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Coastal wetlands provide essential ecosystem services and are closely related to human welfare. However, they can experience substantial degradation, especially in regions in which there is intense human activity. To control these increasingly severe problems and to develop corresponding management policies in coastal wetlands, it is critical to accurately map coastal wetlands. Although remote sensing is the most efficient way to monitor coastal wetlands at a regional scale, it traditionally involves a large amount of work, high cost, and low spatial resolution when mapping coastal wetlands at a large scale. In this study, we developed a workflow for rapidly mapping coastal wetlands at a 10 m spatial resolution, based on the recently emergent Google Earth Engine platform, using a machine learning algorithm, open-access Synthetic Aperture Radar (SAR) and optical images from the Sentinel satellites, and two terrain indices. We then generated a coastal wetland map of the Bohai Rim (BRCW10) based on the workflow. It has a producer accuracy of 82.7%, according to validation using 150 wetland samples. The BRCW10 data reflected finer information when compared to wetland maps derived from two sets of global high-spatial-resolution land cover data, due to the fusion of multiple data sources. The study highlights the benefits of simultaneously merging SAR and optical remote sensing images when mapping coastal wetlands.
Shaobo Sun; Yonggen Zhang; Zhaoliang Song; Baozhang Chen; Yangjian Zhang; Wenping Yuan; Chu Chen; Wei Chen; Xiangbin Ran; Yidong Wang. Mapping Coastal Wetlands of the Bohai Rim at a Spatial Resolution of 10 m Using Multiple Open-Access Satellite Data and Terrain Indices. Remote Sensing 2020, 12, 4114 .
AMA StyleShaobo Sun, Yonggen Zhang, Zhaoliang Song, Baozhang Chen, Yangjian Zhang, Wenping Yuan, Chu Chen, Wei Chen, Xiangbin Ran, Yidong Wang. Mapping Coastal Wetlands of the Bohai Rim at a Spatial Resolution of 10 m Using Multiple Open-Access Satellite Data and Terrain Indices. Remote Sensing. 2020; 12 (24):4114.
Chicago/Turabian StyleShaobo Sun; Yonggen Zhang; Zhaoliang Song; Baozhang Chen; Yangjian Zhang; Wenping Yuan; Chu Chen; Wei Chen; Xiangbin Ran; Yidong Wang. 2020. "Mapping Coastal Wetlands of the Bohai Rim at a Spatial Resolution of 10 m Using Multiple Open-Access Satellite Data and Terrain Indices." Remote Sensing 12, no. 24: 4114.
Nano and microplastics (NPs/MPs) have received widespread attention in recent years. Because of their large specific surface area and hydrophobicity, NPs/MPs can adsorb various organic contaminants. This article gives a brief review of the sorption behavior of organic contaminants to NPs/MPs, summarizes the possible sorption mechanisms, and analyzes the influencing factors in the environment on the sorption behavior and mechanisms of NPs/MPs. The main mechanisms of sorption of organic contaminants to NPs/MPs are partitioning, surface sorption (hydrogen bonding, π–π interaction, electrostatic interaction, and van der Waals force), and pore filling. The sorption behavior of organic contaminants to NPs/MPs is not only affected by the properties of the NPs/MPs and the organic contaminants, but also by the solution chemistry, such as the pH, ionic strength, and dissolved organic matter.
Fang Wang; Min Zhang; Wei Sha; Yidong Wang; Huizhi Hao; Yuanyuan Dou; Yao Li. Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics. Molecules 2020, 25, 1827 .
AMA StyleFang Wang, Min Zhang, Wei Sha, Yidong Wang, Huizhi Hao, Yuanyuan Dou, Yao Li. Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics. Molecules. 2020; 25 (8):1827.
Chicago/Turabian StyleFang Wang; Min Zhang; Wei Sha; Yidong Wang; Huizhi Hao; Yuanyuan Dou; Yao Li. 2020. "Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics." Molecules 25, no. 8: 1827.
Soil microorganisms are considered to be important indicators of soil fertility and soil quality. Most previous studies have focused solely on surface soil, but there were numerous active cells in deeper soil layers. However, studies regarding microbial communities in deeper soil layers were not comprehensive and sufficient. In this study, phylogenetic molecular ecological networks (pMENs) based on the 16S rRNA Miseq sequencing technique were applied to study the response of soil microbial communities to depth gradients and the changes of key genera along 3 meter depth gradients (0–0.2 m, 0.2–0.4 m 0.4–0.6 m, 0.6–0.8 m, 0.8–1.0 m, 1.0–1.3 m, 1.3–1.6 m, 1.6–2.0 m, 2.0–2.5 m, and 2.5–3.0 m). The results showed that the modularity of microbial communities was consistently high in all soil layers and each layer was similar, which indicated that microbial communities were more resistant to depth changes. The pMENs further demonstrated that microbial community interactions were stable as the depth increased and they cooperated well to adapt to changes in different soil gradients. This was evidenced by similar positive links, average degree, and average clustering coefficient. In addition, key genera were obtained by analyzing module hubs in the pMENs. There may be at least one dominant genus in each layer that adapted to and resisted changes in the soil environment. It seems microbial communities demonstrate a stable and strong adaptability to depth gradients in farmland soils.
