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Impact of discards of beam trawl fishing on the nematode community from the Tagus estuary (Portugal)

Maria Franco, Maaike Steyaert, HN Cabral, R Tenreiro, L Chambel, Magda Vincx UGent, MJ Costa and Jan Vanaverbeke UGent (2008) MARINE POLLUTION BULLETIN. 56(10). p.1728-1736
abstract
Abstract: The impact of dead discards, originating from beam trawl fishing on the nematode community from the Tagus estuary was investigated in terms of vertical distribution of the dominant nematode groups. Sediment cores were collected from a mud-flat from the Tagus estuary. Crangon crangon (Linnaeus, 1758) carcasses were added to the surface of the cores, simulating the settling of dead discards on the sediment. The vertical distribution of the dominant nematode groups was determined up to 4 cm deep at four different moments in time post deposition (0, 2, 4 and 6 h) and compared to control cores. The C. crangon addition to the sediment led to the formation of black spots and therefore oxygen depleted areas at the sediment surface. The Chromadora/Ptycholaimellus group, normally dominant at the surface layer, migrated downwards due to their high sensibility to toxic conditions. Sabatieria presented the opposite trend and became the dominant group at the surface layer. Since Sabatieria is tolerant to oxygen stressed conditions and high sulphide concentrations, we suggest that it migrated opportunistically towards an unoccupied niche. Daptonema, Metachromadora and Terschellingia did not show any vertical migration, reflecting their tolerance to anoxic and high sulphiclic conditions. Our study showed that an accumulation of dead discards at the sediment surface might therefore alter the nematode community vertical distribution. This effect is apparently closely related to toxic conditions in the sediment, induced by the deposition of C. crangon at the sediment surface. These alterations might be temporal and reflect an adaptation of the nematode community to dynamic intertidal environments. (C) 2008 Elsevier Ltd. All rights reserved.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
keyword
LABORATORY EXPERIMENTS, INTERTIDAL NEMATODES, NORTH-SEA, VERTICAL-DISTRIBUTION, BACTERIVOROUS NEMATODES, ORGANIC-MATTER, Tagus estuary, Crangon crangon, Bycatch, Nematodes, Sabatieria, MARINE NEMATODES, TIDAL-FLAT, SEDIMENT, PROFILES
journal title
MARINE POLLUTION BULLETIN
Mar. Pollut. Bull.
volume
56
issue
10
pages
1728 - 1736
Web of Science type
Article
Web of Science id
000260745300016
JCR category
MARINE & FRESHWATER BIOLOGY
JCR impact factor
2.562 (2008)
JCR rank
13/87 (2008)
JCR quartile
1 (2008)
ISSN
0025-326X
DOI
10.1016/j.marpolbul.2008.07.003
language
English
UGent publication?
yes
classification
A1
id
662874
handle
http://hdl.handle.net/1854/LU-662874
date created
2009-05-20 14:56:49
date last changed
2009-05-26 13:25:08
@article{662874,
  abstract     = {Abstract: The impact of dead discards, originating from beam trawl fishing on the nematode community from the Tagus estuary was investigated in terms of vertical distribution of the dominant nematode groups. Sediment cores were collected from a mud-flat from the Tagus estuary. Crangon crangon (Linnaeus, 1758) carcasses were added to the surface of the cores, simulating the settling of dead discards on the sediment. The vertical distribution of the dominant nematode groups was determined up to 4 cm deep at four different moments in time post deposition (0, 2, 4 and 6 h) and compared to control cores. The C. crangon addition to the sediment led to the formation of black spots and therefore oxygen depleted areas at the sediment surface. The Chromadora/Ptycholaimellus group, normally dominant at the surface layer, migrated downwards due to their high sensibility to toxic conditions. Sabatieria presented the opposite trend and became the dominant group at the surface layer. Since Sabatieria is tolerant to oxygen stressed conditions and high sulphide concentrations, we suggest that it migrated opportunistically towards an unoccupied niche. Daptonema, Metachromadora and Terschellingia did not show any vertical migration, reflecting their tolerance to anoxic and high sulphiclic conditions. Our study showed that an accumulation of dead discards at the sediment surface might therefore alter the nematode community vertical distribution. This effect is apparently closely related to toxic conditions in the sediment, induced by the deposition of C. crangon at the sediment surface. These alterations might be temporal and reflect an adaptation of the nematode community to dynamic intertidal environments. (C) 2008 Elsevier Ltd. All rights reserved.},
  author       = {Franco, Maria and Steyaert, Maaike and Cabral, HN and Tenreiro, R and Chambel, L and Vincx, Magda and Costa, MJ and Vanaverbeke, Jan},
  issn         = {0025-326X},
  journal      = {MARINE POLLUTION BULLETIN},
  keyword      = {LABORATORY EXPERIMENTS,INTERTIDAL NEMATODES,NORTH-SEA,VERTICAL-DISTRIBUTION,BACTERIVOROUS NEMATODES,ORGANIC-MATTER,Tagus estuary,Crangon crangon,Bycatch,Nematodes,Sabatieria,MARINE NEMATODES,TIDAL-FLAT,SEDIMENT,PROFILES},
  language     = {eng},
  number       = {10},
  pages        = {1728--1736},
  title        = {Impact of discards of beam trawl fishing on the nematode community from the Tagus estuary (Portugal)},
  url          = {http://dx.doi.org/10.1016/j.marpolbul.2008.07.003},
  volume       = {56},
  year         = {2008},
}

Chicago
Franco, Maria, Maaike Steyaert, HN Cabral, R Tenreiro, L Chambel, Magda Vincx, MJ Costa, and Jan Vanaverbeke. 2008. “Impact of Discards of Beam Trawl Fishing on the Nematode Community from the Tagus Estuary (Portugal).” Marine Pollution Bulletin 56 (10): 1728–1736.
APA
Franco, Maria, Steyaert, M., Cabral, H., Tenreiro, R., Chambel, L., Vincx, M., Costa, M., et al. (2008). Impact of discards of beam trawl fishing on the nematode community from the Tagus estuary (Portugal). MARINE POLLUTION BULLETIN, 56(10), 1728–1736.
Vancouver
1.
Franco M, Steyaert M, Cabral H, Tenreiro R, Chambel L, Vincx M, et al. Impact of discards of beam trawl fishing on the nematode community from the Tagus estuary (Portugal). MARINE POLLUTION BULLETIN. 2008;56(10):1728–36.
MLA
Franco, Maria, Maaike Steyaert, HN Cabral, et al. “Impact of Discards of Beam Trawl Fishing on the Nematode Community from the Tagus Estuary (Portugal).” MARINE POLLUTION BULLETIN 56.10 (2008): 1728–1736. Print.