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Satellite remote sensing reveals overwhelming recovery of forest from disturbances in Asia

Atmospheric and Oceanic Science Letters 2025年第1期18卷 46-51页

作者： Yiying Zhu Hesong Wang Anzhi Zhang School of ecology and Nature Conservation Beijing Forestry UniversityBeijingChina Key Laboratory of Regional Climate and environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Forestry and Landscape Architecture Xinjiang Agricultural UniversityUrumqiChina

Forest ecosystems play key roles in mitigating human-induced climate change through enhanced carbon uptake;however,frequently occurring climate extremes and human activities have considerably threatened the stability of *** the same time,detailed accounts of disturbances and forest responses are not yet well quantified in *** study employed the Breaks For Additive Seasonal and Trend method-an abrupt-change detection method-to analyze the Enhanced Vegetation Index time series in East Asia,South Asia,and Southeast *** approach allowed us to detect forest disturbance and quantify the resilience after *** showed that 20%of forests experienced disturbance with an increasing trend from 2000 to 2022,and Southeast Asian countries were more severely affected by ***,95%of forests had robust resilience and could recover from disturbance within a few *** resilience of forests suffering from greater magnitude of disturbance tended to be stronger than forests with lower disturbance *** summary,this study investigated the resilience of forests across the low and middle latitudes of Asia over the past two *** authors found that most forests exhibited good resilience after disturbance and about two-thirds had recovered to a better state in *** findings of this study underscore the complex relationship between disturbance and resilience,contributing to comprehension of forest resilience through satellite remote sensing.

关键词： Forest ecosystem Enhanced vegetation index Breaks for additive seasonal and trend method Disturbance Resilience

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Numerical study of regional environmental carrying capacity for livestock and poultry farming based on planting-breeding balance

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Journal of environmental Sciences 2013年第9期25卷 1882-1889页

作者： Lihong Peng Yu Bai College of the environment & ecology Xiamen University

In consideration of the need to maintain planting-breeding balance, this article examines the capacity of the soil in Putian City, Fujian Province to absorb livestock and poultry excreta, and computes the environmental carrying capacity for livestock and poultry farming （ECCLPF） in each district of the city in terms of the fertility characteristics of the soil in the city, as well as its mix of crops cultivated and farming methods. On the basis of the computations, this work proceeds to classify the alarm grades of the city＇s environmental carrying capacity for livestock and poultry framing, and assess the environmental impact of the livestock and poultry farming industry. The results of our study indicate that, the city＇s ECCLPF ranges from 8.27 to 23.23 heads per ha when computed on the basis of nitrogen, and from 5.79 to 24.53 heads per ha when computed on the basis of phosphorus. A comparison between our research findings and the existing farming scale in Putian reveals that, in certain parts of the city, ECCLPF is overburdened to varying degrees. Specifically, Chengxiang District is severely overburdened, Hanjiang District and Meizhou Island have a level of overburdening between virtual overburdening and significant overburdening, Licheng District is virtually overburdened, and Xiuyu, Xianyou, and Bei＇an Districts have not exceeded their environmental carrying capacity and therefore have varying levels of potential for growth.

关键词： livestock and poultry farming planting-breeding combination nitrogen and phosphorus balance alarm classification system

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Effect of precipitation pH and coexisting magnesium ion on phosphate adsorption onto hydrous zirconium oxide

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Journal of environmental Sciences 2019年第2期31卷 167-187页

作者： Jianwei Lin Xingxing Wang Yanhui Zhan College of Marine ecology and environment Shanghai Ocean University

