Variation in Microbial Biomass and Activity in Four Different Wetland Types

Groffman, Peter M.; Kiviat, Erik; Stevens, Gretchen

doi:10.2136/sssaj1996.03615995006000020041x

Cited by 97 publications

(62 citation statements)

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“…The soils in this experiment differed by over 3-fold in soil organic matter content (Table 1), and organic matter content of soils is a strong regulator of microbial activity and biomass (Groffman et al, 1996;Sutton-Grier et al, 2009). In comparison to the freshwater marsh, the brackish marsh soils contained more soil organic matter, higher microbial biomass, and supported higher rates of mineralization on a per gram basis ( Fig.…”

Section: Role Of Electron Donors: Carbon Quantity and Qualitymentioning

confidence: 88%

Electron donors and acceptors influence anaerobic soil organic matter mineralization in tidal marshes

Sutton‐Grier

Keller

Koch

et al. 2011

Soil Biology and Biochemistry

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Section: Role Of Electron Donors: Carbon Quantity and Qualitymentioning

confidence: 88%

Electron donors and acceptors influence anaerobic soil organic matter mineralization in tidal marshes

Sutton‐Grier

Keller

Koch

et al. 2011

Soil Biology and Biochemistry

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“…Several authors have proposed that vascular plants, and to a lesser extent bryophytes, are key promoters in the selection of specific microbial communities inhabiting the soil (Smalla et al, 2001;Kowalchuk et al, 2002), although some authors have stated that soil characteristics could be the major factors that determine rhizosphere microbial populations in areas populated by certain kinds of plants, for example, different grass species (Singh et al, 2007). Other authors have observed that soil characteristics can be more relevant to microbial diversity than the rhizosphere effect (Groffman et al, 1996;Jonhson et al, 2003;Garbeva et al, 2004). Buyer et al (1999) also failed to observe differences among the microbial communities from rhizospheres from different plant species growing in the same soil.…”

Section: Discussionmentioning

confidence: 99%

Bacterial diversity in rhizosphere soil from Antarctic vascular plants of Admiralty Bay, maritime Antarctica

et al. 2010

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The Antarctic is a pristine environment that contributes to the maintenance of the global climate equilibrium. The harsh conditions of this habitat are fundamental to selecting those organisms able to survive in such an extreme habitat and able to support the relatively simple ecosystems. The DNA of the microbial community associated with the rhizospheres of Deschampsia antarctica Desv (Poaceae) and Colobanthus quitensis (Kunth) BartI (Caryophyllaceae), the only two native vascular plants that are found in Antarctic ecosystems, was evaluated using a 16S rRNA multiplex 454 pyrosequencing approach. This analysis revealed similar patterns of bacterial diversity between the two plant species from different locations, arguing against the hypothesis that there would be differences between the rhizosphere communities of different plants. Furthermore, the phylum distribution presented a peculiar pattern, with a bacterial community structure different from those reported of many other soils. Firmicutes was the most abundant phylum in almost all the analyzed samples, and there were high levels of anaerobic representatives. Also, some phyla that are dominant in most temperate and tropical soils, such as Acidobacteria, were rarely found in the analyzed samples. Analyzing all the sample libraries together, the predominant genera found were Bifidobacterium (phylum Actinobacteria), Arcobacter (phylum Proteobacteria) and Faecalibacterium (phylum Firmicutes). To the best of our knowledge, this is the first major bacterial sequencing effort of this kind of soil, and it revealed more than expected diversity within these rhizospheres of both maritime Antarctica vascular plants in Admiralty Bay, King George Island, which is part of the South Shetlands archipelago.

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“…These conditions, combined with the absence of oxygen, low temperature and vegetation producing chemical inhibitors, impede the decay of bog plants and allow the accumulation of partially decomposed organic matter, known as peat (Williams and Crawford, 1983;Groffman et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Today, microbial comparison of natural, post-vacuum extracted and restoration ombrotrophic peatlands are limited and bio-indicators are not available. Also, microbial processes are essential for nutrients transformation and cycling in peat, plant productivity and ecosystem functioning (Clymo, 1991;Maltby, 1992;Groffman et al, 1996). Nitrogen released by mineralization, a microbial process, is an important component of soil fertility and nitrification is an important indicator of N availability in ecosytems (Groffman et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Also, microbial processes are essential for nutrients transformation and cycling in peat, plant productivity and ecosystem functioning (Clymo, 1991;Maltby, 1992;Groffman et al, 1996). Nitrogen released by mineralization, a microbial process, is an important component of soil fertility and nitrification is an important indicator of N availability in ecosytems (Groffman et al, 1996). Therefore, differences in microbial processes can be reflected on the peat N content, but again, such bio-indicators are not available to assess N availability within the different peatland ecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Vacuum-extraction of peatlands disturbs bacterial population and microbial biomass carbon

Croft

Rochefort

Beauchamp

2001

Applied Soil Ecology

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Knowledge concerning the microbial characteristics of natural and post-vacuum extracted ombrotrophic peatlands, as well as peatlands under restoration is limited. In one experiment, microbial comparisons of paired neighboring natural and post-vacuum peatlands in eastern Québec (Canada) were studied to assess the effects of peat mining on microbial indicators and nitrogen (N) cycling. Microbial counts, microbial biomass carbon (MB-C) and N mineralization were examined over two growing seasons. Also, in a second experiment, bio-indicators of the microbial status (microbial counts, MB-C and the quotient of MB-C to total carbon) of one peatland harboring natural, restored and post-vacuum extracted treatments were assessed sporadically over 6 years. The first experiment revealed that peat mining decreased populations of total bacteria, hemicellulolytic and cellulolytic microorganisms and MB-C, but increased peat ammonium content and N mineralization. The bacterial population was found to be lower in the post-vacuum extracted treatment than in natural treatment (control) and under restoration treatment, whereas the actinomycete population was higher in the post-vacuum extracted and restoration treatments than the natural one. Over the 6-year-time course experiment, the MB-C, total C and their quotient revealed a gradual increase in the peatland under restoration, but they remained similar in the post-vacuum extracted peatland treatment. This supports the concept that the total bacterial population and MB-C may be used as an ecological indicator to monitor major site disturbance using paired natural restored peatland. Published by Elsevier Science B.V.

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Variation in Microbial Biomass and Activity in Four Different Wetland Types

Cited by 97 publications

References 0 publications

Electron donors and acceptors influence anaerobic soil organic matter mineralization in tidal marshes

Electron donors and acceptors influence anaerobic soil organic matter mineralization in tidal marshes

Bacterial diversity in rhizosphere soil from Antarctic vascular plants of Admiralty Bay, maritime Antarctica

Vacuum-extraction of peatlands disturbs bacterial population and microbial biomass carbon

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