Results summary

Field and modeling studies in FORWARD

Findings

Shellfish density may be too high for the low concentration of food in the water column;

No differences in food availability were detected between leases that apply gravel and those that do not

Local scale processes

Recommendations

Experiments should be conducted in selected leases, to assess the effects of food supply on clam production and mortality

Findings

Subthemes

The main nutrient sources for the Ria are, in equal parts, loads from WWTP (45% N, 32% P) and diffuse loads from agricultural fertilization (55% N, 68% P);

The WWTP network has experienced significant improvements and can be considered adequate

Recommendations

More information is required, particularly streamflow nutrient concentration measurements in peak flow periods

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