To understand the effect of precipitation pH and coexisting Mg^(2+) on phosphate adsorption onto zirconium oxide(ZrO_2), ZrO_2 particles precipitated at pH 5.3, 7.1 and 10.5, i.e., ZrO_2(5.3), ZrO_2(7.1)and ZrO_2(10.5), respectively were prepared and characterized, then their adsorption performance and mechanism in the absence and presence of Mg^(2+) were comparatively investigated in this study. The results showed that the Elovich, pseudo-second-order and Langmuir isotherm models correlated with the experimental data well. The adsorption mechanism involved the complexation between phosphate and zirconium. Coexisting Mg^(2+) slightly inhibited the adsorption of phosphate on ZrO_2(5.3), including the adsorption capacity and rate, but coexisting Mg^(2+) greatly increased the adsorption capacity and rate for ZrO_2(7.1)and ZrO_2(10.5). The enhanced adsorption of phosphate on ZrO_2(7.1) and ZrO_2(10.5) in the presence of Mg^(2+) was mainly due to the formation of Mg^(2+)-HPO_4^(2-) ion pair(MgHPO_4~0) in the solution and then the adsorption of MgHPO_4~0 on the adsorbent surface, forming the phosphatebridged ternary complex Zr(OPO_3H)Mg. In the absence of Mg^(2+) , the maximum phosphate adsorption capacity at pH 7 calculated from the Langmuir isotherm model decreased in the order of ZrO 2(7.1)(67.3 mg/g) > ZrO_2(5.3)(53.6 mg/g) ≈ ZrO_2(10.5)(53.1 mg/g), but it followed the order of Zr O2(7.1)(97.0 mg/g) > ZrO_2(10.5)(79.7 mg/g) > ZrO_2(5.3)(51.3 mg/g) in the presence of Mg^(2+) . The results of this work suggest that ZrO_2(7.1) is more suitable for use as an adsorbent for the effective removal of phosphate from municipal wastewater than ZrO_2(5.3) and ZrO_2(10.5),because Mg^(2+) is generally present in this wastewater.

关键词： Hydrous zirconium oxide Different precipitation pH values Adsorption Phosphate Magnesium ion Effect

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One more step to realistic CO_(2) reduction reactions——geometric structures evolutions at gas-solid interface

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Rare Metals 2024年第2期43卷 849-852页

作者： Ya-Qiang Xie Xin Yu Ting Wang College of the environment and ecology Xiamen UniversityXiamen361102China

A rational design of copper(Cu)nanocatalyst is critical to the efficient carbon dioxide(CO_(2))conversion toward C1/C2 chemical ***,the lack of actual information on the vicinal Cu interfaces hinders the intrinsic activitystructure correlation *** with atomic-scale in situ characterizations(AP-STM and synchrotron-based AP-XPS),Park and co-workers study and identify the adsorbate-driven morphological evolution of Cu nanoclusters on the Cu(997)surface,providing real-space evidence for the critical role of vicinal structures on Cu *** observed surface roughening trends caused by dissociated atomic oxygen and CO adsorbates subsequently affect the result of successive catalytic reactions to produce critical intermediates,such as carbonate and formate,during the CO_(2)reduction reaction.

关键词： reaction critical rational

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UV/Chlorine-BAC treatment of antidepressant drug in drinking water:efficacy,process optimization,and microbiological characterization

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Frontiers of environmental Science & Engineering 2024年第10期18卷 127-138页

作者： Xianzhong Li Wanli Yan Jianguo Li Kaiting Zhang Chengsong Ye Mingbao Feng Xin Yu College of the environment&ecology Xiamen UniversityXiamen 361102China

The environmental pollution caused by psychotropic drugs harms human health and has prompted a stronger emphasis on research into water treatment *** UV/Chlorine-biological activated carbon(BAC)combined process was employed in this study to treat amitriptyline(AMT),a typical psychotropic drug,in slightly contaminated drinking *** removal efficiency of AMT in drinking water by UV/Chlorine and the feasibility of combining it with BAC were *** results demonstrated that the removal efficiency of 1μmol/L AMT could reach 98.5% of the 2.0 mg/L chlorine and UV treated for 30 min.A significant removal improvement of AMT was 10%-45% compared to UV alone,Chlorine alone,and other oxidants combined,especially the SOUR(Specific Oxygen Uptake Rate),which was 57%-90% compared to other oxidants ***,the optimal process parameters for UV/Chlorine-BAC treatment of slightly contaminated drinking water were a combination of UV exposure,chlorine dosage of 2 mg/L,and reaction times of i5 min followed by 30 min of BAC *** AMT degradation,CODMn removal efficiency,and NO_(3)-N production was 88%,65%,and 95%,*** was no significant effect on the number of microorganisms in the BAC medium,ensuring good long-term ***,an investigation was conducted to assess the influence of optimal process operation on the microbial community structure within *** analysis unveiled a positive feedback loop in the colony architecture after implementing ideal process *** study provides significant inspiration for addressing residual antidepressant issues using traditional drinking water treatment processes.

