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Zhu M, De Boeck HJ, Xu H, Chen Z, Lv J, Zhang Z. Seasonal variations in the response of soil respiration to rainfall events in a riparian poplar plantation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 747:141222. [PMID: 32795795 DOI: 10.1016/j.scitotenv.2020.141222] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/15/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
Rainfall events have profound influence on the soil carbon release in different forest ecosystems. However, seasonal variations in soil respiration (RS) response to rainfall events and associated regulatory processes are not well documented in riparian forest ecosystems to date. We continuously measured soil respiration in a riparian plantation ecosystem from 2015 to 2018 to explore the relationships between soil respiration and rainfall events. Across the 4 years, 83 individual rainfall events were identified for spring, summer and autumn. We found that mean RS rate after rain (post-RS) was significantly higher than that before rain (pre-RS) (p < 0.05) in spring, and the relative change in soil respiration (RSrc) increased against rainfall size due to the stimulation by the significant increases in soil moisture content (ΔSM). In contrast, mean post-RS was lower than pre-RS and RSrc was significantly decreased with the increasing rainfall size (p < 0.01) in summer and autumn. Reduced changes in soil temperature (ΔTS) and increased soil moisture content after rain (post-SM) contributed to the decreased RS due to frequently occurring heavy rain events in summer. Increased ΔSM following rainfall events coupled with groundwater level increase suppressed RSrc in autumn, even though increased ΔTS could offset the negative effects of SM on RS to some extent. In addition, we found that higher post-SM after large rainfall events (>10 mm day-1) changed the response of RS to soil temperature (TS) by reducing the temperature sensitivity (Q10) even in this riparian plantation ecosystem. Our study highlights the importance of integrating seasonal difference in soil respiration response to rainfall events and the impact of large rainfall events on soil C release for estimating forest soil carbon cycling at multiple scales.
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Affiliation(s)
- Mengxun Zhu
- Key Laboratory of Soil and Water Conservation and Desertification Combating, State Forestry and Grassland Administration, PR China; College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, PR China.
| | - Hans J De Boeck
- Research group PLECO (Plants and Ecosystems), Universiteit Antwerpen, 2610 Wilrijk, Belgium.
| | - Hang Xu
- Key Laboratory of Soil and Water Conservation and Desertification Combating, State Forestry and Grassland Administration, PR China; College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, PR China.
| | - Zuosinan Chen
- Key Laboratory of Soil and Water Conservation and Desertification Combating, State Forestry and Grassland Administration, PR China; College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, PR China.
| | - Jiang Lv
- Gongqing Forest Farm, Beijing Municipal Forestry and Landscape Administration, Beijing 101300, PR China.
| | - Zhiqiang Zhang
- Key Laboratory of Soil and Water Conservation and Desertification Combating, State Forestry and Grassland Administration, PR China; College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, PR China.
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Wu G, Chen XM, Ling J, Li F, Li FY, Peixoto L, Wen Y, Zhou SL. Effects of soil warming and increased precipitation on greenhouse gas fluxes in spring maize seasons in the North China Plain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 734:139269. [PMID: 32450404 DOI: 10.1016/j.scitotenv.2020.139269] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 05/04/2020] [Accepted: 05/05/2020] [Indexed: 05/15/2023]
Abstract
Climatic changes, such as global warming and altered precipitation are of major environmental concern. Given that ecosystem processes are strongly regulated by temperature and water content, climate changes are expected to affect the carbon (C) and nitrogen (N) cycles, especially in agricultural systems. However, the interactive effects of soil warming and increased precipitation on greenhouse gas emissions are poorly understood, particularly in the North China Plain (NCP). Therefore, a field experiment was conducted over two spring maize seasons (May-Sept.) in 2018 and 2019. Two levels of temperature (T0: ambient temperature; T1: increase on average of 4.0 °C) combined with two levels of precipitation (W0: no artificial precipitation; W1: +30% above ambient precipitation) were carried out in the NCP. Our results showed that soil warming significantly promoted cumulative N2O and CO2 emissions by 49% and 39%, respectively. Additionally, increased precipitation further enhanced the N2O and CO2 emissions by 54% and 14%, respectively. This suggests that high soil temperature and water content have the capacity to stimulate microbial activities, and thus accelerate the soil C and N cycles. Soil warming increased CH4 uptake by 293%, but increased precipitation had no effect on CH4 fluxes. Overall, soil warming and increased precipitation significantly enhanced the GHG budget by 39% and 16%, respectively. This study suggests that climate warming will lead to enhanced GHG emissions in the spring maize season in the NCP, while increased precipitation in the future may further stimulate GHG emissions in a warming world.
