Advanced search
1 file | 448.45 KB Add to list

Limited feeding on bacteria by two intertidal benthic copepod species as revealed by trophic biomarkers

Clio Cnudde (UGent) , Tom Moens (UGent) , Bart Hoste (UGent) , Anne Willems (UGent) and Marleen De Troch (UGent)
Author
Organization
Abstract
Harpacticoids can discriminate between biofilms of different bacterial strains. We investigated whether assimilation of bacteria is selective and whether harpacticoids select the most nutritional bacteria. We specifically focused on the role of bacterial characteristics in copepod food selection. Trophic biomarkers (stable isotopes, fatty acids) were used to test selective assimilation of three bacteria by the harpacticoids Platychelipus littoralis and Delavalia palustris, all isolated from a salt marsh. The bacteria Gramella sp., Jannaschia sp. and Photobacterium sp. with contrasting ribosomal protein and fatty acid contents, were 13C-labelled and offered in a food-patch choice experiment with monospecific and combination (respectively single and two strains per microcosm) treatments. Low assimilation of bacterial carbon and lack of significant FA transfer proved that bacteria were a poor food source for the harpacticoids. Assimilation was copepod species-specific and bacteria strain-specific (preference for Photobacterium). However, only a low degree of selective feeding occurred; it can partly be explained by extracellular metabolites rather than by biochemical content and densities. Finally, the energetic cost of differential bacterivory resulted in a negative fatty acid balance for Platychelipus, while Delavalia showed an improved fatty acid profile and thus a positive response to the low-quality bacterial food.
Keywords
bacterial grazing, fatty acids, stable isotopes, harpacticoid copepods, nutritional quality, selective feeding, microbe:higher organism interactions

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 448.45 KB

Citation

Please use this url to cite or link to this publication:

MLA
Cnudde, Clio, Tom Moens, Bart Hoste, et al. “Limited Feeding on Bacteria by Two Intertidal Benthic Copepod Species as Revealed by Trophic Biomarkers.” ENVIRONMENTAL MICROBIOLOGY REPORTS 5.2 (2013): 301–309. Print.
APA
Cnudde, C., Moens, T., Hoste, B., Willems, A., & De Troch, M. (2013). Limited feeding on bacteria by two intertidal benthic copepod species as revealed by trophic biomarkers. ENVIRONMENTAL MICROBIOLOGY REPORTS, 5(2), 301–309.
Chicago author-date
Cnudde, Clio, Tom Moens, Bart Hoste, Anne Willems, and Marleen De Troch. 2013. “Limited Feeding on Bacteria by Two Intertidal Benthic Copepod Species as Revealed by Trophic Biomarkers.” Environmental Microbiology Reports 5 (2): 301–309.
Chicago author-date (all authors)
Cnudde, Clio, Tom Moens, Bart Hoste, Anne Willems, and Marleen De Troch. 2013. “Limited Feeding on Bacteria by Two Intertidal Benthic Copepod Species as Revealed by Trophic Biomarkers.” Environmental Microbiology Reports 5 (2): 301–309.
Vancouver
1.
Cnudde C, Moens T, Hoste B, Willems A, De Troch M. Limited feeding on bacteria by two intertidal benthic copepod species as revealed by trophic biomarkers. ENVIRONMENTAL MICROBIOLOGY REPORTS. 2013;5(2):301–9.
IEEE
[1]
C. Cnudde, T. Moens, B. Hoste, A. Willems, and M. De Troch, “Limited feeding on bacteria by two intertidal benthic copepod species as revealed by trophic biomarkers,” ENVIRONMENTAL MICROBIOLOGY REPORTS, vol. 5, no. 2, pp. 301–309, 2013.
@article{3126308,
  abstract     = {Harpacticoids can discriminate between biofilms of different bacterial strains. We investigated whether assimilation of bacteria is selective and whether harpacticoids select the most nutritional bacteria. We specifically focused on the role of bacterial characteristics in copepod food selection. Trophic biomarkers (stable isotopes, fatty acids) were used to test selective assimilation of three bacteria by the harpacticoids Platychelipus littoralis and Delavalia palustris, all isolated from a salt marsh. The bacteria Gramella sp., Jannaschia sp. and Photobacterium sp. with contrasting ribosomal protein and fatty acid contents, were 13C-labelled and offered in a food-patch choice experiment with monospecific and combination (respectively single and two strains per microcosm) treatments.
Low assimilation of bacterial carbon and lack of significant FA transfer proved that bacteria were a poor food source for the harpacticoids. Assimilation was copepod species-specific and bacteria strain-specific (preference for Photobacterium). However, only a low degree of selective feeding occurred; it can partly be explained by extracellular metabolites rather than by biochemical content and densities. Finally, the energetic cost of differential bacterivory resulted in a negative fatty acid balance for Platychelipus, while Delavalia showed an improved fatty acid profile and thus a positive response to the low-quality bacterial food.},
  author       = {Cnudde, Clio and Moens, Tom and Hoste, Bart and Willems, Anne and De Troch, Marleen},
  issn         = {1758-2229},
  journal      = {ENVIRONMENTAL MICROBIOLOGY REPORTS},
  keywords     = {bacterial grazing,fatty acids,stable isotopes,harpacticoid copepods,nutritional quality,selective feeding,microbe:higher organism interactions},
  language     = {eng},
  number       = {2},
  pages        = {301--309},
  title        = {Limited feeding on bacteria by two intertidal benthic copepod species as revealed by trophic biomarkers},
  url          = {http://dx.doi.org/10.1111/1758-2229.12018},
  volume       = {5},
  year         = {2013},
}

Altmetric
View in Altmetric
Web of Science
Times cited: