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Canopy structural heterogeneity drives α and β species-genetic diversity correlations in a Chinese subtropical forest

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Plant Diversity 2025年第1期47卷 106-114页

作者： Zhiliang Yao Xia Pan Xin Yang Xiaona Shao Bin Wang Yun Deng Zhiming Zhang Qiaoming Li Luxiang Lin CAS Key Laboratory of Tropical Forest ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesKunming 650223YunnanChina University of Chinese Academy of Sciences Beijing 100049China School of ecology and Environment Hainan UniversityHaikou 570228HainanChina State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland AdministrationForestry College of Shandong Agricultural UniversityTai'an 271018ShandongChina School of ecology and Environmental Sciences&Yunnan Key Laboratory for Plateau Mountain ecology and Restoration of Degraded Environments Yunnan UniversityKunming 650500YunnanChina National Forest Ecosystem Research Station at Xishuangbanna Mengla 666303YunnanChina

Patterns and drivers of species–genetic diversity correlations(SGDCs)have been broadly examined across taxa and ecosystems and greatly deepen our understanding of how biodiversity is ***,few studies have examined the role of canopy structural heterogeneity,which is a defining feature of forests,in shaping ***,we determine what factors contribute toα-andβ-species–genetic diversity correlations(i.e.,α-andβ-SGDCs)in a Chinese subtropical *** this purpose,we used neutral molecular markers to assess genetic variation in almost all adult individuals of the dominant tree species,Lithocarpus xylocarpus,across plots in the Ailaoshan National Natural *** also quantified microhabitat variation by quantifying canopy structure heterogeneity with airborne laser scanning on 201-ha subtropical forest *** found that speciesα-diversity was negatively correlated with geneticα-*** structural heterogeneity was positively correlated with speciesα-diversity but negatively correlated with geneticα-*** contrasting effects contributed to the formation of a negativeα-***,we found that canopy structural heterogeneity increases speciesα-diversity and decreases geneticα-diversity by reducing the population size of target ***β-diversity,in contrast,was positively correlated with geneticβ-*** in canopy structural heterogeneity between plots had non-linear parallel effects on the two levels ofβ-diversity,while geographic distance had a relatively weak effect onβ-*** study indicates that canopy structural heterogeneity simultaneously affects plot-level community species diversity and population genetic diversity,and species and genetic turnover across plots,thus drivingα-andβ-SGDCs.

关键词： Dominant species Forest structure LiDAR Lithocarpus xylocarpus Speciesegenetic diversity correlation Subtropical evergreen broad-leaved forest

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Road induced edge effects on a forest bird community in tropical Asia

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Avian Research 2018年第2期9卷 123-135页

作者： Daphawan Khamcha Richard T.Corlett Larkin A.Powell Tommaso Savini Antony J.Lynam George A.Gale conservation ecology program School of Bioresources and Technology King Mongkut’s University of Technology Thonburi Center for Integrative conservation Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences School of Natural Resources University of Nebraska-Lincoln Wildlife conservation Society Global Conservation Program

Background: Edge effects cause changes in bird community richness, abundance, and/or distribution within a landscape, but the avian guilds most influenced can vary among regions. Although Southeast Asia has the highest rates of deforestation and projected species loss, and is currently undergoing an explosive growth in road infrastructure, there have been few studies of the effects of forest edges on avian communities in this ***: We examined avian community structure in a dry evergreen forest in northeastern Thailand adjacent to a five-lane highway. We evaluated the richness and abundance of birds in 11 guilds at 24 survey points on three parallel transects perpendicular to the edge. At each point, 10-min surveys were conducted during February-August 2014 and March-August 2015. Vegetation measurements were conducted at 16 of the bird survey points and ambient noise was measured at all 24 survey ***: We found a strongly negative response to the forest edge for bark-gleaning, sallying, terrestrial, and understory insectivores and a weakly negative response for arboreal frugivore-insectivores, foliage gleaning insectivores, and raptors. Densities of trees and the percentage canopy cover were higher in the interior, and the ambient noise was lower. In contrast, arboreal nectarivore-insectivores responded positively to the forest edge, where there was a higher vegetation cover in the ground layer, a lower tree density, and a higher level of ambient ***: Planners should avoid road development in forests of high conservation value to reduce impacts on biodiversity. Where avoidance is impossible, a number of potential mitigation methods are available, but more detailed assessments of these are needed before they are applied in this region.

