In the upper estuary of Yaquina Bay, Oregon, there is an annual
population explosion of Acartia tonsa, (Dana) a calanoid copepod,
during the months of July, August and September, followed by a rapid
decline to virtual extinction in November. The restricted estuarine
distribution affords an excellent opportunity to study the...
Bi-weekly sampling of zooplankton and environmental parameters was conducted along a cross-shelf transect off the coast of Newport, OR, USA (44.65°N) from 1996 to present. Results have demonstrated the feasibility of using copepod community structure as an early indicator of ecosystem response to seasonal and large scale environmental changes in...