Pelagic ciliated protozoa in a shallow eutrophic lake: community structure and seasonal dynamics

Zingel, Priit

doi:10.1127/archiv-hydrobiol/146/1999/495

Cited by 28 publications

(29 citation statements)

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“…These waterbodies conform to the rule established mostly from marine systems that (Sanders et al 1989(Sanders et al , 2imek et al 1995. Studies from 1995 to 1997 , Zingel 1999 (2imek et al 1990, Weisse et al 1990, Jür-gens et al 1996. For example, Urotricha spp.…”

Section: Ciliates Versus Hnf As Grazers Of Bacteria In Lake Võrtsjärvmentioning

confidence: 99%

Dominance of ciliate grazing on bacteria during spring in a shallow eutrophic lake

Kisand¹,

Zingel²

2000

Aquat. Microb. Ecol.

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Section: Ciliates Versus Hnf As Grazers Of Bacteria In Lake Võrtsjärvmentioning

confidence: 99%

Dominance of ciliate grazing on bacteria during spring in a shallow eutrophic lake

Kisand¹,

Zingel²

2000

Aquat. Microb. Ecol.

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“…Scuticociliates and oligo trichs can compete with each other (e.g. Zingel 2005), which also emphasizes their vertical niche separation.As is typical of ciliate communities (Amblard et al 1995, Zingel 1999, Peštová et al 2008, the abundance of species in Lake Valkea-Kotinen varied with time and depth. However, regarding anoxia the results were somewhat surprising and most of the taxa observed were present in both oxic and anoxic waters, and only 5 taxa were found solely in the oxic and 2 in the anoxic layers.…”

mentioning

confidence: 77%

“…groups commonly found in lakes of various trophic states and over wide geographical areas (Hadas & Berman 1998, Zingel 1999, Peštová et al 2008, and references therein). The mean ciliate abundance was slightly higher than in Lake Vesijärvi (Brę k-Laitinen et al 2012) and twice as high as in Lake Vassiviere (Amblard et al 1995).…”

Section: Discussionmentioning

confidence: 99%

Weak response of the microbial food web of a boreal humic lake to hypolimnetic anoxia

Peltomaa

Zingel

Ojala

2013

Aquat. Microb. Ecol.

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As a consequence of climate change, thermal stratification in lakes strengthens and increases the tendency towards hypolimnetic hypoxia or even anoxia. In the boreal zone, numerous lakes already undergo seasonal hypolimnetic anoxia, but its consequences for the microbial food web (MFW) are still largely unknown. However, the abundance as well as vertical distribution of predators, especially ciliates, in the MFW is generally assumed to be controlled by food and oxygen availability. To determine whether oxygen regulates the MFW, we studied the autotrophic picoplankton (APP), larger phytoplankton, bacteria, nanoflagellates (NFs) and ciliates present throughout the growing season in a small, humic and seasonally strongly stratified lake (ValkeaKotinen) with an anoxic hypolimnion. The prey numbers in Lake Valkea-Kotinen were low, whereas the predators were numerous. The abundance of NFs, which was coupled with that of bacteria, was especially high. However, our results indicated no clear response to oxygen conditions, although the abundances of the predators were generally higher in the oxic than in the anoxic water layers. The only ciliate feeding group that showed a clear response was the omnivores, which thrived in the hypoxic hypolimnion in early summer. The APP and bacterial abundances were in general high in the upper hypolimnion near the thermocline, which in Lake Valkea-Kotinen is prone to convective mixing. This diurnal disturbance nurtures the autotrophic and heterotrophic community around the thermocline and may also explain the rather high predator abundance in the MFW of Lake Valkea-Kotinen.KEY WORDS: Autotrophic picoplankton · Bacteria · Heterotrophic nanoflagellates · Ciliates · Thermocline · Convection Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 68: 91-105, 2013 92 place macrozooplankton as the main grazers (Masson & Pinel-Alloul 1998).In the boreal zone, numerous lakes regularly undergo seasonal hypolimnetic hypoxia and finally anoxia. The special characteristic of these usually small lakes is the high concentration of coloured organic matter (OM) deriving from the catchment, and thus MFW studies in these types of lakes typically focus on bacterial utilization of allochthonous carbon and ignore comprehensive description of the trophic structure of MFWs. Usually boreal lakes are dimictic, but as small and sheltered bodies of water they often undergo incomplete spring turnover and thus their hypolimnia remain anoxic after winter (Huotari et al. 2009). Due to rapid light attenuation, phytoplankton production in humic lakes is restricted to the upper few metres (Arvola 1984, Karlsson et al. 2009, Peltomaa & Ojala 2010. This results in depletion of epilimnetic inorganic nutrients -most often phosphorus -during summer. However, the nutrients are often abundant in the hypolimnia (Arvola 1984). Phytoplankton communities in humic lakes are dominated by flagellated species capable of migrating vertically between the epilimnion and the hypolimni...

