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Long-term changes in radial growth of seven tree species in the mixed broadleaf-Korean pine forest in Northeast china:Are deciduous trees favored by climate change?

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Journal of forestry Research 2024年第5期35卷 63-77页

作者： Xiufang Gong Danyang Yuan Liangjun Zhu Zongshan Li Xiaochun Wang national engineering laboratory for applied technology of forestry and ecology in south china College of Life Science and TechnologyCentral South University of Forestry and TechnologyChangsha 410004People’s Republic of China Center for Ecological Research and Key laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of ForestryNortheast Forestry UniversityHarbin 150040People’s Republic of China State Key laboratory of Urban and Regional ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085People’s Republic of China

The role of the temperate mixed broadleaf-Korean pine forest(BKF)in global biogeochemical cycles will depend on how the tree species community responds to climate;however,species-specific responses and vulner-abilities of common trees in BKF to extreme climates are poorly *** we used dendrochronological meth-ods to assess radial growth of seven main tree species(Pinus koraiensis,Picea jezoensis,Abies nephrolepis,Fraxinus mandshurica,Phellodendron amurense,Quercus mongolica,and Ulmus davidiana)in an old-growth BKF in response to climate changes in the Xiaoxing’an Mountains and to improve predictions of changes in the tree species *** in most months and winter precipita-tion significantly negatively affected growth of *** and ***,but positively impacted growth of *** and the broadleaf species,especially ***-rica and *** and relative humidity in June significantly positively impacted the growth of most tree *** positive effect of the temperature during the previous non-growing season(PNG)on growth of *** and *** strengthened significantly with rapid warming around 1981,while the impact of PNG temperature on the growth of *** and *** changed from significantly negative to weakly negative or positive at this *** negative response of radial growth of *** and *** to precipitation during the growing season gradually weakened,and the negative response to PNG precipitation was *** the studied species,*** was the most resistant to drought,and *** recovered the best after extreme *** davidiana,*** and *** were more resistant to extreme cold than the other *** warming generally exacerbated the opposite growth patterns of conifer(decline)and broadleaf(increase)*** broadleaf tree species in the old-growth BKF probably will gradually become dominan

关键词： Tree rings Extreme climate Resistance and recovery Broad-leaved and Korean pine mixed forest

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Subtropical forest macro-decomposers rapidly transfer litter carbon and nitrogen into soil mineral-associated organic matter

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Forest Ecosystems 2024年第2期11卷 131-139页

作者： Guoxiang Niu Tao Liu Zhen Zhao Xuebing Zhang Huiling Guan Xiaoxiang He Xiankai Lu national engineering laboratory for applied technology of forestry and ecology in south china Central South University of Forestry and TechnologyChangsha410004China Lushan Botanical Garden Chinese Academy of SciencesJiujiang332900China Key laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of SciencesGuangzhou510650China Section of Microbial ecology Department of BiologyLund UniversityLund22362Sweden Lutou national Station for Scientific Observation and Research of Forest Ecosystem in Hunan Province Yueyang414000China

Background:Forest soils in tropical and subtropical areas store a significant amount of *** framework to assess soil organic matter(SOM)dynamics under evolving global conditions suggest that dividing bulk SOM into particulate and mineral-associated organic matter(POM ***)is a promising method for identifying how SOM contributes to reducing global *** macrofauna,earthworms,and millipedes have been found to play an important role in facilitating SOM ***,how these two co-existing macrofaunae impac the litter decomposition process and directly impact the formation of POM and MAOM remains ***:Here,we set up a microcosm experiment,which consisted of 20 microcosms with four treatments earthworm and litter addition(E),millipedes and litter addition(M),earthworm,millipedes,and litter addition(E+M),and control(only litter addition)in five *** soil and litter were sterilized prior to beginning the incubation experiment to remove any existing *** incubating the samples for 42 days,the litte properties(mass,C,and N contents),soil physicochemical properties,as well as the C and N contents,and POM and MAOM^(13)C abundance in the 0–5 and 5–10 cm soil layers were ***,the relative influences o soil physicochemical and microbial properties on the distribution of C and N in the soil fractions were analyzed Results:The litter mass,C,and N associated with all four treatments significantly decreased after incubation especially under treatment E+M(litter mass:-58.8%,litter C:-57.0%,litter N:-75.1%,respectively),while earthworm biomass significantly decreased under treatment *** or millipede addition alone showed no significant effects on the organic carbon(OC)and total nitrogen(TN)content in the POM fraction,but join addition of both significantly increased OC and TN regardless of soil ***,all three macrofauna treatments increased the OC and TN content and decreased the^(13)C abundance

