Mechanisms of Microarthropod-Microbial Interactions in Soil

Lussenhop, John

doi:10.1016/s0065-2504(08)60145-2

Cited by 242 publications

(131 citation statements)

References 101 publications

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“…In the forest-floor food web, Collembola affect litter disappearance directly by feeding on litter and indirectly through litter comminution, inoculation with microbes, and fungal grazing (17). Numbers of the large-bodied, active Collembola (numbers of Entomobryidae and Tomoceridae combined) were marginally higher at lower spider densities compared with the treatment with natural densities of spiders ( Fig.…”

Section: Resultsmentioning

confidence: 94%

“…Collembola affect litter disappearance directly by feeding on litter and indirectly through litter comminution, inoculation with microbes, and fungal grazing (17). Intermediate levels of fungal grazing by Collembola can stimulate fungal growth and promote litter decomposition, whereas overgrazing can depress fungal populations, causing a decline in rates of decomposition (20,21).…”

Section: Discussionmentioning

confidence: 99%

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Predicted climate change alters the indirect effect of predators on an ecosystem process

Lensing

Wise

2006

Proc. Natl. Acad. Sci. U.S.A.

100

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Changes in rainfall predicted to occur with global climate change will likely alter rates of leaf-litter decomposition through direct effects on primary decomposers. In a field experiment replicated at two sites, we show that altered rainfall may also change how cascading trophic interactions initiated by arthropod predators in the leaf litter indirectly influence litter decomposition. On the drier site there was no interaction between rainfall and the indirect effect of predators on decomposition. In contrast, on the moister site spiders accelerated the disappearance rate of deciduous leaf litter under low rainfall, but had no, or possibly a negative, indirect effect under high rainfall. Thus, changes resulting from the more intense hydrological cycle expected to occur with climate change will likely influence how predators indirectly affect an essential ecosystem process.detrital food web ͉ litter decomposition ͉ rainfall ͉ spiders ͉ trophic cascade C limate-change models predict a more intense hydrological cycle with both increases in rainfall and increased length and severity of droughts (1, 2). Changes in rainfall will likely affect ecosystem processes such as primary production and nutrient release from decomposing litter caused by direct effects of altered rainfall on plants and primary decomposers, respectively. For example, low moisture can inhibit fungal growth and͞or activity (3, 4). Changes in rainfall may also alter how trophic interactions indirectly influence rates of ecosystem processes. Recent research has shown that climatic changes may have large impacts on how predators indirectly alter net primary production through trophic cascades (reviewed in refs. 5-8). In detritusbased food webs predators have the potential to influence indirectly the amount of leaf litter through trophic interactions that affect rates of decomposition. This chain of interactions is a trophic cascade (9-12) analogous to the classic cascade affecting living plants. In grassland systems litter in cages accessible to large arthropod predators exhibited lower rates of litter disappearance compared with predator-exclusion cages (13,14), although other similar experiments in grasslands revealed a negligible impact of these predators on decomposition rate (15). In a forest-floor system, experimentally reducing spider numbers also accelerated the rate of disappearance of a straw test litter (16). However, a longer-term experiment using natural canopy litter produced an opposite effect, with litter decomposing more rapidly at higher spider densities (12). This extreme variation in the sign of the indirect effect of spiders and other predators on decomposition, from negative through zero to positive, may at least partly reflect differences in abiotic factors between sites and years. The unexpected enhancement of decomposition by spiders in the forest-floor experiment occurred during a period of unusually low rainfall (12), which suggests that large changes in moisture, such as those predicted by climate-change models, may affect ...

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Section: Resultsmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Predicted climate change alters the indirect effect of predators on an ecosystem process

Lensing

Wise

2006

Proc. Natl. Acad. Sci. U.S.A.

100

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“…Meanwhile, Oribatidas are sensitive to natural disturbance and human activity because of their slow growth, low reproductive potential, iteroparity, and long adult life span (Behan-Pelletier, 1999). Previous studies demonstrated that Oribatida mites performed important functions during litter decomposition (Scheu et al, 2005) via direct litter comminution, litter fragmentation or dispersal of microbial propagules via physical movement, and selective grazing on microbial communities (Lussenhop, 1992). Because of their great sensitivity to environmental change and their prominent roles in increasing soil fertility through organic decomposition, Oribatida mites are useful biological indicators of changes in the soil habitat (BehanPelletier, 1999).…”

Section: Introductionmentioning

confidence: 99%

Do shifts in soil Oribatida (Acari, Oribatida) give information on differences in fruit yield of Chinese star anise?

Yang

Liu

et al. 2015

Agriculture, Ecosystems & Environment

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“…Soil mesofauna aect the structure and activity of microbial communities and enhance nutrient turnover (Coleman, 1986;Verhoef and Brussaard, 1990;Lussenhop, 1992). The mechanisms of the eects have been demonstrated in a number of studies.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanisms of the eects have been demonstrated in a number of studies. Substrate comminution and mixing by microarthropods were associated with increased metabolic rates of bacteria (Lussenhop, 1992). Fungal grazing by microarthropods was accompanied by a changing growth pattern and by the release of enzymes of fungi (Bengtsson et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Chemical Communications

Omenetto¹,

Kaplan²

2012

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Using ®eld mesocosms maintained for 6 months in an acid spruce forest, we investigated the in¯uence of microarthropods on biomass, structure and function of the soil microbial community. In the litter layer (L/F layer), the re-immigration of mesofauna into mesocosms did not signi®cantly aect substrate-induced respiration (SIR), biomass C, biomass N, biomass P, Nmineralisation or enzymes involved in N cycling. There was no eect of the mesofauna on the biomarkers for fungal biomass (ergosterol and phospholipid fatty acid 18:2o6) in the litter layer. Mesofauna activities increased microbial biomass (biomass C, N and P) in the H layer, and signi®cantly increased soil protease activity and phosphate content in the H layer. Since biomass P did not change signi®cantly when mesofauna recolonised mesocosms, they presumably aected P-mineralisation by producing Prich faeces. Discriminant analysis showed that mesofauna aected microbial N-mobilisation in the H layer. Higher protease and arginine deaminase activities in mesocosms with mesofauna may have been caused by faunal grazing on soil microorganisms. #

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Mechanisms of Microarthropod-Microbial Interactions in Soil

Cited by 242 publications

References 101 publications

Predicted climate change alters the indirect effect of predators on an ecosystem process

Predicted climate change alters the indirect effect of predators on an ecosystem process

Do shifts in soil Oribatida (Acari, Oribatida) give information on differences in fruit yield of Chinese star anise?

Chemical Communications

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