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Marine Biology

, Volume 155, Issue 1, pp 79–90 | Cite as

Gradients in biodiversity and macroalgal wrack decomposition rate across a macrotidal, ultradissipative sandy beach

  • B. Urban-Malinga
  • T. Gheskiere
  • S. Degraer
  • S. Derycke
  • K. W. Opalinski
  • T. Moens
Original Paper

Abstract

The decomposition process of, and the meiobenthic and nematode colonization on, stranded macroalgae were studied along a macrotidal, ultradissipative sandy beach gradient at De Panne (Belgium). The horizontal patterns of macro- and meiofaunal densities and diversity in this beach have been well-documented. Defaunated Fucus detritus was buried in situ in litter bags, 10–15 cm under the sediment surface, at seven stations across the beach profile. Colonization by (meio)fauna and organic matter decomposition rates measured as carbon, nitrogen, phosphorus and dry weight loss, were studied after 10, 21 and 52 days of incubation. Algal detritus was colonized mainly by nematodes dominated by Rhabditidae, Sabatieria, Dorylaimoidea, Monhystera, Paracanthonchus and Daptonema. Organic matter weight loss was slowest at the higher and lower shore and fastest in the mid-shore, in line with the horizontal pattern of nematode diversity in the beach sediment. However, there was no consistent relationship between nematode diversity inside the litter bags and organic matter weight loss, prohibiting an unequivocal conclusion on whether the observed parallel between extant nematode diversity and organic matter decomposition rate indicates a causal relationship or follows from the fact that both are governed by the same set of physicochemical conditions.

Keywords

Beach Meiofauna Nematode Community Beach Slope Nematode Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

During the period of the field work and part of the sample analyses, the first author was financed by the European Science Foundation through the LINKECOL programme (Exchange Grant LCEE/2001/19). Additional funding was obtained from Ghent University through BOF-projects 0110600002 and 01GZ0705, and from the Fund for Scientific Research, Flanders (FWO) through projects G.0008.02 and 1.5217.04. N. S.D. and T.M. are postdoctoral fellows with the FWO. Ilse De Mesel provided valuable suggestions on the design and implementation of our experiment. Danielle Schram, Bernard Timmerman, Dirk Van Gansbeke and Annick Vankenhove are gratefully acknowledged for invaluable help upon sampling, C/N-, P- and sediment analyses, and meiofauna elutriation.

Supplementary material

227_2008_1009_MOESM1_ESM.doc (194 kb)
Table 1 (ESM). List of nematode genera recorded in the litter bags and their relative abundances (%) after 10, 21 and 52days of incubation. (DOC 194 kb)

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • B. Urban-Malinga
    • 1
  • T. Gheskiere
    • 2
  • S. Degraer
    • 2
    • 3
  • S. Derycke
    • 2
  • K. W. Opalinski
    • 4
  • T. Moens
    • 2
  1. 1.Department of Fisheries Oceanography and Marine EcologySea Fisheries InstituteGdyniaPoland
  2. 2.Biology Department, Marine Biology SectionGhent UniversityGhentBelgium
  3. 3.Management Unit of the Mathematical Model of the North SeaRoyal Belgian Institute of Natural SciencesBrusselsBelgium
  4. 4.Centre for Ecological ResearchPolish Academy of ScienceŁomiankiPoland

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