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Environmental drivers of nematode abundance and genus composition at two spatial scales on an estuarine intertidal flat

Xiuqin Wu (UGent) , Ann Vanreusel (UGent) , Freija Hauquier (UGent) and Tom Moens (UGent)
(2019) HYDROBIOLOGIA. 846(1). p.193-214
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Abstract
Estuarine intertidal flats are important ecosystems characterized by high primary production of microphytobenthos and high secondary production of macro- and meiofauna, especially nematodes. However, the link between both ecosystem components (microphytobenthos and faunal communities) is not fully established yet. In this study, spatial patterns and drivers of nematode density and genus composition were investigated at two different spatial scales (i.e. meso- and microscale), with drivers including sediment granulometry, inundation period and food availability as indicated by various phytopigments. Our study has shown that specific food sources, as represented by different pigments and measures of freshness, are important drivers of nematode genus composition and densities at both scales, especially for the surface layers of the sediments. These food sources mainly comprise microphytobenthos, but also deposited phytodetritus and zooplankton faecal pellets, a resource which had hitherto been largely overlooked in intertidal flats. Tidal level and grain size also had a more pronounced structuring effect in the surface layer of the sediment, while their assumed larger importance at the mesoscale was not outspoken. At both scales, vertical heterogeneity in nematode assemblages was larger than horizontal variability, which has repercussions for future studies into the spatial variability of nematode assemblages of tidal flats.
Keywords
Microphytobenthos, Sediment granulometry, Mesoscale, Microscale, LIVING MARINE NEMATODES, SANDY-BEACH, TIDAL FLAT, ORGANIC-MATTER, VERTICAL-DISTRIBUTION, SPECIES-DIVERSITY, TROPHIC POSITION, FEEDING ECOLOGY, FINE-SCALE, NORTH-SEA

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Citation

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MLA
Wu, Xiuqin, et al. “Environmental Drivers of Nematode Abundance and Genus Composition at Two Spatial Scales on an Estuarine Intertidal Flat.” HYDROBIOLOGIA, vol. 846, no. 1, 2019, pp. 193–214.
APA
Wu, X., Vanreusel, A., Hauquier, F., & Moens, T. (2019). Environmental drivers of nematode abundance and genus composition at two spatial scales on an estuarine intertidal flat. HYDROBIOLOGIA, 846(1), 193–214.
Chicago author-date
Wu, Xiuqin, Ann Vanreusel, Freija Hauquier, and Tom Moens. 2019. “Environmental Drivers of Nematode Abundance and Genus Composition at Two Spatial Scales on an Estuarine Intertidal Flat.” HYDROBIOLOGIA 846 (1): 193–214.
Chicago author-date (all authors)
Wu, Xiuqin, Ann Vanreusel, Freija Hauquier, and Tom Moens. 2019. “Environmental Drivers of Nematode Abundance and Genus Composition at Two Spatial Scales on an Estuarine Intertidal Flat.” HYDROBIOLOGIA 846 (1): 193–214.
Vancouver
1.
Wu X, Vanreusel A, Hauquier F, Moens T. Environmental drivers of nematode abundance and genus composition at two spatial scales on an estuarine intertidal flat. HYDROBIOLOGIA. 2019;846(1):193–214.
IEEE
[1]
X. Wu, A. Vanreusel, F. Hauquier, and T. Moens, “Environmental drivers of nematode abundance and genus composition at two spatial scales on an estuarine intertidal flat,” HYDROBIOLOGIA, vol. 846, no. 1, pp. 193–214, 2019.
@article{8636630,
  abstract     = {Estuarine intertidal flats are important ecosystems characterized by high primary production of microphytobenthos and high secondary production of macro- and meiofauna, especially nematodes. However, the link between both ecosystem components (microphytobenthos and faunal communities) is not fully established yet. In this study, spatial patterns and drivers of nematode density and genus composition were investigated at two different spatial scales (i.e. meso- and microscale), with drivers including sediment granulometry, inundation period and food availability as indicated by various phytopigments. Our study has shown that specific food sources, as represented by different pigments and measures of freshness, are important drivers of nematode genus composition and densities at both scales, especially for the surface layers of the sediments. These food sources mainly comprise microphytobenthos, but also deposited phytodetritus and zooplankton faecal pellets, a resource which had hitherto been largely overlooked in intertidal flats. Tidal level and grain size also had a more pronounced structuring effect in the surface layer of the sediment, while their assumed larger importance at the mesoscale was not outspoken. At both scales, vertical heterogeneity in nematode assemblages was larger than horizontal variability, which has repercussions for future studies into the spatial variability of nematode assemblages of tidal flats.},
  author       = {Wu, Xiuqin and Vanreusel, Ann and Hauquier, Freija and Moens, Tom},
  issn         = {0018-8158},
  journal      = {HYDROBIOLOGIA},
  keywords     = {Microphytobenthos,Sediment granulometry,Mesoscale,Microscale,LIVING MARINE NEMATODES,SANDY-BEACH,TIDAL FLAT,ORGANIC-MATTER,VERTICAL-DISTRIBUTION,SPECIES-DIVERSITY,TROPHIC POSITION,FEEDING ECOLOGY,FINE-SCALE,NORTH-SEA},
  language     = {eng},
  number       = {1},
  pages        = {193--214},
  title        = {Environmental drivers of nematode abundance and genus composition at two spatial scales on an estuarine intertidal flat},
  url          = {http://dx.doi.org/10.1007/s10750-019-04064-5},
  volume       = {846},
  year         = {2019},
}

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