关键词： Tropical and subtropical forest Soil organic matter fractions Earthworm Millipedes Litter decomposition

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Aboveground carbon sequestration of Cunninghamia lanceolata forests:Magnitude and drivers

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Forest Ecosystems 2024年第1期11卷 32-41页

作者： Chen Wang Shuguang Liu Yu Zhu Andrew R.Smith Ying Ning Deming Deng national engineering laboratory for applied technology of forestry&ecology in south china Central South University of Forestry and TechnologyChangsha 410004China technology Innovation Center for Ecological Conservation and Restoration in Dongting Lake Basin Ministry of Natural ResourcesChangsha 410007China College of Life Science and technology Central South University of Forestry and TechnologyChangsha 410004China School of ecology and Environment Hainan UniversityHaikou 570228China School of Natural Sciences Bangor UniversityGwyneddLL572UWUK College of forestry Central South University of Forestry and TechnologyChangsha 410004China Hunan Prospecting Designing&Research General Institute for Agriculture Forestry&IndustryChangsha 410007China

Understanding the spatial variation,temporal changes,and their underlying driving forces of carbon sequestration in various forests is of great importance for understanding the carbon cycle and carbon management *** carbon density and sequestration in various Cunninghamia lanceolata forests,extensively cultivated for timber production in subtropical china,vary with biodiversity,forest structure,environment,and cultural factors remain poorly explored,presenting a critical knowledge gap for realizing carbon sequestration supply potential through *** on a large-scale database of 449 permanent forest inventory plots,we quantified the spatial-temporal heterogeneity of aboveground carbon densities and carbon accumulation rates in Cunninghamia lanceolate forests in Hunan Province,china,and attributed the contributions of stand structure,environmental,and management factors to the heterogeneity using quantile age-sequence analysis,partial least squares path modeling(PLS-PM),and hot-spot *** results showed lower values of carbon density and sequestration on average,in comparison with other forests in the same climate zone(i.e.,subtropics),with pronounced spatial and temporal ***,quantile regression analysis using carbon accumulation rates along an age sequence showed large differences in carbon sequestration rates among underperformed and outperformed forests(0.50 and 1.80 Mg·ha^(-1)·yr^(-1)).PLS-PM demonstrated that maximum DBH and stand density were the main crucial drivers of aboveground carbon density from young to mature ***,species diversity and geotopographic factors were the significant factors causing the large discrepancy in aboveground carbon density change between low-and high-carbon-bearing *** analysis revealed the importance of culture attributes in shaping the geospatial patterns of carbon *** work highlighted that retaining largesized DBH trees and increasing shade-t

关键词： Carbon density Carbon accumulation rate Forest age Spatial variation Cultural influence

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Interactive effects of soils,local environmental conditions and herbivores on secondary chemicals in tallow tree

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Journal of Plant ecology 2024年第4期17卷 167-180页

作者： Li Xiao Wei Huang Juli Carrillo Jianqing Ding Evan Siemann College of Life and Environmental Science Central South University of Forestry and TechnologyChangsha 410004China national engineering laboratory of applied technology for forestry&ecology in southern china Central South University of Forestry and TechnologyChangsha 410004China CAS Key laboratory of Aquatic Botany and Watershed ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074China Faculty of Land and Food Systems Centre for Sustainable Food SystemsBiodiversity Research CentreUniversity of British ColumbiaVancouver V6T 1Z4Canada State Key laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Biosciences Department Rice UniversityHoustonTX 77005USA

Plants produce secondary chemicals that may vary along with latitude due to changing abiotic and biotic stress gradients and local environmental *** apart the individual and combined effects of these different abiotic,such as soil nutrients,and biotic factors,such as soil biota and herbivores,on secondary chemicals is critical for understanding plant responses to changing *** conducted an experiment at different latitudes in china,using tallow tree(Triadica sebifera)seedlings sourced from a population at 31°*** seedlings were cultivated in gardens located at low,middle and high latitudes,with either local soil or soil from the original seed collection site(origin soil).The seedlings were exposed to natural levels of aboveground herbivores or had them *** secondary chemicals(both foliar and root),aboveground herbivores and soil characteristics were *** showed that most leaf and root secondary metabolites depended on the interaction of the experimental site and soil *** and root phenolic and tannin concentrations were higher at the middle latitude site,especially in the origin *** and foliar flavonoid concentrations increased when aboveground herbivores were *** communities depended strongly on soil *** different responses of tannins versus flavonoids suggest that these two chemical classes differ in their responses to the varying abiotic and biotic factors in these sites along *** together,our results emphasize the importance of considering the interactive effects of local environmental conditions,soil properties and herbivory in regulating plant chemical defenses.

