Soil Bacterial Diversity Impacted by Conversion of Secondary Forest to Rubber or Eucalyptus Plantations: A Case Study of Hainan Island, South China

Lan, Guoyu; Li, Yuwu; Wu, Zhixiang; Xie, Guishui

doi:10.5849/forsci.16-012

Cited by 30 publications

(43 citation statements)

References 27 publications

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“…pH has been identified as an important variable in determining microbial diversity patterns on a number of scales (Fierer & Jackson, 2006) and is a factor in determining plantation soil community composition . Nutrient concentration (P, N) is also generally a major driver of microbial diversity patterns (Leff et al, 2015) including in forest habitats (Liu et al, 2012) and Eucalyptus plantations (Lan et al, 2017) and our results are consistent with this.…”

Section: Community Diversity Patternssupporting

confidence: 91%

“…Conversely, soil bacterial and fungal communities have been shown to be affected by Eucalyptus plantations using PLFA (phospholipid fatty acid) analysis since the community structure was impacted significantly with the variation of planting age (Chen et al, 2013;Cao et al, 2010;Wu et al, 2013). This is contradictory to other studies reported which demonstrate that Eucalyptus plantations reduced microbial biomass, soil organic carbon and nitrogen concentrations during continuous planting (Behera & Sahani, 2003;Cortez et al, 2014).Another relevant study of secondary tropical forest (SF) converted into Eucalyptus plantations (EP) using high-throughput sequencing techniques revealed a significant difference between SF and EP samples in bacterial composition and diversity (Lan et al, 2017). Given that these tools can elucidate the impact of artificial planting, especially on the surrounding soil ecosystem affected by the functioning of microbial communities if impacted (Zhang et al, 2017;Zheng et al, 2017;Lin et al, 2017), their application will better define the response of soil microbial community diversity and function to land use shift and long-term Eucalyptus plantation, which remains obscure.…”

Section: Introductionmentioning

confidence: 80%

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Peer Review #2 of "Variation of soil bacterial communities along a chronosequence of Eucalyptus plantation (v0.1)"

2018

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Eucalyptus is harvested for wood and fiber production in many tropical and subtropical habitats globally. Plantation has been controversial because of its influence on the surrounding environment however the influence of massive Eucalyptus planting on soil microbial communities is unclear. Here we applied high-throughput sequencing of the 16S rRNA gene to assess the microbial community composition and diversity of planting chronosequences, involving two, five and ten years of Eucalyptus plantation, comparing to that of secondary-forest in South China. We found that significant changes in the composition of soil bacteria occurred when the forests were converted from secondaryforest to Eucalyptus. The bacterial community structure was clearly distinct from control and five year samples after Eucalyptus was grown for two and ten years, highlighting the influence of this plantation on local soil microbial communities. These groupings indicated a cycle of impact (two-and ten-year plantations) and low impact (five-year plantations) in this chronosequence of Eucalyptus plantation. Community patterns were underpinned by shifts in soil properties such as pH and phosphorus concentration. Concurrently, key soil taxonomic groups such as Actinobacteria showed abundance shifts, increasing in impacted plantations and decreasing in low impacted samples. Shifts in taxonomy were reflected in a shift in metabolic potential, including pathways for nutrient cycles such as carbon fixation, which changed in abundance over time following Eucalyptus plantation. Combined these results confirm that Eucalyptus plantation can change the community structure and diversity of soil microorganisms with strong implications for land-management and maintaining the health of these ecosystems.

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Section: Community Diversity Patternssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 80%

Peer Review #2 of "Variation of soil bacterial communities along a chronosequence of Eucalyptus plantation (v0.1)"

2018

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“…The composition of microbial communities in soil is tightly connected with soil characteristics and nutrient availability. These parameters are in turn connected with land use and management practices [36][37][38][39]. In order to investigate the impact of soil attributes on soilborne communities with respect to rainforest conversion, we employed nonparametric multidimensional scaling (NMDS) on Bray Curtis dissimilarity matrices ( Fig.…”

