Abundance and Structure of Microbial Loop Components (Bacteria and Protists) in Lakes of Different Trophic Status

Ryszard, Chrost J; Adamczewski, Tomasz; Kalinowska, Krystyna; Skowrońska, Agnieszka

doi:10.4014/jmb.0812.651

Cited by 32 publications

(36 citation statements)

References 48 publications

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“…In the mesotrophic lake, significant correlations were determined between the abundance of components of the microbial loop and temperature, TOC, and P tot . Studies on the development and growth of bacteria reveal that they are determined by, among others, the temperature of the environment and its pH (Chróst et al, 2009). These factors, and the content of phosphorus and chlorophyll a in water, also strongly affect the occurrence of protists in limnic ecosystems (Mieczan, 2008).…”

Section: Microbial Loop Components Vs Physical and Chemical Parametersmentioning

confidence: 99%

“…The number of individual elements in the pelagic zone is also reduced by controlling "top down" or "bottom up" processes in the trophic pyramid (Chróst et al, 2009). Hardly any information is available on the functioning of the microbial loop in the psammolittoral zone in lakes of different trophic status.…”

Section: Introductionmentioning

confidence: 99%

“…Heterotrophic bacteria play an essential role in processes of decomposition and utilization of organic matter within the microbial loop. They also show the ability to transform the dissolved organic matter into particular organic matter and then to protistan grazing transfer (Koton-Czarnecka and Chróst, 2003;Chróst et al, 2009). In this way, bacteria transmit carbon to higher trophic levels in aquatic ecosystems (Chróst et al, 2009;Gudasz et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…They also show the ability to transform the dissolved organic matter into particular organic matter and then to protistan grazing transfer (Koton-Czarnecka and Chróst, 2003;Chróst et al, 2009). In this way, bacteria transmit carbon to higher trophic levels in aquatic ecosystems (Chróst et al, 2009;Gudasz et al, 2012). Heterotrophic nanoflagellates are major consumers of bacteria and picoplanktonic algae in different freshwater habitats (Kalinowska, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Ciliates versus other components of the microbial loop in the psammolittoral zone: horizontal distribution

Nawrot¹,

Mieczan²

2014

Turk J Zool

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The objective of this study was to determine the abundance and biomass of microbial loop components in 2 lakes of different trophic status. The lakes (mesotrophic and eutrophic ones) were located in the Łęczna-Włodawa Lakeland. The effect of selected physical and chemical water parameters on this group of organisms was also analyzed. Psammon samples were collected during 3 seasons: spring, summer, and autumn 2011. In each of the lakes, samples were collected in the euarenal, higroarenal, and hydroarenal zones. The highest abundance and biomass of the microbial loop components were recorded in spring in the eutrophic lake. The mesotrophic lake showed an increase in flagellates in autumn with a decline in the abundance of ciliates. In the mesotrophic lake, the density of individual elements of the microbial loop was correlated with temperature and total organic carbon, and in the eutrophic lake with pH, chlorophyll a, and ammonium nitrogen. In both lakes, a significant correlation occurred between bacteria and ciliate abundances. In both trophic types of lakes, the highest correlations between bacteria and heterotrophic protists were noted in hydroarenal zone. In the euarenal and higroarenal zones, the correlations were weaker.

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Section: Microbial Loop Components Vs Physical and Chemical Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ciliates versus other components of the microbial loop in the psammolittoral zone: horizontal distribution

Nawrot¹,

Mieczan²

2014

Turk J Zool

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“…Moreover, the ciliate importance to the food web increases with higher primary productivity (Sherr and Sherr, 2002), although it remains to be shown if this relationship holds true for tropical lakes, such as Catemaco. The nature of lacustrine trophic microbial web components and their interactions have been studied for temperate lakes with different trophic statuses (Straškrabová et al, 1999;Pfister et al, 2002;Auer et al, 2004;Chróst et al, 2009;Agasild et al, 2013;Van Wichelen et al, 2013), including eutrophic temperate lakes affected by cyanobacterial blooms (Moustaka-Gouni et al, 2006;Zingel et al, 2007;Zingel and Nõges, 2010), shallow soda lakes of Africa (Burian et al, 2013), relatively shallow eutrophic lakes, deep oligotrophic tropical lakes of Eastern Africa (Yasindi and Taylor, 2003), deep athalassohaline lakes of North America Peštová et al, 2008), and shallow subtropical lakes with differing trophic statuses (Beaver and Crisman, 1989;Beaver and Crisman, 1990;Gomes and Godinho, 2003;MachadoVelho et al, 2005;Havens et al, 2007;Bagatini et al, 2013;Machado-Velho et al, 2013). These studies have demonstrated that microbial food webs, particularly the composition, abundance, biomass and diversity of ciliates, present specific responses to the geographic, climatic and ecological features of different lakes and reservoirs.…”

