An Ecopath model of the Baltic Sea food web Susa Niiranen Finnish Institute of Marine Research 31st November 2007 Ecem’07, Trieste Photos: ww.fimr.fi, www.sahfos.ac.uk, www2.ecology.su.se/dbbm/images/Saduria%20KL.jpg, www.wildinbritain.co.uk, www.fmnh.helsinki.fi
12
Embed
An Ecopath model of the Baltic Sea food webdoga.ogs.trieste.it/doga/echo/ecem07/RoomC/30Nov/... · 2007. 12. 12. · An Ecopath model of the Baltic Sea food web Author: Susa Niiranen
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Non-living: Redfield (N), P, DOM and POM *Juveniles and adults
Ecosim fish results (1996-2005)
herring sprat
cod cod (F)
Incorporating seasonality
T.longicornis Summer phytoplankton
cod
Spatial resolution (Ecospace)
habitats MPAs
Salinity <4 psu <6 psu >8 psu
Fish nursery areas
Anoxic bottoms <2ml O2/l <0ml O2/
Ecospace runs (10yrs)
Conclusions
Our simulated biomasses of sprat, herring and cod correspond well with real data
Fishing pressure is a strong force controlling the top of the Baltic Sea food web
Seasonality has a large impact on the lower trophic levels of the food web. The effect dampenes down towards top predators Is it vital to include seasonality in long term simulations?
MPAs seem to have a local effect on fish biomasses
Future prospects
Construction of sub-areal models/food webs Inclusion of coastal dynamics Testing with data of a longer time-scale Inclusion of the Baltic Sea temperature and salinity gradients The impact of invasive species and inclusion of them eg. Marenzelleria viridis and Mnemiopsis leidyi (”comb jellyfish”) The integration of FIMR biogeochemical models
Acknowledgements:
Our study has been funded by Evagulf-project (EU Interreg)