Fish-farming effects on benthic community structure in coastal sediments: Analysis of meiofaunal recovery

Antonio Mazzola, La Rosa, Danovaro, Mirto, Fabiano, Mazzola

Risultato della ricerca: Article

110 Citazioni (Scopus)

Abstract

To study the impact of organic enrichment and high biodeposition caused by intensive fish farming in coastal sediments, meiofaunal samples were collected on a monthly basis between March and October 1997 at two stations of the Gaeta Gulf: One under the Farmocean cage (2000 m3), while the other (the control) was located at about 1 km from an area not impacted by fish farming. The fish farm contained about 120 000 Dicentrarchus labrax (density 18 kg m -3). The most evident changes in the benthic habitat under the cage were a large accumulation of primary organic material (phytopigment concentrations up to 44 μg g-1), changes in sedimentary organic matter composition (increased lipid levels related to the composition of the fish diet), and a strong reduction of redox potential values, which resulted in a significant reduction of meiofaunal penetration depth into the sediments. Organic loads had a clear impact on meiofaunal densities, which were 50% lower under the cage than at the control site (1112 ± 118 and 2160 ± 339 ind. 10 cm-2, respectively). Compared with the control, farm sediments also showed an increased importance of copepods, which dominated the meiofauna together with nematodes (both 39% of the total density) and polychaetes (17%). The removal of the fish farm from the site on July 1997 allowed an analysis to be made of the initial short and medium-term recovery of the assemblages. After two months, meiofaunal densities were closer to the control (about 30% recovery). Community structure recovered only partially to the characteristics typical of the study area, with increased importance of nematodes (about 70% of total density) and reduced copepod contribution, but it was still characterized by a lower number of taxa after four months. These data suggest that meiofaunal recovery after fish farm disturbance is rapid, but far from complete after four months. © 2000 International Council for the Exploration of the Sea.
Lingua originaleEnglish
pagine (da-a)1454-1461
Numero di pagine8
RivistaICES Journal of Marine Science
Volume57
Stato di pubblicazionePublished - 2000

Fingerprint

sediment analysis
coastal sediment
fish culture
benthos
community structure
fish farms
sediments
farm
cages
fish
nematode
Copepoda
Nematoda
meiofauna
Dicentrarchus labrax
redox potential
lipid composition
sediment
Polychaeta
penetration

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Ecology
  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics

Cita questo

Fish-farming effects on benthic community structure in coastal sediments: Analysis of meiofaunal recovery. / Mazzola, Antonio; La Rosa; Danovaro; Mirto; Fabiano; Mazzola.

In: ICES Journal of Marine Science, Vol. 57, 2000, pag. 1454-1461.

Risultato della ricerca: Article

@article{cbf1743ef24847caa6710dc7338837e2,
title = "Fish-farming effects on benthic community structure in coastal sediments: Analysis of meiofaunal recovery",
abstract = "To study the impact of organic enrichment and high biodeposition caused by intensive fish farming in coastal sediments, meiofaunal samples were collected on a monthly basis between March and October 1997 at two stations of the Gaeta Gulf: One under the Farmocean cage (2000 m3), while the other (the control) was located at about 1 km from an area not impacted by fish farming. The fish farm contained about 120 000 Dicentrarchus labrax (density 18 kg m -3). The most evident changes in the benthic habitat under the cage were a large accumulation of primary organic material (phytopigment concentrations up to 44 μg g-1), changes in sedimentary organic matter composition (increased lipid levels related to the composition of the fish diet), and a strong reduction of redox potential values, which resulted in a significant reduction of meiofaunal penetration depth into the sediments. Organic loads had a clear impact on meiofaunal densities, which were 50{\%} lower under the cage than at the control site (1112 ± 118 and 2160 ± 339 ind. 10 cm-2, respectively). Compared with the control, farm sediments also showed an increased importance of copepods, which dominated the meiofauna together with nematodes (both 39{\%} of the total density) and polychaetes (17{\%}). The removal of the fish farm from the site on July 1997 allowed an analysis to be made of the initial short and medium-term recovery of the assemblages. After two months, meiofaunal densities were closer to the control (about 30{\%} recovery). Community structure recovered only partially to the characteristics typical of the study area, with increased importance of nematodes (about 70{\%} of total density) and reduced copepod contribution, but it was still characterized by a lower number of taxa after four months. These data suggest that meiofaunal recovery after fish farm disturbance is rapid, but far from complete after four months. {\circledC} 2000 International Council for the Exploration of the Sea.",
author = "Antonio Mazzola and {La Rosa} and Danovaro and Mirto and Fabiano and Mazzola",
year = "2000",
language = "English",
volume = "57",
pages = "1454--1461",
journal = "ICES Journal of Marine Science",
issn = "1054-3139",
publisher = "Oxford University Press",

