Daily visual counts of medusae near shore in1960–1986 were significantly correlated only withJanuary–June freshwater inputs from the major rivers(streamflow; r²=0.576, P<0.01); May salinity and temperaturewere not significant (Figure 3; Cargo &King, 1990). Freshwater affects medusa abundance bydetermining the salinity, rather than advectingmedusae out of the bay. Salinity also can determinethe time medusae appear in the mesohaline bay, fromMay in dry years to August in unusually wet years(Purcell et al., 1999c).
การแปล กรุณารอสักครู่..