Experimental and mathematical model of the interactions in the mixed culture of links in the “producer–consumer” cycle

Pisman, T.I.

doi:10.1016/j.asr.2009.01.022

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…Phosphorus was considered to be the limiting factor in the producer compartment in this test, which differs from the results of a study conducted by Pisman (2009). Secondly, the nutrient uptake results revealed that phosphorus could not complete one nutrient cycle in less than 30 days.…”

Section: Discussioncontrasting

confidence: 54%

“…Different forms of carbon sources were tested in a closed ecological system, and the results revealed that organic chemicals such as cellulose support more Daphnia than inorganic carbon (Taub, 2009). Nitrogen was thought to be limiting factor in the producer compartment in the CAES (Pisman, 2009), and it was suggested P limited algae had an indirect effect on food chain dynamics (Muller-Navarra, 1995;Sterner and Elser, 2002;Becker and Boersma, 2003). Metabolites resulted from the response of nutrition limitations, such as soluble carbohydrates and enzymes, may contribute to the predator population variations (Sunda et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Closed ecological systems have been explored as model systems to investigate the ecological performance of defined species or organisms under controlled conditions (Pisman, 2009). Here we define a closed ecological system as one in which no materials such as oxygen and carbon dioxide are exchanged with the environment (Taub, 1974;Morowitz et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Possible nutrient limiting factor in long term operation of closed aquatic ecosystem

Hao

Cai

et al. 2012

Advances in Space Research

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Section: Discussioncontrasting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Possible nutrient limiting factor in long term operation of closed aquatic ecosystem

Hao

Cai

et al. 2012

Advances in Space Research

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“…Cyclopoid copepods and daphnids, which occurred in seven and three, respectively, of the study sites, but also rotifers are known to feed on small ciliates (Archbold and Berger, 1985;Arndt, 1993;Gilbert and Jack, 1993;Wickham 1995;Weisse and Frahm, 2002;Zingel et al, 2016). Algal-feeding ciliates might also be strong competitors to rotifers as ciliates can release secondary metabolites into the medium inhibiting rotifer reproduction (Pisman, 2009). However, many planktonic ciliate species perform fast jumps to escape predators and such an escape reaction is also typical for ciliates of the genera Urotricha and Halteria (Foissner et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Ciliates in man-made mountain reservoirs

Sommer

Sonntag

Rastl

et al. 2022

Front. Environ. Sci.

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Climate warming has multiple effects on an environment. Especially the Alpine region is affected by changing conditions, which do not only have ecological but also economic impacts in respect to winter sports tourism. Due to higher environmental temperatures and less precipitation, artificial snow making is becoming increasingly important and consequently, mountain reservoirs for water storage are built. In these systems, planktonic communities are not only influenced by the naturally harsh environmental conditions of the alpine region, but also by severe changes in water level fluctuations due to water withdrawal and re-filling within short time periods. Information on planktonic communities and species traits in such man-made water bodies is nonexistent. Here, we focused on ciliates, a group of unicellular protists known to adapt and respond rapidly to changing environmental conditions. Simultaneously, we identified abiotic and other biotic factors that shaped these microbial communities. We investigated the species composition, abundance and species traits of ciliates in eleven mountain reservoirs in the Tyrolean Alps, Austria, and hypothesized that these communities differed significantly from natural ones. The mountain reservoirs were investigated twice during the ice-free season and water chemistry, chlorophyll a, bacteria, zooplankton, and ciliates were sampled. We detected 48 ciliate taxa in total, with an average of five taxa per mountain reservoir. A wide range of abundance (summer: 24 to >15,600 Ind L−1; autumn: 38 to ∼7,500 Ind L−1) and no clear pattern in the community composition was found, most likely due to water level fluctuations and the source of water used for filling the mountain reservoirs. The ciliate abundance was significantly affected by pH, nutrients, but also water transparency and potential predators (crustaceans). Planktonic ciliates dominated the mountain reservoirs and, surprisingly, mixotrophic species, typically found in natural (alpine) lakes, were only rarely observed. Our data suggest that in these fast-changing systems, local factors seem to be more important than regional ones.

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Experimental analysis and novel modeling of semi-batch photobioreactors operated with Chlorella vulgaris and fed with 100% (v/v) CO2

Concas

Lutzu

Pisu

et al. 2012

Chemical Engineering Journal

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Experimental and mathematical model of the interactions in the mixed culture of links in the “producer–consumer” cycle

Cited by 4 publications

References 10 publications

Possible nutrient limiting factor in long term operation of closed aquatic ecosystem

Possible nutrient limiting factor in long term operation of closed aquatic ecosystem

Ciliates in man-made mountain reservoirs

Experimental analysis and novel modeling of semi-batch photobioreactors operated with Chlorella vulgaris and fed with 100% (v/v) CO2

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