Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats

We investigated the impact of fish farming on the benthic biota of 2 habitats (seagrass meadows of Posidonia oceanica and non-vegetated soft bottoms), by examining in detail the nematode assemblages, and the effects of organic enrichment on their abundance, diversity (species richness and trophic di...

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Autores principales:	S Mirto, C Arigò, L Genovese, A Pusceddu, C Gambi, R Danovaro
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2014
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/ebb7388363ef4586a31e0aa9215bc588
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spelling	oai:doaj.org-article:ebb7388363ef4586a31e0aa9215bc5882021-11-17T10:07:39ZNematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats1869-215X1869-753410.3354/aei00091https://doaj.org/article/ebb7388363ef4586a31e0aa9215bc5882014-02-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v5/n1/p17-28/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534We investigated the impact of fish farming on the benthic biota of 2 habitats (seagrass meadows of Posidonia oceanica and non-vegetated soft bottoms), by examining in detail the nematode assemblages, and the effects of organic enrichment on their abundance, diversity (species richness and trophic diversity), community structure and individual size. All investigated faunal variables differed significantly between impact and control sediments, except for individual nematode biomass. Nematodes displayed reduced biodiversity beneath the investigated fish farms in both vegetated and non-vegetated habitats. The nematode genera Richtersia, Desmoscolex and Halalaimus were highly sensitive to biodeposition and disappeared almost completely in farm sediments, whereas other genera such as Daptonema and Prochromadorella largely increased their relative abundance. The impact of biodeposition was investigated also in terms of K-dominance curves and functional variables (life strategies as maturity index, and functional [i.e. trophic] diversity) which showed that nematodes are very sensitive to this kind of environmental disturbance. Our results indicate that the analysis of nematode assemblage composition, the life traits of the dominant species and the presence/disappearance of certain nematode species represent a reliable tool for monitoring the quality state of marine sediments exposed to fish-farm organic wastes.S MirtoC ArigòL GenoveseA PuscedduC GambiR DanovaroInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 5, Iss 1, Pp 17-28 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
spellingShingle	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 S Mirto C Arigò L Genovese A Pusceddu C Gambi R Danovaro Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats
description	We investigated the impact of fish farming on the benthic biota of 2 habitats (seagrass meadows of Posidonia oceanica and non-vegetated soft bottoms), by examining in detail the nematode assemblages, and the effects of organic enrichment on their abundance, diversity (species richness and trophic diversity), community structure and individual size. All investigated faunal variables differed significantly between impact and control sediments, except for individual nematode biomass. Nematodes displayed reduced biodiversity beneath the investigated fish farms in both vegetated and non-vegetated habitats. The nematode genera Richtersia, Desmoscolex and Halalaimus were highly sensitive to biodeposition and disappeared almost completely in farm sediments, whereas other genera such as Daptonema and Prochromadorella largely increased their relative abundance. The impact of biodeposition was investigated also in terms of K-dominance curves and functional variables (life strategies as maturity index, and functional [i.e. trophic] diversity) which showed that nematodes are very sensitive to this kind of environmental disturbance. Our results indicate that the analysis of nematode assemblage composition, the life traits of the dominant species and the presence/disappearance of certain nematode species represent a reliable tool for monitoring the quality state of marine sediments exposed to fish-farm organic wastes.
format	article
author	S Mirto C Arigò L Genovese A Pusceddu C Gambi R Danovaro
author_facet	S Mirto C Arigò L Genovese A Pusceddu C Gambi R Danovaro
author_sort	S Mirto
title	Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats
title_short	Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats
title_full	Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats
title_fullStr	Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats
title_full_unstemmed	Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats
title_sort	nematode assemblage response to fish-farm impact in vegetated (posidonia oceanica) and non-vegetated habitats
publisher	Inter-Research
publishDate	2014
url	https://doaj.org/article/ebb7388363ef4586a31e0aa9215bc588
work_keys_str_mv	AT smirto nematodeassemblageresponsetofishfarmimpactinvegetatedposidoniaoceanicaandnonvegetatedhabitats AT carigo nematodeassemblageresponsetofishfarmimpactinvegetatedposidoniaoceanicaandnonvegetatedhabitats AT lgenovese nematodeassemblageresponsetofishfarmimpactinvegetatedposidoniaoceanicaandnonvegetatedhabitats AT apusceddu nematodeassemblageresponsetofishfarmimpactinvegetatedposidoniaoceanicaandnonvegetatedhabitats AT cgambi nematodeassemblageresponsetofishfarmimpactinvegetatedposidoniaoceanicaandnonvegetatedhabitats AT rdanovaro nematodeassemblageresponsetofishfarmimpactinvegetatedposidoniaoceanicaandnonvegetatedhabitats
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Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non-vegetated habitats

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