نتایج جستجو برای: phytoplankton dynamics
تعداد نتایج: 450594 فیلتر نتایج به سال:
T he modern era of biological oceanography arguably began in 1978 with the successful launch of the Coastal Zone Color Scanner on the Nimbus 7 satellite. Although limited by today’s standards, the Coastal Zone Color Scanner provided the first glimpse of the complex, beautiful, and difficult-to-sample interactions between single-celled phytoplankton and the turbulent mixing of the surface ocean....
Phytoplankton are key components of aquatic ecosystems, fixing CO2 from the atmosphere through photosynthesis and supporting secondary production, yet relatively little is known about how future global warming might alter their biodiversity and associated ecosystem functioning. Here, we explore how the structure, function, and biodiversity of a planktonic metacommunity was altered after five ye...
Modelling, Analysis and Simulation Population dynamics of sinking phytoplankton in stratified waters
We analyze the predictions of a reaction advection di usion model to pinpoint the nec essary conditions for bloom development of sinking phytoplankton species in strati ed waters This reveals that there are two parameter windows that can sustain sinking phytoplankton a turbulence window and a thermocline depth window The two win dows are delimited by four critical parameters a minimal and maxim...
phytoplanktons are the first bio- indicators of pollution in aquatic ecosystems. phytoplankton assemblage and aquatic ecosystems are always influenced by environmental factors therefore these environmental changes and threats must be understood in any ecosystem. phytoplankton are inexpensive and readily available bio- indicators. in the present study, phytoplankton were used to study the sefid ...
[1] Satellite measurements allow global assessments of phytoplankton concentrations and, from observed temporal changes in biomass, direct access to net biomass accumulation rates (r). For the subarctic Atlantic basin, analysis of annual cycles in r reveals that initiation of the annual blooming phase does not occur in spring after stratification surpasses a critical threshold but rather occurs...
The predicted rise in anthropogenic CO2 emissions will increase CO2 concentrations and decrease seawater pH in the upper ocean. Recent studies have revealed effects of pCO2 induced changes in seawater chemistry on a variety of marine life forms, in particular calcifying organisms. To test whether the predicted increase in pCO2 will directly or indirectly (via changes in phytoplankton dynamics) ...
Parasitism is one of the earlier and common ecological interactions in the nature, occurring in almost all environments. Microbial parasites typically are characterized by their small size, short generation time, and high rates of reproduction, with simple life cycle occurring generally within a single host. They are diverse and ubiquitous in aquatic ecosystems, comprising viruses, prokaryotes,...
MODIS observed phytoplankton dynamics in the Taiwan Strait: an absorption-based analysis S. Shang, Q. Dong, Z. Lee, Y. Li, Y. Xie, and M. Behrenfeld State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, Fujian, China Geosystems Research Institute, Mississippi State University, MS 39529, USA Department of Botany and Plant Pathology, Oregon State University, OR 9...
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