Results 261 to 270 of about 98,652 (303)

Photoacclimation of natural phytoplankton communities

Marine Ecology Progress Series, 2016
Phytoplankton regulate internal pigment concentrations in response to light and nutrient availability. Chlorophyll a to phytoplankton carbon ratios (chl:Cphyto) are commonly reported as a function of growth irradiance (Eg) for evaluating the photoacclimation response of phytoplankton.
JR Graff, TK Westberry, AJ Milligan, MB Brown, G Dall’Olmo, KM Reifel, MJ Behrenfeld   +6 more
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Triclosan alterations of estuarine phytoplankton community structure

Marine Pollution Bulletin, 2017
Antimicrobial additives in pharmaceutical and personal care products are a major environmental concern due to their potential ecological impacts on aquatic ecosystems. Triclosan (TCS) has been used as an antiseptic, disinfectant, and preservative in various media.
James L. Pinckney, Laura Thompson, Sarah Hylton   +2 more
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Nutrient breakpoints for estuarine phytoplankton communities

Limnology and Oceanography, 2020
AbstractNutrient breakpoints are the concentration at which there is a fundamental change in phytoplankton responses to further increases in nutrient loading. The ecological implication is that nutrient breakpoints signal a community transition from a relatively stable state to an alternate or transition state with marked changes in structure and, by ...
James L. Pinckney, Eilea R. Knotts, Krystyn J. Kibler, Erik M. Smith   +3 more
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Trophic Cascades and Phytoplankton Community Structure

Ecology, 1990
Two predators of zooplankton, fish (yellow perch) and larval insects (Chaoborus), were manipulated within in situ mesocosms to assess their indirect effects on phytoplankton. The two predators caused similar reductions in zooplankton size and biomass, and as a consequence, zooplankton grazing rates on phytoplankton.
Michael J. Vanni, David L. Findlay
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The Phytoplankton Community

1979
The phytoplankton community of Lake Lanao is composed of 70 euplanktonic species, including Cyanophyta (12), Euglenophyta (4), Chlorophyta (44), Chrysophyceae (1), Bacillariophyceae (4), Dinophyceae (3), and Cryptophyceae (2) (Fig. 3-1). Composition similar to this appears to be very widespread in tropical lakes that are not highly saline or extremely ...
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Herbivoran impact on phytoplankton community structure

Hydrobiologia, 1991
An enclosure experiment was conducted to assess the effects of a zooplankton elimination on the structure of a phytoplankton community. Phytoplankton biomass and production were higher in grazer-free enclosures, while the productivity per unit biovolume was lower.
Jan-Erik Svensson, Jan A. E. Stenson
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Trait-Based Community Ecology of Phytoplankton

Annual Review of Ecology, Evolution, and Systematics, 2008
Trait-based approaches are increasingly used in ecology. Phytoplankton communities, with a rich history as model systems in community ecology, are ideally suited for applying and further developing these concepts. Here we summarize the essential components of trait-based approaches and review their historical and potential application to illuminating ...
Elena Litchman, Christopher A. Klausmeier   +1 more
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Phytoplankton communities in channel catfish ponds

Hydrobiologia, 1984
Seasonal changes in the quantity and quality of phytoplankton were studied in six channel catfish culture ponds. Chlorophyll a concentrations were generally highest in the summer (averaging >200 μg 1−1) but the highest individual chlorophyll a value recorded (910 μg 1−1) occurred in the winter during a bloom of Dictyosphaerium pulchellum.
C. S. Tucker, S. W. Lloyd
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Community assembly: perspectives from phytoplankton’s studies

Hydrobiologia, 2020
Community assembly (CA) is a topic of growing interest in ecology due to global change, among other reasons. A review of the latter 20 years in plankton CA studies suggests some advancements and drawbacks. Most works deal with groups of same trophic level species and overlook food webs, except the proposal of the PEG model.
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Phytoplankton Communities in Temperate Rivers

2012
The structure of phytoplankton communities was examined seasonally across five rivers with a focus on small cells and their relative importance. Picophytoplankton (0.2-2 μm), previously considered insignificant in rivers, reached densities as high as those observed in lakes and oceans (~ 10e4-10e5 cells/mL). Their relative importance was not a function
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