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Contrasting macrobenthic activities differentially affect nematode density and diversity in a shallow subtidal marine sediment

Ulrike Braeckman UGent, Carl Van Colen UGent, Karline Soetaert, Magda Vincx UGent and Jan Vanaverbeke UGent (2011) MARINE ECOLOGY-PROGRESS SERIES. 422. p.179-191
abstract
By bioturbating and bio-irrigating the sea floor, macrobenthic organisms transport organic matter and oxygen from the surface to deeper layers, thereby extending the habitat suitable for smaller infauna. Next to these engineering activities, competition, disturbance and predation may also affect the spatial distribution of these smaller organisms. In a controlled laboratory experiment, we studied the effects of 3 functionally different macrobenthic species on the vertical distribution of nematodes. Abra alba, a suspension-deposit feeding bivalve reworking the sediment randomly, Lanice conchilega, a suspension-deposit feeding, tube-irrigating polychaete and Nephtys hombergii, a burrowing predatory polychaete, were added in single-species treatments to sediment from a coastal subtidal station in the Belgian part of the North Sea, sieved (1 mm) to remove macrofauna. After 14 d, the control treatment without macrobenthos was found to be detrimental to nematode density and diversity, which points to the importance of macrobenthic engineering to sustain the smaller components of the food web. Nematode densities were highest at the sediment surface in all treatments, but subsurface density peaks were observed in A. alba (to 3 cm depth) and L. conchilega (to 7 cm depth) microcosms. In the A. alba treatment, the dominant non-selective deposit feeders and the epistrate feeders shifted downwards probably to avoid disturbance and exploitative competition by the bivalve siphons at the surface, while they might have benefited from the faecal pellets deposited in the subsurface. In the L. conchilega treatment, the several dominant species were redistributed over depth layers, indicating polychaete-mediated habitat extension from surface into depth. Nematode communities seemed hardly affected by the presence of N. hombergii. These results reveal that functionally contrasting macrobenthic engineering effects shape nematode communities in different ways, which may maintain the role of nematodes in ecosystem functioning. The present study therefore highlights the need for conservation of macrobenthic functional diversity.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Macrobenthos, Bioturbation, Ecosystem engineering, Nematodes, Vertical distribution, Diversity, Density, BIVALVE MACOMA-BALTHICA, COMMUNITY STRUCTURE, VERTICAL-DISTRIBUTION, PHYTOPLANKTON DEPOSITION, INTERTIDAL NEMATODES, ECOSYSTEM ENGINEERS, LANICE-CONCHILEGA, SOFT-BOTTOM, BIOTURBATION, MEIOBENTHOS
journal title
MARINE ECOLOGY-PROGRESS SERIES
Mar. Ecol.-Prog. Ser.
volume
422
pages
179 - 191
Web of Science type
Article
Web of Science id
000286933500017
JCR category
MARINE & FRESHWATER BIOLOGY
JCR impact factor
2.711 (2011)
JCR rank
12/97 (2011)
JCR quartile
1 (2011)
ISSN
0171-8630
DOI
10.3354/meps08910
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1113156
handle
http://hdl.handle.net/1854/LU-1113156
date created
2011-01-31 18:13:15
date last changed
2011-03-23 16:31:10
@article{1113156,
  abstract     = {By bioturbating and bio-irrigating the sea floor, macrobenthic organisms transport organic matter and oxygen from the surface to deeper layers, thereby extending the habitat suitable for smaller infauna. Next to these engineering activities, competition, disturbance and predation may also affect the spatial distribution of these smaller organisms. In a controlled laboratory experiment, we studied the effects of 3 functionally different macrobenthic species on the vertical distribution of nematodes. Abra alba, a suspension-deposit feeding bivalve reworking the sediment randomly, Lanice conchilega, a suspension-deposit feeding, tube-irrigating polychaete and Nephtys hombergii, a burrowing predatory polychaete, were added in single-species treatments to sediment from a coastal subtidal station in the Belgian part of the North Sea, sieved (1 mm) to remove macrofauna. After 14 d, the control treatment without macrobenthos was found to be detrimental to nematode density and diversity, which points to the importance of macrobenthic engineering to sustain the smaller components of the food web. Nematode densities were highest at the sediment surface in all treatments, but subsurface density peaks were observed in A. alba (to 3 cm depth) and L. conchilega (to 7 cm depth) microcosms. In the A. alba treatment, the dominant non-selective deposit feeders and the epistrate feeders shifted downwards probably to avoid disturbance and exploitative competition by the bivalve siphons at the surface, while they might have benefited from the faecal pellets deposited in the subsurface. In the L. conchilega treatment, the several dominant species were redistributed over depth layers, indicating polychaete-mediated habitat extension from surface into depth. Nematode communities seemed hardly affected by the presence of N. hombergii. These results reveal that functionally contrasting macrobenthic engineering effects shape nematode communities in different ways, which may maintain the role of nematodes in ecosystem functioning. The present study therefore highlights the need for conservation of macrobenthic functional diversity.},
  author       = {Braeckman, Ulrike and Van Colen, Carl and Soetaert, Karline and Vincx, Magda and Vanaverbeke, Jan},
  issn         = {0171-8630},
  journal      = {MARINE ECOLOGY-PROGRESS SERIES},
  keyword      = {Macrobenthos,Bioturbation,Ecosystem engineering,Nematodes,Vertical distribution,Diversity,Density,BIVALVE MACOMA-BALTHICA,COMMUNITY STRUCTURE,VERTICAL-DISTRIBUTION,PHYTOPLANKTON DEPOSITION,INTERTIDAL NEMATODES,ECOSYSTEM ENGINEERS,LANICE-CONCHILEGA,SOFT-BOTTOM,BIOTURBATION,MEIOBENTHOS},
  language     = {eng},
  pages        = {179--191},
  title        = {Contrasting macrobenthic activities differentially affect nematode density and diversity in a shallow subtidal marine sediment},
  url          = {http://dx.doi.org/10.3354/meps08910},
  volume       = {422},
  year         = {2011},
}

Chicago
Braeckman, Ulrike, Carl Van Colen, Karline Soetaert, Magda Vincx, and Jan Vanaverbeke. 2011. “Contrasting Macrobenthic Activities Differentially Affect Nematode Density and Diversity in a Shallow Subtidal Marine Sediment.” Marine Ecology-progress Series 422: 179–191.
APA
Braeckman, U., Van Colen, C., Soetaert, K., Vincx, M., & Vanaverbeke, J. (2011). Contrasting macrobenthic activities differentially affect nematode density and diversity in a shallow subtidal marine sediment. MARINE ECOLOGY-PROGRESS SERIES, 422, 179–191.
Vancouver
1.
Braeckman U, Van Colen C, Soetaert K, Vincx M, Vanaverbeke J. Contrasting macrobenthic activities differentially affect nematode density and diversity in a shallow subtidal marine sediment. MARINE ECOLOGY-PROGRESS SERIES. 2011;422:179–91.
MLA
Braeckman, Ulrike, Carl Van Colen, Karline Soetaert, et al. “Contrasting Macrobenthic Activities Differentially Affect Nematode Density and Diversity in a Shallow Subtidal Marine Sediment.” MARINE ECOLOGY-PROGRESS SERIES 422 (2011): 179–191. Print.