Effects of zebra mussels (Dreissena polymorpha) on phytoplankton under eutrophic conditions

2021 ◽  
pp. 63-68
Author(s):  
Ekaterina G. Sakharova ◽  
Irina Yu. Feniova ◽  
Zoya I. Gorelysheva ◽  
Maciej Karpowicz ◽  
Andrzej Górniak
Keyword(s):  
Dreissena Polymorpha ◽  
Phytoplankton Community ◽  
Food Resource ◽  
Zebra Mussels ◽  
Filamentous Algae ◽  
Total Abundance ◽  
Nitrogen And Phosphorus ◽  
N:P Ratios ◽  
Phytoplankton Structure ◽  
Mesocosm Experiments

We conducted two mesocosm experiments (2014 and 2017) to determine how invasive zebra mussels affected abundance and structure of phytoplankton community. Algae reaction was different for the introduction of D. polymorpha in 2014 and 2017. There was no influence of zebra mussels on the phytoplankton total abundance; however, it changed the biomass of individual taxa. Cyanoprokaryota reaction as a result the zebra mussels introduction was influenced by the initial phytoplankton structure and initial nitrogen and phosphorus concentrations in water. The biomass of Сyanoprokaryotа decreased at low N:P ratios and increased at high N:P ratios. Dreissena increased the biomass of large green filamentous algae, which is a poor food resource for zooplankton.

scholarly journals The Influence of Ocean Acidification and Warming on DMSP & DMS in New Zealand Coastal Water

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 181
Author(s):  
Alexia D. Saint-Macary ◽  
Neill Barr ◽  
Evelyn Armstrong ◽  
Karl Safi ◽  
Andrew Marriner ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Coastal Water ◽  
Phytoplankton Community ◽  
Dimethyl Sulfide ◽  
Temperature Treatment ◽  
Low Ph ◽  
Trace Gas ◽  
Mesocosm Experiments ◽  
Future Warming ◽  
Higher Temperature

The cycling of the trace gas dimethyl sulfide (DMS) and its precursor dimethylsulfoniopropionate (DMSP) may be affected by future ocean acidification and warming. DMSP and DMS concentrations were monitored over 20-days in four mesocosm experiments in which the temperature and pH of coastal water were manipulated to projected values for the year 2100 and 2150. This had no effect on DMSP in the two-initial nutrient-depleted experiments; however, in the two nutrient-amended experiments, warmer temperature combined with lower pH had a more significant effect on DMSP & DMS concentrations than lower pH alone. Overall, this indicates that future warming may have greater influence on DMS production than ocean acidification. The observed reduction in DMSP at warmer temperatures was associated with changes in phytoplankton community and in particular with small flagellate biomass. A small decrease in DMS concentration was measured in the treatments relative to other studies, from −2% in the nutrient-amended low pH treatment to −16% in the year 2150 pH and temperature conditions. Temporal variation was also observed with DMS concentration increasing earlier in the higher temperature treatment. Nutrient availability and community composition should be considered in models of future DMS.

Cross-habitat differences in crush resistance and growth pattern of zebra mussels (Dreissena polymorpha): effects of calcium availability and predator pressure

2006 ◽  
Vol 165 (2) ◽  
pp. 191-208 ◽  
Author(s):  
Marcin Czarnołęski ◽  
Jan Kozłowski ◽  
Przemysław Kubajak ◽  
Krzysztof Lewandowski ◽  
Tomasz Müller ◽  
...  
Keyword(s):  
Growth Pattern ◽  
Dreissena Polymorpha ◽  
Zebra Mussels ◽  
Predator Pressure ◽  
Habitat Differences ◽  
Calcium Availability

Projected Changes to the Trophodynamics of PCBs in the Western Lake Erie Ecosystem Attributed to the Presence of Zebra Mussels (Dreissena polymorpha)

1998 ◽  
Vol 32 (24) ◽  
pp. 3862-3867 ◽  
Author(s):  
Heather A. Morrison ◽  
Frank A. P. C. Gobas ◽  
Rodica Lazar ◽  
D. Michael Whittle ◽  
G. Douglas Haffner
Keyword(s):  
Dreissena Polymorpha ◽  
Lake Erie ◽  
Zebra Mussels ◽  
Western Lake ◽  
Projected Changes ◽  
Western Lake Erie

Factors influencing the growth of Mougeotia in experimentally acidified mesocosms

2000 ◽  
Vol 57 (3) ◽  
pp. 538-547 ◽  
Author(s):  
Jennifer L Klug ◽  
Janet M Fischer
Keyword(s):  
Inorganic Carbon ◽  
Phytoplankton Community ◽  
Dissolved Inorganic Carbon ◽  
Abiotic Factors ◽  
Minor Role ◽  
Little Rock ◽  
Factors Associated ◽  
Phytoplankton Communities ◽  
Mesocosm Experiments ◽  
Potential Factors

Acidification causes profound changes in species composition in aquatic systems. We conducted mesocosm experiments in three northern Wisconsin lakes (Trout Lake, Little Rock - Reference, Little Rock - Treatment) to test how different phytoplankton communities respond to acidification. Major differences exist among these lakes in water chemistry and phytoplankton community composition. In each lake, three pH treatments (control, press (sustained pH 4.7), and pulse (alternating pH 4.7 and ambient pH)) were maintained for 6 weeks. We observed a striking increase in species in the genus Mougeotia in all systems. Mougeotia is a filamentous green alga often found in acidified lakes. The magnitude of the Mougeotia increase differed among lakes and treatments, and we used an autoregressive model to identify potential factors responsible for these differences. Our results suggest that biotic factors such as competition with other algae played a relatively minor role in regulating Mougeotia dynamics. Instead, pH and abiotic factors associated with changes in pH (e.g., dissolved inorganic carbon) were important predictors of Mougeotia dynamics.

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