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Manipulated microtopography alters plant community development in fragile farm-pastoral transition zone

Journal of Plant Ecology 2024年第5期17卷 176-188页

作者： Minxuan Gao Yining Wang Yongning Ren Jinyan Zhan Tian Xie School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing Normal UniversityBeijing 100875China Yellow river estuary Wetland ecosystem observation and research station Ministry of EducationDongying 257500China

The ecosystems within agro-pastoral transition zones exhibit inherent fragility and heightened susceptibility to climate variability,exacerbated by profound degradation resulting from anthropogenic *** vegetation degradation in these areas precipitates severe soil erosion,presenting formidable challenges for ecological restoration *** utilization of microtopographic structures to mitigate soil erosion and facilitate vegetation recovery stands as a prominent strategy for vegetation restoration within agro-pastoral transition *** the acknowledgment in current restoration practices that the efficacy of microtopography-based restoration is contingent upon slope,aspect and elevation,there remains a notable absence of precise observed information on this *** study,conducted in the Bashang Grassland,a typical agro-pastoral transition zone in northern China,aims to fill the information gap concerning the correspondence between microtopographic structures and restoration *** findings revealed that microtopography has a significant impact on vegetation characteristics,with outcomes varying by *** slopes displayed higher biomass and density compared with sunny slopes and *** microtopography affected community structure,it did not substantially alter species richness,highlighting the critical role of location and pit construction in successful restoration *** study provides insights for the selection,design and assessment of microtopography-based restoration in vulnerable ecosystems.

关键词： community structure microtopography-based restoration plant diversity plant restoration soil erosion

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Linkages of flow regime and micro-topography:prediction for non-native mangrove invasion under sea-level rise

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ecosystem Health and Sustainability 2020年第1期6卷 462-475,461页

作者： Luzhen Chen Hongyu Feng Xiaoxuan Gu Ying Dong Peng Cheng Xudong Guo Qiulian Lin Ting Tang Yihui Zhang Xudong Zhu Shengchang Yang Key Laboratory of the Ministry of Education for Coastal and Wetland ecosystem College of the Environment and EcologyXiamen UniversityXiamenFujianChina Zhangjiang estuary Mangrove ecosystem observation and research station of Fujian Province Zhangjiang Estuary Mangrove Ecosystem Observation and Research Station of Fujian ProvinceXiamen UniversityXiamenFujianChina State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamenFujianChina

Flow regime is a key driver of invasive aquatic organisms,and the invasiveness of mangrove species may be simultaneously attributed to plant traits and flowing hydrological conditions at the estuary *** focused on hydrological and topographic conditions for a non-native mangrove species,Sonneratia apetala,in Zhangjiang estuary of Fujian,China.A hydrological model and a micro-topographic model were used to predict its dispersal and early establishment,and field surveys and simulated experiments were integrated to estimate its future dispersal *** mesohaline mudflat with a salinity of 8~10 PSU at the mangrove seaward edge was the most likely colonization area for *** under current *** south-western region of the estuary with native mangroves was the most likely area for its colonization according to the unstructured-grid finite-volume community ocean model(FVCOM)in September,when the largest tidal currents within a year and the maximum fruit maturity period *** 42%of the mudflats throughout the whole estuary may be available for seedling establishment under the future sea-level rise RCP 4.5 scenarios compared with 44%for current establishment;however,the RCP 8.5 scenarios would significantly decrease seedling establishment by 2100 due to serious tidal inundation according to the micro-topographical model.

