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Environmental factors regulating cyanobacteria dominance and microcystin production in a subtropical lake within the Taihu watershed,China

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第4期13卷 311-322页

作者： Wan-min NI Jian-ying ZHANG Teng-da DING R.Jan stevenson Yin-mei ZHU Institute of Environmental Science Zhejiang University Hangzhou 310058China Zhejiang Provincial key Laboratory of Organic Pollution Process and Control Hangzhou 310058China Center for Water Sciences Michigan State UniversityEast LansingM148824.USA

Understanding the pattern ofphytoplankton and their dependence on water quality variables, can help the management of eutrophic lakes. The aim of this study was to determine water quality and environmental factors associated with cyanobacteria dominance and microcystin production in Qingshan Lake, a subtropical lake located in the headwater of the Taihu watershed, China. Water samples collected monthly from 10 study sites in Qingshan Lake were analyzed for the species distributions of freshwater algae and physico-chemical parameters including total nitrogen （TN）, ammonia （NH4＋-N）, nitrate （NO3--N）, total phosphorus （TP）, and chlorophyll a （Chl-a） from June, 2008 to May, 2009. Qingshan Lake was found to be eutrophic, based on the calculated trophic state index （TSI）. The average TN of 4.33 mg/L during the study period exceeded the Surface Water Quality Standards of China. TP was significantly correlated with relative abundance of cyanobacteria and Microeystis biovolume, indi- cating its important role in regulating cyanobacteria. Microcystis, Anabaena, and Oscillatoria were dominant cyanobacteria in Qingshan Lake from June to November, 2008. Cyanobacteria dominance was regulated by water temperature and TE Principal component analysis further indicated that microcystin production was most affected by water temperature, TP, and cyanobacteria biomass. Results suggest that the control of TP in summer can mitigate cyanobacteria dominance and microcystin production in Qingshan Lake, and close monitoring should be undertaken in summer.

关键词： cyanobacteria Microcystins Eutrophication Water quality Taihu watershed

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Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott k. Abeling N.J. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.V. Addepalli M.J. Addison J. Adelman A. Adiguzel T. Adye A.A. Affolder Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot M. Ait Tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik T.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar k. Al khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alhroob B. Ali H.M.J. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos k.R. Amos V. Ananiev C. Anastopoulos T. Andeen J.k. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki J.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada k. Asai S. Asai N.A. Asbah J. Assahsah k. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani P.A. Atmasiddha k. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio k. Axiotis G. Azuelos D. Babal H. Bachacou k. Bachas A. Bachiu F. Backman A. Badea P. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.T. Baines L. Baines O.k. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Baldin P. Balek E. Ballabene F. Balli L.M. Baltes W.k. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak M. Barakat E.L. Barberio D. Barberis M. Barbero M.Z. Barel k.N. Barends T. Barillari M-S. Barisits T. Barklow P. Baron D.A. Baron Mo The ATLAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large Hadron Collider,as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the measurement of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points.

关键词： ATLAS JET QUARk GLUON TAGGING

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Assemblage-based biomonitoring of freshwater ecosystem health via multimetric indices:A critical review and suggestions for improving their applicability

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Water Biology and Security 2022年第3期1卷 28-42页