关键词： Road edge Avian guilds Dry evergreen forest Thailand

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Enhancing microbial superoxide generation and conversion to hydroxyl radicals for enhanced bioremediation using iron-binding ligands

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Journal of Environmental Sciences 2025年第1期147卷 597-606页

作者： Yuhan Wang Xue Ning Jinsong Liang Aijie Wang Jiuhui Qu School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China SFI MaREI Centre for Energy Climate and MarineEnvironmental Research InstituteUniversity College CorkCorkIreland Center for Water and ecology Tsinghua UniversityBeijing 100084China

Harnessing bacteria for superoxide production in bioremediation holds immense promise,yet its practical application is hindered by slow production rates and the relatively weak redox potential of *** study delves into a cost-effective approach to amplify superoxide production using an Arthrobacter strain,a prevalent soil bacterial *** research reveals that introducing a carbon source along with specific iron-binding ligands,including deferoxamine(DFO),diethylenetriamine pentaacetate(DTPA),citrate,and oxalate,robustly augments microbial superoxide ***,our findings suggest that these iron-binding ligands play a pivotal role in converting superoxide into hydroxyl radicals by modulating the electron transfer rate between Fe(Ⅲ)/Fe(Ⅱ)and ***,among the tested ligands,only DTPA emerges as a potent promoter of this conversion process when complexed with Fe(Ⅲ).We identify an optimal Fe(Ⅲ)to DTPA ratio of approximately 1:1 for enhancing hydroxyl radical production within the Arthrobacter *** research underscores the efficacy of simultaneously introducing carbon sources and DTPA in facilitating superoxide production and its subsequent conversion to hydroxyl radicals,significantly elevating bioremediation ***,our study reveals that DTPA augments superoxide production in cultures of diverse soils,with various soil microorganisms beyond Arthrobacter identified as contributors to superoxide *** emphasizes the universal applicability of DTPA across multiple bacterial *** conclusion,our study introduces a promising methodology for enhancing microbial superoxide production and its conversion into hydroxyl *** findings hold substantial implications for the deployment of microbial reactive oxygen species in bioremediation,offering innovative solutions for addressing environmental contamination challenges.

关键词： Superoxide Hydroxyl radical Iron-binding ligand Bioremediation DTPA

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Cereal-legume intercropping stimulates straw decomposition and promotes soil organic carbon stability

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Science China Life Sciences 2025年

作者： Wei Wang Meng-Ying Li Qing-Hui Wen Yue Ma Zhi-Ming Zhang Muhammad Maqsood Ur Rehman Fei Mo Hong-Yan Tao Bao-Luo Ma Joann K.Whalen You-Cai Xiong State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems College of Ecology Lanzhou University School of ecology and Environmental Science Yunnan University College of Agronomy Northwest A&F University Ottawa Research and Development Centre Agriculture and Agri-Food Canada Department of Natural Resource Sciences McGill University

Increasing carbon（C） sequestration and stability in agricultural soils is a key strategy to mitigate climate change towards C neutrality. Crop diversification is an initiative to increase C sequestration in fields, but it is unclear how legume-based crop diversification impacts the functional components of soil organic carbon（SOC） in dryland, including the formation and transformation of particulate organic carbon（POC） and mineral-associated organic carbon（MAOC）. We investigated the decomposition of straw residues, the fate of photosynthesized C,as well as the formation of MAOC and POC fractions using an in situ13C labeling technique in the soybean-wheat intercropping, soybeanmaize intercropping and their respective monocropping systems, with and without cover crops. After 4-year treatments, the total SOC content in bulk soil remained unchanged, while MAOC content increased significantly by 5.6% with intercropping. Moreover, the in situ13C labeling results confirmed that more photosynthesized C was transferred to MAOC, and less was retained in the POC fraction. Intercropping significantly increased total soil N and mineral N content by 15.3% and 13.4%, respectively, and decreased soil and microbial C/N ratio by11.3% and 17.4%, respectively. This outcome, therefore, relieved microbial N limitation and accelerated straw residue ***, the potential of MAOC formation was strengthened for better SOC persistence. Our study suggests that legume-based crop diversification can effectively enrich N and support POC transformation to MAOC, accordingly contributing to the persistent SOC pool and thus potentially achieving C neutrality under climate change in dryland agroecosystems.

