steller, Diana, Gabara, Scott, Beckley, Billie, Kim, Ju-Hyoung, Edwards, Matthew
Materyal Türü: Online
Dil:eng
Baskı/Yayın Bilgisi: Iniversidad Autónoma de Baja California 2020
Online Erişim:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3135
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id oai:cienciasmarinas.com.mx:article-3135
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Dolinar, Dillon
Steller, Diana
Gabara, Scott
Beckley, Billie
Kim, Ju-Hyoung
Edwards, Matthew
spellingShingle Dolinar, Dillon
Steller, Diana
Gabara, Scott
Beckley, Billie
Kim, Ju-Hyoung
Edwards, Matthew
Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA
author_facet Dolinar, Dillon
Steller, Diana
Gabara, Scott
Beckley, Billie
Kim, Ju-Hyoung
Edwards, Matthew
author_sort Dolinar, Dillon
title Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA
title_short Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA
title_full Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA
title_fullStr Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA
title_full_unstemmed Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA
title_sort impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from catalina island, usa
description Aggregations of rhodoliths, habitat-forming, free-living coralline red algae, form beds throughout the world’s oceans. On Santa Catalina Island, California, USA, rhodolith beds occur in protected coves where dense networks of moorings support recreational boating activities. The chains and spreader lines associated with these moorings chronically disturb the benthos, crushing the rhodoliths and reducing biodiversity of rhodolith-associated communities. Here, we examine how mooring disturbance affects rhodolith photosynthesis and respiration and characterize rhodolith-associated invertebrate respiration to better understand how this disturbance affects productivity by the ecosystem. To do this, we used a respiration chamber in the laboratory to measure the amount of oxygen produced and/or consumed by undisturbed (intact) rhodoliths, mooring-disturbed (“crushed”) rhodolith fragments, and laboratory-crushed rhodoliths, and the amount of oxygen consumed by the dominant rhodolith-associated invertebrate taxa. Our results indicate that rhodolith maximum net productivity is significantly reduced and rhodolith respiration is significantly increased by mooring disturbance in the field, but that crushing of the rhodolith thalli alone does not result in immediate changes to either of these measures. Rather, it appears that chronic crushing of rhodolith thalli, which results in their mortality and rhodolith habitat degradation, is required to elicit these metabolic changes. In addition, we observed variation in respiration rates among the 5 most commonly observed invertebrate taxa within the Catalina Island rhodolith beds, and scaling these respiration rates by each species’ abundance in the rhodolith beds and in adjacent mooring-disturbed (degraded) habitats indicated that mooring disturbance results in a decrease in community respiration by approximately 2.61 mg O2·m–2·d–1, with individual species contributing between 0.05 mg O2·m–2·d–1 and 1.84 mg O2·m–2·d–1 to this decrease. This study provides insight into the consequences of anthropogenic disturbance on productivity and respiration in these ecologically important habitats.
publisher Iniversidad Autónoma de Baja California
publishDate 2020
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3135
_version_ 1792606985223405568
spelling oai:cienciasmarinas.com.mx:article-31352024-02-28T04:02:19Z Impacts of boat mooring disturbance on productivity and respiration in rhodolith beds from Catalina Island, USA Impactos de las perturbaciones por el atraque de embarcaciones en la productividad y la respiración de los mantos de rodolitos de la isla Catalina, EUA Dolinar, Dillon Steller, Diana Gabara, Scott Beckley, Billie Kim, Ju-Hyoung Edwards, Matthew boat mooring disturbance productivity respiration rhodolith atraque de embarcaciones perturbación productividad respiración rodolito Aggregations of rhodoliths, habitat-forming, free-living coralline red algae, form beds throughout the world’s oceans. On Santa Catalina Island, California, USA, rhodolith beds occur in protected coves where dense networks of moorings support recreational boating activities. The chains and spreader lines associated with these moorings chronically disturb the benthos, crushing the rhodoliths and reducing biodiversity of rhodolith-associated communities. Here, we examine how mooring disturbance affects rhodolith photosynthesis and respiration and characterize rhodolith-associated invertebrate