High Heterotrophic Bacterial Production in Acidic, Iron-Rich Mining Lakes

Kamjunke, Norbert; Tittel, Jörg; Krumbeck, Hartwig; Beulker, Camilla; Poerschmann, Juergen

doi:10.1007/s00248-004-0270-9

Cited by 48 publications

(30 citation statements)

References 37 publications

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“…The hydrochemical composition is remarkably similar in the study lakes; pH ranges from 2.3-2.8. Physico-chemical and biological features of these AML have been reported by Nixdorf et al (2003), Kamjunke et al (2005), Gaedke and Kamjunke (2006), Weithoff et al (2010), and Moser and Weisse (2011b). The AML at Langau (LG in the following) and the AML111 in Lusatia (ML111 in the following) are older than the adjacent AML130 (ML130 in the following); the latter is also the largest of the three study lakes (Table 1).…”

Section: Methodssupporting

confidence: 52%

Significant habitat effects influence protist fitness: evidence for local adaptation from acidic mining lakes

Weisse¹,

Berendonk²,

Kamjunke³

et al. 2011

Ecosphere

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Abstract. It is currently controversially discussed if the same freshwater microorganisms occur worldwide wherever their required habitats are realized, i.e., without any adaptation to local conditions below the species level. We performed laboratory experiments with flagellates and ciliates from three acidic mining lakes (AML, pH ;2.7) to investigate if similar habitats may affect similar organisms differently. Such manmade lakes provide suitable ecosystem models to test for the significance of strong habitat selection. To this end, we analyzed the growth response of three protist taxa (three strains of the phytoflagellate Chlamydomonas acidophila, two isolates of the phytoflagellate Ochromonas and two species of the ciliate genus Oxytricha) by exposing them to lake water of their origin and from the two other AML in a crossfactorial design. Population growth rates were measured as a proxy for their fitness. Results revealed significant effects of strain, lake (¼habitat), and strain 3 habitat interaction. In the environmentally most adverse AML, all three protist taxa were locally adapted. In conclusion, our study demonstrates that (1) the same habitat may affect strains of the same species differently and that (2) similar habitats may harbor ecophysiologically different strains or species. These results contradict the 'everything is everywhere' paradigm.

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Section: Methodssupporting

confidence: 52%

Significant habitat effects influence protist fitness: evidence for local adaptation from acidic mining lakes

Weisse¹,

Berendonk²,

Kamjunke³

et al. 2011

Ecosphere

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“…During the last few decades, numerous studies have permitted to describe the biogeochemical functioning of these acid mining pit lakes and to currently consider bioremediation strategies (e.g. Peine et al, 2000;Knöller et al, 2004;Meier et al, 2004;Kamjunke et al, 2005;Blodau, 2006;Koschorreck et al, 2007;Geller et al, 2009). The acidity of lake water is a result of the weathering of pyriteand marcasite-enriched surrounding dumps through the production of SO different factors controlling microbial oxidizing and reductive processes within top sediments are thus crucial for the dynamics of acidity generation and consumption, and as a consequence, for the long-term development of acidic mining lakes and their watersheds (Blodau, 2006).…”

Section: Introductionmentioning

confidence: 99%

Influence of bioturbation on the biogeochemistry of littoral sediments of an acidic post-mining pit lake

