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Overview of the distribution and adaptation of a bloom-forming cyanobacterium Raphidiopsis raciborskii:integrating genomics,toxicity,and ecophysiology

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Journal of Oceanology and Limnology 2022年第5期40卷 1774-1791页

作者： Zhongxing WU Songqi YANG Junqiong SHI Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education) Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir RegionSchool of Life SciencesSouthwest UniversityChongqing 400715China

Raphidiopsis raciborskii is a notorious bloom-forming and filamentous cyanobacterium that has been extensively investigated into its toxicity,phylogeny,and spreading *** have demonstrated that this species has spanned different climates from tropical zones to temperate regions,suggesting that *** is becoming a cosmopolitan species in freshwater systems around the *** fact,it has been proposed that several characteristics of *** may explain its spread and *** particular,*** is known to display a high extent of physiological plasticity regarding nutrients,light regimes,and te mperature ***,this species illustrates different ecotype s with distinct environmental ***,we present an overview of ***’s global distribution and adaptation strategy based on the recent findings from genome variance,toxicity,and *** expansion of its geographical distribution can be linked to its genome,toxicity,and *** variable genes are mainly associated with the stress response,phage defense,DNA repair,cell cycle control,and membrane transport,illustrating the species’adaptability in response to changing *** fact,the species shows rapid adaptability to low and/or variable nutrient availability,especially changing phosphorus ***,the variabilities of strains within the population extend their flexibility to adapt and acclimate to ambient *** addition,cylindrospermopsins(CYN)appear to have a potential biological role in facilitating theirs dominance or *** strategies of *** make it a challenge to manage in a fre shwater system,reflecting the management of its bloom from further evidence of the complex ecophysiology,toxicity,and genome of this species.

关键词： distribution ecophysiology genome variance Raphidiopsis raciborskii toxicity

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From ecophysiology to cultivation methodology:filling the knowledge gap between uncultured and cultured microbes

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Marine Life Science & Technology 2021年第2期3卷 132-147页

作者： Nimaichand Salam Wen-Dong Xian Mipeshwaree Devi Asem Min Xiao Wen-Jun Li State Key Laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Sciences and Engineering Guangdong Laboratory(Zhuhai)School of Life Science and School of EcologySun Yat-Sen UniversityGuangzhou510275China State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi830011China

Earth is dominated by a myriad of microbial communities,but the majority fails to grow under in situ laboratory *** basic cause of unculturability is that bacteria dominantly occur as biofilms in natural *** improvements in the culture techniques are mostly done by optimizing media ***,with technological advancement particularly in the field of genome sequencing and cell imagining techniques,new tools have become available to understand the ecophysiology of microbial ***,it becomes easier to mimic environmental conditions in the culture *** methods include co-culturing,emendation of growth factors,and cultivation after physical cell *** recently,techniques have been proposed for bacterial cultivation by employing genomic data to understand either microbial interactions(network-directed targeted bacterial isolation)or ecosystem engineering(reverse genomics).Hopefully,these techniques may be applied to almost all environmental samples,and help fill the gaps between the cultured and uncultured microbial communities.

关键词： Biofilms ecophysiology Unculturability Co-occurrence network Reverse genomics

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Soil resource availability and its effect on the ecophysiology and establishment of Stipa pulchra

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Journal of Plant Ecology 2019年第4期12卷 603-614页

作者： Robert L.Fitch Erin J.Questad Edward G.Bobich Department of Biological Sciences California State Polytechnic UniversityPomona3801 West Temple Avenue PomonaCA 91768USA

Aims The objectives of this study were to(i)determine the importance of soil moisture and soil nitrogen availability as resource requirements for the establishment of Stipa pulchra,(ii)to examine how changes in slope within a local habitat can affect the accumulation of soil moisture and soil nitrogen and(iii)to measure the physiological re-sponses of *** among such slope *** The field experiment occurred in the San JoséHills of Southern California on the California State Polytechnic University,Pomona *** were established within three different slope loca-tions(shallow,moderate and steep)within four separate *** nitrogen treatments(ambient,addition and removal)were replicated within each slope location for all four canyons,and five *** plants were planted in each *** nitrogen accumula-tion and soil moisture,as well as other abiotic variables,were meas-ured across the varied slope locations and nitrogen *** measured the cover,stress,and reproduction of *** plants for 2 years and used a mesocosm experiment to determine how ***-chra responds to varying water and nitrogen *** Findings Stipa pulchra had a strong positive response to the wettest watering treatment and a weak response to nitrogen addition in the meso-cosm *** the field experiment,*** responded positively in moderate slope locations and did not respond to ni-trogen treatments,possibly due to *** patterns of soil moisture were driven by slope,soil compaction and solar *** nitrogen accumulation did not vary among slope *** restoration of ***,priority should be placed on managing soil moisture availability and determining suitable edaphic factors.

