Short-term effect of Eucalyptus plantations on soil microbial communities and soil-atmosphere methane and nitrous oxide exchange

Cuer, Caroline A.; Rodrigues, Renato de Aragão Ribeiro; Balieiro, Fabiano de Carvalho; Jesus, J. Bastida De; Silva, Elderson P.; Alves, Bruno José Rodrigues; Rachid, Caio T. C. C.

doi:10.1038/s41598-018-33594-6

Cited by 25 publications

(10 citation statements)

References 54 publications

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“…The denitrifying gene markers tracked changes in N 2 O fluxes in some but not all cases, and their poor prediction of N 2 O dynamics may indicate that other microbial N cycling processes were also important (Martins et al, 2015). Increased N 2 O fluxes in the wet season in the field and incubation experiments were accompanied by increasing nirK gene abundances in the soil from all sampling sites.…”

Section: Discussionmentioning

confidence: 95%

Differences in N2O Fluxes and Denitrification Gene Abundance in the Wet and Dry Seasons Through Soil and Plant Residue Characteristics of Tropical Tree Crops

Nishisaka

Youngerman

Meredith

et al. 2019

Front. Environ. Sci.

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The conversion of forest to agricultural soils is a widespread activity in tropical systems, and its link to nitrous oxide (N 2 O) fluxes and nitrogen cycling gene abundance is relevant to understand environmental drivers that may interact with climate change. A current challenge to estimating N 2 O emissions from land use conversion is an incomplete understanding of crop-specific impacts on denitrifier communities and the N 2 O fluxes driven by differences in the above-and below-ground inputs with crop type. To address this knowledge gap in tree crops, we evaluated N 2 O fluxes and denitrification gene abundance and their relationships with soil and plant residue characteristics in citrus and eucalyptus plantations in the field and in soil incubations. We found that the accumulated N 2 O fluxes from soil were lower for the two agricultural field sites than those for their adjacent forest sites in dry and wet seasons. The N 2 O fluxes were higher in the wet season, and this seasonal difference persisted even when the soils collected from both seasons were incubated under the same moisture and temperature conditions in the lab for 30 days. Increased N 2 O fluxes in the wet season were accompanied by an increase in soil nirK and nosZ gene abundance, the dissolved organic carbon (DOC) concentration, and the total soil carbon (C) and nitrogen (N) content. In turn, the abundance of denitrifiers, as indicated by nirK, nirS, and nosZ gene copy numbers, showed a low but significant positive correlation with soil bulk density. Our results suggest that soil moisture, leaf litter, and crop residues influence the seasonal differences in both N 2 O fluxes and abundance of denitrifiers in citrus-and eucalyptus-cultivated soils, likely through effects on soil physicochemical characteristics. These findings highlight the overwhelming role of environmental drivers that can make investigating microbial drivers difficult in the field and open the possibility for a better understanding of N cycling processes in tropical soils based on paired field-and incubation-based experimentation.

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Section: Discussionmentioning

confidence: 95%

Differences in N2O Fluxes and Denitrification Gene Abundance in the Wet and Dry Seasons Through Soil and Plant Residue Characteristics of Tropical Tree Crops

Nishisaka

Youngerman

Meredith

et al. 2019

Front. Environ. Sci.

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“…In addition to having overall significant effects, these responses were also remarkably universal across studies (Figure 3). Only two studies reported any changes in abundance that were opposite to the summary effect; Firmicutes were reported to decrease in Cuer et al (2018), and Schneider et al (2015) reported a decrease in Actinobacteria and increase in Acidobacteria with conversion (Figure 4).…”

Section: Compositionmentioning

confidence: 97%

Meta-Analysis Reveals Consistent Bacterial Responses to Land Use Change Across the Tropics

2019

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Bacterial communities are a major component of global diversity and are intimately involved in most terrestrial biogeochemical processes. Despite their importance, we know far less about the response of bacteria to human-induced environmental change than we do about other organisms. Understanding the response of organisms to land use change is especially pressing for tropical rainforests, which are being altered at a higher rate than any other ecosystem. Here, we conduct a meta-analysis of studies performed in each of the major tropical rainforest regions to ask whether there are consistent responses of belowground bacterial communities to the conversion of tropical rainforest to agriculture. Remarkably, we find common responses despite wide variation across studies in the types of agriculture practiced and the research methodology used to study land use change. These responses include changes in the relative abundance of phyla, most notably decreases in Acidobacteria [−1.94 ± 1.1 fold (average ± 95% CI)] and Proteobacteria (−1.38 ± 1.0 fold) and increases in Actinobacteria (1.55 ± 1.1 fold), Chloroflexi (3.47 ± 1.2 fold), and Firmicutes (6.6 ± 1.3 fold). We also find that alpha diversity (at the scale of single soil cores) consistently increases (1.17 ± 1.0 fold) with ecosystem conversion. These consistent responses suggest that, while there is great diversity in agricultural practices across the tropics, common features such as the use of slash-and-burn tactics have the potential to alter bacterial community composition and diversity belowground.

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“…Conversion from a primary evergreen broadleaf forest to a Eucalyptus urophylla plantation resulted in a decrease in microbial biomass C, urease, invertase, and acid phosphatase (ACP) activities in 5‐year‐old stands, but an increase for 10‐year‐old stands (Zhu et al, 2019). Bacterial richness increased following forest conversion in tropical regions (Lan et al, 2018; Nakayama et al, 2019), but decreased in temperate regions (Cuer et al, 2018; Xia et al, 2015). These mixed results among field studies have led to substantial uncertainty when predicting the consequences of natural forests conversion to plantations.…”

Section: Introductionmentioning

confidence: 99%

Forest conversion to plantations: A meta‐analysis of consequences for soil and microbial properties and functions

Wang

Chen

Xiang

et al. 2021

Global Change Biology

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Short-term effect of Eucalyptus plantations on soil microbial communities and soil-atmosphere methane and nitrous oxide exchange

Cited by 25 publications

References 54 publications

Differences in N2O Fluxes and Denitrification Gene Abundance in the Wet and Dry Seasons Through Soil and Plant Residue Characteristics of Tropical Tree Crops

Differences in N2O Fluxes and Denitrification Gene Abundance in the Wet and Dry Seasons Through Soil and Plant Residue Characteristics of Tropical Tree Crops

Meta-Analysis Reveals Consistent Bacterial Responses to Land Use Change Across the Tropics

Forest conversion to plantations: A meta‐analysis of consequences for soil and microbial properties and functions

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