Bacteria and microbial-feeders modify the performance of a decomposer fungus

Nieminen, Jouni K.; Setälä, Heikki

doi:10.1016/s0038-0717(01)00093-1

Cited by 19 publications

(16 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A study on the decomposition of marine macrophytes suggested that an increase in total detrital N occurs through the production of mucopolysaccharide exudates by bacteria (Hobbie & Lee 1980), and that such exudates may be incorporated in humic macromolecules in the detritus (Rice & Hanson 1984). Recently, Nieminen & Setala (2001) indicated that organic C increases in the presence of bacteria because bacteria are more efficient at decomposing organic C than fungi. In Week 18, the concentration of FFAs in Bruguiera gymnorrhiza was not significantly different from FFAs in the mangrove sediments.…”

Section: Role Of Microbes and Microbial Activitymentioning

confidence: 99%

Fatty acids in decomposing mangrove leaves: microbial activity, decay and nutritional quality

Mfilinge¹,

Méziane²,

Bachok³

et al. 2003

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Changes in lipid content and fatty acid (FA) composition in decomposing mangrove leaves of Bruguiera gymnorrhiza (L.) Lamk and Kandelia candel (L.) were investigated in a subtropical mangrove forest on Okinawa Island, Japan (26.5°N, 128°E) by field experiments for 18 wk (July to November 2000), using yellow senescent leaves, and compared with FAs in the green leaves and mangrove sediments. We tested the hypothesis that changes in FA composition during decomposition can indicate the state of leaf decay and periods of high and low microbial activity, and that bacteria may rapidly degrade polyunsaturated fatty acids (PUFAs). During decay, FA composition in the yellow leaves changed in 2 wk from predominantly saturated FAs to monounsaturated FAs, and to the more branched FAs typical of bacteria, and lipid and N increased due to microbial colonization. However, the microbial decomposition of leaves did not alter the concentrations of long-chain fatty acids (LCFAs), suggesting that these vascular plant-markers remain unchanged in mangrove detritus and surface sediments for more than 4 mo. Furthermore, bacteria did not degrade PUFAs as we had hypothesized, indicating that during decomposition of mangrove leaves, bacteria tend to conserve PUFAs (as they do nitrogen), thus enriching the detritus with nutrients. Comparison of ω3 and ω6 PUFAs between the 2 species showed that nutritional quality varies greatly with the state of the leaf material, increasing through time in B. gymnorrhiza and decreasing through time in K. candel.

show abstract

Section: Role Of Microbes and Microbial Activitymentioning

confidence: 99%

Fatty acids in decomposing mangrove leaves: microbial activity, decay and nutritional quality

Mfilinge¹,

Méziane²,

Bachok³

et al. 2003

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…The experimental methods have been described in Nieminen and Setälä (2001). Briefly, the six food webs constructed in laboratory microcosms were: a saprotrophic fungus Cladosporium herbarum alone (F) or with a fungal-feeding nematode Aphelenchoides sp.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The extraction time was based on a preliminary experiment continued for several days with the samples checked regularly (Nieminen & Setälä, 2001;unpubl.). The cumulative number of extracted nematodes increased rapidly for 3 days, and then continued to increase slowly, apparently because of hatching.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Non-trophic interactions have only recently been included in theoretical food web models (Goudard & Loreau, 2008). Nieminen and Setälä (2001) used nutrient-limited microcosms to study the importance of a fungal-feeding nematode and a bacterial-based food chain to functioning and stability of a common early successional sugar fungus. Recent theoretical advancement (Nieminen, 2008b) makes it possible to analyse the food web beyond their conclusions.…”

mentioning

confidence: 99%

“…Simple experimental systems are typically strongly limited by a small number of basal resources making it possible to split the system dynamics into a few phases determined by the limiting resources, which can be described by linear differential or difference equations. The purpose of this paper is to formulate a piecewise linear food web model, and fit the model to data from microcosms including different combinations of the four component species (Nieminen & Setälä, 2001, supplemented with previously unpublished data from systems without fungi). Unlike classical trophic-dynamic models, the model allowed the presence of microbial-feeders to modify the parameters representing microbial properties.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Modelling the interactions of soil microbes and nematodes

Nieminen

2009

Nematol

Self Cite

View full text Add to dashboard Cite

Six different soil food webs, assembled from a bacterium, a bacterial-feeding nematode, a fungus and a fungal-feeding nematode, were established in replicated laboratory microcosms. Glucose was supplied as the sole carbon source for the microbes. Biomasses of the organisms and the concentration of dissolved organic carbon (DOC) were measured ten times during 20 weeks. A discrete dynamic model based on the material flow between system components was fitted to the experimental data. Bacterial-based food chains were largely inactive in the absence of fungi, but mutual facilitation was observed in the systems with both fungus and bacterium. The population dynamics of a fungal-feeding nematode was adequately described by the models, but the model failed to describe DOC dynamics. The quality of fungal biomass appeared to be a key parameter in the system. Model performance was improved by letting fungal parameters vary with time and food web structure. Because fungal dynamics could not be explained by a trophic-dynamic model with rigid parameters, it is suggested that non-trophic effects of fungal-feeding nematodes on fungi may be more important in microcosms.

show abstract

Root-Associated Mycobiomes of Common Temperate Plants (Calluna vulgaris and Holcus lanatus) Are Strongly Affected by Winter Climate Conditions

et al. 2021

View full text Add to dashboard Cite

Winter temperatures are projected to increase in Central Europe. Subsequently, snow cover will decrease, leading to increased soil temperature variability, with potentially different consequences for soil frost depending on e.g. altitude. Here, we experimentally evaluated the effects of increased winter soil temperature variability on the root associated mycobiome of two plant species (Calluna vulgaris and Holcus lanatus) at two sites in Germany; a colder and wetter upland site with high snow accumulation and a warmer and drier lowland site, with low snow accumulation. Mesocosm monocultures were set-up in spring 2010 at both sites (with soil and plants originating from the lowland site). In the following winter, an experimental warming pulse treatment was initiated by overhead infrared heaters and warming wires at the soil surface for half of the mesocosms at both sites. At the lowland site, the warming treatment resulted in a reduced number of days with soil frost as well as increased the average daily temperature amplitude. Contrary, the treatment caused no changes in these parameters at the upland site, which was in general a much more frost affected site. Soil and plant roots were sampled before and after the following growing season (spring and autumn 2011). High-throughput sequencing was used for profiling of the root-associated fungal (ITS marker) community (mycobiome). Site was found to have a profound effect on the composition of the mycobiome, which at the upland site was dominated by fast growing saprotrophs (Mortierellomycota), and at the lowland site by plant species-specific symbionts (e.g. Rhizoscyphus ericae and Microdochium bolleyi for C. vulgaris and H. lanatus respectively). The transplantation to the colder upland site and the temperature treatment at the warmer lowland site had comparable consequences for the mycobiome, implying that winter climate change resulting in higher temperature variability has large consequences for mycobiome structures regardless of absolute temperature of a given site.

show abstract

Bacteria and microbial-feeders modify the performance of a decomposer fungus

Cited by 19 publications

References 29 publications

Fatty acids in decomposing mangrove leaves: microbial activity, decay and nutritional quality

Fatty acids in decomposing mangrove leaves: microbial activity, decay and nutritional quality

Modelling the interactions of soil microbes and nematodes

Root-Associated Mycobiomes of Common Temperate Plants (Calluna vulgaris and Holcus lanatus) Are Strongly Affected by Winter Climate Conditions

Contact Info

Product

Resources

About