作者： Robert L.Vadas Jr. Robert M.Hughes Yeon Jae Bae Min Jeong Baek Orestes Carlos Bello Gonzáles Marcos Callisto Débora ReisdeCarvalho kai Chen Maria T.Ferreira Pablo Fierro Jon S.Harding dana M.Infante C.J.kleynhans Diego R.Macedo Isabela Martins Norman Mercado Silva Nabor Moya Susan J.Nichols Paulo S.Pompeu Renata Ruaro Deborah R.O.Silva R.Jan stevenson Bianca de Freitas Terra Christa Thirion Douglas Ticiani Lizhu Wang Chris O.Yoder 2909 Boulevard Rd SEOlympiaWA98501-3971USA Amnis Opes Institute 2895 SE GlennCorvallisOR97333USA Department of Fisheries Wildlife&Conservation SciencesOregon State UniversityCorvallisOR97331USA Division of Environmental Science&Ecological Engineering Korea University145 Anam-roSeongbuk-guSeoul02841South Korea National Institute of Biological Resources Ministry of Environment42 Hwangyeong-roSeo-guIncheon22689South Korea Centro de Investigacion en Biodiversidad y Conservacion Universidad Autonoma del Estado de Morelos1001Col.ChamilpaC.P62209CuernavacaMorelosMexico Departamento de Genética Ecologia e EvoluçaoInstituto de Ciências BiologicaUniversidade Federal de Minas GeraisAvenida Ant^onio Carlos 6627CEP31270-901Belo HorizonteMGBrazil Departamento de Ecologia e Conservaçao Universidade Federal de Lavras37200-900LavrasMGBrazil State key Laboratory of Marine Resource Utiliization in South China Sea Hainan UniversityHaikou570228China Forest Research Centre&Associate Laboratory TERRA University of LisbonTapada da Ajuda1349-017LisbonPortugal Instituto de Ciencias Marinas y Limnologicas Universidad Austral de ChileValdiviaChile School of Biological Sciences University of CanterburyPrivate Bag 4800Christchurch8140New Zealand Department of Fisheries&Wildlife Michigan State University1405 South Harrison Road#318East LansingMI48823USA Department of Water Affairs and Forestry(retired) 8th Avenue 771Wonderboom South0084PretoriaSouth Africa Departamento de Geografia Instituto de GeociênciasUniversidade Federal de Minas GeraisAvenida Antônio Carlos 6627CEP31270-901Belo HorizonteMGBrazil Instituto Guaicuy 109 Rua BrasopolisBelo HorizonteMG31150-170Brazil Centro de Investigación en Biodiversidad y Conservación Universidad Autónoma del Estado de MorelosAvenida Universidad 1001Col.ChamilpaC.P.62209CuernavacaMorelosMexico Instituto Experimental de Biología Universidad San Francisco Xavier de ChuquisacaSucreBolivia Centre for Applied Water Science Un

Freshwater biota are more comprehensive and direct indicators of biological impacts,and more meaningful to the public than water quality or physical habitat *** biotic data and the multiple biological indicators developed from them offer a much richer array of data for assessing the impacts of pollution controls than a limited set of physical or chemical *** recent decades,assemblage-based assessments by ecologists,environmental scientists,and water quality agencies have been employed globally for determining the condition of,and threats to,freshwater ecosystems.A key step in this advance has been the development of multimetric indices(MMIs)or indices of biotic integrity(IBIs)based on quantitative assessments of algae,macrophyte,macroinvertebrate,fish or riparian bird *** Europe,where biological assemblages are mandated for assessing freshwater ecosystem health,many indices are ***,the proliferation of MMIs globally has not always occurred through the application of rigorous study designs and monitoring protocols,nor have they always effectively incorporated functional metrics,stressor assessments,and statistical ***,in this review,we discuss eleven major concerns with the development and application(including logistical limitations)of multimetric indicators based on freshwater biota to encourage more rigorous and widely applicable(transferable)MMI use and ***,our concerns focus on reference conditions;sampling effort,methods,and season;trophic guild definition;metric comprehensiveness,options,screening and scoring;and MMI *** could also benefit from increased attention to ecological mechanisms and metric development,to further improve our understanding of anthropogenic impacts as well as rehabilitation effects on freshwater ecosystems *** closer attention to study designs,ecological mechanisms and metric development should further improve our understa

关键词： IBI MMI Fish Macroinvertebrates Algae Streams Rivers Lakes Wetlands Biological monitoring

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斯蒂文森的苏格兰散文特点分析

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北京理工大学学报（社会科学版） 2004年第Z1期6卷 3-5页

作者：陈军营陈大明北京理工大学北京100081

罗伯特·路易斯·斯蒂文森是19世纪末新浪漫主义文学的代表,其小说因极具独创性而备受推崇,而他的散文创作却因缺乏创造性而受到较少关注。本文从现代叙事学理论入手,对斯蒂文森的苏格兰散文叙述者及其聚焦特点进行分析,并进一步从心理... 详细信息

罗伯特·路易斯·斯蒂文森是19世纪末新浪漫主义文学的代表,其小说因极具独创性而备受推崇,而他的散文创作却因缺乏创造性而受到较少关注。本文从现代叙事学理论入手,对斯蒂文森的苏格兰散文叙述者及其聚焦特点进行分析,并进一步从心理层面对该类散文的叙事特点进行讨论。

关键词：斯蒂文森散文叙述者聚焦创作心理.

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