Diversity of calanoid copepods in the North Atlantic and adjacent seas: species associations and biogeography

• Published in: Marine Ecology Progress Series
• Main Authors: Beaugrand, G, IBANEZ, F, Lindley, Ja, Reid, Pc
• Other Authors: Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2002
• Subjects: [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography; North Atlantic; Copepods
• Online Access: https://hal.archives-ouvertes.fr/hal-03483035; https://hal.archives-ouvertes.fr/hal-03483035/document; https://hal.archives-ouvertes.fr/hal-03483035/file/m232p179.pdf; https://doi.org/10.3354/meps232179

International audience Present-day patterns in pelagic biodiversity are the result of the interaction of many factors acting at different scales, Developing an understanding of the processes that regulate the diversity of oceanic ecosystems is thus challenging. In this study, diversity of calanoid copepods was decomposed into species associations by means of the recent `indicator value method' and multivariate analyses. For the first time, at an oceanic basin scale and with a spatial resolution approaching the mesoscale, species associations of calanoid copepods have been identified. Nine species associations were determined and have enabled us, (1) to improve the ecological partitioning of this region, and (2) to identify the main factors that regulate pelagic biodiversity in this area. It is shown that temperature, hydrodynamics, stratification and seasonal variability of the environment are likely to be the main factors contributing to the ecological regulation of diversity of calanoid copepods, The similar geographical pattern evident between currents/water masses and the species associations suggest that the species groups may be used as an environmental indicator to evaluate long-term changes in the marine environment related to climate change and other increasing human-induced influences.