Trofic regulation and spatial structuring of the pelagic ...
agenda 09-10.30 Innleding Benjamin Planque+wp ledere legger fram databehovene for sin wp 10.30-11 Nils Olav Handegard: Hvilken nytte kan Sea2data, Admar og BarEcoRe ha av hverandre? 11-11.30 Helge Sagen: Hvordan kan NMD bidra?- hvilke data er tilgjengelig Lunsj i kantina 12-12.30 Geir Odd Johansen fishexchange databasen -dataflyt 12.30-14 Diskusjon: ansvarsfordeling/flaskehalser o.l. BarEcoRe WP1 Fish and benthos communities, past changes and regime shifts Edda Johannesen Maria Fossheim, Lis Lindal.Jrgensen, Elena Eriksen Thomas de Lange Wenneck, Herdis Langy, Trond Thangstad
BarEcoRe (Barents Sea Ecosystem Resilience under global environmental change) aim at: Assessing effects of climate warming on: the structure, dynamics and resilience of the BS ecosystem, integrated with the effect of fishery WP 1 adress the spatio-temporal variation in the fish and bentos communities in the Barents Sea What are the dominant processes that control the community structure of fish and benthos in the Barents Sea? How can we predict the possible future the community structure of
fish and benthos under anticipated future climate and fishing pressures? Benthos communities (data integrated from period 2006-2009 bottom trawl) Fish communities 2007 bottom trawl Data Bottom trawl surveys (campelen): Main surveys Temporal coverage Responsible Ecosystem survey
(present coverage) Green Shrimp survey - strata A-F covered in April/May - G+H covered in August Winter survey: Yellow: coverage 1981-1993 Grey: coverage 1994-2010 Red line: div between Russia and Norway Winter survey demersal stations 1981-2004 red: commercial vessels
- blue: research vessels Barents Sea fish community 3070 stations, 79 taxa 15 10 5 ? 0 Species richness
Species richness 20 Shrimp surveys 1980 1983 1986 1989
1992 1995 Year 1998 2001 2004 2007 Surveys at the IMR:
From single species to ecosystem surveys Problem: survey design not optimal for stock assessment, but compromise between several purposes (also compilation of many purposes more motivated by economy than ecology.?) Benefit: study relationships What has been sampled? Survey: Shrimp survey
improved ident. excellent ident. from 2007 Shrimp: since 1981 since 2005 yes Benthos groups:
2003 BS 2004 BS & Sv. no IMR/PINRO all stations since 2006 Benthos species: 2003 BS 2004 BS & Sv. no IMR/PINRO some stas since 2006
Other: CTD/tempr: SCANMAR sensor yes since 1992 yes Plankton: no no
biomass data wp2/mocness Acoustics: Some years yes yes Fish and bentos data ecosystem survey: Benthos species: -around 476 taxa (337 to species level) were found (06-08) out of >3000 -difficult species has been checked by lab work or digital immages Fish species:
- around 90 found at the survey out of ca 200 recorded for the BS - difficult species checked in lab since 2007 A lot of work in data preparation and quality check -Names, conversion of Russian data, find probably mis-identifiaction based on posistion, pooling of difficult groups etc. For fish done in cooperation between PINRO and Bergen Museum -Fish atlas ecosystem survey 2004-2009 (due end of this year) -data set basis for paper on fish community in the BS, benthos and fish community comparison Winter survey Report Shrimp survey
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