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Descriptor <br />Terrestrial <br />ecosystem <br />Aquatic ecosystem <br />or biota <br />Fish <br />populations <br />Negligible <br />no impact <br />no impact <br />no impact <br />Very low <br />productivity or <br />biomass ( <5%) <br />slight loss in <br />aquatic biota or <br />species diversity <br />( <5%) <br />slight effects on <br />growth or mobility <br />( <5%) <br />Low <br />loss in species or <br />productivity (5- <br />10%) <br />reduction in <br />species or <br />productivity <br />(5 -10%) <br />loss in growth or <br />mobility, <br />reproduction (5- <br />10%) <br />Medium <br />large or long -term <br />loss in species or <br />productivity ( >10%) <br />large reduction in <br />species diversity <br />or productivity <br />( >10%) <br />Sublethal effects <br />on large fish <br />population of fish <br />mortality and loss <br />of reproduction <br />(>10%) <br />High <br />total destruction <br />of terrestrial <br />ecosystem in a <br />large area (>100 <br />ha) <br />total or long -term <br />degradation of a <br />long reach of <br />stream ( >15 km) or <br />a large body of <br />water ( >75 ha) <br />large and permanent <br />fish kill ( >5,000 <br />or one'cohort) or <br />destruction of <br />spawning habitat in <br />a total stream <br />Hazard <br />Assessment <br />Exposure <br />Assessment <br />Consequence <br />Assessment <br />Risk <br />Characterization <br />Negligible <br />to High <br />Negligible to <br />Very Low <br />Negligible <br />Negligible <br />Negligible <br />to High <br />Very Low to Low <br />Negligible to <br />Very Low <br />Very Low <br />Very Low to High <br />Low to Medium <br />Very Low to Low <br />Low <br />Low to High <br />Medium to High <br />Low to Medium <br />Medium <br />Low to High <br />Medium to High <br />Medium to High <br />High <br />1 <br />• <br />28 RISK ASSESSMENT /MANAGEMENT <br />TABLE 3 <br />DESCRIPTIONS FOR CONSEQUENCE ASSESSMENT <br />TABLE 4 <br />BASIS FOR QUALITATIVE RISK CHARACTERISATION <br />