}

TY - JOUR

T1 - Fish-farming effects on benthic community structure in coastal sediments: Analysis of meiofaunal recovery

AU - Mazzola, Antonio

AU - La Rosa, null

AU - Danovaro, null

AU - Mirto, null

AU - Fabiano, null

AU - Mazzola, null

PY - 2000

Y1 - 2000

N2 - To study the impact of organic enrichment and high biodeposition caused by intensive fish farming in coastal sediments, meiofaunal samples were collected on a monthly basis between March and October 1997 at two stations of the Gaeta Gulf: One under the Farmocean cage (2000 m3), while the other (the control) was located at about 1 km from an area not impacted by fish farming. The fish farm contained about 120 000 Dicentrarchus labrax (density 18 kg m -3). The most evident changes in the benthic habitat under the cage were a large accumulation of primary organic material (phytopigment concentrations up to 44 μg g-1), changes in sedimentary organic matter composition (increased lipid levels related to the composition of the fish diet), and a strong reduction of redox potential values, which resulted in a significant reduction of meiofaunal penetration depth into the sediments. Organic loads had a clear impact on meiofaunal densities, which were 50% lower under the cage than at the control site (1112 ± 118 and 2160 ± 339 ind. 10 cm-2, respectively). Compared with the control, farm sediments also showed an increased importance of copepods, which dominated the meiofauna together with nematodes (both 39% of the total density) and polychaetes (17%). The removal of the fish farm from the site on July 1997 allowed an analysis to be made of the initial short and medium-term recovery of the assemblages. After two months, meiofaunal densities were closer to the control (about 30% recovery). Community structure recovered only partially to the characteristics typical of the study area, with increased importance of nematodes (about 70% of total density) and reduced copepod contribution, but it was still characterized by a lower number of taxa after four months. These data suggest that meiofaunal recovery after fish farm disturbance is rapid, but far from complete after four months. © 2000 International Council for the Exploration of the Sea.

AB - To study the impact of organic enrichment and high biodeposition caused by intensive fish farming in coastal sediments, meiofaunal samples were collected on a monthly basis between March and October 1997 at two stations of the Gaeta Gulf: One under the Farmocean cage (2000 m3), while the other (the control) was located at about 1 km from an area not impacted by fish farming. The fish farm contained about 120 000 Dicentrarchus labrax (density 18 kg m -3). The most evident changes in the benthic habitat under the cage were a large accumulation of primary organic material (phytopigment concentrations up to 44 μg g-1), changes in sedimentary organic matter composition (increased lipid levels related to the composition of the fish diet), and a strong reduction of redox potential values, which resulted in a significant reduction of meiofaunal penetration depth into the sediments. Organic loads had a clear impact on meiofaunal densities, which were 50% lower under the cage than at the control site (1112 ± 118 and 2160 ± 339 ind. 10 cm-2, respectively). Compared with the control, farm sediments also showed an increased importance of copepods, which dominated the meiofauna together with nematodes (both 39% of the total density) and polychaetes (17%). The removal of the fish farm from the site on July 1997 allowed an analysis to be made of the initial short and medium-term recovery of the assemblages. After two months, meiofaunal densities were closer to the control (about 30% recovery). Community structure recovered only partially to the characteristics typical of the study area, with increased importance of nematodes (about 70% of total density) and reduced copepod contribution, but it was still characterized by a lower number of taxa after four months. These data suggest that meiofaunal recovery after fish farm disturbance is rapid, but far from complete after four months. © 2000 International Council for the Exploration of the Sea.

UR - http://hdl.handle.net/10447/195512

M3 - Article

VL - 57

SP - 1454

EP - 1461

JO - ICES Journal of Marine Science

JF - ICES Journal of Marine Science

SN - 1054-3139

ER -