Compaction of forest soils with heavy logging machinery affects soil bacterial community structure

Frey, Beat; Kremer, Johannes; Rüdt, Andreas; Sciacca, S.; Matthies, Dietmar; Lüscher, Peter

doi:10.1016/j.ejsobi.2009.05.006

Cited by 116 publications

(102 citation statements)

References 49 publications

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“…Landscape features such as glaciers have the potential to create strong landscape heterogeneity by dictating coarse-scale physicochemical characteristics of habitats over time and space. Hydrogeochemical conditions, disturbance as well as spatial connectivity between aquatic systems can be altered by glaciers, and it has been shown that these mechanisms can influence BCC (Sekar et al, 2002;Frey et al, 2009;Langenheder et al, 2011). In contrast, lake outlet streams or groundwater-fed streams provide more spatiotemporal stability and a more homogeneous landscape (Tockner et al, 1997;Brown et al, 2003), and the smaller fluctuations in physicochemical characteristics in such habitats cause reduced variability in bacterial communities.…”

Section: Discussionmentioning

confidence: 99%

Bacterial structures and ecosystem functions in glaciated floodplains: contemporary states and potential future shifts

et al. 2013

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Glaciated alpine floodplains are responding quickly to climate change through shrinking ice masses. Given the expected future changes in their physicochemical environment, we anticipated variable shifts in structure and ecosystem functioning of hyporheic microbial communities in proglacial alpine streams, depending on present community characteristics and landscape structures. We examined microbial structure and functioning during different hydrologic periods in glacial (kryal) streams and, as contrasting systems, groundwater-fed (krenal) streams. Three catchments were chosen to cover an array of landscape features, including interconnected lakes, differences in local geology and degree of deglaciation. Community structure was assessed by automated ribosomal intergenic spacer analysis and microbial function by potential enzyme activities. We found each catchment to contain a distinct bacterial community structure and different degrees of separation in structure and functioning that were linked to the physicochemical properties of the waters within each catchment. Bacterial communities showed high functional plasticity, although achieved by different strategies in each system. Typical kryal communities showed a strong linkage of structure and function that indicated a major prevalence of specialists, whereas krenal sediments were dominated by generalists. With the rapid retreat of glaciers and therefore altered ecohydrological characteristics, lotic microbial structure and functioning are likely to change substantially in proglacial floodplains in the future. The trajectory of these changes will vary depending on contemporary bacterial community characteristics and landscape structures that ultimately determine the sustainability of ecosystem functioning.

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Section: Discussionmentioning

confidence: 99%

Bacterial structures and ecosystem functions in glaciated floodplains: contemporary states and potential future shifts

et al. 2013

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“…These authors also found a nearly 100-fold increase in cultivable methanogens in the compacted compared to the uncompacted soils. Terminal restriction fragment length polymorphism (T-RFLP) genetic profiling of DNA directly extracted from severely compacted wheel tracks in field experiments showed that total microbial community structures in compacted wheel tracks were changed compared to those of the unaffected soils (15). However, little is known about the structure and function of methanogenic communities in these well-aerated or compacted forest soils.…”

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confidence: 99%

Heavy-Machinery Traffic Impacts Methane Emissions as Well as Methanogen Abundance and Community Structure in Oxic Forest Soils

Frey

Niklaus

Kremer

et al. 2011

Appl Environ Microbiol

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Temperate forest soils are usually efficient sinks for the greenhouse gas methane, at least in the absence of significant amounts of methanogens. We demonstrate here that trafficking with heavy harvesting machines caused a large reduction in CH 4 consumption and even turned well-aerated forest soils into net methane sources. In addition to studying methane fluxes, we investigated the responses of methanogens after trafficking in two different forest sites. Trafficking generated wheel tracks with different impact (low, moderate, severe, and unaffected). We found that machine passes decreased the soils' macropore space and lowered hydraulic conductivities in wheel tracks. Severely compacted soils yielded high methanogenic abundance, as demonstrated by quantitative PCR analyses of methyl coenzyme M reductase (mcrA) genes, whereas these sequences were undetectable in unaffected soils. Even after a year after traffic compression, methanogen abundance in compacted soils did not decline, indicating a stability of methanogens here over time. Compacted wheel tracks exhibited a relatively constant community structure, since we found several persisting mcrA sequence types continuously present at all sampling times. Phylogenetic analysis revealed a rather large methanogen diversity in the compacted soil, and most mcrA gene sequences were mostly similar to known sequences from wetlands. The majority of mcrA gene sequences belonged either to the order Methanosarcinales or Methanomicrobiales, whereas both sites were dominated by members of the families Methanomicrobiaceae Fencluster, with similar sequences obtained from peatland environments. The results show that compacting wet forest soils by heavy machinery causes increases in methane production and release.

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“…Consequently, it causes decreased growth (biomass) responses of the whole plant and of the plant´s components such as stem, shoot, leaves, roots (Jourgholami et al, 2016). Adverse effect of soil compaction mainly occurs through increasing soil bulk density and soil strength, decreasing macro porosity, soil water infiltration and water-holding capacity, what may negatively influence soil biological properties (Frey et al, 2009). In profile under Austrian pines, exceeding critical ρ d and P T in fragic (fg) horizon was caused by high content of gravel (30%) and sand (65%).…”

Section: Resultsmentioning

confidence: 99%

Characteristics of physical properties in soil profiles under selected introduced trees in the Nature Reserve Arboretum Mlyňany, Slovakia

2017

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Polláková, N., Šimanský, V., Jonczak, J., 2017. Characteristics of physical properties in soil profiles under selected introduced trees in the Nature Reserve Arboretum Mlyňany, Slovakia. Folia Oecologica, The relationship between introduced trees roots and soils in which they grow is the most important factor influencing the adaptation, growth and health of these trees. Therefore, the objective of this study was to identify which physical soil properties enhance or limit the vitality of the studied introduced trees in the Arboretum Mlyňany. Soil properties were studied in seven soil profiles under dense monocultures of Chamaecyparis lawsoniana, Liriodendron tulipifera, Juniperus Chinensis, Thuja orientalis, Thuja plicata, Picea orientalis and Pinus nigra. The results showed that all stagnic horizons had exceeded the limit values of total porosity and bulk density, hence these horizons were compacted. Based on the soil and climatic requirements of the examined trees we conclude that the soil properties of their sites in arboretum are suitable for: Chamaecyparis lawsoniana, Liriodendron tulipifera, Thuja orientalis and Pinus nigra. Nevertheless, physical properties in profiles under Picea orientalis and Juniperus Chinensis do not permit rapid drainage of water, what is unfavourable for healthy development of these two species; while Thuja plicata demanding high moisture supply is grown on soil with high coarse porosity, a prerequisite of fast rainwater drainage. However, since none of the studied introduced trees had suffered from physiological disorders or diseases, they may be declared acclimatized well in the soil-climate conditions described in this study.

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Compaction of forest soils with heavy logging machinery affects soil bacterial community structure

Cited by 116 publications

References 49 publications

Bacterial structures and ecosystem functions in glaciated floodplains: contemporary states and potential future shifts

Bacterial structures and ecosystem functions in glaciated floodplains: contemporary states and potential future shifts

Heavy-Machinery Traffic Impacts Methane Emissions as Well as Methanogen Abundance and Community Structure in Oxic Forest Soils

Characteristics of physical properties in soil profiles under selected introduced trees in the Nature Reserve Arboretum Mlyňany, Slovakia

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