Thermoindicator properties of phytoplankton species (by the example of waterbodies of the Southern Urals)

Snit’ko, L. V.; Rogozin, A. G.; Тимошкин, О. А.

doi:10.1134/s1995082915020121

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…The summer warming decreased its cell density because the high temperature exceeded its growth temperature range. The results presented here and the field observations of other authors also suggest that the Fragilaria genus is a eurythermal genus capable of surviving over a wide range of temperatures [ 55 , 56 , 57 ].…”

Section: Discussionsupporting

confidence: 80%

The Species-Specific Responses of Freshwater Diatoms to Elevated Temperatures Are Affected by Interspecific Interactions

et al. 2018

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Numerous experimental simulations with different warming scenarios have been conducted to predict how algae will respond to warming, but their conclusions are sometimes contradictory to each other. This might be due to a failure to consider interspecific interactions. In this study, the dominant diatom species in a seasonal succession were isolated and verified to adapt to different temperature ranges by constant temperature experiment. Both unialgal and mixed cultures were exposed to two fluctuant temperature treatments that simulated the temperature variations from early spring to summer, with one treatment 4 °C higher (warming scenario) than the other. We found that the specific response of diatoms to warming was affected by interspecific interactions. Spring warming had no significant effect on eurythermal species and had a positive effect on the abundance of warm-adapted diatom species, but interspecific interactions reduced this promotional effect. Cold-adapted species had a negative response to spring warming in the presence of other diatom species but had a positive response to early spring warming in the absence of interspecific interactions. In addition, warming resulted in the growth of all diatom species peaking earlier in unialgal cultures, but this effect could be weakened or amplified by interspecies interactions in mixed cultures. Our results suggest that the specific diatom species with different optimal growth temperature ranges responding to warming were expected if there were no interspecific interactions. However, in natural environments, the inevitable and complex interspecific interactions will influence the responses of diatoms to warming. This important factor should not be ignored in the prediction of organism responses to climate warming.

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Section: Discussionsupporting

confidence: 80%

The Species-Specific Responses of Freshwater Diatoms to Elevated Temperatures Are Affected by Interspecific Interactions

et al. 2018

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“…For example, Shear et al (1976) showed that in Rice Lake (USA), A. granulata (as Melosira granulata) only appeared in summer (~8%) while A. ambigua (as Melosira ambigua) was dominant for the rest of the year (representing ~80%). Similarly, Snitko et al (2015) inferred from a large dataset of plankton samples collected in shallow lakes in the mountain-forest zone of the southern Urals (Russia) that A. ambigua is a stenothermal cryophilous species while A. granulata is a eurythermal thermobiont. All these results indicate that A. ambigua is able to grow in lower water temperatures, compared to A. granulata-related taxa.…”

Section: Discussionmentioning

confidence: 99%

Diatom Response to Global Warming in Douhu Lake, Southeast China

Luo

Cao

et al. 2021

Acta Geologica Sinica (Eng)

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A large number of lacustrine sedimentary records indicate that global warming is the main factor leading to significant changes in diatom communities in lakes of the northern hemisphere. However, due to the intensification of human activities since 1850, some scholars have emphasized that the increasing lake trophic level may be the main reason for the changes in diatom communities. The debate is ongoing. In order to avoid falling into the complex relationship between diatom changes and the seasonal cycle that characterizes lakes in mid and high latitudes, we chose a lake located at a low latitude, where the relationship between diatoms and temperature is not indirect but direct. The diatom record spans the past ca. 100 years and reveals that the abundance of Aulacoseira granulata increased from 1900 until 1985, replacing the previously dominant Aulacoseira ambigua. These changes are in agreement with the increasing trend in global temperature. Since 1985, the percentages of the small-celled Discostella stelligera and the benthic diatom Navicula heimansioides have increased, while Aulacoseira granulata has decreased. This latest shift is caused by further global warming. We conclude that warming is the main factor leading to changing diatom communities in Douhu Lake.

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“…Change in the strength and duration of water-column mixing. The mass vegetation of Aulacoseira species in water bodies of the Southern Urals occurs in cold water in late autumn (Snitko et al, 2015). Aulacoseira species favouring strongly mixed water column were alternated by assemblages with Puncticulata radiosa preferring weakly mixing water column (Barinova et al, 2006).…”

Section: Climate Warming and Aridization (~10300-9000 Cal Bp)mentioning

confidence: 99%

Lakes ecosystem response to Holocene climate changes and human impact in the Southern Urals: Diatom and geochemical proxies

Масленникова

Udachin

2016

The Holocene

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Major changes in the Holocene were identified based on a diatom and geochemical analysis of sediment cores from Lakes Ufimskoe and Syrytkul (the Southern Urals). The Lake Ufimskoe ecosystem in the Central mountain area is identified to be highly sensitive to variations in temperature. Meanwhile, Lake Syrytkul is more responsive to climate aridization because of its limnological characteristics and less precipitation in the piedmont area. Climate events were the main drivers for lake ecosystems dynamics throughout almost the whole history of the lakes. The records of lake sediments reflect several climate events noted elsewhere in the Northern Hemisphere: Lateglacial–Holocene transition (~12,000–11,600), Preboreal oscillation (~11,200–11,000 cal. BP), climate warming and aridization (~9700–9600 cal. BP), warming and increase in precipitation since 9000 cal. BP, climate aridization at ~5800 cal. BP, cooling since 4000 cal. BP, and warming at ~2500 cal. BP. Climate warming of the last hundred years was not reflected in lake sediment records because of the significant human impact on the lake ecosystem. The upper sediments of both lakes are enriched in As, Bi, Sb, Te, Sn, Cd, Cu, Zn and Pb because of the influence of the Karabash copper smelter. However, the significant changes of the Lake Syrytkul ecosystem are not related to the technogenic impact and explained mainly by the dam construction. The changes in diatom communities identified in Lake Ufimskoe, which is located in an area geologically sensitive to acidification, are related to the acidification and heavy metal loading on the water area.

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Thermoindicator properties of phytoplankton species (by the example of waterbodies of the Southern Urals)

Cited by 7 publications

References 5 publications

The Species-Specific Responses of Freshwater Diatoms to Elevated Temperatures Are Affected by Interspecific Interactions

The Species-Specific Responses of Freshwater Diatoms to Elevated Temperatures Are Affected by Interspecific Interactions

Diatom Response to Global Warming in Douhu Lake, Southeast China

Lakes ecosystem response to Holocene climate changes and human impact in the Southern Urals: Diatom and geochemical proxies

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