关键词： Mangroves salinity elevation sea-level rise climatic change biological invasion

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Fast spreading of surface ozone in both temporal and spatial scale in pearl river Delta

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Journal of Environmental Sciences 2024年第3期137卷 540-552页

作者： Tianhui Cao Haichao Wang Lei Li Xiao Lu Yiming Liu Shaojia Fan School of Atmospheric Sciences Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Guangdong Provincial observation and research station for Climate Environment and Air Quality Change in the pearl river estuary Key Laboratory of Tropical Atmosphere-Ocean SystemMinistry of EducationZhuhai 519082China

Surface ozone(O_(3))is a major air pollutant and draw increasing attention in the pearl river Delta(PRD),***,we characterize the spatial-temporal variability of ozone based on a dataset obtained from 57 national monitoring sites during *** results show that:(1)the seasonal difference of ozone distribution in the inland and coastal areas was significant,which was largely affected by the wind pattern reversals related to the East Asian monsoon,and local ozone production and destruction;(2)the daily maximum 8hr average(MDA8 O_(3))showed an overall upward trend by 1.11 ppbv/*** the trends in the nine cities varied differently by ranging from-0.12 to 2.51 ppbv/*** hot spots of ozone were spreading to southwestern areas from the central areas since *** ozone is becoming a year-round air pollution problem with the pollution season extending to winter and spring in PRD region.(3)at the central and southwestern PRD cities,the percentage of exceedance days from the continuous type(defined as≥3 days)was ***,the ozone concentration of continuous type was much higher than that of scattered exceedance type(<3 days).In addition,although the occurrence of continuous type starts to decline since2017,the total number of exceedance days during the continuous type is *** results indicate that it is more difficult to eliminate the continuous exceedance than the scatter pollution days and highlight the great challenge in mitigation of O_(3)pollution in these cities.

关键词： Surface ozone pollution Ozone trend Spatial and temporal variability pearl river Delta Pollution mitigation

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Bibliometric Review of Biodiversity Offsetting During 1992-2019

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Chinese Geographical Science 2022年第2期32卷 189-203页

作者： YU Shuling CUI Baoshan XIE Chengjie MAN Ying FU Jing State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China School of Environmental Science and Engineering Tiangong UniversityTianjin 300387China Yellow river estuary Wetland ecosystem observation and research station Ministry of EducationDongying 257500China East China Sea Fisheries research Institute Chinese Academy of Fishery SciencesShanghai 200090China

Biodiversity offsetting plays a crucial role in managing the impacts of development on natural habitats. Developers, conservation groups, governments and financial institutions have used biodiversity offsetting to design measurable conservation actions to compensate for significant residual adverse biodiversity impacts arising from development. However, the concepts and methodologies of biodiversity offsetting have rarely been systematically reviewed, and best practices are still lacking. This hinders the development and applications of this field, and makes it difficult for new researchers to learn, develop, and apply biodiversity offsetting. This paper aims to review research progress on biodiversity offsetting during the period of 1992 to 2019. We mainly used bibliometric analysis and social network analysis methods to expose the topic diversity, development and promotion of this research field, and assess collaboration among biodiversity offsetting scholars. Our research identified 1190 records, and revealed that the total number of publications increased rapidly since 2002. The most productive journal, country, and author were Biological Conservation, USA, and Dr. Maron M of University of Queensland, respectively. Co-author analysis identified that the 23 authors most relevant to biodiversity offsetting were involved in a collaboration network. And they were mainly from 30 countries in a collaboration network, and the authors from USA, Australia and the United Kingdom have the most cooperation, which mainly driven by policy related to biodiversity offsetting. Our review shows that biodiversity offsetting research is at an early stage of rapid development with topically diverse and collaborative science domains. The majority of studies focus on terrestrial environments, which makes the implementation of aquatic ecosystem is more difficult. Theoretical problems and the implications of research evolution and social network in biodiversity offsetting are discussed,

关键词： academic influence biodiversity offsetting compensation bibliometric analysis social network analysis

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A novel herbivorous wood-borer insect outbreak triggers die-offs of a foundation plant species in coastal ecosystems

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ecosystem Health and Sustainability 2020年第1期6卷 39-44,38页

