Scaling human-induced pressures to population level impacts in the marine environment : implementation of the prototype CUMULEO-RAM model

This document describes the implementation of a prototype of the CUMULEO-RAM model in a case study of the Wadden Sea and the Dutch North Sea coastal zone. The prototype is designed to quantify pressures of human activities in the marine environment and translate those pressures to (potential) effects on ecosystem indicators. The prototype was developed for the Netherlands Environmental Assessment Agency (PBL) in order to assess its potential use in strategic management decisions. The implemented prototype scales impacts from human activities to population relevant indicators, although actual population size and distribution are not determined. Focus for future work should be on expansion of the list of included human activities and pressures and not so much to attempt to incorporate population dynamics. The strength of the approach is in the transparency, it can be relatively easily understood. It combines spatial data to get insight in effects on survival and reproduction. The simplicity makes adjustments and extensions uncomplicated. The visual aspects combined with the speed of the calculations makes it a powerful tool to support discussions with experts, and it can guide or focus future research.

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