关键词： UV/Chlorine-BAC Amitriptyline removal Drinking water Microbial community

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Seed Dynamics in Relation to Gaps in a Tropical Montane Rainforest of Hainan Island,South China:(II)Seed Bank

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Journal of Integrative Plant Biology 2008年第5期50卷 513-521页

作者： Run-Guo Zang Yi Ding Wei-Yin Zhang Key Laboratory of Forest ecology and environment The State Forestry Administration Institute of Forest ecology Environment and Protection Chinese Academy of Forestry Beijing 100091 China

Spatial and temporal patterns of seed bank dynamics in relation to gaps in an old growth tropical montane rainforest of Hainan Island, South China, were studied over two consecutive years. From June 2001 to June 2003, soil seed bank sampling blocks were taken near each of the four sides of each seed trap and immediately put into a nursery for observation of seedling emergence dynamics in four seasons （each experiment in each season）. The abundances of seedlings that emerged from seed banks showed the trend of vine functional group （VFG）〉 shrub functional group （SFG）〉 tree functional group （TFG）〉 herb functional group （HFG）, but the trend in species richness of seedlings that emerged from the soil seed banks was TFG 〉 VFG 〉 SFG 〉 HFG. The abundances of seedlings that emerged from seed banks in the three gap zones showed no significant differences, but significant differences did exist for the species richness. The time of sampling or seasons of experiments had significant influences on both the species richness and seedling abundances. The seedling emergence processes of each experiment all revealed the unimodal patterns. Few emergences occurred 1 year after each experiment. Compared with those under closed canopies, the recruitment rates from seed to seedlings and from seedlings to saplings In gaps were higher, but the mortality rates from saplings to big trees were also higher in the gaps.

关键词： functional groups gap dynamics Hainan Island regeneration niche seed bank supply-side ecology tropical montane rainforest.

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Effect of Hillslope Gradient on Vegetation Recovery on Abandoned Land of Shifting Cultivation in Hainan Island,South China

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Journal of Integrative Plant Biology 2006年第6期48卷 642-653页

作者： Yi Ding Run-Guo Zang You-Xu Jiang Key Laboratory of Forest ecology and environment The State Forestry Administration Institute of Forest ecology Environment and Protection Chinese Academy of Forestry Beijing 100091 China

In the present study, we investigated the effect of hillslope gradient on vegetation recovery on abandoned land of shifting cultivation In Hainan Island, south China, by measuring community composition and structure of 25-year-old secondary forest fallows along a hillslope gradient （up-, middle-, and down-slope position）. A total of 49 733 free-standing woody plant stems higher than 10 cm and belonging to 170 species, 112 genera, and 57 families was found in the three l-hm2 investigation plots. Stem density was highest in the down-slope stand and lowest in the up-slope stand. Species richness and the Shannon-Wiener Index were both highest in the middle-slope stand, and lower In the down-slope and up-slope stands. The recovery forest fallows on different hiUslope positions were all dominated by a few species. The five most abundant species accounted for 70.1%, 58.8%, and 72.9% of total stem densities in stands in the up-, middle-, and down-slope positions, respectively. The five species with the greatest basal areas accounted for 74.5%, 84.3%, and 74.7% of total stem basal area for the up-, middle-, and down-slope positions, respectively. The number of low-density species （stem abundance less than five） Increased from the up-slope position downward. Of the nine local common species among three different functional groups, the short-lived pioneer species dominated the up-slope position, but long-lived pioneer species dominated the middle- and down-slope positions. The climax species of primary tropical lowland rain forest was found in the downslope position. Both the mean diameter at breast height （DBH） and mean height of the trees Increased with decreasing hillslope gradient. The stem density and basal area in different size classes were significantly different in stands In different slope positions. Our results indicated that the rate of secondary succession varies, even over small spatial scales caused by the hlllslope gradient, in early vegetation recovery.

关键词： community structure functional groups Hainan Island hillslope gradient shifting cultivation species diversity tropical rain forest vegetation recovery.

