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Biodiversity of three representative groups of the Antarctic Zoobenthos - Coping with Change (BIANZO II

Research project SD/BA/02B (Research action SD)

Persons :

Description :


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


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).


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.

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.

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 from different taxa and different size classes. From their expertise, each of the partners will provide new and valuable insights, in this way adding to a more complete view of the interactions between these taxa, their trophic position and the impact of a changing environment.

Link with international programmes

BIANZO II is IPY activity #391. It is part of CAML (Census of Antarctic Marine Life) and contributes to SCAR EBA (Evolution and Biodiversity in the Antarctic). The partners are also involved in other IPY projects: ANDEEP-SYSTCO and ClicOPEN. BIANZO II is also involved in SCAR-MarBIN.

Expected results and/or products

1. An improved knowledge of the composition and biogeography of the target groups in poorly known parts of the Southern Ocean, e.g. the deep-sea and a recently collapsed ice shelf east of the Antarctic Peninsula;
2. An improved knowledge of species diversity and distribution patterns and similarities with oceans worldwide;
3. A better understanding of the trophic position of the three benthic taxa;
4. An evaluation of the share of prokaryotes in benthic energy flows through amphipods;
5. An estimation of metabolic rates of scavenger amphipods based on respiration and excretion measurements;
6. Characterization of the trophic categories of Antarctic echinoids and feeding plasticity of selected taxa;
7. Measuring the effect of seawater acidification on the skeletogenesis of selected taxa.



Ghent University, Marine Biology Section: general coordination. Taxonomy, biodiversity and biogeography of meiobenthos. Enrichment and environmental change experiments.

IRScNB/KBIN: Taxonomy, biogeography and phylogeny of Antarctic amphipods, including study of museum collections. Trophic characterization of amphipods.

ULB: Taxonomy, biogeography and phylogeny of Antarctic echinoids. Trophic characterization of echinoids. Ectosymbiosis. Influence of seawater acidification on skeletogenesis of echinoids.

ULg: Distribution and trophic characterization of amphipods. Energy budget in scavenging Amphipoda. Tolerance of amphipods to temperature-related changes.

Université de Bourgogne: Taxonomy, biogeography and phylogeny of Antarctic echinoids. Ectosymbiosis.

Contact Information


Ann Vanreusel
Ghent University (UGent)
Marine Biology Section
Krijgslaan 281/Building S8
B-9000 Gent
Tel : +32 (0)9 264 85 21
Fax : +32 (0)9 264 85 98


Claude De Broyer (Department of Invertebrates) & Patrick Martin (Section of Freshwater Biology)
Royal Belgian Institute of Natural Sciences (IRScNB/KBIN)
Rue Vautier 29
B-1000 Bruxelles
Tel : +32 (0)2 627 41 27 (CDB) or +32(0)2 627 43 17 (PM)
Fax : +32 (0)2 627 42 77 (CDB) or

Chantal De Ridder
Université Libre de Bruxelles (ULB)
Marine Biology Laboratory, CP 160/15
Avenue F. Roosevelt 50
B-1050 Bruxelles
Tel : +32 (0)2 650 29 66
Fax : +32 (0)2 650 27 96

Patrick Dauby
Université of Liège (ULg)
Département des sciences et gestion de l'environnement
Systématique et diversité animale
BAT. B6 Systématique et diversité animale
allée de la Chimie 3
B-4000 Liège
Tel :+32 (0)4 366 33 22
Fax :+32 (0)4 366 33 25

Bruno David
Université de Bourgogne
6, bd Gabriel
21000 Dijon - France
Tel: +33-3-80-39-63-71
Fax: +33-3-80-39-63-87

Follow-up committee

Angelika Brandt - Universität Hamburg - Germany
Gauthier Chapelle - International Polar Foundation
Bruno Danis - Institut Royal des Sciences Naturelles de Belgique (SCAR-MarBin)
Frank Dehairs - Vrije Universiteit Brussel
Andrew J. Gooday - National Oceanography Center Southampton - UK
Rudy Herman - Ministerie van de Vlaamse Gemeenschap
Hendrik Segers - Institut Royal des Sciences Naturelles de Belgique - Biodiversity Platform

Documentation :

Biodiversity of three representative groups of the Antarctic Zoobenthos Coping with change : final report  Van reusel, An - Martin, Patrick - De Ridder, Chantal ... et al  Brussels : Federal Science Policy, 2012 (SP2498)
[To download]  [To order

Biodiversiteit van drie groepen representatief voor het Antarctische Zoobenthos - Respons op Verandering : samenvatting van de resultaten  Van reusel, An - Martin, Patrick - De Ridder, Chantal ... et al  Brussel : Federaal Wetenschapsbeleid, 2012 (SP2499)
[To download

Biodiversité de trois groupes représentatifs du Zoobenthos Antarctique - Réponse au Changement : résumé des résultats  Van reusel, An - Martin, Patrick - De Ridder, Chantal ... et al  Bruxelles : Politique scientifique fédérale, 2012 (SP2500)
[To download

Biodiversity of three representative groups of the Antarctic Zoobenthos Coping with change : summary of the results  Van reusel, An - Martin, Patrick - De Ridder, Chantal ... et al  Brussels : Federal Science Policy, 2012 (SP2501)
[To download

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