Hang Yu; Dongmei Xue; Yidong Wang; Wei Zheng; Guilong Zhang; Zhong‐Liang Wang. Molecular ecological network analysis of the response of soil microbial communities to depth gradients in farmland soils. MicrobiologyOpen 2020, 9, e983 .
AMA StyleHang Yu, Dongmei Xue, Yidong Wang, Wei Zheng, Guilong Zhang, Zhong‐Liang Wang. Molecular ecological network analysis of the response of soil microbial communities to depth gradients in farmland soils. MicrobiologyOpen. 2020; 9 (3):e983.
Chicago/Turabian StyleHang Yu; Dongmei Xue; Yidong Wang; Wei Zheng; Guilong Zhang; Zhong‐Liang Wang. 2020. "Molecular ecological network analysis of the response of soil microbial communities to depth gradients in farmland soils." MicrobiologyOpen 9, no. 3: e983.
Over the past century, conversion to agriculture has greatly reduced the global extent of coastal wetlands leading to degradation and loss of these ecosystems. However, it remains unclear how this land conversion affects the confluent soil organic and inorganic carbon (SOC and SIC) storage as well as their localizations in soil matrix. Here, we investigated these issues using wet sieving at two coastal saline‐alkali sites in northern China. Conversion of marshes to cropland (> 60 years) decreased the portion of large macroaggregates (> 2 mm) and correspondingly increased the portion of microaggregates (0.053−0.25 mm) at both sites. Land conversion decreased SOC contents by 31−67% in all fractions (> 2, 0.25−2, 0.053−0.25 and < 0.053 mm) in the top‐ (0−15 cm) and sub‐soil (15−30 cm). In contrast, irrigation‐ and NH4HCO3 fertilization‐derived carbonates increased SIC storages in almost all fractions due to the saline‐alkali soil conditions, especially for the subsoil. This increases in SIC almost offset and compensate for the SOC losses at both sites. Consequently, the irrigation‐ and NH4HCO3‐induced SIC accumulation should be included in the full C balance of saline‐alkali soils. It should be noted, however, that the progressive loss of SOC due to cultivation will lead to soil degradation in fertility and ecological function, thereby hampering long‐term sustainability of coastal ecosystems. Therefore, the compensation of SIC for the loss of SOC is not sustainable in the longer term. This article is protected by copyright. All rights reserved.
Yuanshan Zhu; Yidong Wang; Changcheng Guo; Dongmei Xue; Jun Li; Qing Chen; Zhaoliang Song; Yilai Lou; Yakov Kuzyakov; Zhong‐Liang Wang; Davey L. Jones. Conversion of coastal marshes to croplands decreases organic carbon but increases inorganic carbon in saline soils. Land Degradation & Development 2020, 31, 1099 -1109.
AMA StyleYuanshan Zhu, Yidong Wang, Changcheng Guo, Dongmei Xue, Jun Li, Qing Chen, Zhaoliang Song, Yilai Lou, Yakov Kuzyakov, Zhong‐Liang Wang, Davey L. Jones. Conversion of coastal marshes to croplands decreases organic carbon but increases inorganic carbon in saline soils. Land Degradation & Development. 2020; 31 (9):1099-1109.
Chicago/Turabian StyleYuanshan Zhu; Yidong Wang; Changcheng Guo; Dongmei Xue; Jun Li; Qing Chen; Zhaoliang Song; Yilai Lou; Yakov Kuzyakov; Zhong‐Liang Wang; Davey L. Jones. 2020. "Conversion of coastal marshes to croplands decreases organic carbon but increases inorganic carbon in saline soils." Land Degradation & Development 31, no. 9: 1099-1109.
Livestock and poultry farming sectors are among the largest anthropogenic methane (CH4) emission sources, mainly from enteric fermentation and manure management. Previous inventories of CH4 emission were generally based on constant emission factor (EF) per head, which had some weaknesses mainly due to the succession of breeding and feeding systems over decades. Here, more reliable long-term changes of CH4 emissions from livestock and poultry farming in Beijing are estimated using the dynamic EFs based on the Intergovernmental Panel on Climate Change (IPCC) Tier 2 method, and high-resolution spatial patterns of CH4 emissions are also estimated with intensive field survey. The results showed that the estimated CH4 emissions derived by dynamic EFs were approximately 13–19% lower than those based on the constant EF before 2010. After 2011, however, the dynamic EFs-derived CH4 emissions were a little higher (3%) than the constant EF method. Temporal CH4 emissions in Beijing had experienced four developing stages (1978–1988: stable; 1989–1998: slow growth; 1999–2004: rapid growth and reached hot moments; 2005–2014: decline) during 1978–2014. Over the first two decades, the contributions of pigs (45%) and cattle (46%) to annual CH4 emission were similar; subsequently, the cattle emitted more CH4 compared to the pigs. At a spatial scale, Shunyi, Daxing, and Tongzhou districts with more cattle and pigs are the hotspots of CH4 emission. In conclusion, the dynamic EFs method obviously improved the spatio-temporal estimates of CH4 emissions compared to the constant EF approach, and the improvements depended on the period and aquaculture structure. Therefore, the dynamic EFs method should be recommended for estimating CH4 emissions from livestock and poultry farming in the future.
Yixuan Guo; Yidong Wang; Shufeng Chen; Shunan Zheng; Changcheng Guo; Dongmei Xue; Yakov Kuzyakov; Zhong-Liang Wang. Inventory of Spatio-Temporal Methane Emissions from Livestock and Poultry Farming in Beijing. Sustainability 2019, 11, 3858 .
