Such organisms need phosphoric and nitric salts for their life and these salts come from onshore and nearshore sediments and are swept into the sea by rivers and estuaries.

• 这些生物需要磷盐和氮盐来维持它们的生命，而磷盐和氮盐则来自由河流和海湾携带人海的向岸和近岸沉积物。