Factors Influencing Plankton Community Structure and Production in Freshwater Lakes

1987 ◽  
Vol 44 (3) ◽  
pp. 650-657 ◽  
Author(s):  
J. E. Paloheimo ◽  
R. R. Fulthorpe
Keyword(s):  
Turnover Rate ◽  
Environmental Parameters ◽  
Plankton Community ◽  
Structured Data ◽  
Predator Prey ◽  
Plankton Production ◽  
Community Types ◽  
Value Sets ◽  
Plankton Community Structure ◽  
Kjeldahl Nitrogen

Relationships among biomasses and levels of production of nannoplankton, netplankton, herbivorous zooplankton, and carnivorous zooplankton, as well their dependence on environmental parameters, were studied in 26 central Ontario lakes. Planktonic biomasses were only weakly correlated with each other. Correlations were improved by converting biomasses to production estimates using size-specific turnover rate corrections on size-structured data. Further use of size-structured data was of limited value. Sets of environmental parameters, particularly the water chemistry data, were better predictors of planktonic biomasses and productions than other biotic (predator/prey) data. Total Kjeldahl nitrogen was a better predictor of total plankton production estimates than total phosphorus. Lakes could not be clustered into stable community types due to the large year-to-year fluctuations in the data.

scholarly journals The Influence of Plankton Community Structure on Sinking Velocity and Remineralization Rate of Marine Aggregates

2019 ◽  
Vol 33 (8) ◽  
pp. 971-994 ◽  
Author(s):  
L. T. Bach ◽  
P. Stange ◽  
J. Taucher ◽  
E. P. Achterberg ◽  
M. Algueró‐Muñiz ◽  
...  
Keyword(s):  
Community Structure ◽  
Plankton Community ◽  
Marine Aggregates ◽  
Plankton Community Structure ◽  
Sinking Velocity

Impact of a dinoflagellate bloom on the marine plankton community structure of Port Blair Bay, Andaman Island

2020 ◽  
Vol 37 ◽  
pp. 101320
Author(s):  
Prasun Goswami ◽  
Sanjoy Gupta ◽  
Apurba Kumar Das ◽  
Nambali Valsalan Vinithkumar ◽  
Gopal Dharani ◽  
...  
Keyword(s):  
Community Structure ◽  
Plankton Community ◽  
Marine Plankton ◽  
Andaman Island ◽  
Plankton Community Structure ◽  
Dinoflagellate Bloom

Experimental Analysis of the Direct and indirect Effects of an Omnivorous Filter-Feeding Clupeid on Plankton Community Structure

1986 ◽  
Vol 43 (10) ◽  
pp. 1935-1945 ◽  
Author(s):  
Ray W. Drenner ◽  
Stephen T. Threlkeld ◽  
Michael D. McCracken
Keyword(s):  
Particle Size ◽  
Indirect Effects ◽  
Zooplankton Biomass ◽  
Plankton Community ◽  
Direct And Indirect Effects ◽  
Dorosoma Cepedianum ◽  
Feeding Rates ◽  
Filter Feeding ◽  
Menidia Beryllina ◽  
Plankton Community Structure

In laboratory trials, feeding rates of an omnivorous filter-feeding clupeid, Dorosoma cepedianum, increased as a function of particle size, with maximal rates on microspheres, spherical algae, and Zooplankton >40 μm; it did not efficiently feed on filamentous Anabaena flos-aquae. To examine the community level impacts of Dorosoma, we conducted four seasonal outdoor tank experiments of cross-classified design involving two or three densities of Dorosoma and two densities of the zooplanktivorous atherinid fish, Menidia beryllina. We attempted to discriminate between the direct and indirect effects of Dorosoma on phytoplankton by using Menidia to produce indirect effects on phytoplankton by suppressing Zooplankton. Experiments began in November, March, June, and September and lasted for 45–53 d. Dorosoma suppressed most Zooplankton in at least one experiment and enhanced algal standing crops in all four experiments, as indicated by increased algal chlorophyll fluorescence, turbidity, Coulter counts and microscopic algal counts, and decreased Secchi depths. Because in three out of four experiments Menidia suppressed Zooplankton biomass to a greater extent than Dorosoma without enhancing phytoplankton, we reject the hypothesis that the enhancement of phytoplankton by Dorosoma was an indirect effect of Zooplankton biomass suppression.

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