Competition for inorganic nutrients between phytoplankton and bacterioplankton in nutrient manipulated mesocosms
نویسندگان
چکیده
منابع مشابه
Uncoupling of bacterioplankton and phytoplankton production in fresh waters is affected by inorganic nutrient limitation.
Pelagic bacterial production is often positively correlated, or coupled, with primary production through utilization of autotrophically produced dissolved organic carbon. Recent studies indicate that inorganic N or P can directly limit both bacterial and phytoplanktonic growth. Our mesocosm experiments, with whole communities from mesotrophic Calder Lake, test whether this apparent bacterial-al...
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Although it is commonly accepted that dissolved organic carbon (DOC) of algal origin limits bacterial growth in pelagic systems, there arc relatively few empirical studies documenting this effect. Depending on site and season, both organic and inorganic nutrients can limit the growth of freshwater bacteria. By contrast, inorganic nutrients have only recently been implicated as potentially growt...
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Diatoms and dinoflagellates are 2 important groups of phytoplankton that co-exist in the competition for light and nutrients. Following the diatom-dominated spring bloom, the shelf sea subsurface chlorophyll maximum (SCM) is often dominated by motile species of phytoplankton, in particular dinoflagellates and sometimes coccolithophores. Turbulence in shelf seas, driven by surface winds and by t...
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The development of phytoplankton communities was studied in floating enclosures. The enclosures were supplied with either surface water or water from 40 m depth. Nutrients with or without silicate were added in some of the experiments, while others recieved no artificial fertilization. It is shown that diatom dominance occurred irrespective of season if silicate concentration exceeded a thresho...
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Many physiological processes in phytoplankton, including nutrient uptake, vary on a number of temporal scales. Experiments show that the daily cycle in irradiance affects nutrient uptake rates. We used a Droop-based model of resource competition to investigate how diel variability in nutrient uptake influences phytoplankton competition and community structure. The analytical approximation we de...
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ژورنال
عنوان ژورنال: Aquatic Microbial Ecology
سال: 2002
ISSN: 0948-3055,1616-1564
DOI: 10.3354/ame029145