关键词： phenolics tannins flavonoids abiotic factors soil characteristics Triadica sebifera

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Morpho-anatomical adaptations of dominantly grown wild Datura inoxia to wastewater resource:Productivity and ecological issues

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Geoscience Frontiers 2024年第3期15卷 248-258页

作者： Taimoor Hassan Farooq Shagufta Jabeen Awais Shakoor Muhammad Saleem Arif Nadia Siddique Khuram Shahzad Muhammad Umair Riaz Yong Li Bangor College china a Joint Unit of Bangor University and Central South University of Forestry and TechnologyChangsha 410004HunanChina Department of Botany The Islamia University of BahawalpurBahawalpur 63100Pakistan Hawkesbury Institute for the Environment Western Sydney UniversityPenrithNSW 2751Australia Department of Environmental Sciences Government College University FaisalabadFaisalabad 38000Pakistan Department of forestry Rangeand Wildlife ManagementThe Islamia University of BahawalpurBahawalpur 63100Pakistan Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China national engineering laboratory for applied technology of forestry and ecology in south china Central South University of Forestry and TechnologyChangsha 410004HunanChina

With the increasing global water scarcity,wastewater irrigation has become widespread,but it can have detrimental ecological *** wastewater contains valuable nutrients for plants,improper treatment or the use of untreated wastewater in irrigation can negatively impact soil fertility and plant *** study is divided into two parts:firstly,a phytosociological survey was conducted to identify plant species with the highest importance value index(IVI)in the vicinity of wastewaterirrigated ***,a comparative morpho-anatomical analysis was carried out to investigate the morpho-anatomical adaptations of the species with the highest IVI under wastewater irrigation compared to normal water *** results of the phytosociological survey revealed the presence of 51 plant species in the vicinity of the wastewater-irrigated areas,with varying relative densities and *** inoxia exhibited the highest IVI(28.79),followed by Xanthium strumarium(24.34),while Lippia nodiflora showed the lowest IVI(1.86).The morphological growth of *** was superior under normal water irrigation,but the average root length was greater under wastewater *** cell anatomy,cell thickness and cell area characteristics in the dermal,ground,and vascular tissues of the stem and root tended to be greater under wastewater ***,the opposite trend was observed in leaf anatomical analysis,possibly due to the combined effect of wastewater and climatic *** and root xylem thickness were greater under wastewater irrigation,whereas phloem thickness was higher under normal water *** number of vascular bundles in the stem,root,and leaf was higher under wastewater treatment compared to normal water irrigation,but their arrangement was circular in the latter and scattered under wastewater *** inoxia demonstrated strong adaptive potential under wastewater irrigation,as indicated by its highest relative d

关键词： Water pollution Phytosociology Structural growth Phytoremediation Agricultural irrigation Ecological concerns

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Algorithms and statistical analysis for linear structured weighted total least squares problem

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Geodesy and Geodynamics 2024年第2期15卷 177-188页

作者： Jian Xie Tianwei Qiu Cui Zhou Dongfang Lin Sichun Long School of Earth Science and Spatial Information engineering Hunan University of Science and TechnologyXiangtan 411201China College of Science Central South University of Forestry and TechnologyChangsha 410018China national-Local Joint engineering laboratory of Geo-spatial Information technology Hunan University of Science and TechnologyXiangtan 411201China

Weighted total least squares(WTLS)have been regarded as the standard tool for the errors-in-variables(EIV)model in which all the elements in the observation vector and the coefficient matrix are contaminated with random ***,in many geodetic applications,some elements are error-free and some random observations appear repeatedly in different positions in the augmented coefficient *** is called the linear structured EIV(LSEIV)*** kinds of methods are proposed for the LSEIV model from functional and stochastic *** the one hand,the functional part of the LSEIV model is modified into the errors-in-observations(EIO)*** the other hand,the stochastic model is modified by applying the Moore-Penrose inverse of the cofactor *** algorithms are derived through the Lagrange multipliers method and linear *** estimation principles and iterative formula of the parameters are proven to be *** first-order approximate variance-covariance matrix(VCM)of the parameters is also derived.A numerical example is given to compare the performances of our proposed three algorithms with the STLS ***,the least squares(LS),total least squares(TLS)and linear structured weighted total least squares(LSWTLS)solutions are compared and the accuracy evaluation formula is proven to be feasible and ***,the LSWTLS is applied to the field of deformation analysis,which yields a better result than the traditional LS and TLS estimations.