关键词： establishment ecophysiology slope soil moisture soil properties nitrogen deposition

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ecophysiology of Lake Kinneret (Israel) Zooplankton

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Open Journal of Ecology 2015年第5期5卷 187-198页

作者： Moshe Gophen Migal-Scientific Research Institute Kiryat Shmone Israel

A summary of a long-term research of Lake Kinneret zooplankton distribution is presented. During 1969-2002 several prominent changes have been recorded in the Kinneret ecosystem. This paper is an attempt aimed at analyzing the impact of these ecological changes on the zooplankton communities. The impacts of Phytoplankton, Bacteria, Protozoa, Temperature, Nutrient composition and fish predation on zooplankton dynamics are analyzed. It was found that periodical fluctuations of zooplankton density were mostly affected by fish predation as well as by temperature increase and food availability. Ecological conditions in Lake Kinneret have been modified since early 1990’s and the new conditions were consequently accompanied by zooplankton Homeostatic response. Moreover, as a result of the ecological changes fish intensified their pressure on zoo-plankton. The flexibility of food resource preference by zooplankton enabled its existence but fish predation predominantly controlled their density.

关键词： Kinneret Zooplankton ecophysiology Food-Web

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Stress-Tolerant Cassava: The Role of Integrative ecophysiology-Breeding Research in Crop Improvement

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Open Journal of Soil Science 2012年第2期2卷 162-186页

作者： Mabrouk A. El-Sharkawy Centro Internacional de Agricultura Tropical (CIAT) Cali Colombia.

This review highlights an integrative multidisciplinary eco-physiological, breeding and agronomical research on the tropical starchy root crop cassava conducted at CIAT. Laboratory and field studies have elucidated several physio-logical/biochemical mechanisms and plant traits underlying the high productivity in favorable conditions and tolerance to stressful environments, such as prolonged water stress and marginal low-fertility soils. Cassava is endowed with inherent high photosynthetic capacity expressed in near optimal environments that correlates with biological produc- tivity across environments and wide range of ***-measured photosynthetic rates were also associated with root yield, particularly under prolonged drought. Extensive rooting systems and stomatal sensitivity to both atmospheric humidity and soil water shortages underlie tolerance to drought. The C4 phosphoenolpyruvate carboxylase (PEPC) was associated with photosynthesis and yield making it a selectable trait, along with leaf duration, particularly for stressful environments. Germplasm from the core collection was screened for tolerance to soils low in P and K, resulting in the identification of several accessions with good levels of tolerance. Cassava has a comparative advantage against major tropical food and energy crops in terms of biological productivity. Results also point to the importance of field research versus greenhouse or growth-chamber studies. In globally warming climate,the crop is predicted to play more role in tropical and subtropical agro-ecosystems. More research is needed under tropical field conditions to understand the interactive responses to elevated carbon dioxide, temperature, soil fertility, and plant water relations.

关键词： Abiotic Stress Agriculture Breeding Climate Change Cultivars Drought ecophysiology Food Security Modeling Nutrients Photosynthesis Productivity Semiarid Soils Storage Roots Water Stress Yield

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Species divergence in seedling leaf traits and tree growth response to nitrogen and phosphorus additions in an evergreen broadleaved forest of subtropical China

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Journal of Forestry Research 2023年第1期34卷 137-150页

作者： Xuemin Ye Wensheng Bu Xiaofei Hu Bin Liu Kuan Liang Fusheng Chen Key Laboratory of National Forestry and Grassland Administration On Forest Ecosystem Protection and Restoration of Poyang Lake Watershed Jiangxi Agricultural UniversityNanchang 330045People’s Republic of China Jiangxi Provincial Key Laboratory of Silviculture College of ForestryJiangxi Agricultural UniversityNanchang 330045People’s Republic of China School of Management Nanchang UniversityNanchang 330045People’s Republic of China

Tree competitiveness generally depends on trait plasticity in response to environmental *** effects of nitrogen(N)and phosphorus(P)on leaf trait variability by species is poorly understood,especially in China’s subtropical *** study examined the seedling leaf traits and net primary productivity of all trees>5 cm DBH of two dominant species,Schima superba and Castanopsis carlesii,in an evergreen broadleaved forest fertilized with nitrogen(+N),phosphorus(+P),and nitrogen plus phosphorus(N+P).The effect of N on seedling leaf traits was stronger than P,while fertilization in general was species *** mass per unit area decreased with N for *** seedlings but not for *** N,P,and N/P ratios changed with N addition for both *** four N fractions of carboxylation,bioenergetics,cell wall,and other N metabolites in *** leaves responded significantly to fertilization,while only the cell wall in *** a leaves *** leaf functional traits,including light-saturated photosynthetic rates,water,N,and P use efficiencies,chlorophyll and non structural carbohydrate contents increased with N addition in *** a and by P addition in *** closure at the stand-level increased due to *** biomass and relative growth rate of *** a was not affected by any treatments,while both for *** significantly decreased with N+P ***,nutrient limitation may vary at a small scale among species in a subtropical forest based on their responses of seedling traits and net primary productivity to *** traits are not correlated with the net primary productivity of larger trees except for N fractions,because low light conditions induced by fertilization reduces the proportion of N allocated to photosynthesis in *** addition,acclimation differences of tree species may increase the uncertainty of community succession.