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Dual-Mode Colorimetric and Fluorescent Detection of Tumor Cells Based on Gold Nanoparticles-Loaded Phosphine Covalent Organic Frameworks

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Journal of Analysis and Testing 2025年第01期 21-31页

作者： Bilian Li Min Zhou Chun Zhao Lin Xiao Tianle Qi Hanbin Xu Linjiang Guo Guobao Ning Xiaokang Lu Keming Zhu Hui Zhao Can-Peng Li School of Chemical Science and Technology Yunnan University Affiliated Hospital of Yunnan University School of Life Science Yunnan University Laboratory for conservation and Utilization of Bioresource Yunnan University

Circulating tumor cells(CTCs) are important markers for cancer. The part of tumor cells that are detached from the primary tumor or metastatic tumor and enter the blood circulation is called CTCs. It is crucial to develop a rapid, accurate, and easy-to-implement diagnostic system for CTCs for early tumor diagnosis and for monitoring progression of the disease. In this work, we reported a colorimetric and fluorescent dual-mode assay for the detection of CTCs. Our assay used magnetic nanoparticles and aptamer for CTCs capture and gold nanoparticles-loaded covalent organic frameworks(Au@COFs) for signal amplification, respectively. The magnetic nanoparticles were modified with folic acid to capture CTCs by interaction between folic acid and the folate receptor overexpressed on the surface of tumor cells. The covalent organic frameworks were engineered to have both nitro-reductase-like and glucose–oxidase-like activities. The nitro-reductase-like activity converted the substrate p-nitrophenol to p-nitroaniline for colorimetric detection, and the glucose-oxidase-like activity enabled fluorescence detection. Specifically, Au@COFs catalyzed glucose oxidation and generated hydrogen peroxide to oxidize Fe 2+to Fe 3+, which converted MIL(Al)-MOF to MIL(Fe)-MOF through ion exchange, resulting in the fluorescence quenching of MIL(Al)-MOF. Our assay showed high sensitivity with a detection limit of 17 cells/mL using MCF-7 cells as model cancer cells. This work provided an e fficient and ultrasensitive strategy for CTCs detection and has potential applications in cancer identification and diagnosis. Dual-mode detection system, combining colorimetric and fluorescent signals, integration of magnetic nanoparticles and aptamers for CTC capture, and utilization of covalent organic frameworks loaded with gold nanoparticles for signal amplification can improve sensitivity and accuracy.

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Predicting the efficiency of arsenic immobilization in soils by biochar using machine learning

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Journal of Environmental Sciences 2025年第1期147卷 259-267页

作者： Jin-Man Cao Yu-Qian Liu Yan-Qing Liu Shu-Dan Xue Hai-Hong Xiong Chong-Lin Xu Qi Xu Gui-Lan Duan State Key Lab of Urban and Regional ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450052China University of Chinese Academy of Sciences Beijing 100049China

Arsenic(As)pollution in soils is a pervasive environmental *** immobilization offers a promising solution for addressing soil As *** efficiency of biochar in immobilizing As in soils primarily hinges on the characteristics of both the soil and the ***,the influence of a specific property on As immobilization varies among different studies,and the development and application of arsenic passivation materials based on biochar often rely on empirical *** enhance immobilization efficiency and reduce labor and time costs,a machine learning(ML)model was employed to predict As immobilization efficiency before biochar *** this study,we collected a dataset comprising 182 data points on As immobilization efficiency from 17 publications to construct three ML *** results demonstrated that the random forest(RF)model outperformed gradient boost regression tree and support vector regression models in predictive *** importance analysis and partial dependence plots based on the RF model were conducted to identify the most crucial factors influencing As *** findings highlighted the significant roles of biochar application time and biochar pH in As immobilization efficiency in ***,the study revealed that Fe-modified biochar exhibited a substantial improvement in As *** insights can facilitate targeted biochar property design and optimization of biochar application conditions to enhance As immobilization efficiency.

