Institution: University of New Hampshire
Department: Dept. of Natural Resources and the Environment
James Hall
Durham, NH 03824
Department: Dept. of Natural Resources and the Environment
James Hall
Durham, NH 03824
Hubbard Brook Role: Investigator
Research Interests
Currently, my primary research interest at Hubbard Brook focuses on understanding the responses of different tree species and forest ecosystems to drought, particularly identifying the underlying physiological mechanisms that determine ecological thresholds of dieback and mortality. I am using several different approaches to address this question, including a long-term precipitation manipulation experiment to simulate a once-in-a-century drought, and dendochronology coupled with stable isotope techniques to assess tree growth and physiological responses to historic climate variability. A second research project focuses on assessing the long-term trends in evapotranspiration, and how these trends relate to different potential biotic and abiotic drivers. Ultimately, I am interested in scaling up processes occurring at the individual leaf to tree scales to influence larger scale patterns and ecosystem services at the ecosystem watershed, and landscape scales.
Hubbard Brook Publications by this Author
4549695
asbjornsen
1
apa
50
date
desc
423
https://hubbardbrook.org/wp-content/plugins/zotpress/
%7B%22status%22%3A%22success%22%2C%22updateneeded%22%3Afalse%2C%22instance%22%3Afalse%2C%22meta%22%3A%7B%22request_last%22%3A0%2C%22request_next%22%3A0%2C%22used_cache%22%3Atrue%7D%2C%22data%22%3A%5B%7B%22key%22%3A%22DN9WCXXY%22%2C%22library%22%3A%7B%22id%22%3A4549695%7D%2C%22meta%22%3A%7B%22creatorSummary%22%3A%22Malcomb%20et%20al.%22%2C%22parsedDate%22%3A%222025-07-29%22%2C%22numChildren%22%3A0%7D%2C%22bib%22%3A%22%26lt%3Bdiv%20class%3D%26quot%3Bcsl-bib-body%26quot%3B%20style%3D%26quot%3Bline-height%3A%202%3B%20padding-left%3A%201em%3B%20text-indent%3A-1em%3B%26quot%3B%26gt%3B%5Cn%20%20%26lt%3Bdiv%20class%3D%26quot%3Bcsl-entry%26quot%3B%26gt%3BMalcomb%2C%20J.%20D.%2C%20Epstein%2C%20H.%20E.%2C%20Vadeboncoeur%2C%20M.%20A.%2C%20Druckenbrod%2C%20D.%20L.%2C%20Lanning%2C%20M.%2C%20Wang%2C%20L.%2C%20Asbjornsen%2C%20H.%2C%20%26amp%3B%20Scanlon%2C%20T.%20M.%20%282025%29.%20Divergent%20water%20use%20efficiency%20trends%20among%20eastern%20North%20American%20temperate%20tree%20species.%20%26lt%3Bi%26gt%3BOecologia%26lt%3B%5C%2Fi%26gt%3B%2C%20%26lt%3Bi%26gt%3B207%26lt%3B%5C%2Fi%26gt%3B%288%29%2C%20137.%20%26lt%3Ba%20class%3D%26%23039%3Bzp-ItemURL%26%23039%3B%20href%3D%26%23039%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1007%5C%2Fs00442-025-05753-w%26%23039%3B%26gt%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1007%5C%2Fs00442-025-05753-w%26lt%3B%5C%2Fa%26gt%3B%26lt%3B%5C%2Fdiv%26gt%3B%5Cn%26lt%3B%5C%2Fdiv%26gt%3B%22%2C%22data%22%3A%7B%22itemType%22%3A%22journalArticle%22%2C%22title%22%3A%22Divergent%20water%20use%20efficiency%20trends%20among%20eastern%20North%20American%20temperate%20tree%20species%22%2C%22creators%22%3A%5B%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Jacob%20D.%22%2C%22lastName%22%3A%22Malcomb%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Howard%20E.%22%2C%22lastName%22%3A%22Epstein%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Matthew%20A.%22%2C%22lastName%22%3A%22Vadeboncoeur%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Daniel%20L.%22%2C%22lastName%22%3A%22Druckenbrod%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Matthew%22%2C%22lastName%22%3A%22Lanning%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Lixin%22%2C%22lastName%22%3A%22Wang%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Heidi%22%2C%22lastName%22%3A%22Asbjornsen%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Todd%20M.