The potential of methanotrophic bacteria to compensate for food quantity or food quality limitations in Daphnia

Deines, Peter; Fink, Patrick

doi:10.3354/ame01542

Cited by 18 publications

(15 citation statements)

References 70 publications

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“…Heterotrophic bacteria, such as Actinobacteria and Proteobacteria are typical in the oxic epilimnia of the lakes (Zwart et al 2002, Jezberova´et al 2010 where they utilize organic carbon. Several studies have shown qualitative differences between bacterial taxa as diet sources for zooplankton (Deines and Fink 2011, MartinCreuzburg et al 2011, Taipale et al 2012, Wenzel et al 2012. The results obtained in the present study with Actinobacterium VicMua1 were similar with the previous results on Daphnia fed with heterotrophic Micrococcus luteus (Taipale et al 2012), indicating that Daphnia can maintain high somatic growth rates when Actinobacteria is mixed with high-quality phytoplankton.…”

Section: Discussionsupporting

confidence: 82%

Differing Daphnia magna assimilation efficiencies for terrestrial, bacterial, and algal carbon and fatty acids

Taipale

Brett

Hahn

et al. 2014

Ecology

112

142

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Kankaala, P. (2014). Differing Daphnia magna assimilation efficiencies for terrestrial, bacterial, and algal carbon and fatty acids. Ecology, 95 (2), 563-576. doi:10.1890/13-0650.1 Retrieved from http://www.esajournals.org/doi/abs/10.1890/13-0650.1 2014Publisher's PDF Ecology, 95(2), 2014Ecology, 95(2), , pp. 563-576 Ó 2014 Abstract. There is considerable interest in the pathways by which carbon and growthlimiting elemental and biochemical nutrients are supplied to upper trophic levels. Fatty acids and sterols are among the most important molecules transferred across the plant-animal interface of food webs. In lake ecosystems, in addition to phytoplankton, bacteria and terrestrial organic matter are potential trophic resources for zooplankton, especially in those receiving high terrestrial organic matter inputs. We therefore tested carbon, nitrogen, and fatty acid assimilation by the crustacean Daphnia magna when consuming these resources. We fed Daphnia with monospecific diets of high-quality (Cryptomonas marssonii ) and intermediate-quality (Chlamydomonas sp. and Scenedesmus gracilis) phytoplankton species, two heterotrophic bacterial strains, and particles from the globally dispersed riparian grass, Phragmites australis, representing terrestrial particulate organic carbon (t-POC). We also fed Daphnia with various mixed diets, and compared Daphnia fatty acid, carbon, and nitrogen assimilation across treatments. Our results suggest that bacteria were nutritionally inadequate diets because they lacked sterols and polyunsaturated omega-3 and omega-6 (x-3 and x-6) fatty acids (PUFAs). However, Daphnia were able to effectively use carbon and nitrogen from Actinobacteria, if their basal needs for essential fatty acids and sterols were met by phytoplankton. In contrast to bacteria, t-POC contained sterols and x-6 and x-3 fatty acids, but only at 22%, 1.4%, and 0.2% of phytoplankton levels, respectively, which indicated that t-POC food quality was especially restricted with regard to x-3 PUFAs. Our results also showed higher assimilation of carbon than fatty acids from t-POC and bacteria into Daphnia, based on stable-isotope and fatty acids analysis, respectively. A relatively high (.20%) assimilation of carbon and fatty acids from t-POC was observed only when the proportion of t-POC was .60%, but due to low PUFA to carbon ratio, these conditions yielded poor Daphnia growth. Because of lower assimilation for carbon, nitrogen, and fatty acids from t-POC relative to diets of bacteria mixed with phytoplankton, we conclude that the microbial food web, supported by phytoplankton, and not direct t-POC consumption, may support zooplankton production. Our results suggest that terrestrial particulate organic carbon poorly supports upper trophic levels of the lakes.

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Section: Discussionsupporting

confidence: 82%

Differing Daphnia magna assimilation efficiencies for terrestrial, bacterial, and algal carbon and fatty acids

Taipale

Brett

Hahn

et al. 2014

Ecology

112

142

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“…In support, stable isotope analysis has indicated that methanotrophic bacteria, containing sterols, can significantly contribute to the Daphnia diet and enhance reproduction and sometimes growth (Taipale et al . , , ; Deines & Fink ; Martin‐Creuzburg et al . ).…”

Section: Bacteria As Food In Aquaculturementioning

confidence: 99%

Bacteria as food in aquaculture: do they make a difference?