作者： Zhonghua Ning Cong Chen Tian Xie Qing Wang Xu Ma Haochen Sui Baoshan Cui School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing Normal UniversityBeijingChina Yellow river estuary Wetland ecosystem observation and research station Ministry of EducationShandongChina research and Development Center for Watershed Environmental Eco-Engineering Advanced Institute of Natural ScienceBeijing Normal University at ZhuhaiZhuhaiChina

Introduction:Understanding the trophic interactions between plants and herbivorous insects is essential for managing the ecosystem health and sustainability in the context of climate change and anthropogenic *** Tamarix chinensis is a foundation plant species of salt marshes in northern China,which provides a variety of ecological functions and services in coastal ecosystems such as withstanding storm tide,conserving biodiversity,and preventing shoreline ***:However,through long-term field observations,for the first time,we found that the health of this population has been suffering from the potential outbreak of a novel wood-borer insect(Zeuzera leuconotum Butler)under multiple stresses,contributing substantially to the degradation of the coastal salt *** and Conclusion:Therefore,there is urgent need and great significance to investigate the potential impact of this herbivorous wood-borer insects on health and sustainability of plant community in coastal ecosystems for in-depth understanding its degradation mechanisms.

关键词： Die-off foundation species(Tamarix chinensis) insect herbivory wood-borer pest control salt marsh coastal ecosystem

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Capsid protein from red-spotted grouper nervous necrosis virus induces incomplete autophagy by inactivating the HSP90ab1-AKT-MTOR pathway

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Zoological research 2022年第1期43卷 98-110页

作者： Wan-Wan Zhang Peng Jia Xiao-Bing Lu Xiao-Qi Chen Jue-Hua Weng Kun-Tong Jia Mei-Sheng Yi School of Marine Sciences Sun Yat-sen UniversityGuangzhouGuangdong 510000China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiGuangdong 519000China Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering GuangzhouGuangdong 510000China pearl river estuary Marine ecosystem research station Ministry of EducationZhuhaiGuangdong 519000China

As a highly important fish virus,nervous necrosis virus(NNV)has caused severe economic losses to the aquaculture industry ***,an evolutionarily conserved intracellular degradation process,is involved in the pathogenesis of several *** NNV can induce autophagy to facilitate infection in grouper fish spleen cells,how it initiates and mediates autophagy pathways during the initial stage of infection is still ***,we found that red-spotted grouper NNV(RGNNV)induced autophagosome formation in two fish cell lines at 1.5 and 3 h post infection,indicating that autophagy is activated upon entry of ***,autophagic detection showed that RGNNV entry induced incomplete autophagy by impairing the fusion of autophagosomes with *** investigation revealed that binding of the RGNNV capsid protein(CP)to the Lateolabrax japonicus heat shock protein HSP90ab1(LjHSP90ab1),a cell surface receptor of RGNNV,contributed to RGNNV invasion-induced ***,we found that CP blocked the interaction of *** protein kinase B(AKT)with LjHSP90ab1 by competitively binding the NM domain of LjHSP90ab1 to inhibit the AKT-mechanistic target of the rapamycin(MTOR)*** study provides novel insight into the relationship between NNV receptors and autophagy,which may help clarify the pathogenesis of NNV.

关键词： NNV Autophagy CP HSP90ab1 AKT-MTOR pathway

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Atmospheric HONO formation during and after the Spring Festival holidays in a coastal city of China

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Journal of Environmental Sciences 2023年第5期127卷 251-263页

作者： Xue Ni Cuizhi Sun Yongyun Zhang Baoling Liang Shengzhen Zhou Guangdong Lan Jun Zhao School of Atmospheric Sciences Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studiesand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yat-sen UniversityZhuhai 519082China Guangdong Provincial observation and research station for Climate Environment and Air Quality Change in the pearl river estuary Zhuhai 519082China Key Laboratory of Tropical Atmosphere-Ocean System Ministry of EducationZhuhai 519082China