关键词： Linear structured weighted total least squares Errors-in-variables Errors-in-observations Functional modelmodification Stochastic model modification Accuracyevaluation

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Zooplankton community response to eddy during dinoflagellate Noctiluca scintillans blooms off Pakistan,northern Arabian Sea

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Journal of Oceanology and Limnology 2024年第5期42卷 1557-1570页

作者： Mahugnon Boris DEDO Xiping LIAN Kaizhi LI Chenhui XIANG Yehui TAN Key laboratory of Tropical Marine Bioresources and ecology Guangdong Provincial Key Laboratory of Applied Marine BiologySouth China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China Innovation Academy of south china Sea ecology and Environmental engineering Chinese Academy of Sciences(ISEECAS)Guangzhou 510301China southern Marine Science and engineering Guangdong laboratory(Guangzhou) Guangzhou 510301China

Eddies are major elements of ocean dynamics that affect ocean *** their effects on plankton distribution may help understand the dynamics of harmful phytoplankton *** studies on the effects of eddies in the northern Arabian Sea have primarily focused on the zooplankton community,and few have observed zooplankton dynamics during winter blooms of Noctiluca *** investigated zooplankton community structure and the related environmental variability during a *** bloom that was affected by an eddy in February *** sampling stations were deployed at eddy core and eddy edge distinguished in salinity,temperature,and *** show that *** bloomed at the eddy core with high-velocity currents induced by warm eddies that moved from eddy core to eddy *** a result,blooms significantly changed the zooplankton community ***-bloom stations had higher zooplankton diversity than bloom *** at non-bloom stations were dominated by either tunicates or copepods,such as Thalia democratica and Pleuromamma *** addition to the influence of *** blooms,the velocity of eddy currents was a crucial factor on the similarities in the zooplankton community composition between eddy edge and eddy ***,the lower abiotic factors in bloom area contribute to the structuring of the zooplankton community during *** blooms.

关键词： eddy zooplankton community Noctiluca scintillans northern Arabian Sea

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Improved multi-scale inverse bottleneck residual network based on triplet parallel attention for apple leaf disease identification

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Journal of Integrative Agriculture 2024年第3期23卷 901-922页

作者： Lei Tang Jizheng Yi Xiaoyao Li College of Computer&Information engineering Central South University of Forestry and TechnologyChangsha 410004China Yuelushan laboratory Carbon Sinks Forests Variety Innovation Center Changsha 410000China

Accurate diagnosis of apple leaf diseases is crucial for improving the quality of apple production and promoting the development of the apple industry. However, apple leaf diseases do not differ significantly from image texture and structural information. The difficulties in disease feature extraction in complex backgrounds slow the related research progress. To address the problems, this paper proposes an improved multi-scale inverse bottleneck residual network model based on a triplet parallel attention mechanism, which is built upon ResNet-50, while improving and combining the inception module and ResNext inverse bottleneck blocks, to recognize seven types of apple leaf(including six diseases of alternaria leaf spot, brown spot, grey spot, mosaic, rust, scab, and one healthy). First, the 3×3 convolutions in some of the residual modules are replaced by multi-scale residual convolutions, the convolution kernels of different sizes contained in each branch of the multi-scale convolution are applied to extract feature maps of different sizes, and the outputs of these branches are multi-scale fused by summing to enrich the output features of the images. Second, the global layer-wise dynamic coordinated inverse bottleneck structure is used to reduce the network feature loss. The inverse bottleneck structure makes the image information less lossy when transforming from different dimensional feature spaces. The fusion of multi-scale and layer-wise dynamic coordinated inverse bottlenecks makes the model effectively balances computational efficiency and feature representation capability, and more robust with a combination of horizontal and vertical features in the fine identification of apple leaf diseases. Finally, after each improved module, a triplet parallel attention module is integrated with cross-dimensional interactions among channels through rotations and residual transformations, which improves the parallel search efficiency of important features and the recogniti

关键词： multi-scale module inverse bottleneck structure triplet parallel attention apple leaf disease

