2 Ergebnisse.

In the United States, approximately two thirds of coastal rivers and bays are moderately to severely degraded by nutrient pollution. Nonetheless, the problem of nutrient pollution is still debated. Rhode Island is in the formative stages of undertaking what many are calling a "grand experiment" in reducing nutrient input to the Narragansett Bay ecosystem, one of the best-studied estuaries in the world. "Science of Ecosystem-based Management: N...

Fishery products are the world's most important source of animal protein, especially for the poor. Meeting the basic human needs for protein foods in the future will be a difficult challenge, especially as demand for fish has doubled since the 1950s. Realistically we can not expect to catch more food from the sea, so we must now turn to farming the waters, not just hunting them. The new challenge for planners is to accelerate aquaculture devel...