AMA StyleYixuan Guo, Yidong Wang, Shufeng Chen, Shunan Zheng, Changcheng Guo, Dongmei Xue, Yakov Kuzyakov, Zhong-Liang Wang. Inventory of Spatio-Temporal Methane Emissions from Livestock and Poultry Farming in Beijing. Sustainability. 2019; 11 (14):3858.
Chicago/Turabian StyleYixuan Guo; Yidong Wang; Shufeng Chen; Shunan Zheng; Changcheng Guo; Dongmei Xue; Yakov Kuzyakov; Zhong-Liang Wang. 2019. "Inventory of Spatio-Temporal Methane Emissions from Livestock and Poultry Farming in Beijing." Sustainability 11, no. 14: 3858.
Long-term nitrogen (N) fertilization affects soil aggregation and localizations of soil organic carbon (SOC), N and microbial parameters within aggregates. The mechanisms of these N effects are poorly understood. We studied these processes in a loamy soil from a 23-year repeated N addition field experiment under a rice–barley rotation. Nitrogen fertilization increased plant productivity and the portion of large macroaggregates (> 2 mm). However, SOC contents in macro- and micro-aggregates remained constant despite an N-induced increase of 27% in root C input into soil. Therefore, N fertilization accelerated SOC turnover. Nitrogen addition increased total N (TN) content in bulk soil and two macroaggregates (> 2, and 1–2 mm), but not in microaggregates (< 0.25 mm). Also, N fertilization increased the phospholipid fatty acids (PLFAs) contents of fungi in the large macroaggregates, but not in the microaggregates. In contrast, the effect of N addition on contents of bacterial and total microbial PLFAs was not apparent. Nitrogen fertilization increased N-acetyl-β-D-glucosaminidase (NAG) activities in the two larger macroaggregate size classes (> 2, and 1–2 mm), but not in the aggregates (< 1 mm). In both control and N fertilization, the large macroaggregates localized more TN, microbial PLFAs, and NAG activities than the microaggregates. In conclusion, long-term N fertilization not only directly promotes soil N resource but also indirectly improves soil structure by forming large macroaggregates, accelerates SOC turnover, and shiftes localization of microorganisms to the macroaggregates.
Yidong Wang; Zhong-Liang Wang; Qingzhong Zhang; Ning Hu; Zhongfang Li; Yilai Lou; Yong Li; Dongmei Xue; Yi Chen; Chunyan Wu; Chris B. Zou; Yakov Kuzyakov. Long-term effects of nitrogen fertilization on aggregation and localization of carbon, nitrogen and microbial activities in soil. Science of The Total Environment 2017, 624, 1131 -1139.
AMA StyleYidong Wang, Zhong-Liang Wang, Qingzhong Zhang, Ning Hu, Zhongfang Li, Yilai Lou, Yong Li, Dongmei Xue, Yi Chen, Chunyan Wu, Chris B. Zou, Yakov Kuzyakov. Long-term effects of nitrogen fertilization on aggregation and localization of carbon, nitrogen and microbial activities in soil. Science of The Total Environment. 2017; 624 ():1131-1139.
Chicago/Turabian StyleYidong Wang; Zhong-Liang Wang; Qingzhong Zhang; Ning Hu; Zhongfang Li; Yilai Lou; Yong Li; Dongmei Xue; Yi Chen; Chunyan Wu; Chris B. Zou; Yakov Kuzyakov. 2017. "Long-term effects of nitrogen fertilization on aggregation and localization of carbon, nitrogen and microbial activities in soil." Science of The Total Environment 624, no. : 1131-1139.
Thinning forest stands changes biotic and abiotic conditions, subsequently altering understory communities including their photosynthetic characteristics. We investigated the effects of thinning (25% basal area decrease) in a subtropical Pinus massoniana Lamb. plantation at two post-thinning times: 0.5 years (PT0.5) and 2.5 years (PT2.5). Thinning (PT0.5 and PT2.5) significantly increased understory density (+104.9% and +142.4%, respectively), aboveground biomass (+191.1% and +239.2%, respectively), the Shannon–Wiener index, and the Pielou index and decreased the Simpson index (p < 0.05). Species richness significantly increased at PT0.5 and decreased at PT2.5 (p < 0.05). Photosynthetic characteristics of new and old leaves of three dominant species (Woodwardia japonica (Linn. f.) Sm., Dryopteris championii (Benth.) C. Chr., and Dicranopteris dichotoma (Thunb.) Bernh.) showed different variations at 0.5 and 2.5 years after thinning, depending on their various adaptive strategies. Generally, thinning improved leaf carbon fixation capacity of these dominant plants (except W. japonica old leaves). Leaf photosynthetic characteristics of these species exhibited some common changes with respect to leaf morphological attributes and chlorophyll content. Thinning increased new-leaf length (or width) and reduced old-leaf chlorophyll b concentration at PT0.5 but reduced new-leaf length, specific leaf area, and all-leaf chlorophyll concentration at PT2.5. In conclusion, thinning is a useful tool for increasing understory abundance and carbon fixation capacity of some fern species.