respiration to better understand how this disturbance affects productivity by the ecosystem. To do this, we used a respiration chamber in the laboratory to measure the amount of oxygen produced and/or consumed by undisturbed (intact) rhodoliths, mooring-disturbed (“crushed”) rhodolith fragments, and laboratory-crushed rhodoliths, and the amount of oxygen consumed by the dominant rhodolith-associated invertebrate taxa. Our results indicate that rhodolith maximum net productivity is significantly reduced and rhodolith respiration is significantly increased by mooring disturbance in the field, but that crushing of the rhodolith thalli alone does not result in immediate changes to either of these measures. Rather, it appears that chronic crushing of rhodolith thalli, which results in their mortality and rhodolith habitat degradation, is required to elicit these metabolic changes. In addition, we observed variation in respiration rates among the 5 most commonly observed invertebrate taxa within the Catalina Island rhodolith beds, and scaling these respiration rates by each species’ abundance in the rhodolith beds and in adjacent mooring-disturbed (degraded) habitats indicated that mooring disturbance results in a decrease in community respiration by approximately 2.61 mg O2·m–2·d–1, with individual species contributing between 0.05 mg O2·m–2·d–1 and 1.84 mg O2·m–2·d–1 to this decrease. This study provides insight into the consequences of anthropogenic disturbance on productivity and respiration in these ecologically important habitats. Las agregaciones de rodolitos, algas rojas coralinas de vida libre formadoras de hábitats, forman mantos en todos los océanos del mundo. En la isla Santa Catalina, California, EUA, los mantos de rodolitos se encuentran en ensenadas protegidas donde hay redes de atraques que apoyan las actividades de navegación recreativa. Las cadenas y líneas esparcidoras asociadas a estos atraques perturban crónicamente el bentos, ya que aplastan los rodolitos y reducen la biodiversidad de las comunidades asociadas a los rodolitos. Aquí, examinamos cómo la perturbación por los atraques afecta la fotosíntesis y la respiración de los rodolitos y caracterizamos la respiración de los invertebrados asociados a los rodolitos para comprender mejor cómo esta perturbación afecta la productividad del ecosistema. Para esto, usamos una cámara de respiración en el laboratorio para medir la cantidad de oxígeno producido y/o consumido por los rodolitos no perturbados (intactos), los fragmentos de rodolitos perturbados por atraques (“triturados”) y los rodolitos triturados en el laboratorio, y la cantidad de oxígeno consumido por los taxones de invertebrados dominantes asociados a los rodolitos. Nuestros resultados indican que la perturbación causada por los atraques en el campo redujo significativamente la productividad neta máxima de los rodolitos y aumentó significativamente la respiración de estos, pero que la trituración de los talos de los rodolitos por sí sola no ocasionó cambios inmediatos en ninguna de estas medidas. Por lo contrario, parece que la trituración crónica de los talos de rodolitos, la cual ocasiona su muerte y la degradación de su hábitat, es necesaria para provocar estos cambios metabólicos. Además, observamos variaciones en las tasas de respiración entre los 5 taxones de invertebrados más comúnmente observados dentro de los mantos de rodolitos de la isla Catalina, y la extrapolación de estas tasas de respiración con la abundancia de cada especie en los mantos de rodolitos y en los hábitats adyacentes perturbados por los atraques (degradados) indicó que la perturbación de los atraques ocasiona una disminución en la respiración de la comunidad de aproximadamente 2.61 mg O2·m–2·d–1, con una contribución por especie de entre 0.05 mg O2·m–2·d–1 1.84 mg O2·m–2·d–1 a esta disminución. Este estudio proporciona una perspectiva de las consecuencias de la perturbación antropogénica en la productividad y la respiración en estos hábitats de importancia ecológica. Iniversidad Autónoma de Baja California 2020-12-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf text/xml text/xml https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3135 10.7773/cm.v46i4.3135 Ciencias Marinas; Vol. 46 No. 4 (2020); 253–267 Ciencias Marinas; Vol. 46 Núm. 4 (2020); 253–267 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3135/420420510 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3135/420420964 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3135/420420669 Copyright (c) 2020 Ciencias Marinas https://creativecommons.org/licenses/by/4.0

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