Worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments

Abstract Organic sediments are greenhouse gas and nutrient hotspots. They may display lower methane (CH4) emissions and increase nutrient retention when macrophytes and macrofauna are present, due to oxygen leakage from roots and bioirrigation. We tested this hypothesis via incubations of microcosms...

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Autores principales:	Sara Benelli, Marco Bartoli
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/0e193ca950174dae85a93c3d92b8d757
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spelling	oai:doaj.org-article:0e193ca950174dae85a93c3d92b8d7572021-11-08T07:38:24ZWorms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments2378-224210.1002/lol2.10207https://doaj.org/article/0e193ca950174dae85a93c3d92b8d7572021-12-01T00:00:00Zhttps://doi.org/10.1002/lol2.10207https://doaj.org/toc/2378-2242Abstract Organic sediments are greenhouse gas and nutrient hotspots. They may display lower methane (CH4) emissions and increase nutrient retention when macrophytes and macrofauna are present, due to oxygen leakage from roots and bioirrigation. We tested this hypothesis via incubations of microcosms reproducing four treatments: bare sediment, sediment with oligochaetes, sediment with macrophytes, and sediment with both organisms. Along a 12‐d experiment, CH4 ebullition in bare sediment (470 ± 13 mmol m−2) decreased by 67%, 88%, and 97% in the presence of plants, oligochaetes, and both organisms, respectively. Oligochaetes increased N2 production by ~ 200 mmol N m−2 and nitrate consumption by a factor of 4, whereas macrophytes reduced nitrogen losses by ~ 65 mmol N m−2. All treatments acted as phosphate sink. Results suggest that the maintenance of vegetation and associated macrofauna in organic sediments promotes their combined ecosystem services, resulting in significant reduction of greenhouse gas emission and nutrient release to the water column.Sara BenelliMarco BartoliWileyarticleOceanographyGC1-1581ENLimnology and Oceanography Letters, Vol 6, Iss 6, Pp 329-338 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Oceanography GC1-1581
spellingShingle	Oceanography GC1-1581 Sara Benelli Marco Bartoli Worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments
description	Abstract Organic sediments are greenhouse gas and nutrient hotspots. They may display lower methane (CH4) emissions and increase nutrient retention when macrophytes and macrofauna are present, due to oxygen leakage from roots and bioirrigation. We tested this hypothesis via incubations of microcosms reproducing four treatments: bare sediment, sediment with oligochaetes, sediment with macrophytes, and sediment with both organisms. Along a 12‐d experiment, CH4 ebullition in bare sediment (470 ± 13 mmol m−2) decreased by 67%, 88%, and 97% in the presence of plants, oligochaetes, and both organisms, respectively. Oligochaetes increased N2 production by ~ 200 mmol N m−2 and nitrate consumption by a factor of 4, whereas macrophytes reduced nitrogen losses by ~ 65 mmol N m−2. All treatments acted as phosphate sink. Results suggest that the maintenance of vegetation and associated macrofauna in organic sediments promotes their combined ecosystem services, resulting in significant reduction of greenhouse gas emission and nutrient release to the water column.
format	article
author	Sara Benelli Marco Bartoli
author_facet	Sara Benelli Marco Bartoli
author_sort	Sara Benelli
title	Worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments
title_short	Worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments
title_full	Worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments
title_fullStr	Worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments
title_full_unstemmed	Worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments
title_sort	worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/0e193ca950174dae85a93c3d92b8d757
work_keys_str_mv	AT sarabenelli wormsandsubmersedmacrophytesreducemethanereleaseandincreasenutrientremovalinorganicsediments AT marcobartoli wormsandsubmersedmacrophytesreducemethanereleaseandincreasenutrientremovalinorganicsediments
_version_	1718442878813863936

Worms and submersed macrophytes reduce methane release and increase nutrient removal in organic sediments

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