Chuanpeng Cheng; Yidong Wang; Xiaoli Fu; Mingjie Xu; Xiaoqin Dai; Huimin Wang. Thinning effect on understory community and photosynthetic characteristics in a subtropical Pinus massoniana plantation. Canadian Journal of Forest Research 2017, 47, 1104 -1115.
AMA StyleChuanpeng Cheng, Yidong Wang, Xiaoli Fu, Mingjie Xu, Xiaoqin Dai, Huimin Wang. Thinning effect on understory community and photosynthetic characteristics in a subtropical Pinus massoniana plantation. Canadian Journal of Forest Research. 2017; 47 (8):1104-1115.
Chicago/Turabian StyleChuanpeng Cheng; Yidong Wang; Xiaoli Fu; Mingjie Xu; Xiaoqin Dai; Huimin Wang. 2017. "Thinning effect on understory community and photosynthetic characteristics in a subtropical Pinus massoniana plantation." Canadian Journal of Forest Research 47, no. 8: 1104-1115.
Manure amendment affects soil organic carbon (SOC) sequestration, microbial biomass and activity, and aggregate formation. However, how soil aggregation regulates SOC sequestration and microbial activity after manuring has received less attention. We studied the distribution of SOC, microbial community composition and activity in four aggregate classes (>2, 1–2, 0.25–1, and 2 mm) by 2.4% (p < 0.05), and reduced the portion of microaggregates (2, 1–2, and 0.25–1 mm) but not of the microaggregates. The fungal/bacterial PLFA ratio remained unchanged in all aggregates. Manuring increased β-glucosidase and chitinase activities in two macroaggregate classes (>2, and 1–2 mm), but not in the microaggregates. In conclusion, SOC, microbial biomasses and enzyme activities in the macroaggregates are more sensitive to manuring than in the microaggregates. Soil aggregation regulates the distributions of SOC and microbial parameters after 23-year manure amendment.
Yidong Wang; Ning Hu; Tida Ge; Yakov Kuzyakov; Zhong-Liang Wang; Zhongfang Li; Zheng Tang; Yi Chen; Chunyan Wu; Yilai Lou. Soil aggregation regulates distributions of carbon, microbial community and enzyme activities after 23-year manure amendment. Applied Soil Ecology 2016, 111, 65 -72.
AMA StyleYidong Wang, Ning Hu, Tida Ge, Yakov Kuzyakov, Zhong-Liang Wang, Zhongfang Li, Zheng Tang, Yi Chen, Chunyan Wu, Yilai Lou. Soil aggregation regulates distributions of carbon, microbial community and enzyme activities after 23-year manure amendment. Applied Soil Ecology. 2016; 111 ():65-72.
Chicago/Turabian StyleYidong Wang; Ning Hu; Tida Ge; Yakov Kuzyakov; Zhong-Liang Wang; Zhongfang Li; Zheng Tang; Yi Chen; Chunyan Wu; Yilai Lou. 2016. "Soil aggregation regulates distributions of carbon, microbial community and enzyme activities after 23-year manure amendment." Applied Soil Ecology 111, no. : 65-72.
Land conversion from wetlands to farmlands is pervasive in coastal areas. However, comparisons of soil microbial community structure between native wetlands and long-term reclaimed farmlands have received less attention. We investigated this issue in two Phragmities austrialis wetlands with different hydrological regimes (permanent and seasonally inundated) based on phospholipid fatty acid (PLFA) analysis and 16S rRNA pyrosequencing. In the permanent wetland, the farmland had higher contents of fungal (+331 %), bacterial (+60 %), actinomycetic (+50 %), and total (+81 %) PLFAs compared with the native wetland. In the drained wetland, the farmland had higher fungal (+982 %) PLFAs contents, but lower contents of bacterial (−78 %), actinomycetic (−98 %) and total (−54 %) PLFAs compared with the native wetland. Bacteria and actinomycetes were dependent on wetland hydrological conditions, while fungi were sensitive to other alterations. Fungal/bacterial-PLFAs ratios were higher in farmlands than wetlands. The relative abundances of Proteobacteria, Firmicutes and Bacteroidetes were higher in farmlands than wetlands. Compared with PLFA, 16S rRNA differentiated fewer differences in bacterial community composition. Farmlands had lower bacterial Shannon-Wiener index compared with the permanent wetland, but not for the seasonal wetland. In conclusion, native wetlands and associated farmlands have differences in microbial community structure and diversity, which are mainly dependent on hydrological and nutrient conditions.
Shi-Qi Xu; Yidong Wang; Changcheng Guo; Zhigang Zhang; Yuntao Shang; Qing Chen; Zhong-Liang Wang. Comparison of Microbial Community Composition and Diversity in Native Coastal Wetlands and Wetlands that Have Undergone Long-Term Agricultural Reclamation. Wetlands 2016, 37, 99 -108.
AMA StyleShi-Qi Xu, Yidong Wang, Changcheng Guo, Zhigang Zhang, Yuntao Shang, Qing Chen, Zhong-Liang Wang. Comparison of Microbial Community Composition and Diversity in Native Coastal Wetlands and Wetlands that Have Undergone Long-Term Agricultural Reclamation. Wetlands. 2016; 37 (1):99-108.
Chicago/Turabian StyleShi-Qi Xu; Yidong Wang; Changcheng Guo; Zhigang Zhang; Yuntao Shang; Qing Chen; Zhong-Liang Wang. 2016. "Comparison of Microbial Community Composition and Diversity in Native Coastal Wetlands and Wetlands that Have Undergone Long-Term Agricultural Reclamation." Wetlands 37, no. 1: 99-108.