Nevejan

Schryver

Wille

et al. 2016

Reviews in Aquaculture

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Bacterioplankton is an important component of marine as well as fresh waters and accounts for a large fraction of the production of particulate matter in those ecosystems. The concept of bacteria as providers of essential nutrients in aquatic food webs has been raised most recently in relation to the utilization of bacteria as a food source in aquaculture food chains. This article represents a comprehensive review on the potential role of bacteria as a direct food source for aquaculture organisms. After studying shortly the analytical tools that can be applied to determine the uptake and assimilation of bacteria by higher trophic levels, it describes the bacterial loads that are found in closed and open aquaculture systems and elaborates on the composition of bacteria from a nutritional point of view. Next this study elaborates in more detail on the role of bacteria as food for the zooplankton groups used as live food in aquaculture hatcheries and for various groups of aquaculture target organisms, such as fish, crustaceans and especially bivalves. This includes an assessment of the specific uptake mechanisms of the different taxonomic groups of interest in relation to their efficiency to ingest bacteria. Finally, future research lines are suggested to elucidate the nutritional impact of the bacterial community in aquaculture systems and how to steer this in order to optimize the production.

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“…from small, strongly stratifying lakes with anoxic hypolimnia; for example, −47‰ in a kettle lake, Plußsee (Harrod and Grey, 2006), or −46‰ from Mekkojarvi (Taipale et al, 2008). Laboratory support for zooplankton uptake of MOB is sparse, but (Kankaala et al, 2006) measured growth rates of Daphnia in replicated cultures fed microbial suspensions with or without addition of CH 4 and found that their δ 13 C values indicated consumption of 13 C-depleted MOB, as have (Deines and Fink, 2011) using 13 C-labeling of CH 4 .…”

Section: Looked At a Variety Of Sites Including Ch 4 Seeps In The Gulfmentioning

confidence: 99%

The Incredible Lightness of Being Methane-Fuelled: Stable Isotopes Reveal Alternative Energy Pathways in Aquatic Ecosystems and Beyond

Grey

2016

Front. Ecol. Evol.

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We have known about the processes of methanogenesis and methanotrophy for over 100 years, since the days of Winogradsky, yet their contributions to the carbon cycle were deemed to be of negligible importance for the majority of that period. It is only in the last two decades that methane has been appreciated for its role in the global carbon cycle, and stable isotopes have come to the forefront as tools for identifying and tracking the fate of methane-derived carbon (MDC) within food webs, especially within aquatic ecosystems. While it is not surprising that chemosynthetic processes dominate and contribute almost 100% to the biomass of organisms residing within extreme habitats like deep ocean hydrothermal vents and seeps, way below the reach of photosynthetically active radiation, it is perhaps counterintuitive to find reliance upon MDC in shallow, well-lit, well-oxygenated streams. Yet, apparently, MDC contributes to varying degrees across the spectrum from point sources to extremely diffuse sources. Certainly a good proportion of the evidence for MDC contributing to freshwater food webs comes from somewhere in the middle of that spectrum; from studies of seasonally stratifying lakes (mono-or dimictic) wherein, there is a defined gradient or boundary at which anoxic meet oxic conditions and consequently allows for close coupling of methanogenesis and methanotrophy. However, even seemingly well-mixed (polymictic) lakes have a contribution of MDC contributing to the benthic biomass, despite an almost continual supply of photosynthetic carbon being delivered from the surface. Aside from the fundamental importance of identifying the carbon sources fuelling biomass production, stable isotopes have been integral in the tool box of palaeolimnologists seeking to identify how contributions from methane have waxed and waned over time. Here, we synthesize the current state of knowledge in the use of stable isotopes to trace MDC in primarily freshwater ecosystems.

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The potential of methanotrophic bacteria to compensate for food quantity or food quality limitations in Daphnia

Cited by 18 publications

References 70 publications

Differing Daphnia magna assimilation efficiencies for terrestrial, bacterial, and algal carbon and fatty acids

Differing Daphnia magna assimilation efficiencies for terrestrial, bacterial, and algal carbon and fatty acids

Bacteria as food in aquaculture: do they make a difference?

The Incredible Lightness of Being Methane-Fuelled: Stable Isotopes Reveal Alternative Energy Pathways in Aquatic Ecosystems and Beyond

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