IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research

In:

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ] Printer-friendly version

Biodiversity of three representative groups of the Antarctic Zoobenthos - Coping with Change
www.belspo.be/belspo/fedra/proj.asp?l=nl&COD=SD/BA/02A

More:  Institutes | Publications 
Dutch title: Biodiversiteit van drie groepen representatief voor het Antarctische Zoobenthos - Respons op Verandering
Parent project: Science for a Sustainable Development, more
Reference no: SD/BA/02A
Acronym: BIANZO II
Period: January 2007 till January 2009
Status: Completed

Institutes (8)  Top | Publications 
  • Universiteit Gent; Faculteit Wetenschappen; Vakgroep Biologie; Onderzoeksgroep Mariene Biologie (MARBIOL), more, co-ordinator
  • Koninklijk Belgisch Instituut voor Natuurwetenschappen; Operationele Directie Taxonomie en Fylogenie; Afdeling Recente Invertebraten, more, partner
  • Koninklijk Belgisch Instituut voor Natuurwetenschappen; Operationele Directie Natuurlijk Milieu; Afdeling Zoetwaterbiologie, more, partner
  • Université Libre de Bruxelles; Faculté des Sciences; Département de Biologie des Organismes; Centre Interuniversitaire de Biologie Marine (ULB - UMH); Unité de Biologie Marine (BIOMAR), more, partner
  • Université de Liège; Faculté des Sciences; Département d'Astrophysique, Géophysique et Océanographie; Unité de Thermodynamique des Phénomènes Irréversibles (TPI), more, partner
  • Université de Bourgogne; Biogéosciences, more, partner
  • Belgian Science Policy (BELSPO), more, sponsor
  • Université de Liège; Faculté des Sciences; Département des Sciences et Gestion de l'Environnement; Systématique et Diversité animale, more

Abstract:
Context

BIANZO II is not only a continuation of the research conducted during the BIANZO I (2002-2006) project, which focused mainly on ecology, biodiversity and biogeography. It also expands the research in the context of our changing climate (cf. IPCC Fourth Assessment Report, 2007). As indicated by the subtitle (‘Coping with Change’), the focus here is on the ability of the Antarctic zoobenthos to adapt to a changing environment. BIANZO II directly contributes to the SCAR EBA programme (Evolution and Biodiversity in the Antarctic). It is also accepted as IPY (International Polar Year) activity #391 as a part of CAML (Census of Antarctic Marine Life). The partners are also involved in other IPY projects (ANDEEP-SYSTCO and ClicOPEN) and SCAR-MarBIN.


Project description

Objectives

BIANZOII will investigate biodiversity patterns of the Antarctic zoobenthos and their causal processes for three representative groups of different size categories: nematodes (meiobenthos), amphipods (macrobenthos) and echinoids (megabenthos) (WP 1: NOWBIO). Trophodynamic aspects of these benthic groups and their ability to cope with temperature and temperature-related changes (food composition and availability, pH of the seawater...) will be studied mainly in an experimental approach (WP 2: DYNABIO). Information collected in previous studies and in the first two work packages will be used to initiate the development of a model about the possible changes in the benthic communities due to global environmental change (WP 3: FOREBIO).


Methodology

WP 1: NOWBIO
Most of the material for the analysis of morphology, ecology, diversity, distribution and phylogeny of the Antarctic zoobenthos (e.g. from the Weddell abyssal plain and the Larsen A & B areas) is already available from recent campaigns. Identifications, morphological analyses and taxonomy will be carried out using the appropriate equipment. Molecular phylogeny analyses include sequencing of COI, 16S and 18S rDNA.

WP 2: DYNABIO
Trophic position structure
The trophic position of the Antarctic meiobenthos will be investigated by stable isotope analyses (from frozen multicorer samples) and enrichment experiments with labeled food (sediment cores incubated in the lab). Our knowledge of amphipod trophic position will be refined by gut content analyses, morphological observations, stable isotope analyses and fatty acid analyses. The importance of prokaryotes in their diet will be assessed using epifluorescence, SE microscopy, immunological and DNA techniques, and laboratory experiments. The diet and feeding plasticity of echinoids will be inferred from litterature, preserved wet material, fresh material and experiments on living animals.

Coping with change
Sediment cores will be incubated in the lab under different conditions of temperature, food quantity and quality, in order to assess the ability of the meiobenthos to cope with change. Densities, biomass, nematode community composition and diversity, benthic respiration rates and nutrient fluxes will be measured. Changes in food supply and its effect on macrobenthos will be studied by feeding experiments with amphipods, using different labeled substrates. The effect of trophic stress on the energy budget of amphipods will be assessed by measurements of their energy demand. The impact of sea water acidification on skeletal growth of echinoids and their larval development, will be assessed under different CO2 levels and analyzed by image analysis and SEM.

WP 3: FOREBIO
Only two steps in the development of a biogeographical model will be taken within BIANZO II: (1) the gathering of biological, abiotic and climatic information and (2) defining filters for changes: climate variables and biological variables.


Interaction between the different partners

Direct communication and a close cooperation between the partners will assure the integration of information fr

Publications (2)  Top | Institutes 
  • Raes, M.; Vanreusel, A.; Pasotti, F.; De Broyer, C.; Martin, P.; d'Udekem d'Acoz, C.; Robert, H.; Havermans, C.; de Ridder, C.; Dubois, P.; Dauby, P.; David, B. (2009). Biodiversiteit van drie groepen representatief voor het Antarctisch zoobenthos: respons op veranderingen. BIANZO II Eindverslag fase I samenvatting. Wetenschapsbeleid: Brussel. 7 pp., more
  • Raes, M.; Vanreusel, A.; Pasotti, F.; De Broyer, C.; Martin, P.; d'Udekem d'Acoz, C.; Robert, H.; Havermans, C.; de Ridder, C.; Dubois, P.; Dauby, P.; David, B. (2009). Biodiversity of three representative groups of the Antarctic zoobenthos: Coping with change. BIANZO II Final report phase I. Belgian Science Policy: Brussel. 55 pp., more

 Top | Institutes | Publications