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Affiliation(s)
- Gong Wu
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Xian-Min Chen
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Jun Ling
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Fang Li
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Feng-Yuan Li
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Leanne Peixoto
- Department of Agroecology, Aarhus University, 8830 Tjele, Denmark
| | - Yuan Wen
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; Scientific Observing and Experimental Station of Crop High Efficient Use of Water in Wuqiao, The Ministry of Agriculture and Rural Affairs, Wuqiao, 061802, China; Innovation Center of Agricultural Technology for Lowland Plain of Hebei, Wuqiao, 061802, China.
| | - Shun-Li Zhou
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; Scientific Observing and Experimental Station of Crop High Efficient Use of Water in Wuqiao, The Ministry of Agriculture and Rural Affairs, Wuqiao, 061802, China; Innovation Center of Agricultural Technology for Lowland Plain of Hebei, Wuqiao, 061802, China.
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Ondier J, Okach DO, John OC, Otieno DO. Influence of rainfall amount and livestock grazing on soil respiration in a moist Kenyan savannah. Afr J Ecol 2019. [DOI: 10.1111/aje.12670] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joseph Ondier
- Department of Botany Maseno University Kisumu Kenya
- Department of Biological Sciences Jaramogi Oginga Odinga University of Science and Technology Bondo Kenya
| | - Daniel O. Okach
- Department of Plant Ecology University of Bayreuth Bayreuth Germany
| | | | - Dennis O. Otieno
- Department of Biological Sciences Jaramogi Oginga Odinga University of Science and Technology Bondo Kenya
- Department of Plant Ecology University of Bayreuth Bayreuth Germany
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Deng Q, Hui D, Chu G, Han X, Zhang Q. Rain-induced changes in soil CO 2 flux and microbial community composition in a tropical forest of China. Sci Rep 2017; 7:5539. [PMID: 28717252 PMCID: PMC5514123 DOI: 10.1038/s41598-017-06345-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 06/13/2017] [Indexed: 11/09/2022] Open
Abstract
Rain-induced soil CO2 pulse, a rapid excitation in soil CO2 flux after rain, is ubiquitously observed in terrestrial ecosystems, yet the underlying mechanisms in tropical forests are still not clear. We conducted a rain simulation experiment to quantify rain-induced changes in soil CO2 flux and microbial community composition in a tropical forest. Soil CO2 flux rapidly increased by ~83% after rains, accompanied by increases in both bacterial (~51%) and fungal (~58%) Phospholipid Fatty Acids (PLFA) biomass. However, soil CO2 flux and microbial community in the plots without litters showed limited response to rains. Direct releases of CO2 from litter layer only accounted for ~19% increases in soil CO2 flux, suggesting that the leaching of dissolved organic carbon (DOC) from litter layer to the topsoil is the major cause of rain-induced soil CO2 pulse. In addition, rain-induced changes in soil CO2 flux and microbial PLFA biomass decreased with increasing rain sizes, but they were positively correlated with litter-leached DOC concentration rather than total DOC flux. Our findings reveal an important role of litter-leached DOC input in regulating rain-induced soil CO2 pulses and microbial community composition, and may have significant implications for CO2 losses from tropical forest soils under future rainfall changes.