Section: Introductionmentioning

confidence: 99%

The trophic role and impact of plankton ciliates in the microbial web structure of a tropical polymictic lake dominated by filamentous cyanobacteria

Esquivel¹,

Barani²,

Macek³

et al. 2016

J Limnol

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The recent interest in the plankton structures and dynamics in tropical and subtropical lakes has revealed important trends that set these lakes apart from temperate lakes, and one of the main differences is ); however, significant differences were observed between seasons for both variables. Nano-sized filamentous cyanobacteria were the most abundant component of the plankton, and their abundance was assessed through epifluorescence microscopy counts. The autotrophic and heterotrophic picoplankton abundance was measured through epifluorescence, and their abundance and biomass were higher at the study site relative to other shallow freshwater ecosystems. The total ciliate biomass distribution patterns were similar to those of filamentous cyanobacteria and autotrophic or heterotrophic picoplankton, although the nanociliate biomasses peaked when the picoplankton and filamentous cyanobacteria were least abundant. The consequences of this increased importance of ciliates on the structure of the plankton at Lake Catemaco will be discussed along with the probable causes.

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The effect of climate warming on microbial loop function in peat pools and Sphagnum hollows: Mesocosm experiments

Mieczan

Tarkowska‐Kukuryk

2020

Int Rev Hydrobiol

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Climate change models predict a possible increase in air temperature of 2-8°C. This means that global warming will significantly affect the functioning of various types of hydrogenic ecosystems. However, the effect of the temperature increase on microbial loop function in small water bodies associated with peat ecosystems (peat pools and Sphagnum hollows) is still unknown. We used mesocosm experiments (control and treatments with a 2°C, 4°C and 8°C temperature increase) to determine the response of bacterioplankton, flagellates, testate amoebae and ciliates to simulated temperature changes, taking into account seasonal variation in the temperate climate zone. The simulated increase in climate warming increased the species richness of ciliates and the abundance of bacteria, flagellates and ciliates. In contrast, there was a decrease in the species number and abundance of testate amoebae, the top predators in peat ecosystems. The sensitivity of the various microbial groups to temperature was size-dependent; large-sized testate amoebae declined under warming. These shifts caused a decrease in the predator-prey mass ratio. An increase in the abundance of top predators promotes increased abundance of ciliates, and thus changes the architecture of the food web. At the same time, we observed the increase in phycoflora biomass thus can cancel the potential negative effects of warming on heterotrophic microbial activity. So, the potential effect of warming on the C budgets of peat pools and hollows is evident. A better understanding of what regulates microbial populations and activity in small reservoirs in peat bogs and unravelling of these fundamental mechanisms are particularly critical to more accurately predict how peat bogs will respond to climate disturbances.climate changes, food web, shallow reservoirs, temperature | INTRODUCTIONClimate change models indicate that air temperature may increase by 2-8°C (IPC, 2013), and this increase has been particularly evident in the last few years. Global warming increases the frequency of extreme weather phenomena, including very hot periods in the summer or a complete lack of ice cover on water bodies during the winter (Cao et al., 2015). The gradual increase in temperature also influences thermal stratification of lakes and the development of primary producers, and in the future may intensify eutrophication (Audet et al., 2017;Moss, 2012). Shallow lake ecosystems are particularly vulnerable to these changes (Jeppesen et al., 2015). Research on microbial communities in shallow lake ecosystems has shown that a rise in temperature causes an increase in bacterial production (Özen et al., 2013;Zingel et al., 2018). The growth rate of protozoa (increase in size and reproduction rate) is also controlled by

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Abundance and Structure of Microbial Loop Components (Bacteria and Protists) in Lakes of Different Trophic Status

Cited by 32 publications

References 48 publications

Ciliates versus other components of the microbial loop in the psammolittoral zone: horizontal distribution

Ciliates versus other components of the microbial loop in the psammolittoral zone: horizontal distribution

The trophic role and impact of plankton ciliates in the microbial web structure of a tropical polymictic lake dominated by filamentous cyanobacteria

The effect of climate warming on microbial loop function in peat pools and Sphagnum hollows: Mesocosm experiments

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