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“…Dominance by oligotrich and protostomatid ciliates is observed in the pelagic of freshwater lakes worldwide (Galbraith and Burns 2010;Mathes and Arndt 1995;Mayer et al 1997;Salbrechter and Arndt 1994;Zingel 1999) and classified by Foissner et al (1991) as Oligotrichetea. Some authors have stated that dominance by oligotrichs is mainly characteristic for oligo-mesotrophic lakes with a low organic matter concentration (Beaver and Crisman 1982;Beaver et al 1988;Carrias et al 1998;Zingel et al 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Ciliate abundance generally increases with lake trophy (Beaver and Crisman 1982;Galbraith and Burns 2010;Hwang and Heath 1997;Mathes and Arndt 1994;Pfister et al 2002) as does their importance relative to zooplankton (Auer et al 2004;Mathes and Arndt 1994). In shallow eutrophic waters they often dominate the protozoan biomass and can exert a grazing pressure on the phyto-and bacterioplankton comparable to that of metazooplankton Arndt 1994, 1995;Zingel 1999). The relative importance of small (<35 m), mainly bacterivorous, ciliates tends to increase with increasing trophy (Beaver and Crisman 1982;Jürgens et al 1999;Nakano et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Planktonic ciliate community structure in shallow lakes of lowland Western Europe

Wichelen

Johansson

Vanormelingen

et al. 2013

European Journal of Protistology

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. AbstractTemperate shallow meso-to eutrophic lakes can exist in one of two alternative states with contrasting foodwebs, referred to as the clear-water and the turbid state. We describe the planktonic ciliate communities of such lakes based on a survey of 66 northwestern European lakes. Ciliates were enumerated and identified to species level according to the quantitative protargol staining technique. Ciliate biomass was on average twice as high in the turbid than in the clear-water lakes. The ciliate communities were dominated by oligotrichs and protostomatids, and no differences in functional composition or ␣-diversity could be detected between turbid and clear-water lakes, although ␤-diversity tended to be higher in the latter. At the species level, however, community structure strongly differed between turbid and clear-water lakes, and several indicator species could be identified for the different lake categories. Variation partitioning showed that nutrient status did not explain ciliate community structure independent of the alternative states, while lake area was identified as an additional structuring factor for the ciliate communities. These results stress the importance of the ecosystem structure in shaping ciliate communities in temperate shallow lakes and suggest that nutrient status has little direct effect on ciliate community structure in such lakes.

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Pelagic ciliated protozoa in a shallow eutrophic lake: community structure and seasonal dynamics

Cited by 28 publications

References 0 publications

Dominance of ciliate grazing on bacteria during spring in a shallow eutrophic lake

Dominance of ciliate grazing on bacteria during spring in a shallow eutrophic lake

Weak response of the microbial food web of a boreal humic lake to hypolimnetic anoxia

Planktonic ciliate community structure in shallow lakes of lowland Western Europe

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