Reuben R. W. Wang. Effects of Mariculture and Solar-Salt Production on Sediment Microbial Community Structure in a Coastal Wetland. Journal of Coastal Research 2016, 33, 573 -582.
AMA StyleReuben R. W. Wang. Effects of Mariculture and Solar-Salt Production on Sediment Microbial Community Structure in a Coastal Wetland. Journal of Coastal Research. 2016; 33 (3):573-582.
Chicago/Turabian StyleReuben R. W. Wang. 2016. "Effects of Mariculture and Solar-Salt Production on Sediment Microbial Community Structure in a Coastal Wetland." Journal of Coastal Research 33, no. 3: 573-582.
Site preparation, as an important procedure before afforestation, can affect soil C release. However, the effect of site preparation on soil C release has not been sufficiently investigated. Two site clearing treatments (brush clearing and controlled burning) followed by three soil preparation treatments (overall soil preparation, spot soil preparation, and no soil preparation (control)) were carried out in subtropical China. Soil basal respiration (RS) and C release of biomass burning were measured as soil C release on an area basis from March 2011 to March 2013. The site preparations changed the soil C release in the first year but had no effects in the second year. Compared with brush clearing (control), controlled burning (control) significantly increased the annual soil C release (decreased RS but increased C release of biomass burning) during the first year. Within the brush clearing plots, overall soil preparation significantly increased the RS rate over eight months and resulted in an increase in annual soil C release during the first year compared to the no soil preparation. In contrast, spot soil preparation increased the RS rate only for three months and did not affect the annual soil C release during the first year relative to the no soil preparation. In the controlled burning plots, both overall and spot soil preparation increased the RS rate across six months, but only overall soil preparation caused a significant increase in the annual soil C release. Our study suggests that minimizing the disturbance of the site preparation would decrease soil C release. Concluding, the spot soil preparation followed brush clearing is a good choice for site preparation in term of soil C storage.
Jianlei Wang; Huimin Wang; Xiaoli Fu; Mingjie Xu; Yidong Wang. Effects of site preparation treatments before afforestation on soil carbon release. Forest Ecology and Management 2016, 361, 277 -285.
AMA StyleJianlei Wang, Huimin Wang, Xiaoli Fu, Mingjie Xu, Yidong Wang. Effects of site preparation treatments before afforestation on soil carbon release. Forest Ecology and Management. 2016; 361 ():277-285.
Chicago/Turabian StyleJianlei Wang; Huimin Wang; Xiaoli Fu; Mingjie Xu; Yidong Wang. 2016. "Effects of site preparation treatments before afforestation on soil carbon release." Forest Ecology and Management 361, no. : 277-285.
Yidong Wang; Huimin Wang; Mingjie Xu; Zeqing Ma; Zhong-Liang Wang. Soil organic carbon stocks and CO2 effluxes of native and exotic pine plantations in subtropical China. CATENA 2015, 128, 167 -173.
AMA StyleYidong Wang, Huimin Wang, Mingjie Xu, Zeqing Ma, Zhong-Liang Wang. Soil organic carbon stocks and CO2 effluxes of native and exotic pine plantations in subtropical China. CATENA. 2015; 128 ():167-173.
Chicago/Turabian StyleYidong Wang; Huimin Wang; Mingjie Xu; Zeqing Ma; Zhong-Liang Wang. 2015. "Soil organic carbon stocks and CO2 effluxes of native and exotic pine plantations in subtropical China." CATENA 128, no. : 167-173.
Fertilizer application can potentially change soil organic C (SOC) sequestration of croplands. However, how fertilization affects SOC sequestration and soil C fractions has not been sufficiently investigated. Here, we studied this issue in a rice–barley system of eastern China after 23-year repeated organic and chemical fertilizer amendments. The fertilization treatments were as follows: unfertilized control (CK), pig manure (M), chemical fertilizer NPK (NPK), and pig manure combined with NPK (MNPK). Our results showed that M, NPK, and MNPK significantly increased 25, 13, and 30 % of SOC content as compared with CK. Compared with CK, the three fertilizations, especially manure addition, significantly increased the content of SOC fractions such as microbial biomass C, dissolved organic C, labile organic C, and particulate organic C. Compared with the initial SOC stock at 0–20-cm depth (41.2 Mg C ha−1), M, NPK, and MNPK increased 11, 1, and 16 % of SOC storage, respectively, whereas CK decreased 9 % of SOC pool. The SOC sequestration was positively correlated with the cumulative C input (root residue-C + manure-C) (SOC sequestration = 0.21 × C input − 5.67, R 2 = 0.88, P < 0.001). This linear relationship suggested that (i) the soil had not reached a SOC saturation, (ii) the conversion rate from input-C to SOC was 21 %, and (iii) a C input threshold of 1.17 Mg C ha−1 year−1 was needed for maintaining the initial SOC level. Therefore, manure application is recommended for promoting SOC sequestration in the rice–barley cropping system of eastern China.
Yidong Wang; Ning Hu; Minggang Xu; Zhongfang Li; Yilai Lou; Yi Chen; Chunyan Wu; Zhong-Liang Wang. 23-year manure and fertilizer application increases soil organic carbon sequestration of a rice–barley cropping system. Biology and Fertility of Soils 2015, 51, 583 -591.
