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BarEcoRe – commentaries and thoughts

BarEcoRe – commentaries and thoughts. David Grémillet and Thierry Boulinier Spatial Ecology of Populations Centre for Functional and Evolutionary Ecology CNRS Montpellier. Who are we?. My general interests: In spatial population ecology , from individual behaviour to community dynamics

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BarEcoRe – commentaries and thoughts

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  1. BarEcoRe – commentaries and thoughts DavidGrémillet and Thierry Boulinier Spatial Ecology of Populations Centre for Functional and Evolutionary Ecology CNRS Montpellier

  2. Who are we? My general interests: In spatial population ecology, from individual behaviour to community dynamics Dispersal and metapopulation/metacommunity dynamics My main models systems: - Arctic seabirds and their parasites, notably since 1998 on Hornøya, small island of the Barents sea (at the tip of Varanger pennisula). - Animal communities (forest birds, coastal fish) Thierry BOULINIER CNRS, Montpellier, France

  3. My main approaches/tools: Data analyses (analyses of population/community dynamics parameters accounting for heterogeneity in detection probabilities, basic spatial analyses) Field work (monitoring through capture-mark-recapture, immuno-ecology issues + field experiments, notably recently involving tracking of seabird prospecting/foraging movements) Thierry BOULINIER CNRS, Montpellier, France Kittiwake PTT track, June 2010 Spatial scales of prospecting/foraging/dispersing ?

  4. Thierry BOULINIER CNRS, Montpellier, France My ‘vision’ of BarEcoRe: Very nice ecosystem based approach of important issues

  5. Thierry BOULINIER CNRS, Montpellier, France • My ‘vision’ of BarEcoRe: • Very nice ecosystem based approach of important issues • Potential questions: • How will parameters of changes of community composition (e.g., local extinction and turnover rates) be considered/estimated ? • (problem of heterogeneity in species detectability)

  6. Thierry BOULINIER CNRS, Montpellier, France • My ‘vision’ of BarEcoRe: • Very nice ecosystem based approach of important issues • Potential questions: • How will parameters of changes of community composition (e.g., local extinction and turnover rates) be considered/estimated ? • (problem of heterogeneity in species detectability) • How will spatial issues be considered ? • - Accounting for statistical non-independance among sampled areas ? (spatial regression ?) • - Role of dispersal and habitat selection ? (at what spatial • scales population/community processes are occurring ?)

  7. David Grémillet • My general interests: • Seabird foraging behaviour and ecophysiology with the aim of understanding their responses to environmental change e.g. climate and fisheries • My main models systems: • Seabirds of the North Atlantic • (including the Barents Sea) ) • - Seabirds of the Benguela upwelling

  8. Study sites Studying a seabird community… …along a latitudinal gradient. David GREMILLET l INEE

  9. Main approches and tools - Biotelemetry Tracking the winter movements of guillemots from the Barents Sea David GREMILLET l INEE

  10. Main approches and tools - Bioenergetics David GREMILLET l INEE

  11. Comments upon BarEcoRe • Strengths: • Extremely relevant theme • Most data collection is already performed • The objectives are broad, yet still reasonable • Some redundancy ensuring sufficient stability? • Weaknesses: • Mainly focused on fish and benthos, hence (with exception of WP2) ignoring mammals and seabirds • WP2 is a project within the project • Lack of a broader perspective David GREMILLET l INEE

  12. Comments upon BarEcoRe • Opportunities: • Links with further other projects (e.g. SEAPOP and BEST) • Better consideration of all taxa? • Introduction of mecanistic models allowing projections beyond observed range • Definition of ‘operational’ ecosystem indicators and/or sentinels……such as seabirds? • Threats: • Redundancy of WP2 with WP3 • Lack of clear output in terms of operational indicators and clear reconmandations • Lack of knowledge about large-scale processes (dispersal, immigration/emigration, invasions). David GREMILLET l INEE

  13. References: Bering Sea Project: http://bsierp.nprb.org/index.html Shannon et al. (2009) Comparing data-based indicators across upwelling and comparable systems for communicating ecosystem states and trends. Ices Journal of Marine Science. doi:10.1093/icesjms/fsp270 David GREMILLET l INEE

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