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Heat and drought impact on carbon exchange in an age-sequence of temperate pine forests

Ecological Processes 2022年第1期11卷 108-125页

作者： M.Altaf Arain Bing Xu jason j.brodeur Myroslava Khomik Matthias Peichl Eric Beamesderfer Natalia Restrepo‑Couple Robin Thorne School of Earth Environment and Society and McMaster Centre for Climate ChangeMcMaster University1280 Main Street WestHamiltonON L8S 4K1Canada Department of Biological Sciences University of CalgaryAlbertaCanada Department of Geography and Environmental Management University of WaterlooWaterlooONCanada Department of Forest Ecology and Management Swedish University of Agricultural SciencesUmeåSweden School of Informatics Computingand Cyber SystemsNorthern Arizona UniversityFlagstaffAZUSA Department of Ecology and Evolutionary Biology University of ArizonaTucsonAZUSA Department of Geography Wilfrid Laurier UniversityWaterlooONCanada

Background:Most North American temperate forests are plantation or regrowth forests,which are actively *** forests are in different stages of their growth cycles and their ability to sequester atmospheric carbon is affected by extreme weather *** this study,the impact of heat and drought events on carbon sequestration in an age‑sequence(80,45,and 17 years as of 2019)of eastern white pine(Pinus strobus L.)forests in southern Ontario,Canada was examined using eddy covariance flux measurements from 2003 to ***:Over the 17‑year study period,the mean annual values of net ecosystem productivity(NEP)were 180±96,538±177 and 64±165 g C m^(–2)yr^(–1)in the 80‑,45‑and 17‑year‑old stands,respectively,with the highest annual carbon sequestration rate observed in the 45‑year‑old *** found that air temperature(Ta)was the dominant control on NEP in all three different‑aged stands and drought,which was a limiting factor for both gross ecosystem productivity(GEP)and ecosystems respiration(RE),had a smaller impact on ***,the simultaneous occurrence of heat and drought events during the early growing seasons or over the consecutive years had a significant negative impact on annual NEP in all three *** observed a similar trend of NEP decline in all three stands over three consecutive years that experienced extreme weather events,with 2016 being a hot and dry,2017 being a dry,and 2018 being a hot *** youngest stand became a net source of carbon for all three of these years and the oldest stand became a small source of carbon for the first time in 2018 since observations started in ***,in 2019,all three stands reverted to annual net carbon ***:Our study results indicate that the timing,frequency and concurrent or consecutive occurrence of extreme weather events may have significant implications for carbon sequestration in temperate conifer forests in Eastern North *** study is one of few globally available t

关键词： Carbon fluxes Net ecosystem productivity Ecosystem respiration Extreme weather events Drought Temperate forest White pine Eddy covariance

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The Use and Exchange of Biological Control Agents for Food and Agriculture

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中国生物防治学报 2010年第S1期26卷 123-127页

作者： j.C.van Lenteren M.j.W.Cock j.brodeur B.Barratt F.Bigler K.Bolckmans F.Haas P.G.Mason j.R.P.Parra Laboratory of Entomology Wageningen UniversityP.O.Box80316700 EH WageningenNetherlands CABI Europe-Switzerland Rue des Grillons 1CH-2800 DelémontSwitzerland Institut de recherche en biologie végétale Universitéde Montréal4101rue Sher-brooke EstMontréal(Québec)Canada AgResearch Limited Invermay Agricultural CentrePuddle AlleyPrivate Bag 50034Mos-gielNew Zealand Agroscope Reckenholz-Tanikon Research Station ART Reckenholzstrasse 191CH-8046 ZurichSwitzerland Koppert B.V. Veilingweg 14Postbus 1552650 AD Berkel en RodenrijsThe Netherlands Icipe Duduville CampusKasaraniP.O.Box30772-00100NairobiKenya Agriculture and Agri-Food Canada Research CentreK.W.Neatby Building960 Carling AvenueOttawaOntario K1A0C6Canada Departamento de Entomologia Fitopatologia e Zoologia AgrícolaESALQ/USP.Caixa Postal0913418-900 Piracicaba-SPBrazil

The report sets out to summarize the past and current situation regarding the practice of biologicalcontrol inrelationtothe use and exchange of genetic resources relevant for *** considers the twomain categories of biological control:classical and *** access to BCAs for use inanother country imposes no risk of liability to the source *** scientific knowledge abouthabitats,fauna andflora,can be

关键词： The Use and Exchange of Biological Control Agents for Food and Agriculture

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应用体外致敏的淋巴细胞与异源性骨髓瘤细胞融合制备人单克隆抗体

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细胞与分子免疫学杂志 1987年第1期 22-22页

作者： B.R.brodeur,j.Lagace,黄其全 Hybridoma Section Laboratory Centre for Disease Control OTTAWA Ontario.CANADA KIA OL2 Hybridoma Section Laboratory Centre for Disease Control OTTAWA Ontario.CANADA KIA OL2

由于不能通过活体免疫制备抗原特异性的B细胞,以及缺乏可用作融合成分的非免疫球蛋白分泌性的骨髓瘤,它可无限地分泌特异性免疫球蛋白,因此防碍了有用的人单克隆抗体(MAb)的制备。作者已经对用B型流感杆菌的蛋白质抗原作体外免疫,其产... 详细信息

由于不能通过活体免疫制备抗原特异性的B细胞,以及缺乏可用作融合成分的非免疫球蛋白分泌性的骨髓瘤,它可无限地分泌特异性免疫球蛋白,因此防碍了有用的人单克隆抗体(MAb)的制备。作者已经对用B型流感杆菌的蛋白质抗原作体外免疫,其产生特异性抗体讨程中的一些影响因素进行了研究。并建立了一种小鼠-人异源骨髓瘤的融合细胞。扁桃腺

关键词：骨髓瘤细胞淋巴细胞白细胞单克隆抗体异源性

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