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Analyzing the spatiotemporal evolution and driving forces of gross ecosystem product in the upper reaches of the Chaobai River Basin

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Frontiers of Environmental Science & engineering 2024年第8期18卷 117-132页

作者： Jiacheng Li Qi Han Liqiu Zhang Li Feng Guihuan Liu Beijing Key laboratory for Source Control technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China engineering Research Center for Water Pollution Source Control&Eco-remediation College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Center of Eco-compensation Chinese Academy of Environmental PlanningMinistry of Ecology of EnvironmentBeijing 100041China

The Chaobai River Basin,which is a crucial ecological barrier and primary water source area within the Beijing-Tianjin-Hebei region,possesses substantial ecological *** gross ecosystem product(GEP)in the Chaobai River Basin is a reflection of ecosystem conditions and quantifies nature’s contributions to humanity,which provides a basis for basin ecosystem service management and *** study investigated the spatiotemporal evolution of GEP in the upper Chaobai River Basin and explored the driving factors influencing GEP spatial *** patterns from 2005 to 2020 were analyzed,and GEP was calculated for 2005,2010,2015,and *** driving factors influencing GEP spatial differentiation were identified using the optimal parameter-based geographical detector(OPGD)*** key findings are as follows:(1)From 2005 to 2020,the main ecosystem types were forest,grassland,and *** areas experienced significant changes,and conversions mainly occurred among urban,water,grassland and agricultural ecosystems.(2)Temporally,the GEP in the basin increased from 2005 to 2020,with regulation services *** the county(district)scale,GEP exhibited a north-west-high and south-east-low pattern,showing spatial differences between per-unit-area GEP and county(district)GEP,while the spatial variations in per capita GEP and county(district)GEP were similar.(3)Differences in the spatial distribution of GEP were influenced by regional natural geographical and socioeconomic *** these factors,gross domestic product,population density,and land-use degree density contributed *** among different driving forces noticeably impacted GEP spatial *** findings underscore the necessity of incorporating factors such as population density and the intensity of land-use development into ecosystem management decision-making processes in the upper reaches of the Chaobai River *** policies

关键词： Ecosystem pattern Gross ecosystem product(GEP) Spatiotemporal evolution Optimal parameter-based geographical detector(OPGD) Chaobai River Basin

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Linking coral fluorescence phenotypes to thermal bleaching in the reef-building Galaxea fascicularis from the northern south china Sea

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Marine Life Science & technology 2024年第1期6卷 155-167页

作者： Sanqiang Gong Jiayuan Liang Gang Li Lijia Xu Yehui Tan Xinqing Zheng Xuejie Jin Kefu Yu Xiaomin Xia Key laboratory of Tropical Marine Bio-Resources and ecology&Guangdong Provincial Key laboratory of applied Marine Biology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China southern Marine Science and engineering Guangdong laboratory(Guangzhou) Guangzhou 510301China Coral Reef Research Center of china Guangxi UniversityNanning 53004China south china Institute of Environmental Sciences The Ministry of Ecology and Environment of PRCGuangzhou 510530China Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China

Coral fluorescence phenotypes have been suggested as an adaptation to a broad range of environmental conditions,yet the mechanisms linking thermal bleaching tolerance in reef-building coral populations,associated with fluorescence phenotypes due to GFP-like proteins,remains *** this study,the relationship between the thermal sensitivity and phenotypic plasticity of corals was investigated using two phenotypes of Galaxea fascicularis,green and *** results reveal that brown *** was more susceptible to bleaching than green *** when exposed to a higher growth temperature of 32℃.Both phenotypes of *** were associated with the thermotolerant Symbiodiniaceae symbiont,Durusdinium ***,the brown *** showed a significant decrease in Symbiodiniaceae cell density and a significant increase in pathogenic bacteria abundance when the growth temperature was raised from 29 to 32℃.The physiological traits and transcriptomic profiles of Symbiodiniaceae were not notably affected,but there were differences in the transcriptional levels of certain genes between the two phenotype hosts of *** heat stress of 32℃,the gene encoding green fluorescent protein(GFP)-like and chromosome-associated proteins,as well as genes related to oxidative phosphorylation,cell growth and death showed lower transcriptional levels in the brown *** compared to the green ***,the results demonstrate that the green form of *** is better able to tolerate ocean warming and defend against pathogenic bacteria,likely due to higher gene transcription levels and defense ability.

关键词： Fluorescence phenotype Thermal bleaching Microbiome Galaxea fascicularis Ocean warming

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