Estimating human impacts on marine ecosystem by the Baltic Sea Impact Index Samuli Korpinen 2.6.2016 Kuva: Ilkka Heikkinen.

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Presentation transcript:

Estimating human impacts on marine ecosystem by the Baltic Sea Impact Index Samuli Korpinen 2.6.2016 Kuva: Ilkka Heikkinen

The BSII formula , where: P: a pressure (scoring 0-1), E: an ecosystem or its component (scoring 0,1), μ: an impact weightfor each PxE combination (scoring 0-4)

Pressure data in BSII Spatial data forced into 5 x 5 km squares An intensity parameter, log-transformed Normalization to 0-1, where maximum value = 1.0 Each pressure is linked to at least one activity

Ecosystem data Can include multiple data layers per grid cell. Benthic cumulative impacts with 1 layer only. Forced to the same grid cells as pressures. Presence or absence (but could be 0-1 probability).

Sensitivity data Now: Habitat sensitivity defined by recoverability and resistance. (Previously: included also ’severity’). Scored as 0, 1, 2, 3 or 4  average. Expert online survey. Literature-based scores.