Characteristics of Growth and Fluorescence of Certain Types of Algae during Acclimation to Different Temperatures under Culture Conditions

Акимов, А. М.; Соломонова, Е. С.

doi:10.1134/s0001437019030019

Cited by 13 publications

(7 citation statements)

References 26 publications

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“…While for dinoflagellates, this parameter is 4-6 °C higher. Although some diatoms species isolated from Black Sea plankton, such as Thalassiosira weissflogii (Grunow) G. Fryxell & Hasle and Cylindrotheca closterium (Ehrenberg) Reimann & J. C. Lewin, which in their temperature resistance do not differ from dinoflagellates (Akimov & Solomonova 2019). Perhaps, due to this reason, during the summer periods 2010-2014, within the studied Bay, previously dominating diatoms, such as representatives of the Chaetoceros genus, were represented in low quantity.…”

Section: Discussionmentioning

confidence: 95%

“…This was due to the low nitrates and silicon concentrations in water after 2006, as well as a decrease in the relative diatom contribution in the total phytoplankton biomass in favor of dinoflagellates and coccolithophorides. One of the features of dinoflagellates is that they have significantly lower (2-3 times) in comparison to diatoms specific chlorophyll a concentrations in cells and low values of specific growth rate (Mansurova 2013) as well as relatively low efficiency of photosystem 2 (Akimov & Solomonova 2019). Therefore, with other conditions equal, they provide a lower increase in the chlorophyll concentration and phytoplankton biomass.…”

Section: Discussionmentioning

confidence: 99%

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Phytoplankton adaptation strategies under the influence of climatic changes and anthropogenic pressure on the Black Sea coastal ecosystems on the example Sevastopol Bay

2020

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Some ways of the Black Sea coastal waters phytoplankton community adaptation to changes in water temperature, nutrients concentration and anthropogenic pollution have been identified on the example of the Sevastopol Bay. The increase in water temperature and decrease in nutrient content in the studied waters during 2000 – 2014 caused a gradual decrease in the chlorophyll a concentrations, total phytoplankton biomass and its re-composition, predominantly in the summer and autumn periods. The phytoplankton restructuring was predominantly reflected by a decrease in relative diatoms contribution in the total phytoplankton biomass and an increase in dinoflagellates contribution. Among the dominant diatoms species, the share of resistant species to high temperatures, pollution, low nitrate content in the water and microzooplankton grazing was increasing. An increase in nitrate concentration in the studied waters in 2020 led to increase in total phytoplankton biomass and a predominance of diatoms species, which under the stated conditions did not lead to bloom emergence as were regularly observed earlier in the Sevastopol region.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Phytoplankton adaptation strategies under the influence of climatic changes and anthropogenic pressure on the Black Sea coastal ecosystems on the example Sevastopol Bay

2020

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“…and C. curvisetus. For dinoflagellates, this parameter is 4-6 • C higher [22]. However, some diatom species isolated from the Black Sea plankton (e.g., Thalassiosira weissflogii (Grunow) G.Fryxell & Hasle and Cylindrotheca closterium (Ehrenberg) Reimann & J.C. Lewin do not differ from dinoflagellates by their temperature resistance [22].…”

Section: Discussionmentioning

confidence: 99%

“…For dinoflagellates, this parameter is 4-6 • C higher [22]. However, some diatom species isolated from the Black Sea plankton (e.g., Thalassiosira weissflogii (Grunow) G.Fryxell & Hasle and Cylindrotheca closterium (Ehrenberg) Reimann & J.C. Lewin do not differ from dinoflagellates by their temperature resistance [22]. It is perhaps due to this reason that the previously dominating diatoms, for example, representatives of the genus Chaetoceros, were found in small amounts in the researched bays during the summer period.…”

Section: Discussionmentioning

confidence: 99%

Phytoplankton Growth Rate and Microzooplankton Grazing under Conditions of Climatic Changes and Anthropogenic Pollution in the Coastal Waters of the Black Sea (Sevastopol Region)

Stelmakh

Ковригина

2021

Water

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In the coastal waters of the Black Sea near Sevastopol, a gradual temperature elevation and an increase in anthropogenic pressure since the early 2000s have caused significant structural and functional changes in phytoplankton. Currently, there is a significant decrease in the contribution of small diatom species (Skeletonema sp. and Chaetoceros socialis H.S.Lauder as well as coccolithophorids Emiliania huxleyi (Lohmann) W.W.Hay and H.P.Mohler) to the total phytoplankton biomass in these waters. Previously these species caused regular weak blooms. In the warm periods (from May to October), during which the main phytoplankton biomass is formed, large diatom species Pseudosolenia calcar-avis (Schultze) B.G.Sundström, 1986, Proboscia alata (Brightwell) Sundström and dinoflagellates predominate. Therefore, the maximum values of the phytoplankton community’s specific growth rate are about two times lower than in the preceding periods and do not exceed 1.10–1.40 day−1. There was also a decrease observed in the microzooplankton grazing rate, which, during the year, was no higher than 0.70–1.20 day−1. This is primarily conditioned by the increased role of large algae in phytoplankton, which means a decline in nutrition quality for microzooplankton. As a result of the joint influence of nutrition quality and water pollution, the relative share of net primary production consumed by microzooplankton in the warm periods of the year averaged only 32%, which is two times lower than the average values generally accepted for marine ecosystems. This means that the transfer of matter and energy from phytoplankton to higher trophic levels is significantly decreased.

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“…Therefore, even at the worst temperature scenario, algae density may be not properly limited. Temperatures that exceed the thermal tolerance limits negatively affect microflora through degradation and lysis of their cells (Akimov & Solomonova, 2019 ). It has been previously found that bromeliad amoeba, algae, ciliates, and microfauna predators all had a unimodal relationship with environmental temperature (Kratina et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Effects of warming on the structure of aquatic communities in tropical bromeliad microecosystems

Progênio

Antiqueira

Oliveira

et al. 2023

Ecology and Evolution

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Characteristics of Growth and Fluorescence of Certain Types of Algae during Acclimation to Different Temperatures under Culture Conditions

Cited by 13 publications

References 26 publications

Phytoplankton adaptation strategies under the influence of climatic changes and anthropogenic pressure on the Black Sea coastal ecosystems on the example Sevastopol Bay

Phytoplankton adaptation strategies under the influence of climatic changes and anthropogenic pressure on the Black Sea coastal ecosystems on the example Sevastopol Bay

Phytoplankton Growth Rate and Microzooplankton Grazing under Conditions of Climatic Changes and Anthropogenic Pollution in the Coastal Waters of the Black Sea (Sevastopol Region)

Effects of warming on the structure of aquatic communities in tropical bromeliad microecosystems

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