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Affiliation(s)
- Qi Deng
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China
- Department of Biological Sciences, Tennessee State University, Nashville, TN, 37209, USA
| | - Dafeng Hui
- Department of Biological Sciences, Tennessee State University, Nashville, TN, 37209, USA.
| | - Guowei Chu
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Xi Han
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China
| | - Quanfa Zhang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China.
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Deng Q, Hui D, Zhang D, Zhou G, Liu J, Liu S, Chu G, Li J. Effects of precipitation increase on soil respiration: a three-year field experiment in subtropical forests in China. PLoS One 2012; 7:e41493. [PMID: 22844484 PMCID: PMC3402392 DOI: 10.1371/journal.pone.0041493] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Accepted: 06/27/2012] [Indexed: 11/18/2022] Open
Abstract
Background The aim of this study was to determine response patterns and mechanisms of soil respiration to precipitation increases in subtropical regions. Methodology/Principal Findings Field plots in three typical forests [i.e. pine forest (PF), broadleaf forest (BF), and pine and broadleaf mixed forest (MF)] in subtropical China were exposed under either Double Precipitation (DP) treatment or Ambient Precipitation (AP). Soil respiration, soil temperature, soil moisture, soil microbial biomass and fine root biomass were measured over three years. We tested whether precipitation treatments influenced the relationship of soil respiration rate (R) with soil temperature (T) and soil moisture (M) using R = (a+cM)exp(bT), where a is a parameter related to basal soil respiration; b and c are parameters related to the soil temperature and moisture sensitivities of soil respiration, respectively. We found that the DP treatment only slightly increased mean annual soil respiration in the PF (15.4%) and did not significantly change soil respiration in the MF and the BF. In the BF, the increase in soil respiration was related to the enhancements of both soil fine root biomass and microbial biomass. The DP treatment did not change model parameters, but increased soil moisture, resulting in a slight increase in soil respiration. In the MF and the BF, the DP treatment decreased soil temperature sensitivity b but increased basal soil respiration a, resulting in no significant change in soil respiration. Conclusion/Significance Our results indicate that precipitation increasing in subtropical regions in China may have limited effects on soil respiration.
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Affiliation(s)
- Qi Deng
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
| | - Dafeng Hui
- Department of Biological Sciences, Tennessee State University, Nashville, Tennessee, United States of America
- * E-mail:
| | - Deqiang Zhang
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Guoyi Zhou
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Juxiu Liu
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Shizhong Liu
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Guowei Chu
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Jiong Li
- South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
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He HS, Shifley SR, Thompson FR. Overview of contemporary issues of forest research and management in China. ENVIRONMENTAL MANAGEMENT 2011; 48:1061-5. [PMID: 22075940 DOI: 10.1007/s00267-011-9782-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Accepted: 10/24/2011] [Indexed: 05/20/2023]
Abstract
With 207 million ha of forest covering 22% of its land area, China ranks fifth in the world in forest area. Rapid economic growth, climate change, and forest disturbances pose new, complex challenges for forest research and management. Progress in meeting these challenges is relevant beyond China, because China's forests represent 34% of Asia's forests and 5% of the worlds' forests. To provide a broader understanding of these management challenges and of research and policies that address them, we organized this special issue on contemporary forest research and management issues in China. At the national level, papers review major forest types and the evolution of sustainable forestry, the development of China's forest-certification efforts, the establishment of a forest inventory system, and achievements and challenges in insect pest control in China. Papers focused on Northern China address historical, social, and political factors that have shaped the region's forests; the use of forest landscape models to assess how forest management can achieve multiple objectives; and analysis and modeling of fuels and fire behavior. Papers addressing Central and South China describe the "Grain for Green" program, which converts low productivity cropland to grassland and woodland to address erosion and soil carbon sequestration; the potential effects of climate change on CO(2) efflux and soil respiration; and relationships between climate and net primary productivity. China shares many forest management and research issues with other countries, but in other cases China's capacity to respond to forest management challenges is unique and bears watching by the rest of the world.
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Affiliation(s)
- Hong S He
- State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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