Do organic inputs alter resistance and resilience of soil microbial community to drying?

Ng, Ee Ling; Patti, Antonio F.; Rose, Michael T.; Schefe, Cassandra; Smernik, Ronald J.; Cavagnaro, Timothy R.

doi:10.1016/j.soilbio.2014.10.028

Cited by 34 publications

(20 citation statements)

References 61 publications

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“…In addition to these direct effects, soil microbial activity was also sensitive to the identity of litter inputs, and this sensitivity was dependent on soil moisture. Differences in respiration rates associated with litter additions were more prominent in the soils in the high pulse treatment versus in the low pulse treatment, suggesting that substrate limitation is secondary to soil moisture limitations for microbes in drought conditions (Ng et al 2015). In soils with high moisture, our results finding that litter from the exotic species was associated with increased soil activity was likely due to associated faster decomposition rates of exotic species (Liao et al 2008).…”

Section: Discussionmentioning

confidence: 64%

Direct and indirect effects of shifting rainfall on soil microbial respiration and enzyme activity in a semi-arid system

2016

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Background and aims Higher interannual precipitation variability is predicted for Southern California's shrubdominated systems, promoting soil moisture variation and changing community composition. We asked if soil microbial responses to rainfall regime will depend on litter inputs; showing direct effects of altered precipitation through soil moisture and indirect effects resulting from shifting litter inputs. Methods Soils were collected from a 2-year field rainfall manipulation experiment. Under lab conditions soils were subjected to high or low moisture pulses with litter amendments from native and exotic species in all combinations. Results Soil respiration was higher with larger water pulses, but rose over time in low pulse treatments (direct response). Litter additions from exotic species promoted greater respiration, and results were stronger under higher soil moisture (indirect response). Extracellular enzyme activities generally were higher with exotic litter and under high moisture pulses. Those involved in N-cycling had much larger increases activity for the exotic litter addition-high moisture pulse scenarios compared to other treatments. Conclusions Our results indicate the potential for microbial acclimation to drought conditions over short timescales and that below-ground processes are sensitive to direct and indirect effects of shifting rainfall regimes, especially where invasion is promoted by future climate change.

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Section: Discussionmentioning

confidence: 64%

Direct and indirect effects of shifting rainfall on soil microbial respiration and enzyme activity in a semi-arid system

2016

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“…Schweitzer et al [53] reported that plant gene diversity may alter soil microbial communities and their activities, which may have extended consequences for soil fertility. Patterns of soil microbial community are also dependent on soil moisture [54]. These factors could have played some role in the changes in the microbial diversity observed in this study.…”

Section: Influence Of Land-use Change On the Soil Microbial Communitymentioning

confidence: 77%

Assessment of the Influence of Oil Palm and Rubber Plantations in Tropical Peat Swamp Soils Using Microbial Diversity and Activity Analysis

Nurulita

Adetutu

Kadali

et al. 2016

JACEN

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In this study, tropical peat swamp soils from Giam Siak Kecil-Bukit Batu Biosphere Reserve (GSKBB) in Indonesia was evaluated to assess the impact of oil palm and rubber plantations on this unique organic soil through comparisons with soils from a natural forest using a polyphasic approach (chemical and molecular microbial assays). Changes in the ammonium, nitrate and phosphate concentration were observed in soils converted to agricultural use. Soil enzyme activities in plantation soils showed reduced β-glucosidase, cellobiohydrolase and acid phosphatase activities (50% -55% decrease). PCR-DGGE based analysis showed that the soil bacterial community from agricultural soils exhibited the lowest similarity amongst the different microbial groups (fungi and Archaea) evaluated (34% similarity to the natural forest soil). Shannon Diversity index values showed that generally the conversion of tropical peatland natural forest to rubber plantation resulted in a greater impact on microbial diversity (ANOVA p < 0.05). Overall, this study indicated substantial shifts in the soil microbial activity and diversity upon conversion of natural peatland forest to agriculture, with a greater change being observed under rubber plantation compared to oil palm plantation. These findings provided important data for future peatland management by relating changes in the soil microbial community and activities associated to agricultural practices carried out on peatland. Y. Nurulita et al.54

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“…Tap water was used to mimic extreme precipitation events, and a watering pot was used to compensate for rain. Rain regimes were designated according to Ng et al 48. in which the average rainfall in the area during August was 3.0 mm/day (based on the average rainfall data during 1983–2013 from the Maoxian Ecological Station of Chinese Academy of Science), and was designated as the control rain regime, while extreme rainfall was designated according to the abnormally high rainfall in August (9.5 mm/day).…”

Section: Methodsmentioning

confidence: 99%

The response of the soil microbial food web to extreme rainfall under different plant systems

Sun

Pan

Tariq

et al. 2016

Sci Rep

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An agroforestry experiment was conducted that involved four planting systems: monoculture of the focal species Zanthoxylum bungeanum and mixed cultures of Z. bungeanum and Capsicum annuum, Z. bungeanum and Medicago sativa and Z. bungeanum and Glycine max. Soil microbial food web (microorganisms and nematodes) was investigated under manipulated extreme rainfall in the four planting systems to assess whether presence of neighbor species alleviated the magnitude of extreme rainfall on nutrient uptake of the focal species by increasing the stability of soil food web. Our results indicate that in the focal species and G. max mixed culture, leaf nitrogen contents of the focal species were higher than in the monoculture and in the other mixed cultures under extreme rainfall. This result was mainly due to the significant increase under extreme rainfall of G. max species root biomass, resulting in enhanced microbial resistance and subsequent net nitrogen mineralization rate and leaf nitrogen uptake for the focal species. Differences in functional traits of neighbors had additive effects and led to a marked divergence of soil food-web resistance and nutrient uptake of the focal species. Climate change can indirectly alleviate focal species via its influence on their neighbors.

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Do organic inputs alter resistance and resilience of soil microbial community to drying?

Cited by 34 publications

References 61 publications

Direct and indirect effects of shifting rainfall on soil microbial respiration and enzyme activity in a semi-arid system

Direct and indirect effects of shifting rainfall on soil microbial respiration and enzyme activity in a semi-arid system

Assessment of the Influence of Oil Palm and Rubber Plantations in Tropical Peat Swamp Soils Using Microbial Diversity and Activity Analysis

The response of the soil microbial food web to extreme rainfall under different plant systems

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