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A mechanism for offshore initiation of harmful algal blooms in the coastal Gulf of Maine 总被引:6,自引:0,他引:6
Mcgillicuddy D. J. Jr; Signell R. P.; Stock C. A.; Keafer B. A.; Keller M. D.; Hetland R. D.; Anderson D. M. 《Journal of plankton research》2003,25(9):1131-1138
A combination of observations and model results suggest a mechanismby which coastal blooms of the toxic dinoflagellate Alexandriumfundyense can be initiated from dormant cysts located in offshoresediments. The mechanism arises from the joint effects of organismbehavior and the wind-driven response of a surface-trapped plumeof fresh water originating from riverine sources. During upwelling-favorablewinds, the plume thins vertically and extends offshore; downwellingwinds thicken the plume and confine it to the nearshore region.In the western Gulf of Maine, the offshore extent of the riverplume during upwelling conditions is sufficient to entrain upward-swimmingA. fundyense cells germinated from offshore cyst beds. Subsequentdownwelling conditions then transport those populations towardsthe coast. 相似文献
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