关键词： ecophysiology Fertilization acclimation N fractions Nutrient limitation Photosynthesis Relative growth rate

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Effect of applying a calcined kaolin-based particle film on the photosynthetic capacity and growth of young eucalyptus plants

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Journal of Forestry Research 2021年第6期32卷 2473-2484页

作者： Diego Pereira Santos Mauriana da Rocha Sobrinho Maria de Fatima de Castro Oliveira Niedja Bezerra Costa Tiago Massi Ferraz Fabricio de Oliveira Reis Heder Braum Eliemar Campostrini Fabio Afonso Mazzei Moura de Assis Figueiredo Graduate Program in Agriculture and Environment State University of MaranhaoPraca Goncalves Diass/nCentroBalsasMA 65800-000Brazil Graduate Program in Agroecology State University of MaranhaoAv.Lourenco Vieira da Silva1000Jardim Sao CristovaoSao LuisMA 65055-310Brazil Graduate Program in Agronomy Campus SamambaiaEscola de AgronomiaFederal University of GoiasAv.Esperanca s/nGoianiaGO 74690-900Brazil State University of Maranhao Av.Lourenco Vieira da Silva1000Jardim Sao CristovaoSao LuisMA 65055-310Brazil Northern Rio de Janeiro State University Av.Alberto Lamego2000Campos dos GoytacazesRJ 28013-602Brazil

In scenarios of climatic change when increased global temperatures can be expected,it is essential to search for technologies that favor sapling survival and growth after planting and increase yield in the ***-based particle films(KBPF)have been applied as barriers against the deleterious effects of high levels of solar *** objective of the present study was to assess the effects of applying purified calcined kaolin-based particle film to young eucalyptus *** treatments were carried out:0%(just water),3%,5%,7%,and 10%calcined kaolin applied to the adaxial part of the leaves.A complete randomized block design was used with five treatments and ten *** plants were assessed for height,diameter at ground level,gas exchanges(net photosynthetic CO_(2) assimilation,stomatal conductance and transpiration),instantaneous(WUE)and intrinsic water use efficiency(IWUE),chlorophyll a fluorescence(maximum quantum yield of photosystem II(PSII)(Fv/Fm),concentration of active reaction centers in relation to the quantity of photons absorbed(RC/ABS)and the maximum ratio of quantum yields of photochemical and concurrent non-photochemical processes in PSII(Fv/F0),SPAD reading and leaf *** 3%KBPF concentration showed the best responses in biometric assessments 80 days after planting(DAP)and were corroborated by the responses of the leaf,stem and shoot dry matter production as a *** leaf ontogeny assessments showed positive responses following KBPF application when considering leaf development,with 7%KBPF concentration resulting in the highest mean *** mean specific leaf mass had negative response to high KBPF *** 60 DAP,the gas exchange variables during both assessment periods declined with an increase in KBPF *** differences as a result of KBPF applications were found only at the start of the assessments(34 DAP)for both WUE and for ***‘greenness’(SPAD reading)at 47 days showed a quadratic

关键词： ecophysiology Photoprotection Yield Silviculture

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Dim artificial light at night reduces the cellular immune response of the black field cricket, Teleogryllus commodus

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Insect Science 2020年第3期27卷 571-582页

作者： Joanna Durrant Mark P.Green Theresa M.Jones The School of BioSciences Faculty of ScienceUniversity of MelbourneVictoria3010Australia

A functioning immune system is crucial for protection against disease and illness,yet increasing evidence suggests that species living in urban areas could be suffering from immune suppression,due to the presence of artificial light at night(ALAN).This study examined the effects of ecologically relevant levels of ALAN on three key measures of immune function(haemocyte concentration,lytic activity,and phenoloxidase activity)using a model invertebrate species,the Australian black field cricket,Teleogryllus *** reared crickets under an ecologically relevant daily light‐cycle consisting of 12 hr bright daylight(2600 lx)followed by either 12 h darkness(0 lx)or dim environmentally relevant ALAN(1,10,100 lx),and then assessed immune function at multiple time points throughout adult life using haemolymph *** found that the presence of ALAN had a clear negative effect on haemocytes,while the effects on lytic activity and phenoloxidase activity were more complex or largely unaffected by ***,the effects of lifelong exposure to ALAN of 1 lx were comparable to those of 10 and 100 *** data suggest that the effects of ALAN could be large and widespread,and such reductions in the core immune response of individuals will likely have greater consequences for fitness and survival under more malign conditions,such as those of the natural environment.

