منابع مشابه
Responses of Zn assimilation by coastal plankton to macronutrients
We examined the Zn uptake in marine diatoms and its transfer to marine copepods under different nutrient-replete and -deplete conditions. Zn uptake, quantified by measurements of both total cellular and intracellular Zn accumulation in two coastal diatoms (Thalassiosira pseudonana and Thalassiosira weissflogii), was greatly dependent on the ambient nitrogen conditions. Semicontinuous culture ex...
متن کاملModeling Nutrient and Plankton Processes the California Coastal Transition Zone
T H E CALIFORNIA COASTAL TRANSITION ZONE (CTZ) is a region of the North American eastern boundary current system which is associated with cold, nutrientand pigment-rich filaments that originate near the coast and can extend offshore as much as 300 km. On the basis of recent programs, it is now known that these filaments develop and decay over a period of a few weeks, occur most frequently durin...
متن کاملFluctuating silicate:nitrate ratios and coastal plankton food webs.
Marine diatoms require dissolved silicate to form an external shell, and their growth becomes Si-limited when the atomic ratio of silicate to dissolved inorganic nitrogen (Si:DIN) approaches 1:1, also known as the "Redfield ratio." Fundamental changes in the diatom-to-zooplankton-to-higher trophic level food web should occur when this ratio falls below 1:1 and the proportion of diatoms in the p...
متن کاملA critical scale in plankton aggregations across coastal ecosystems
[1] We examined the characteristics of biological patches at four different locations to assess the relationship of patch vertical scale, amplitude, and persistence. In contrast to patches of larger animals, we found that the majority of coherent aggregations of plankton at each site were vertically compressed, with most smaller than 5m vertically. A subset of these layers, often referred to as...
متن کاملPlankton trophic structure and particulate organic carbon production during a coastal downwelling-upwelling cycle
We evaluated plankton trophic structure in a short-term temporal survey performed throughout a downwelling–upwelling cycle at the SE Brazilian coast. Size-fractioned phytoplankton biomass (PB), microzooplankton (MiZA) and mesozooplankton (MeZA) abundances along with primary (PP) and bacterial production (BP) were estimated for 5 consecutive days at a fixed station in the Cabo Frio upwelling cor...
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ژورنال
عنوان ژورنال: Limnology and Oceanography Bulletin
سال: 2014
ISSN: 1539-607X
DOI: 10.1002/lob.201423491a