关键词： Biochar Arsenic immobilization Soil Machine learning

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Vegetation dynamics at the southern edge of the Siberian mountain taiga

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Journal of Mountain Science 2025年第2期22卷 451-465页

作者： IM Sergei T KHARUK Viacheslav I PETROV Il'ya A SHUSHPANOV Alexander S DVINSKAYA Maria L ONDAR Sergei O V.N.Sukachev Institute of Forest Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of ScienceKrasnoyarsk 660036Russia Institute of ecology and Geography Institute of Space and Information TechnologiesSiberian Federal UniversityKrasnoyarsk 660041Russia Laboratory of Biodiversity and ecology Tomsk State UniversityTomsk 634050Russia Institute of Space Research and High Technologies Reshetnev Siberian State University of Science and TechnologyKrasnoyarsk 660014Russia Department of Biology and ecology Tuvan State UniversityKyzyl 667000Russia

The growth,survival,and mortality of conifer species in response to the hydrothermal regime have received considerable *** is expected that the highest sensitivity of trees to the warming-drying climate will occur mainly at the edges of the species *** focused on the responses to climate change of the drought-resistant larch(Larix sibirica)and the moisture-sensitive Siberian pine(Pinus sibirica)along the elevation gradient in the Tannu-Ola Ridge,the southern margin where those two species coexist in Siberia by using satellite data(MODIS,Landsat,and microwave),the indexes of gross(GPP)and net(NPP)primary productivity,and tree radial growth index(GI).We found that since the warming restart in the 2000s,the area of larch-dominated forests increased by~150%while the area of pine-dominated forests decreased by~10%.The Siberian pine has retreated at low elevations(<1800 m)and increased its area at higher *** contrast,the area of larch stands increased in both the uphill and downhill ***(Betula spp.)also increased its area at low elevations(about+120%).Since 2001,the forested area increased by~5%.A shrubification,i.e.,an increase in the area of shrubs,was observed at high *** uphill rate of timberline and shrubline migration was about 0.3 m/*** the 2000s,vegetation NPP has increased by 13%.A notable correlation between NPP and the GI of larch and pine was found(r=0.5-0.7).At lower elevations,NPP positively correlated with precipitation and soil moisture,while air temperature and VPD(vapor pressure deficit)increase inhibited *** high elevations,the effects of these variables on productivity *** continuous decline of the Siberian pine forest indicates an inevitable retreat of this species at low elevations and its replacement by larch and birch.

关键词： Trees range changes Mountain taiga Siberian larch Siberian pine Timberline Shrubification Tree uphill migration Forest population dynamics Ecological resilience Habitat suitability

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Morphology and phylogeny of two species of Bathypathes from the tropical western Pacific,with description of a new species

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Journal of Oceanology and Limnology 2025年第1期43卷 248-260页

作者： Ting LÜ Zifeng ZHAN Kuidong XU Laboratory of Marine Organism Taxonomy and Phylogeny Qingdao Key Laboratory of Marine Biodiversity and ConservationInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Biology and Biotechnology Laoshan LaboratoryQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

The black coral genus Bathypathes Brook,1889 represents a relatively diverse and ecologically important assemblage comprising the deep-sea hard substrate *** phylogenetic investigations have revealed the polyphyletic nature of Bathypathes,urging further morphological analysis to understand its *** combing morphological and molecular data,we describe Bathypathes multifurcata *** report *** Molodtsova,Opresko&Wagner,2022based on the specimens collected from the tropical western *** phylogenetic topology reconstructed using nuclear ITS1-5.8S-ITS2 and three mitochondrial fragments suggests the separation of Bathypathes into four *** analysis of morphological characters,particularly the colony branch and pinnule patterns also roughly classify Bathypathes into four morphological groups A–*** A is characterized by the unbranched colony and the subopposite arrangement of *** contrast to Group A,Groups B–D have the alternately arranged *** these,Group C exhibits a distinctly long unpinnulated stem compared to Groups B and *** B has unbranched colony,relatively short unpinnulated stem,and spines on pinnules have blunt *** Group D,large colonies(higher than 40 cm)have one or a few branches,small colonies(less than 40 cm)are unbranched,and spines on pinnules have acute *** data particularly those species without sequences are necessary to verify the classification of these groups.