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Quantifying the impacts of soil water stress on the winter wheat growth in an arid region,Xinjiang

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Journal of Arid Land 2009年第1期1卷 34-42页

作者： Yilihm.Yimam Key Laboratory of Oasis ecology and Desert environment Xinjiang Institute of Ecology and Geography

Wheat growth in response to soil water deficit play an important role in yield stability. A field experiment was conducted for winter wheat (Triticum aestivum L.) during the period of 2002-2005 to evaluate the effects of limited irrigation on winter wheat growth. 80%, 70%, 60%, 50% and 40% of field capacity was applied at different stages of crop growth. Photosynthetic characteristics of winter wheat, such as photosynthesis rate, transpiration rate, stomatal conductance, photosynthetically active radiation, and soil water content, root and shoot dry mass accumulation were measured, and the root water uptake and water balance in different layer were calculated. Based on the theory of unsaturated dynamic, a one-dimensional numerical model was developed to simulate the effect of soil water movement on winter wheat growth using Hydrus-1 D. The soil water content of stratified soil in the experimental plot was calculated under deficit irrigation. The results showed that, in different growing periods, evapotranspiration, grain yield, biomass, root water uptake, water use efficiency, and photosynthetic characteristics depended on the controlled ranges of soil water content. Grain yield response to irrigation varied considerably due to differences in soil moisture contents and irrigation scheduling between seasons. Evapotranspiration was largest in the high soil moisture treatment, and so was the biomass, but this treatment did not produce the highest grain yield and root water uptake was relatively low. Maximum depth of root water uptake is from the upper 80 cm in soil profile in jointing stage and dropped rapidly upper 40 cm after heading stage, and the velocity of root water uptake in latter stage was less than that in middle stage. The effect of limited irrigation treatment on photosynthesis was complex owing to microclimate. But root water uptake increased linearly with harvest yield and improvement in the latter gave better root water uptake under limited irrigation c

关键词： soil water water stress deficit irrigation numerical simulation photosynthesis arid region

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Seed Dynamics in Relation to Gaps in a Tropical Montane Rainforest of Hainan Island,South China:(Ⅰ)Seed Rain

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Journal of Integrative Plant Biology 2007年第11期49卷 1565-1572页

作者： Run-Guo Zang Wei-Yin Zhang Yi Ding Kay Laboratory of Forest ecology and environment the State Forestry Administration Institute of Forest ecology Environment and Protection Chinese Academy of Forastry Beijing 100091 China

Seed dynamics is an important part of stand dynamics in forest ecosystems. In this paper, 26 gaps were randomly selected to study the influence of gaps on the spatial and temporal patterns of seed rains in a tropical montane rainforest of Hainan Island, South China. Three zones for each gap, including outside gap zone （Non-gap）, transitional gap zone （EG-CG）, and central gap zone （CG）, were designed, and fourseed traps （each lm x lm in size） were placed in each zone. Seed rains were collected by these traps every 10 days from June 2001 to May 2002. Seed rain varied greatly with season and generally exhibited a pattern of unimodal change during the study period： seed abundance and species richness were both greater in the wet season than in the dry season. Gaps significantly influenced the temporal patterns of both species richness and density of seed rains. Gaps had no significant influences on the spatial distribution patterns of seed rain species richness, but significantly affected the spatial distribution pattern of seed rain densities. Among the three different zones of gaps, the outside gap zone generally received more seeds inputs than the two other gap zones.

关键词： forest regeneration gap dynamics Hainan Island seed dispersal seed rain supply-side process tropical montane rain forest.

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Adaptive nanoconfined Fenton-like reactions: Tailoring carbon pathways for sustainable water treatment and energy harvesting

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Chinese Chemical Letters 2024年第12期35卷 38-40页

作者： Yanhua Peng Xin Yu Ting Wang College of the environment and ecology Xiamen University

Chemical oxidation, typified by Fenton and Fenton-like reactions, is a widely adopted and promising wastewater treatment technology, known for its ability to produce highly reactive oxide species that efficiently remove pollutants[1-3]. However, this process typically demands significant energy/chemical agent input to mineralize organic pollutants, converting the carbon within them into CO2.

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