Ecological network indicators of ecosystem status and change in the Baltic Sea

Maciej T Tomczak; Johanna J Heymans; Johanna Yletyinen; Susa Niiranen; Saskia Otto; Thorsten Blenckner

doi:10.1371/journal.pone.0075439

Ecological network indicators of ecosystem status and change in the Baltic Sea

Maciej T Tomczak, Johanna J Heymans, Johanna Yletyinen, Susa Niiranen, Saskia Otto, Thorsten Blenckner

SAMS UHI

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Abstract

Several marine ecosystems under anthropogenic pressure have experienced shifts from one ecological state to another. In the central Baltic Sea, the regime shift of the 1980s has been associated with food-web reorganization and redirection of
energy flow pathways. These long-term dynamics from 1974 to 2006 have been simulated here using a food-web model forced by climate and fishing. Ecological network analysis was performed to calculate indices of ecosystem change. The
model replicated the regime shift. The analyses of indicators suggested that the system¿s resilience was higher prior to 1988 and lower thereafter. The ecosystem topology also changed from a web-like structure to a linearized food-web.

Original language	English
Number of pages	11
Journal	PLoS ONE
Volume	8
Issue number	10
Early online date	8 Oct 2013
DOIs	https://doi.org/10.1371/journal.pone.0075439
Publication status	Published - 8 Oct 2013

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10.1371/journal.pone.0075439Licence: CC BY

GEN3576e_Tomczak et al 2013Submitted manuscript, 1.8 MBLicence: CC BY

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AU - Otto, Saskia

AU - Blenckner, Thorsten

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AB - Several marine ecosystems under anthropogenic pressure have experienced shifts from one ecological state to another. In the central Baltic Sea, the regime shift of the 1980s has been associated with food-web reorganization and redirection ofenergy flow pathways. These long-term dynamics from 1974 to 2006 have been simulated here using a food-web model forced by climate and fishing. Ecological network analysis was performed to calculate indices of ecosystem change. Themodel replicated the regime shift. The analyses of indicators suggested that the system¿s resilience was higher prior to 1988 and lower thereafter. The ecosystem topology also changed from a web-like structure to a linearized food-web.

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Ecological network indicators of ecosystem status and change in the Baltic Sea

Abstract

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