Section: Influence Of Abiotic Parameters On Soilborne Communitiesmentioning

confidence: 99%

Unravelling the effects of tropical land use conversion on the soil microbiome

Hölscher

Schneider

Meryandini

et al. 2020

Environmental Microbiome

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Background: The consequences of deforestation and agricultural treatments are complex and affect all trophic levels. Changes of microbial community structure and composition associated with rainforest conversion to managed systems such as rubber and oil palm plantations have been shown by 16S rRNA gene analysis previously, but functional profile shifts have been rarely addressed. In this study, we analysed the effects of rainforest conversion to different converted land use systems, including agroforestry ("jungle rubber") and monoculture plantations comprising rubber and oil palm, on soilborne microbial communities by metagenomic shotgun sequencing in Sumatra, Indonesia.Results: The diversity of bacteria and archaea decreased whereas diversity of fungi increased in the converted land use systems. The soil microbiome was dominated by bacteria followed by fungi. We detected negative effects of land use conversion on the abundance of Proteobacteria (especially on Rhizobiales and Burkholderiales) and positive effects on the abundance of Acidobacteria and Actinobacteria. These abundance changes were mainly driven by pH, C:N ratio, and Fe, C and N content. With increasing land use intensity, the functional diversity decreased for bacteria, archaea and fungi. Gene abundances of specific metabolisms such as nitrogen metabolism and carbon fixation were affected by land use management practices. The abundance of genes related to denitrification and nitrogen fixation increased in plantations while abundance of genes involved in nitrification and methane oxidation showed no significant difference. Linking taxonomic and functional assignment per read indicated that nitrogen metabolism-related genes were mostly assigned to members of the Rhizobiales and Burkholderiales. Abundances of carbon fixation genes increased also with increasing land use intensity. Motility-and interaction-related genes, especially genes involved in flagellar assembly and chemotaxis genes, decreased towards managed land use systems. This indicated a shift in mobility and interspecific interactions in bacterial communities within these soils. Conclusions: Rainforest conversion to managed land use systems drastically affects structure and functional potential of soil microbial communities. The decrease in motility-and interaction-related functions from rainforest to converted land use systems indicated not only a shift in nutrient cycling but also in community dynamics. Fertilizer application and correspondingly higher availability of nutrients in intensively managed plantations lead to an environment in which interspecific interactions are not favoured compared to rainforest soils. We could directly link effects of land management, microbial community structure and functional potential for several metabolic processes. As our study is the first study of this size and detail on soil microbial communities in tropical systems, we provide a basis for further analyses.

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“…Furthermore, Rodrigues et al (2013) have revealed that local taxonomic and phylogenetic diversity of soil bacteria increases after conversion, but the communities become more similar across space. The main reason for high diversity of bacterial communities in RP maybe the results of agricultural management, such as the application of fertilizers, which would result in high diversity of soil bacteria (Kerfahi et al, 2016;Lan, Li, et al, 2017).…”

Section: Microbial Diversitymentioning

confidence: 99%

“…In our study, soil nutrients and soil pH increased after forest conversion (Table1). Beside this, Lan, Li, et al (2017) have examined that soil nutrition (TN, TP, and TK), which explained 43.05% of the total variance of bacterial taxonomic composition, was one of the most important factors affecting the soil bacterial community structures in Hainan Island, south of China. In this study, the TN, TK, and total TP of soils in RF were significantly higher than in TSF and TSR (Table 1).…”

Section: Taxonomic Compositionsmentioning

confidence: 99%

Change in Soil Microbial Community Compositions and Diversity Following the Conversion of Tropical Forest to Rubber Plantations in Xishuangbanan, Southwest China

Lan

Jatoi

et al. 2017

Tropical Conservation Science

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The ecological consequences of converting tropical forests to rubber plantations on the soil microbial compositions and diversity remain unknown. By using an Illumina MiSeq sequencing analysis, we assessed the compositions and diversity of bacterial and fungal community in soils of rubber plantation (or rubber forest, RF), secondary tropical forest (STF), and tropical seasonal rainforest (TSR) in Xishuangbanna, southwest China. Our findings revealed that (a) for bacterial composition, Bacillaceae was the most dominant family (13.60%) in RF soil, while it only accounted for 4.13% in STF and 6.92% in TSR. For fungal composition, the largest family in soils of RF was Basidiomycota_unclassified. However, the largest family in STF and TSR was Russulaceae. (b) Number of operational taxonomic units, Chao index, and Shannon index of bacterial community in soil of RF were significantly higher than those of TSR and STF. However, these diversity indices of fungal community in RF were significantly lower than those of TSR and STF. (c) Soil pH and total phosphorus were very important drivers for bacterial community, whereas soil organic matter and total nitrogen were the most important factors for fungal community. (d) The microbial biomass carbon in RF was relative lower than those in STF and TSR, which suggested that the total microbial biomass decreased after forest conversion. To protect the total diversity of this region, the individual farmers should use herbicides as little as possible to reserve ground vegetation. And the government could outline a land-use policy that prohibits the cultivation in areas of natural vegetation.

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Soil Bacterial Diversity Impacted by Conversion of Secondary Forest to Rubber or Eucalyptus Plantations: A Case Study of Hainan Island, South China

Cited by 30 publications

References 27 publications

Peer Review #2 of "Variation of soil bacterial communities along a chronosequence of Eucalyptus plantation (v0.1)"

Peer Review #2 of "Variation of soil bacterial communities along a chronosequence of Eucalyptus plantation (v0.1)"

Unravelling the effects of tropical land use conversion on the soil microbiome

Change in Soil Microbial Community Compositions and Diversity Following the Conversion of Tropical Forest to Rubber Plantations in Xishuangbanan, Southwest China

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