AMA StyleYidong Wang, Ning Hu, Minggang Xu, Zhongfang Li, Yilai Lou, Yi Chen, Chunyan Wu, Zhong-Liang Wang. 23-year manure and fertilizer application increases soil organic carbon sequestration of a rice–barley cropping system. Biology and Fertility of Soils. 2015; 51 (5):583-591.
Chicago/Turabian StyleYidong Wang; Ning Hu; Minggang Xu; Zhongfang Li; Yilai Lou; Yi Chen; Chunyan Wu; Zhong-Liang Wang. 2015. "23-year manure and fertilizer application increases soil organic carbon sequestration of a rice–barley cropping system." Biology and Fertility of Soils 51, no. 5: 583-591.
Over the past six decades, coastal wetlands in China have experienced rapid and extensive agricultural reclamation. In the context of saline conditions, long-term effect of cultivation after reclamation on soil chemical properties has not been well understood. We studied this issue using a case of approximately 60-years cultivation of a coastal saline marsh in Bohai Rim, northern China. The results showed that long-term reclamation significantly decreased soil organic carbon (SOC) (−42.2%) and total nitrogen (TN) (−25.8%) at surface layer (0–30 cm) as well as their stratification ratios (SRs) (0–5 cm:50–70 cm and 5–10 cm:50–70 cm). However, there was no significant change in total phosphorus (TP) as well as its SRs under cultivation. Cultivation markedly reduced ratios of SOC to TN, SOC to TP and TN to TP at surface layer (0–30 cm) and their SRs (0–5 cm:50–70 cm). After cultivation, electrical conductivity and salinity significantly decreased by 60.1% and 55.3% at 0–100 cm layer, respectively, suggesting a great desalinization. In contrast, soil pH at 20–70 cm horizons notably increased as an effect of reclamation. Cultivation also changed compositions of cations at 0–10 cm layer and anions at 5–100 cm layer, mainly decreasing the proportion of Na+, Cl− and SO42−. Furthermore, cultivation significantly reduced the sodium adsorption ratio and exchangeable sodium percentage in plow-layer (0–20 cm) but not residual sodium carbonate, suggesting a reduction in sodium harm.
Yidong Wang; Zhong-Liang Wang; Xiaoping Feng; Changcheng Guo; Qing Chen. Long-Term Effect of Agricultural Reclamation on Soil Chemical Properties of a Coastal Saline Marsh in Bohai Rim, Northern China. PLoS ONE 2014, 9, e93727 .
AMA StyleYidong Wang, Zhong-Liang Wang, Xiaoping Feng, Changcheng Guo, Qing Chen. Long-Term Effect of Agricultural Reclamation on Soil Chemical Properties of a Coastal Saline Marsh in Bohai Rim, Northern China. PLoS ONE. 2014; 9 (4):e93727.
Chicago/Turabian StyleYidong Wang; Zhong-Liang Wang; Xiaoping Feng; Changcheng Guo; Qing Chen. 2014. "Long-Term Effect of Agricultural Reclamation on Soil Chemical Properties of a Coastal Saline Marsh in Bohai Rim, Northern China." PLoS ONE 9, no. 4: e93727.
Because evapotranspiration (ET) is the second largest component of the water cycle and a critical process in terrestrial ecosystems, understanding the inter-annual variability of ET is important in the context of global climate change. Eight years of continuous eddy covariance measurements (2003–2010) in a subtropical coniferous plantation were used to investigate the impacts of climatic factors and ecosystem responses on the inter-annual variability of ET. The mean and standard deviation of annual ET for 2003–2010 were 786.9 and 103.4 mm (with a coefficient of variation of 13.1%), respectively. The inter-annual variability of ET was largely created in three periods: March, May–June, and October, which are the transition periods between seasons. A set of look-up table approaches were used to separate the sources of inter-annual variability of ET. The annual ETs were calculated by assuming that (a) both the climate and ecosystem responses among years are variable (Vcli-eco), (b) the climate is variable but the ecosystem responses are constant (Vcli), and (c) the climate is constant but ecosystem responses are variable (Veco). The ETs that were calculated under the above assumptions suggested that the inter-annual variability of ET was dominated by ecosystem responses and that there was a negative interaction between the effects of climate and ecosystem responses. These results suggested that for long-term predictions of water and energy balance in global climate change projections, the ecosystem responses must be taken into account to better constrain the uncertainties associated with estimation.
Mingjie Xu; Xuefa Wen; Huimin Wang; Wenjiang Zhang; Xiaoqin Dai; Jie Song; Yidong Wang; Xiaoli Fu; Yunfen Liu; Xiaomin Sun; Guirui Yu. Effects of Climatic Factors and Ecosystem Responses on the Inter-Annual Variability of Evapotranspiration in a Coniferous Plantation in Subtropical China. PLOS ONE 2014, 9, e85593 .
AMA StyleMingjie Xu, Xuefa Wen, Huimin Wang, Wenjiang Zhang, Xiaoqin Dai, Jie Song, Yidong Wang, Xiaoli Fu, Yunfen Liu, Xiaomin Sun, Guirui Yu. Effects of Climatic Factors and Ecosystem Responses on the Inter-Annual Variability of Evapotranspiration in a Coniferous Plantation in Subtropical China. PLOS ONE. 2014; 9 (1):e85593.
