Projekter pr. år
an alternative approach, Taylor's power law, to data on spatial and temporal distribution of 9 dominating benthic invertebrate species from two study areas, the estuaries Odense Fjord and Roskilde Fjord, Denmark. The slope (b) obtained fromthe power relationship of sample variance (s2) versusmean (μ) appears to be species-specific and independent of location and time. It ranges from a low of ~1 for large-bodied (>1 mg AFDW) species (e.g. Marenzelleria viridis, Nereis diversicolor) to a high of 1.6–1.9 for small-bodied (b1 mgAFDW) species
(e.g. Pygospio elegans and Tubificoides benedii). Accordingly, b is apparently a valuable species-specific dispersion index based on biological factors such as behavior and intraspecific interactions. Thus, at the examined spatial scale, the more intense intraspecific interactions (e.g. territoriality) cause less aggregated distribution patterns among large- than small-bodied invertebrates. The species-specific interactions seem sufficiently strong to override environmental influences (e.g. water depth and sediment type). The strong linear relationship between the slope b and intercept log(a) from the power relationship is remarkably similar for all surveys providing a common slope of−1.63 with the present sampling approach.We suggest that this relationship is an inherent characteristic of Taylor's power law, and that b as a dispersion index may be biased by e.g. sampling errorswhen this relationship is weak. The correlation strength between b and log(a) could therefore be envisioned as a data quality check.
|Tidsskrift||Journal of Sea Research|
|Status||Udgivet - 2013|
- benthic fauna
- population biology
- marine ecology
REELGRASS: Key parameters and processes affecting the re-establishment of eelgrass in estuaries and coastal waters
Flindt, M., Sand-Jensen, K., Nielsen, S. L., Kristensen, E., Borum, J., Olesen, B., Kock Rasmussen, E., Pedersen, M. F., Banta, G. T., Bøgh Pedersen, C., Krause-Jensen, D., Christensen, P. B., Holmer, M., Thamdrup, B., Bundgaard Madsen, H., Holmboe, N., Hjort Jensen, M. & Lumborg, U.
02/01/2008 → 31/12/2011
Projekter: Projekt › Forskning