关键词： Antipatharia black coral taxonomy phylogeny seamount western Pacific

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Exploring the HONO source during the COVID-19 pandemic in a megacity in China

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Journal of Environmental Sciences 2025年第3期149卷 616-627页

作者： Mingkai Wang Shenbo Wang Ruiqin Zhang Minghao Yuan Yifei Xu Luqi Shang Xinshuai Song Xinyuan Zhang Yunxiang Zhang School of ecology and Environment Zhengzhou UniversityZhengzhou 450000China Research Institute of Environmental Sciences Zhengzhou UniversityZhengzhou 450000China Zhengzhou Ecological Environment Monitoring Center of Henan Province Zhengzhou 450000China College of Chemistry Zhengzhou UniversityZhengzhou 450000China

HONO is a critical precursor of•OH,but its sources are controversial due to its complex formation *** study conducted comprehensive observations in Zhengzhou from April 26 to May 11,*** NO_(x)concentrations were observed during the Covid epidemic period(EP)(10.4±3.0 ppb),compared to the pre-epidemic period(PEP)(12.5±3.8 ppb).The mean HONO concentration during EP(0.53±0.34 ppb)was 0.09 ppb lower than that during PEP(0.62±0.53 ppb).The decrease in HONO concentration during EP came mainly at night due to the reduction in the direct emission(P_(emi))(0.03 ppb/hr),the homogeneous reaction between•OHandNO(P_(OH+NO))(0.02 ppb/hr),and the heterogeneous conversion of NO_(2)on the ground(0.01 ppb/hr).Notably,there was no significant change in daytime HONO *** daytime HONO budget indicated that the primary HONO sources during PEP were the nitrate photolysis(P_(nitrate)),followed by the P_(OH+NO),Pemi,the photo-enhanced reaction of NO_(2)on the ground(P_(ground+hv))and aerosol surface(Paerosol+hv).The primary HONO sources were Pnitrate,POH+NO,P_(emi),and_(Paerosol+hv)during EP,*** missing source has a high correlation with solar radiation,there might be other photo-related HONO sources or the contributions of photosensitized reactions were *** the extremely underestimated cases,HONO production rates fromthe P_(nitrate),P_(ground+hv),and Paerosol+hv increased by 0.17,0.10,and 0.10 ppb/hr during PEP,0.23,0.13,and 0.16 ppb/hr during EP,and P_(nitrate)was still the primary source during both PEP and EP.

关键词： Nitrous acid Nitrogen oxides COVID-19 HONO budget Unknown sources

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Spatial distribution of display sites of Grey Peacock-pheasant in relation to micro-habitat and predators during the breeding season

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Avian Research 2018年第2期9卷 111-122页

作者： Somying Thunhikorn Matthew J.Grainger Philip J.K.McGowan Tommaso Savini conservation ecology program School of Bioresources and Technology King Mongkut’s University of Technology Thonburi School of Biology Newcastle University

Background： The destruction and fragmentation of forest in Southeast Asia is accelerating biodiversity loss, resulting in a range of management and conservation actions. For some species, a detailed understanding of microhabitat selection is critical for this, especially in the breeding ***： To understand the factors that explain how specific habitats are used by the Grey Peacock-pheasant（Polyplectron bicalcaratum） in the breeding season, we used camera trapping and microhabitat sampling to assess the microhabitat selection of males. We also looked at their interaction with predators in an area of 1200 m × 1200 m at the Hua Kha Khaeng Wildl fe Sanctuary, Tha land, between January and May ***： We show that display scrapes are situated on flatter open areas with small saplings and some vines, typified by low horizontal understory density. We hypothesise that this allows a trade-off between courtship display and the avoidance of predators. Our study showed that the position of Grey Peacock-pheasant display scrapes regularly overlapped with predators within the same microhabitat. We hypothesise that the species＇ behavioural responses to temporal variation in predation risk allows them to avoid most ***： Particular microhabitats are required for Grey Peacock-pheasant *** avoid predators at these places by being active when predators are not.

关键词： Huai Kha Khaeng Wildlife Sanctuary Display scrape Species accumulation Predator-prey Polyplectron bicalcaratum

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