关键词： circadian rhythm ecophysiology immune function immunomodulation invertebrate light pollution melatonin urbanization

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Photosynthetic response to a winter heatwave in leading and trailing edge populations of the intertidal red alga Corallina offi-cinalis(Rhodophyta)

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Acta Oceanologica Sinica 2024年第7期43卷 70-77页

作者： Regina Kolzenburg Federica Ragazzola Laura Tamburello Katy R.Nicastro Christopher D.McQuaid Gerardo I.Zardi UmeåMarine Sciences Centre UmeåUniversity90571 NorrbynSweden University of Portsmouth Institute of Marine SciencePortsmouth PO49LYUK Stazione Zoologica Anton Dohrn Genova Marine CenterGenova 16126Italy Stazione Zoologica Anton Dohrn Sicily Marine CenterPalermo 90149Italy Department of Zoology and Entomology Rhodes UniversityMakhanda(Grahamstown)6139South Africa Centre of Marine Sciences University of AlgarveFaro 8005-139Portugal Laboratoire d’Océanologie et de Géosciences Universitéde LilleLille 59000France Universitéde Caen Normandie Laboratoire de Biologie des Organismes et des Ecosystèmes AquatiquesCaen 14032France

Marine heatwaves(MHWs)caused by anthropogenic climate change are becoming a key driver of change at the ecosystem *** conditions experienced by marine organisms across their distribution,particularly towards the equator,are likely to approach their physiological limits,resulting in extensive mortality and subsequent changes at the population *** at the margins of their species’distribution are thought to be more sensitive to climate-induced environmental pressures than central populations,but our understanding of variability in fitness-related physiological traits in trailing versus leading-edge populations is *** a laboratory simulation study,we tested whether two leading(Iceland)and two trailing(Spain)peripheral populations of the intertidal macroalga Corallina officinalis display different levels of maximum potential quantum efficiency(Fv/Fm)resilience to current and future winter MHWs *** study revealed that ongoing and future local winter MHWs will not negatively affect leading-edge populations of ***,which exhibited stable photosynthetic efficiency throughout the *** edge populations showed a positive though non-significant trend in photosynthetic efficiency throughout winter MHWs *** and equatorward populations did not produce significantly different results,with winter MHWs having no negative affect on Fv/Fm of either ***,we found no long-term regional or population-level influence of a winter MHWs on this species’photosynthetic ***,we found no statistically significant difference in thermal stress responses between leading and trailing ***,*** showed a trend towards higher stress responses in southern than northern *** responses rest on a variety of local population traits,they are difficult to predict based solely on thermal pressures.

关键词： marginal population coralline algae climate change ecophysiology photophysiology macroalgae Fv/Fm

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The effect of fasting and body reserves on cola tolerance in 2 pit-building insect predators

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Current Zoology 2017年第3期63卷 287-294页

作者： Inon SCHARF Alma DANIEL Heath Andrew MACMILLAN Noa KATZ Department of Zoology Faculty of Life Sciences Tel Aviv University POB 39040 69978 Tel Aviv Israel Department of Biology York University 4700 Keele St. Toronto Ontario Canada

Pit-building antlions and wormlions are 2 distantly-related insect species, whose larvae construct pits in loose soil to trap small arthropod prey. This convergent evolution of natural histories has led to additional similarities in their natural history and ecology, and thus, these 2 species encounter similar abiotic stress （such as periodic starvation） in their natural habitat. Here, we measured the cold tolerance of the 2 species and examined whether recent feeding or food deprivation, as well as body composition （body mass and lipid content） and condition （quantified as mass-to-size residuals） affect their cold tolerance. In contrast to other insects, in which food deprivation either enhanced or impaired cold tolerance, prolonged fasting had no effect on the cold tolerance of either species, which had similar cold tolerance. The 2 species differed, however, in how cold tolerance related to body mass and lipid content： although body mass was positively correlated with the wormlion cold tolerance, lipid content was a more reliable predictor of cold tolerance in the antlions. Cold tolerance also underwent greater change with ontogeny in wormlions than in antlions. We discuss possible reasons for this lack of effect of food deprivation on both species＇ cold tolerance, such as their high starvation tolerance （being sit-and-wait predators）.

关键词： chill coma deprivation ecophysiology fat content food hunger morphometrics Myrmeleontidae Vermileonidae.

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