Seagrass blue carbon stocks and sequestration rates in the Colombian Caribbean

Abstract Seagrass ecosystems rank amongst the most efficient natural carbon sinks on earth, sequestering CO2 through photosynthesis and storing organic carbon (Corg) underneath their soils for millennia and thereby, mitigating climate change. However, estimates of Corg stocks and accumulation rates...

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Autores principales:	Oscar Serrano, Diana Isabel Gómez-López, Laura Sánchez-Valencia, Andres Acosta-Chaparro, Raul Navas-Camacho, Juan González-Corredor, Cristian Salinas, Pere Masque, Cesar A. Bernal, Núria Marbà
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d782522bb4d349798520234cba6408ce
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spelling	oai:doaj.org-article:d782522bb4d349798520234cba6408ce2021-12-02T16:53:11ZSeagrass blue carbon stocks and sequestration rates in the Colombian Caribbean10.1038/s41598-021-90544-52045-2322https://doaj.org/article/d782522bb4d349798520234cba6408ce2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90544-5https://doaj.org/toc/2045-2322Abstract Seagrass ecosystems rank amongst the most efficient natural carbon sinks on earth, sequestering CO2 through photosynthesis and storing organic carbon (Corg) underneath their soils for millennia and thereby, mitigating climate change. However, estimates of Corg stocks and accumulation rates in seagrass meadows (blue carbon) are restricted to few regions, and further information on spatial variability is required to derive robust global estimates. Here we studied soil Corg stocks and accumulation rates in seagrass meadows across the Colombian Caribbean. We estimated that Thalassia testudinum meadows store 241 ± 118 Mg Corg ha−1 (mean ± SD) in the top 1 m-thick soils, accumulated at rates of 122 ± 62 and 15 ± 7 g Corg m−2 year−1 over the last ~ 70 years and up to 2000 years, respectively. The tropical climate of the Caribbean Sea and associated sediment run-off, together with the relatively high primary production of T. testudinum, influencing biotic and abiotic drivers of Corg storage linked to seagrass and soil respiration rates, explains their relatively high Corg stocks and accumulation rates when compared to other meadows globally. Differences in soil Corg storage among Colombian Caribbean regions are largely linked to differences in the relative contribution of Corg sources to the soil Corg pool (seagrass, algae Halimeda tuna, mangrove and seston) and the content of soil particles < 0.016 mm binding Corg and enhancing its preservation. Despite the moderate areal extent of T. testudinum in the Colombian Caribbean (661 km2), it sequesters around 0.3 Tg CO2 year−1, which is equivalent to ~ 0.4% of CO2 emissions from fossil fuels in Colombia. This study adds data from a new region to a growing dataset on seagrass blue carbon and further explores differences in meadow Corg storage based on biotic and abiotic environmental factors, while providing the basis for the implementation of seagrass blue carbon strategies in Colombia.Oscar SerranoDiana Isabel Gómez-LópezLaura Sánchez-ValenciaAndres Acosta-ChaparroRaul Navas-CamachoJuan González-CorredorCristian SalinasPere MasqueCesar A. BernalNúria MarbàNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Oscar Serrano Diana Isabel Gómez-López Laura Sánchez-Valencia Andres Acosta-Chaparro Raul Navas-Camacho Juan González-Corredor Cristian Salinas Pere Masque Cesar A. Bernal Núria Marbà Seagrass blue carbon stocks and sequestration rates in the Colombian Caribbean
description	Abstract Seagrass ecosystems rank amongst the most efficient natural carbon sinks on earth, sequestering CO2 through photosynthesis and storing organic carbon (Corg) underneath their soils for millennia and thereby, mitigating climate change. However, estimates of Corg stocks and accumulation rates in seagrass meadows (blue carbon) are restricted to few regions, and further information on spatial variability is required to derive robust global estimates. Here we studied soil Corg stocks and accumulation rates in seagrass meadows across the Colombian Caribbean. We estimated that Thalassia testudinum meadows store 241 ± 118 Mg Corg ha−1 (mean ± SD) in the top 1 m-thick soils, accumulated at rates of 122 ± 62 and 15 ± 7 g Corg m−2 year−1 over the last ~ 70 years and up to 2000 years, respectively. The tropical climate of the Caribbean Sea and associated sediment run-off, together with the relatively high primary production of T. testudinum, influencing biotic and abiotic drivers of Corg storage linked to seagrass and soil respiration rates, explains their relatively high Corg stocks and accumulation rates when compared to other meadows globally. Differences in soil Corg storage among Colombian Caribbean regions are largely linked to differences in the relative contribution of Corg sources to the soil Corg pool (seagrass, algae Halimeda tuna, mangrove and seston) and the content of soil particles < 0.016 mm binding Corg and enhancing its preservation. Despite the moderate areal extent of T. testudinum in the Colombian Caribbean (661 km2), it sequesters around 0.3 Tg CO2 year−1, which is equivalent to ~ 0.4% of CO2 emissions from fossil fuels in Colombia. This study adds data from a new region to a growing dataset on seagrass blue carbon and further explores differences in meadow Corg storage based on biotic and abiotic environmental factors, while providing the basis for the implementation of seagrass blue carbon strategies in Colombia.
format	article
author	Oscar Serrano Diana Isabel Gómez-López Laura Sánchez-Valencia Andres Acosta-Chaparro Raul Navas-Camacho Juan González-Corredor Cristian Salinas Pere Masque Cesar A. Bernal Núria Marbà
author_facet	Oscar Serrano Diana Isabel Gómez-López Laura Sánchez-Valencia Andres Acosta-Chaparro Raul Navas-Camacho Juan González-Corredor Cristian Salinas Pere Masque Cesar A. Bernal Núria Marbà
author_sort	Oscar Serrano
title	Seagrass blue carbon stocks and sequestration rates in the Colombian Caribbean
title_short	Seagrass blue carbon stocks and sequestration rates in the Colombian Caribbean
title_full	Seagrass blue carbon stocks and sequestration rates in the Colombian Caribbean
title_fullStr	Seagrass blue carbon stocks and sequestration rates in the Colombian Caribbean
title_full_unstemmed	Seagrass blue carbon stocks and sequestration rates in the Colombian Caribbean
title_sort	seagrass blue carbon stocks and sequestration rates in the colombian caribbean
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d782522bb4d349798520234cba6408ce
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Seagrass blue carbon stocks and sequestration rates in the Colombian Caribbean

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