Large-scale spatial heterogeneity of macrozooplankton in Lake of Geneva

• DOI: 10.1139/f99-055
• Publication Date: 2011-04-24T22:46:57Z
• Authors: Bernadette Pinel-...; Catherine Guay; Nadine Angeli; Pierre Legendre; Pierre Dutilleul; Gérard Balvay; Daniel Gerdeaux; Jean Guillard
• Keywords: Biotic component; Spatial heterogeneity; Canonical correspondence analysis

Spatial distribution of macrozooplankton was studied during spring in Lake Geneva to evaluate the influence abiotic (water temperature and stability, nutrients) biotic (bacteria, chlorophyll a, fish biomass) factors on distribution. Mapping spatial analyses revealed that factors, as well crustacean abundances, were structured along a gradient great lake basin. Chlorophyll biomass, bacteria density, cyclopoid abundance, biomass showed more patchy or inshore-offshore patterns. Using canonical analyses, we determined relative contribution environmental species trophic groups based herbivory omnivory/carnivory. The can be explained by small-scale variations gradients with dominant factors. Water ammonium, are main related spring. also cyclopoids. models 35-72% variance total crustaceans, species, groups. However, 28-65% remained unexplained, which may due fine-scale other