The legacy of mixed planting and precipitation reduction treatments on soil microbial activity, biomass and community composition in a young tree plantation

Hicks, Lettice C.; Rahman, Masudur; Carnol, Monique; Verheyen, Kris; Rousk, Johannes

doi:10.1016/j.soilbio.2018.05.027

Cited by 41 publications

(32 citation statements)

References 54 publications

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“…On the other hand, to our knowledge, our study is among the first to address this question for well-established (>30 years old) natural forest communities. A study on a 7-year old planted experimental forest in Belgium with a one to four tree species richness gradient also did not find a significant tree mixing effect on microbial respiration in response to DRW 42 , while another study in the same forest found that species mixing could influence microbial community composition through changes in fungal-to-bacterial growth 43 .…”

Section: Discussionmentioning

confidence: 91%

Higher tree diversity increases soil microbial resistance to drought

et al. 2020

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Predicted increases in drought frequency and severity may change soil microbial functioning. Microbial resistance and recovery to drought depend on plant community characteristics, among other factors, yet how changes in plant diversity modify microbial drought responses is uncertain. Here, we assessed how repeated drying-rewetting cycles affect soil microbial functioning and whether tree species diversity modifies these effects with a microcosm experiment using soils from different European forests. Our results show that microbial aerobic respiration and denitrification decline under drought but are similar in single and mixed tree species forests. However, microbial communities from mixed forests resist drought better than those from mono-specific forests. This positive tree species mixture effect is robust across forests differing in environmental conditions and species composition. Our data show that mixed forests mitigate drought effects on soil microbial processes, suggesting greater stability of biogeochemical cycling in mixed forests should drought frequency increase in the future.

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Section: Discussionmentioning

confidence: 91%

Higher tree diversity increases soil microbial resistance to drought

et al. 2020

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“…The lack of change in the ratio of fungal to bacterial gene copy numbers in both soils implies a stable microbial composition in response to C addition (Table 5). Although these data imply that more microorganisms were involved with degrading the added C substrate, shifts in composition within the bacterial and fungal lineages cannot be ruled out with this approach and would require further studies using geochemical biomarkers such as phospholipid fatty acids (PLFAs), ergosterol and amino sugars, and sequence-based methods (Dippold et al, 2019;Hicks, Rahman, Carnol, Verheyen, & Rousk, 2018;Schlatter, Bakker, Bradeen, & Kinkel, 2015).…”

Section: Discussionmentioning

confidence: 99%

Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study

Hui

Porter

Phillips

et al. 2020

European J Soil Science

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Ecosystem functional responses such as soil CO 2 emissions are constrained by microclimate, available carbon (C) substrates and their effects upon microbial activity. In tropical forests, phosphorus (P) is often considered as a limiting factor for plant growth, but it is still not clear whether P constrains microbial CO 2 emissions from soils. In this study, we incubated seven tropical forest soils from Brazil and Puerto Rico with different nutrient addition treatments (no addition, Control; C, nitrogen (N) or P addition only; and combined C, N and P addition (CNP)). Cumulative soil CO 2 emissions were fit with a Gompertz model to estimate potential maximum cumulative soil CO 2 emission (C m ) and the rate of change of soil C decomposition (k). Quantitative polymerase chain reaction (qPCR) was conducted to quantify microbial biomass as bacteria and fungi. Results showed that P addition alone or in combination with C and N enhanced C m , whereas N addition usually reduced C m , and neither N nor P affected microbial biomass. Additions of CNP enhanced k, increased microbial abundances and altered fungal to bacterial ratios towards higher fungal abundance. Additions of CNP, however, tended to reduce C m for most soils when compared to C additions alone, suggesting that microbial growth associated with nutrient additions may have occurred at the expense of C decomposition. Overall, this study demonstrates that soil CO 2 emission is more limited by P than N in tropical forest soils and those effects were stronger in soils low in P. Highlights• A laboratory incubation study was conducted with nitrogen, phosphorus or carbon addition to tropical forest soils. Soil CO 2 emission was fitted with a Gompertz model and soil microbial abundance was quantified using qPCR. Phosphorus addition increased model parameters C m and soil CO 2 emission, particularly in the Puerto Rico soils. Soil CO 2 emission was more limited by phosphorus than nitrogen in tropical forest soils.

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“…SOM and soil inorganic carbon (SIC) were measured using a loss on ignition (LOI) procedure according to Wang et al (2011). The maximum amount of water that soils could hold after gravity loss was measured to determine the water holding capacity (WHC) of soils as described in Hicks et al (2018).…”

Section: Soil and Microbial Community Characterizationmentioning

confidence: 99%

Drought legacy affects microbial community trait distributions related to moisture along a savannah grassland precipitation gradient

et al. 2020

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The legacy of mixed planting and precipitation reduction treatments on soil microbial activity, biomass and community composition in a young tree plantation

Cited by 41 publications

References 54 publications

Higher tree diversity increases soil microbial resistance to drought

Higher tree diversity increases soil microbial resistance to drought

Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study

Drought legacy affects microbial community trait distributions related to moisture along a savannah grassland precipitation gradient

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The legacy of mixed planting and precipitation reduction treatments on soil microbial activity, biomass and community composition in a young tree plantation

Cited by 41 publications

References 54 publications

Higher tree diversity increases soil microbial resistance to drought

Higher tree diversity increases soil microbial resistance to drought

Phosphorus rather than nitrogen enhances CO2 emissions in tropical forest soils: Evidence from a laboratory incubation study

Drought legacy affects microbial community trait distributions related to moisture along a savannah grassland precipitation gradient

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Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study