Nitrous acid(HONO)is an important source of hydrogen oxides(HOx),which affects air quality,the atmospheric oxidation capacity,and human ***,we present ambient measurements of the HONO concentrations in Zhuhai,a coastal city in Southern China,from February 7 to March 15,*** campaign was classified into two periods during(P1)and after(P2)the Spring Festival *** average HONO mixing ratio during P2(1.19±0.85 ppbv)was much higher than that during P1(0.24±0.18 ppbv),likely due to the contribution of homogeneous HONO *** nighttime,the heterogeneous conversion rate during P2(0.0089/hr)was considerably higher than that during P1(0.0057/hr),suggesting a higher heterogeneous NO_(2) conversion ***,the heterogeneous NO_(2) conversion was the dominant way during P1 with a high percentage of 88%,while comparable ratios of heterogeneous and homogeneous formation were found(54%vs.46%)during P2,indicating that the homogeneous formation was also important during *** daytime,homogeneous reaction was the major known pathway,with a contribution of 16%during P1 and 27%during P2,leaving large unknown HONO sources which reasonably correlated with the photo-enhanced NO_(2) *** case scenarios were additionally explored,showing that there might be a primary emission source during one scenario(February 17-18)and vehicle emissions might be the major unknown HONO source for another scenario(March 3–5).The results suggest that large unknown daytime sources still exist which need more future ambient and laboratory studies.

关键词： Nitrous acid Nocturnal and daytime budget Heterogeneous conversion Homogeneous formation Coastal area

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Multilocus DNA metabarcoding diet analyses of small cetaceans:a case study on highly vulnerable humpback dolphins and finless porpoises from the pearl river estuary,China

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Integrative Zoology 2023年第1期18卷 183-198页

作者： Xiyang ZHANG Dingyu LUO Ri-Qing YU Yuping WU School of Marine Sciences Zhuhai Key Laboratory of Marine Bioresources and EnvironmentGuangdong Provincial Key Laboratory of Marine Resources and Coastal EngineeringPearl River Estuary Marine Ecosystem Research StationMinistry of EducationSun Yat-sen UniversitySouthern Marine Science and Engineering Guangdong LaboratoryZhuhaiChina Department of Biology Center for EnvironmentBiodiversity and ConservationThe University of Texas at TylerTylerTexasUSA

Accurate diet identiﬁcation of top predators is crucial to fully understand their ecological *** to terrestrial animals,gathering dietary information from cetaceans is notoriously difﬁ***,we applied a multilocus metabarcoding approach to investigate the diet of vulnerable Indo-Paciﬁc humpback dolphins and Indo-Paciﬁcﬁnless porpoises from the pearl river estuary(PRE),*** analyses identiﬁed 21 preyﬁsh species from the 42 humpback dolphin stomachs,as well as 10 species ofﬁsh and 1 species of cephalopod from the 13ﬁnless porpoise *** of the taxa were assigned to the species level,highlighting that the multimarker approach could facilitate species identiﬁ*** of the prey species were small-and medium-sizedﬁshes that primarily fed on *** calculated similarity index revealed a moderated dietary overlap between the 2 cetaceans,presumably due to the feeding of the 2 predators in association withﬁshing vessels in the PRE.A more diverse diet was observed in humpback dolphins in the closedﬁshing season compared to theﬁshing season,implying the inﬂuence on the dolphin diet due to the availability of commercialﬁshery ***,according to the results of species rarefaction curves,ourﬁndings on the feeding habits of the 2 cetaceans are still limited by insufﬁcient sample size and therefore should be interpreted with *** study represents aﬁrst attempt to apply the multilocus DNA metabarcoding technique in the diet analysis of small cetaceans,although more efforts are needed to improve this type of analysis.

