Phytoplankton community dynamics in West Lake after drawing water from the Qiantang River

AbstractPhytoplankton is confronted with a variable assemblage of zooplankton grazers that create a strong selection pressure for traits that reduce mortality. Phytoplankton is, however, also challenged to remain suspended and to acquire sufficient resources for growth. Consequently, phytoplanktic organisms have evolved a variety of strategies to survive in a variable environment. An overview is presented of the various phytoplankton defense strategies, and costs and benefits of phytoplankton defenses with a zooming in on grazer-induced colony formation. The trade-off between phytoplankton competitive abilities and defenses against grazing favor adaptive trait changes—rapid evolution and phenotypic plasticity—that have the potential to influence population and community dynamics, as exemplified by controlled chemostat experiments. An interspecific defense–growth trade-off could explain seasonal shifts in the species composition of an in situ phytoplankton community yielding defense and growth rate as key traits of the phytoplankton. The importance of grazing and protection against grazing in shaping the phytoplankton community structure should not be underestimated. The trade-offs between nutrient acquisition, remaining suspended, and grazing resistance generate the dynamic phytoplankton community composition.

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Storm impacts on phytoplankton community dynamics in lakes

Global Change Biology ◽

10.1111/gcb.15033 ◽

2020 ◽

Vol 26 (5) ◽

pp. 2756-2784 ◽

Cited By ~ 12

Author(s):

Jason D. Stockwell ◽

Jonathan P. Doubek ◽

Rita Adrian ◽

Orlane Anneville ◽

Cayelan C. Carey ◽

...

Keyword(s):

Community Dynamics ◽

Phytoplankton Community

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Phytoplankton community dynamics

The Trophic Cascade in Lakes ◽

10.1017/cbo9780511525513.012 ◽

1993 ◽

pp. 189-209 ◽

Cited By ~ 5

Author(s):

S. R. Carpenter ◽

J. A. Morrice ◽

J. J. Elser ◽

A. L. ST. Amand ◽

N. A. MacKay

Keyword(s):

Community Dynamics ◽

Phytoplankton Community

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Interactions of Ipomoea aquatica and Utricularia reflexa with phytoplankton densities in a small water body in northern Nigeria

Oceanological and Hydrobiological Studies ◽

10.2478/s13545-012-0015-1 ◽

2012 ◽

Vol 41 (2) ◽

Cited By ~ 3

Author(s):

Mathias Chia ◽

Michael Adelanwa ◽

Zakari Ladan ◽

Dora Iortsuun ◽

Sewuese Adanyi ◽

...

Keyword(s):

Water Body ◽

Community Dynamics ◽

Phytoplankton Community ◽

The Other ◽

Phytochemical Screening ◽

Negative Effects ◽

Ipomoea Aquatica ◽

Small Water ◽

Small Water Body ◽

Ft Ir

AbstractThe interactions of Ipomoea aquatica and Utricularia reflexa with phytoplankton densities were studied in a small water body in Zaria, Nigeria from June to November 2007. The negative effects of both macrophytes on 10 out of 15 phytoplankton taxa, including Staurastrum sp., Netrium sp., Ulothrix sp., Marssionella sp. and Closterium sp. were differentiated from other environmental effects. U. reflexa, on the other hand, showed positive associations with species like Actinocyclus sp., Palmellopsis sp., Spirotaenia sp., Microcystis sp. and Marssionella sp. Qualitative phytochemical screening and FT-IR analyses confirmed the presence of glycosides, anthraquinone, saponins, steroids, triterpenes, flavonoids, and alkaloids in Ipomoea aquatica and Utricularia reflexa. The observed variations in phytoplankton community dynamics were closely related to the presence of these macrophytes as well as the environmental conditions in the pond.

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