Chicago/Turabian StyleMingjie Xu; Xuefa Wen; Huimin Wang; Wenjiang Zhang; Xiaoqin Dai; Jie Song; Yidong Wang; Xiaoli Fu; Yunfen Liu; Xiaomin Sun; Guirui Yu. 2014. "Effects of Climatic Factors and Ecosystem Responses on the Inter-Annual Variability of Evapotranspiration in a Coniferous Plantation in Subtropical China." PLOS ONE 9, no. 1: e85593.
Yidong Wang; Huimin Wang; Zhong-Liang Wang; Zeqing Ma; Xiaoqin Dai; Xuefa Wen; Yunfen Liu. Effect of litter layer on soil–atmosphere N2O flux of a subtropical pine plantation in China. Atmospheric Environment 2014, 82, 106 -112.
AMA StyleYidong Wang, Huimin Wang, Zhong-Liang Wang, Zeqing Ma, Xiaoqin Dai, Xuefa Wen, Yunfen Liu. Effect of litter layer on soil–atmosphere N2O flux of a subtropical pine plantation in China. Atmospheric Environment. 2014; 82 ():106-112.
Chicago/Turabian StyleYidong Wang; Huimin Wang; Zhong-Liang Wang; Zeqing Ma; Xiaoqin Dai; Xuefa Wen; Yunfen Liu. 2014. "Effect of litter layer on soil–atmosphere N2O flux of a subtropical pine plantation in China." Atmospheric Environment 82, no. : 106-112.
Afforestation and ecological restoration have often been carried out with fast-growing exotic tree species because of their high apparent growth and yield. Moreover, fast-growing forest plantations have become an important component of mitigation measures to offset greenhouse gas emissions. However, information on the long-term performance of exotic and fast-growing species is often lacking especially with respect to their vulnerability to disturbance compared to native species. We compared carbon (C) storage and C accumulation rates in vegetation (above- and belowground) and soil in 21-year-old exotic slash pine (Pinus elliottii Engelm.) and native Masson pine (Pinus massoniana Lamb.) plantations, as well as their responses to a severe ice storm in 2008. Our results showed that mean C storage was 116.77 ± 7.49 t C ha−1 in slash pine plantation and 117.89 ± 8.27 t C ha−1 in Masson pine plantation. The aboveground C increased at a rate of 2.18 t C ha−1 year−1 in Masson pine and 2.23 t C ha−1 year−1 in slash pine plantation, and there was no significant difference in C storage accumulation between the two plantation types. However, we observed significant differences in ice storm damage with nearly 7.5 % of aboveground biomass loss in slash pine plantation compared with only 0.3 % loss in Masson pine plantation. Our findings indicated that the native pine species was more resistant to ice storm because of their adaptive biological traits (tree shape, crown structure, and leaf surface area). Overall, the native pine species might be a safer choice for both afforestation and ecological restoration in our study region.
Zeqing Ma; Henrik Hartmann; Huimin Wang; Qingkang Li; Yidong Wang; Shenggong Li. Carbon dynamics and stability between native Masson pine and exotic slash pine plantations in subtropical China. European Journal of Forest Research 2013, 133, 307 -321.
AMA StyleZeqing Ma, Henrik Hartmann, Huimin Wang, Qingkang Li, Yidong Wang, Shenggong Li. Carbon dynamics and stability between native Masson pine and exotic slash pine plantations in subtropical China. European Journal of Forest Research. 2013; 133 (2):307-321.
Chicago/Turabian StyleZeqing Ma; Henrik Hartmann; Huimin Wang; Qingkang Li; Yidong Wang; Shenggong Li. 2013. "Carbon dynamics and stability between native Masson pine and exotic slash pine plantations in subtropical China." European Journal of Forest Research 133, no. 2: 307-321.
Forest soils are well known sinks for atmospheric methane (CH4), but how the surface litter layer controls gas diffusion into the mineral soil is still unclear. Seasonal rainfall in the humid climate provides a unique opportunity to examine uptake of atmospheric CH4 under a wide range of soil water content (SWC). We studied this question using a litter removal method in a 20-year-old slash pine (Pinus elliottii) plantation in subtropical China during 2005–2007. Soil-atmosphere CH4 fluxes of the control (FCK) and litter-free (FLF) treatments and their differences (litter-affected CH4 flux, FCK–LF = FCK − FLF) were all significantly influenced by SWC and not by soil temperature. Litter layer reduced atmospheric CH4 uptake by soil when SWC was below 15.8 vol%, and increased atmospheric CH4 consumption by soil when SWC was above this value. We concluded that the litter layer acts as a moisture-induced bidirectional buffer for atmospheric CH4 uptake by soils in a subtropical humid pine plantation. However, the removal of the litter layer had a minimal effect (+0.7%) on annual atmospheric CH4 uptake by soil, through compensating effects during the wet and dry seasons. Therefore, in the context of climate change, future changes in SWC will alter the strength of atmospheric CH4 uptake by soils of subtropical pine plantations.
Yidong Wang; Huimin Wang; Zeqing Ma; Xiaoqin Dai; Xuefa Wen; Yunfen Liu; Zhong-Liang Wang. The litter layer acts as a moisture-induced bidirectional buffer for atmospheric methane uptake by soil of a subtropical pine plantation. Soil Biology and Biochemistry 2013, 66, 45 -50.
