Risk Assessment for Safe Drinking Water Supplies - Global Drinking Water Management and Conservation - page 116

Table 6.2 Effects matrix summarizing assumed stressors and impacts on endpoints in the Waquoit Bay watershed (Serveiss et al. 2004 )
Stressor Assessment endpoints ranking

Percent
eelgrass

Fin sh
diversity

Scallop
abundance

Anadromous
sh

Wetland
birds

Piping
plovers

Fish/
shell sh

Totals

Chemical pollution 1 1 1 1 1 1 3 9

Altered freshwater ow 1 1 1 2 3 1 1 10

Nutrient enrichment 5 5 5 3 2 1 1 22

Physical alteration of
habitat

2 1 2 1 2 3 1 12

Fishing pressure 1 1 2 3 1 1 1 10
Pathogens 2 1 1 1 1 1 3 10
Totals 12 10 12 11 10 8 10 73
Each cell represents the relative effect of a stressor on an endpoint. The ranking (1 = minor, 5 = severe) re ects experience with the likely effects speci cally
for the Waquoit Bay watershed