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Biological indicators affected by land use change, soil resource availability and seasonality in dry tropics
Singh, Ashutosh Kumar2; Jiang, Xiao-Jin; Yang, Bin1; Wu, Junen1; Rai, Apurva2; Chen, Chunfeng1; Ahirwal, Jitendra3; Wang, Pingyuan1; Liu, Wenjie1; Singh, Nandita2
2020
Source PublicationECOLOGICAL INDICATORS
ISSN1470-160X
Volume115Pages:-
AbstractLand use change (LUC) in tropics, explicitly from forest to conventional agriculture, is negatively affecting soil health and productivity. However, effect of such LUC on soil biological properties are poorly known in dry tropical environment. This study aimed to determine the impact of such LUC and climate seasonality on soil biological properties (microbial and enzyme activities), and to also explore the role of soil resources (C, N and P) in driving soil biological properties during this environmental change. Soil biological indicators of topsoil (0-15 cm) were measured on a seasonal basis in the natural forest, fallow and agricultural land. Soil microbial biomass C (C-mic), CO2 efflux (C-efflux) and hydrolytic enzyme activities (acid phosphatase, alkaline phosphatase, beta-glucosidase, dehydrogenase, fluorescein diacetate) were generally higher in the forest followed agriculture and fallow. The lower level of these biological variables in agriculture soils were possibly due to lower total soil organic carbon (SOC), labile SOC (particulate OC; POC), total N and P, and cropping disturbance (i.e., fertilization) induced higher inorganic N and P. Whereas, lower biological activities in fallow soils were mainly attributed lower plant activity (i.e. litter production and root activity). In contrast, oxidative enzyme (particularly peroxidase) activities were higher in agriculture followed by the forest and fallow, which might be attributed to higher soil oxygenation from tillage in agriculture and higher persistent SOC (non-particulate OC; NPOC). Seasonal variation in soil biological properties was identical among land uses, though its extent was greater in the forest than fallow and agriculture, indicating LUC can alter the degree of seasonality in biological properties. In addition, the higher specific enzyme activities (i.e., enzyme activities per unit of C-mic) and microbial metabolic quotient (qCO(2)) in the fallow followed by agriculture and forest, indicating the higher degree of stress on soil microbes after the deforestation than cropping. Whereas, the higher specific enzyme activities and qCO(2) in agriculture possibly attributed to higher microbial nutrients demand and lower SOC accumulation. Collectively, our results reveal the significant effects of deforestation and agriculture on soil biological activities and improve our understanding of the potential mechanism driving these effects.
KeywordDeforestation Soil organic carbon Hydrolytic enzymes Oxidative enzymes Tropical dry forest Microbial activity Microbial biomass carbon
Subject AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
DOI10.1016/j.ecolind.2020.106369
Indexed BySCI
Language英语
WOS IDWOS:000560052500012
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11787
Collection2012年后新成立研究组
Affiliation1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, CAS Key Lab Trop Forest Ecol, Menglun 666303, Yunnan, Peoples R China
2.Chinese Acad Sci, Core Bot Gardens, Ctr Plant Ecol, Menglun 666303, Yunnan, Peoples R China
3.CSIR Natl Bot Res Inst, Plant Ecol & Environm Sci Div, Lucknow 226001, Uttar Pradesh, India
4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
Recommended Citation
GB/T 7714
Singh, Ashutosh Kumar,Jiang, Xiao-Jin,Yang, Bin,et al. Biological indicators affected by land use change, soil resource availability and seasonality in dry tropics[J]. ECOLOGICAL INDICATORS,2020,115:-.
APA Singh, Ashutosh Kumar.,Jiang, Xiao-Jin.,Yang, Bin.,Wu, Junen.,Rai, Apurva.,...&Singh, Nandita.(2020).Biological indicators affected by land use change, soil resource availability and seasonality in dry tropics.ECOLOGICAL INDICATORS,115,-.
MLA Singh, Ashutosh Kumar,et al."Biological indicators affected by land use change, soil resource availability and seasonality in dry tropics".ECOLOGICAL INDICATORS 115(2020):-.
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