AMA StyleYidong Wang, Huimin Wang, Zeqing Ma, Xiaoqin Dai, Xuefa Wen, Yunfen Liu, Zhong-Liang Wang. The litter layer acts as a moisture-induced bidirectional buffer for atmospheric methane uptake by soil of a subtropical pine plantation. Soil Biology and Biochemistry. 2013; 66 ():45-50.
Chicago/Turabian StyleYidong Wang; Huimin Wang; Zeqing Ma; Xiaoqin Dai; Xuefa Wen; Yunfen Liu; Zhong-Liang Wang. 2013. "The litter layer acts as a moisture-induced bidirectional buffer for atmospheric methane uptake by soil of a subtropical pine plantation." Soil Biology and Biochemistry 66, no. : 45-50.
In early 2008, an unexpected ice storm hits southern China, severely affected the subtropical forest ecosystems. We used the moderate resolution imaging spectroradiometer products of Enhanced Vegetation Index (EVI) corroborated with information gathered from field investigations to analyze the spatial patterns of forest damage in Poyang Lake Basin. The results showed that forests on windward aspects and 400–1,000 m elevation zones are sensitive to ice storm. The spatial pattern of forest damage after the ice storm can be understood in light of topographical sheltering effect. Due to the mountains of the basin blocked the cold flow and wind, the damage on windward aspects showed more severity than other aspects, which was similar like previous studies in North America. The most severe canopy loss beyond 63 % (EVI loss 0.085) occurring on 400–800 m elevation zones. The secondary severe forest damage was on 800–1,500 m elevation zones with canopy loss 33 % (EVI loss 0.035), which unlike previous studies in North American that found damage was rapidly decreased at these elevations. This observation fits the ecological disturbances theory suggests that ice storms generating greater damage in forests which less frequently impacted by ice disturbance events. There appears to be a broader pattern of forest damage associated with ice storm in subtropical forests than in temperate regions. This implies that the subtropical forests are more vulnerable than temperate forests to ice storm disturbance.
Leilei Shi; Huimin Wang; Wenjiang Zhang; Quanqin Shao; Fengting Yang; Zeqing Ma; Yidong Wang. Spatial response patterns of subtropical forests to a heavy ice storm: a case study in Poyang Lake Basin, southern China. Natural Hazards 2013, 69, 2179 -2196.
AMA StyleLeilei Shi, Huimin Wang, Wenjiang Zhang, Quanqin Shao, Fengting Yang, Zeqing Ma, Yidong Wang. Spatial response patterns of subtropical forests to a heavy ice storm: a case study in Poyang Lake Basin, southern China. Natural Hazards. 2013; 69 (3):2179-2196.
Chicago/Turabian StyleLeilei Shi; Huimin Wang; Wenjiang Zhang; Quanqin Shao; Fengting Yang; Zeqing Ma; Yidong Wang. 2013. "Spatial response patterns of subtropical forests to a heavy ice storm: a case study in Poyang Lake Basin, southern China." Natural Hazards 69, no. 3: 2179-2196.
Optimizing a manual measurement schedule (both frequency and pattern) for estimating annual soil respiration (RS) is an important but unresolved issue. We hypothesized that (i) an optimal sampling setup can be found to obtain a reliable annual RS, and (ii) if the desired outcome is a multi-year mean annual RS, a lower sampling frequency might be adequate. Here we explored these issues using a three-year chamber-based dataset, with a sampling frequency of twice per week (defined as control), in an exotic slash pine (Pinus elliottii Englem.) plantation in subtropical China. The results showed that RS during 9:00–11:00 a.m. represented diurnal mean RS well. In order to obtain an annual RS as reliable as the control (deviation within ±5%), the optimal measurement strategy is a biweekly sampling across a year and not a trade-off sampling pattern (monthly sampling combined with weekly sampling depending on the seasons). Furthermore, despite an obvious inter-annual variability in RS (548.4–757.5 g C m−2 year−1, CV = 16.3%), a monthly sampling was sufficient to obtain an unbiased multi-year mean annual RS (deviation within ±5%). Such findings are useful when easy looking for estimates of annual ecosystem carbon budgets. However, the generality needs to be examined in other ecosystems.
Yidong Wang; Huimin Wang; Zhong-Liang Wang; Wenjiang Zhang; Changcheng Guo; Xuefa Wen; Yunfen Liu. Optimizing manual sampling schedule for estimating annual soil CO2 efflux in a young exotic pine plantation in subtropical China. European Journal of Soil Biology 2012, 52, 41 -47.
AMA StyleYidong Wang, Huimin Wang, Zhong-Liang Wang, Wenjiang Zhang, Changcheng Guo, Xuefa Wen, Yunfen Liu. Optimizing manual sampling schedule for estimating annual soil CO2 efflux in a young exotic pine plantation in subtropical China. European Journal of Soil Biology. 2012; 52 ():41-47.
Chicago/Turabian StyleYidong Wang; Huimin Wang; Zhong-Liang Wang; Wenjiang Zhang; Changcheng Guo; Xuefa Wen; Yunfen Liu. 2012. "Optimizing manual sampling schedule for estimating annual soil CO2 efflux in a young exotic pine plantation in subtropical China." European Journal of Soil Biology 52, no. : 41-47.