关键词： diet species analyses DNA metabarcoding Indo-Paciﬁcﬁnless porpoise Indo-Paciﬁc humpback dolphin pearl river estuary

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Parentage determination of black sea bream(Acanthopagrus schlegelii)for stock enhancement:effectiveness and loss of genetic variation

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Acta Oceanologica Sinica 2021年第6期40卷 41-49页

作者： Binbin Shan Yan Liu Na Song Changping Yang Shengnan Liu Tianxiang Gao Dianrong Sun Key Laboratory of South China Sea Fishery Resources Exploitation&Utilization Ministry of Agriculture Rural AffairsGuangzhou 510300China Guangdong Provincial Key Laboratory of Fishery Ecology and Environment Guangzhou 510300China Scientific observation and research Field station of pearl river estuary ecosystem of Guangdong Province Guangzhou 510300China South China Sea Fisheries research Institute Chinese Academy of Fisheries SciencesGuangzhou 510300China Fishery College Ocean University of ChinaQingdao 266003China Fishery College Zhejiang Ocean UniversityZhoushan 316022China

The stock enhancement programs for black sea bream Acanthopagrus schlegelii have been conducted in China for a ***,little information has been reported concerning the effectiveness and genetic effect of black sea bream stock *** order to detect the contribution of released individuals in Zhujiang river estuary(ZRE)and Daya Bay(DB),six microsatellite markers were used to identify the hatchery-released *** addition,this pedigree of hatchery populations(broodfish and hatchery-released offspring)was traced to detect the number of effective parents(N_(e)),the inbreeding coefficient and the decrease of genetic variability in the *** pedigree reconstruction showed that at least 69(out of 93)broodfish had *** estimated N_(e) was 54.8,consequently the inbreeding coefficient was 0.91%.The genetic diversity of hatchery-released offspring was lower than that in that of broodfish(heterozygosity alleles,0.727-0.774),some alleles(number of alleles,61-69)and genetic variance were lost during *** was observed that wild samples had higher levels of genetic diversity compared with hatchery populations as well as recaptured samples in releasing area.A total of 128 hatchery-released black sea bream were identified among 487 recaptured samples in ZRE,while a total of 15 samples were identified among 96 samples in *** summary,there was a high survival of released fish.N_(e)vertheless,the results provided evidence to consider a loss of genetic variation in hatcheryreleased stock and a negative genetic effect of the stock enhancement.

关键词： Acanthopagrus schlegelii stock enhancement effectiveness microsatellite maker genetic effect pedigree of hatchery populations

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Interannual variability in the sea surface cooling induced by tropical cyclones in the South China Sea

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Acta Oceanologica Sinica 2021年第11期40卷 70-78页

作者： Juan Ouyang Chunhua Qiu Zhenhui Yi Dongxiao Wang Danyi Su Hong Liang Zihao Yang School of Marine Sciences Sun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519020China pearl river estuary Marine ecosystem research station Ministry of EducationZhuhai 519020China Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering Zhuhai 519020China Hydrate Engineering Technology Center China Geological SurveyGuangzhou 510760China

Sea surface cooling induced by tropical cyclones(TCs)is an important component of air-sea *** coordinate transformation and composite analysis methods,we examined the interannual variability in TCinduced sea surface cooling(TCSSC)in the South China Sea(SCS).The frequency of surface cooling cases was over 86%and that of surface warming cases was less than 14%.The magnitude of TCSSC was defined as the absolute value of *** maximum magnitude of TCSSC occurred on the right side of the TC track,and the mean magnitude of TCSSC decreased by 0.04℃/a from 2006 to *** interannual variability in TCSSC was highly correlated with the TC translation speed and pre-TC mixed layer ***,TCSSC got enhanced in El Nino years of 2007,2010,and *** El Nino types were suggested to determine the occurring periods of strong TCSSC via controlling the positions of SCS anticyclones,which brought pre-TC shallow mixed layer and caused strong TCSSC via vertical mixing process during El Nino *** quantify how the anticyclone influences TCSSC,we need to use mixed layer heat balances model in the next study.

关键词： sea surface cooling tropical cyclone El Nino-Southern Oscillation(ENSO) South China Sea anticyclone

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