2011

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Abstract. In the last decades, the mining exploitation of large areas in Lusatia (Eastern Germany) but also in other mining areas worldwide has led to the formation of hundreds of pit lakes. Pyrite oxidation in the surrounding dumps makes many such lakes extremely acidic (pH < 3). The biogeochemical functioning of these lakes is mainly governed by cycling of iron. This represents a relevant ecological problem and intensive research has been conducted to understand the involved biogeochemical processes and develop bioremediation strategies. Despite some studies reporting the presence of living organisms (mostly bacteria, algae, and macroinvertebrates) under such acidic conditions, and their trophic interactions, their potential impact on the ecosystem functioning was poorly investigated. The present study aimed to assess the influence of chironomid larvae on oxygen dynamics and iron cycle in the sediment of acidic pit lakes. In the Mining Lake 111, used as a study case since 1996, Chironomus crassimanus (Insecta, Diptera) is the dominant benthic macro-invertebrate species and occurs at relatively high abundances in shallow water. A 16-day laboratory experiment using microcosms combined with high resolution measurements (DET gel probes and O 2 microsensors) was carried out. The burrowing activity of C. crassimanus larvae induced a 3-fold increase of the diffusive oxygen uptake by sediment, indicating a stimulation of the mineralization of organic matter in the upper layers of the sediment. The iron cycle was also impacted (e.g. lower rates of reduction and oxidation, increase of iron-oxidizing bacteria abundance, stimulation of mineral formation) but with no significant effect on the iron flux at the sediment-water interface, and thus Correspondence to: S. Lagauzère (lagauzere@gmail.com) on the water acidity budget. This work provides the first assessment of bioturbation in an acidic mining lake and shows that its influence on biogeochemistry cannot be neglected.

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“…The formation of low‐molecular‐weight organic acids by photolysis of recalcitrant DOC (Brinkmann et al. 2003, Kamjunke et al. 2005) stimulates the activity of bacteria and algae (Wetzel et al.…”

mentioning

confidence: 99%

“…Cd. acidophila and planktonic bacteria from an acidic environment were isolated from mining lake 111 (Germany; pH 2.6; see Kamjunke et al. 2005).…”

mentioning

confidence: 99%

ALGAE AS COMPETITORS FOR GLUCOSE WITH HETEROTROPHIC BACTERIA¹

Kamjunke

Köhler

Wannicke

et al. 2008

Journal of Phycology

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Dissolved organic carbon (DOC) constitutes the bulk of organic carbon in aquatic environments. The importance of DOC utilization by mixotrophic algae is unclear since heterotrophic bacteria are regarded as more efficient users. We tested the hypothesis that algae decrease the DOC concentration in the light to lower levels than in darkness resulting in competitive exclusion of heterotrophic bacteria according to the mechanistic competition theory. We investigated (a) the uptake kinetics of glucose as a model substrate by two cultured algae and mixed bacteria populations, (b) the competition for glucose between algae and bacteria in chemostats, (c) the effect of discontinuous glucose supply in chemostats, and (d) the minimum glucose concentrations achieved in cultures of algae and bacteria. Bacteria showed higher specific-glucose-uptake rates than algae. In chemostats, algae became extinct in the dark and coexisted in the light where they decreased bacteria to lower densities. Discontinuous glucose supply promoted the algae compared to continuous substrate addition. Several algae consumed glucose to lower concentrations in the dark than in the light and showed lower or equal residual glucose concentrations than bacteria. Residual concentrations were not related to allometric traits (cell volume) and photosynthetic potential (chl content). Overall, the hypothesis was not supported, and mechanisms of competition for DOC obviously differed from those for particulate prey. However, since some algae showed lower or equal residual glucose concentrations than bacteria, algal dark uptake of DOC may be important in deep layers of many waters.

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High Heterotrophic Bacterial Production in Acidic, Iron-Rich Mining Lakes

Cited by 48 publications

References 37 publications

Significant habitat effects influence protist fitness: evidence for local adaptation from acidic mining lakes

Significant habitat effects influence protist fitness: evidence for local adaptation from acidic mining lakes

Influence of bioturbation on the biogeochemistry of littoral sediments of an acidic post-mining pit lake

ALGAE AS COMPETITORS FOR GLUCOSE WITH HETEROTROPHIC BACTERIA¹

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High Heterotrophic Bacterial Production in Acidic, Iron-Rich Mining Lakes

Cited by 48 publications

References 37 publications

Significant habitat effects influence protist fitness: evidence for local adaptation from acidic mining lakes

Significant habitat effects influence protist fitness: evidence for local adaptation from acidic mining lakes

Influence of bioturbation on the biogeochemistry of littoral sediments of an acidic post-mining pit lake

ALGAE AS COMPETITORS FOR GLUCOSE WITH HETEROTROPHIC BACTERIA1

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ALGAE AS COMPETITORS FOR GLUCOSE WITH HETEROTROPHIC BACTERIA¹