134
W. Schramm
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Atlantic
Fig. 5.2. Salinity gradient and distribution limits of some key species in the Baltic.
Numbers of species of macrofauna (circles) and of macroalgae (quadrats)
predicted a recycling by mussels of about 250000 t inorganic N, 77 000 t
inorganic P and 97000 t amino-N per year, which is several times higher
than the input from terrestrial sources. In this context, Kautsky and
Wallentinus speculate whether the absence of Mytilus in the Bothnian
Bay and hence a reduction in nutrient regeneration can contribute to the
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