%22%2C%22lastName%22%3A%22Scanlon%22%7D%5D%2C%22abstractNote%22%3A%22Both%20theory%20and%20observations%20suggest%20that%20tree%20intrinsic%20water%20use%20efficiency%20%28iWUE%29%5Cu2014the%20ratio%20of%20photosynthetic%20carbon%20assimilation%20to%20stomatal%20conductance%20to%20water%5Cu2014increases%20with%20atmospheric%20CO2.%20However%2C%20the%20strength%20of%20this%20relationship%20varies%20across%20sites%20and%20species%2C%20prompting%20questions%20about%20additional%20physiological%20constraints%20and%20environmental%20controls%20on%20iWUE.%20In%20this%20study%2C%20we%20analyzed%20tree%20core%20carbon%20isotope%20ratios%20to%20examine%20trends%20in%2C%20and%20drivers%20of%2C%20iWUE%20in%2012%20tree%20species%20common%20to%20the%20temperate%20forests%20of%20eastern%20North%20America%2C%20where%20forests%20have%20experienced%20changes%20in%20CO2%2C%20climate%2C%20and%20atmospheric%20pollution%20in%20recent%20decades.%20Across%20all%20site-species%20combinations%2C%20we%20found%20that%20tree%20iWUE%20increased%2022.3%25%20between%201950%20and%202011%2C%20coinciding%20with%20a%2025.2%25%20increase%20in%20atmospheric%20CO2.%20iWUE%20trajectories%20varied%20markedly%20among%20tree%20functional%20groups%20and%20within%20species%20across%20sites.%20Needleleaf%20evergreen%20iWUE%20increased%20until%20circa%202002%20before%20declining%20in%20recent%20years%2C%20while%20iWUE%20of%20broadleaf%20deciduous%20species%20continued%20to%20increase.%20The%20analysis%20of%20environmental%20controls%20on%20iWUE%20trends%20revealed%20smaller%20increases%20in%20iWUE%20in%20trees%20subjected%20to%20higher%20atmospheric%20pollution%20loads.%20Our%20results%20suggest%20that%20tree%20functional%20characteristics%20and%20atmospheric%20pollution%20history%20influence%20tree%20response%20to%20atmospheric%20CO2%2C%20with%20implications%20for%20forest%20carbon%20and%20water%20balance%20in%20temperate%20regions.%22%2C%22date%22%3A%222025-07-29%22%2C%22section%22%3A%22%22%2C%22partNumber%22%3A%22%22%2C%22partTitle%22%3A%22%22%2C%22DOI%22%3A%2210.1007%5C%2Fs00442-025-05753-w%22%2C%22citationKey%22%3A%22%22%2C%22url%22%3A%22https%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1007%5C%2Fs00442-025-05753-w%22%2C%22PMID%22%3A%22%22%2C%22PMCID%22%3A%22%22%2C%22ISSN%22%3A%221432-1939%22%2C%22language%22%3A%22en%22%2C%22collections%22%3A%5B%5D%2C%22dateModified%22%3A%222025-10-08T20%3A26%3A39Z%22%7D%7D%2C%7B%22key%22%3A%2248EF962D%22%2C%22library%22%3A%7B%22id%22%3A4549695%7D%2C%22meta%22%3A%7B%22creatorSummary%22%3A%22Vadeboncoeur%20et%20al.%22%2C%22parsedDate%22%3A%222020-03-11%22%2C%22numChildren%22%3A0%7D%2C%22bib%22%3A%22%26lt%3Bdiv%20class%3D%26quot%3Bcsl-bib-body%26quot%3B%20style%3D%26quot%3Bline-height%3A%202%3B%20padding-left%3A%201em%3B%20text-indent%3A-1em%3B%26quot%3B%26gt%3B%5Cn%20%20%26lt%3Bdiv%20class%3D%26quot%3Bcsl-entry%26quot%3B%26gt%3BVadeboncoeur%2C%20M.%20A.%2C%20Jennings%2C%20K.%20A.%2C%20Ouimette%2C%20A.%20P.%2C%20%26amp%3B%20Asbjornsen%2C%20H.%20%282020%29.%20Correcting%20tree-ring%20%26%23x3B4%3B13C%20time%20series%20for%20tree-size%20effects%20in%20eight%20temperate%20tree%20species.%20%26lt%3Bi%26gt%3BTree%20Physiology%26lt%3B%5C%2Fi%26gt%3B%2C%20%26lt%3Bi%26gt%3B40%26lt%3B%5C%2Fi%26gt%3B%283%29%2C%20333%26%23x2013%3B349.%20%26lt%3Ba%20class%3D%26%23039%3Bzp-DOIURL%26%23039%3B%20href%3D%26%23039%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1093%5C%2Ftreephys%5C%2Ftpz138%26%23039%3B%26gt%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1093%5C%2Ftreephys%5C%2Ftpz138%26lt%3B%5C%2Fa%26gt%3B%26lt%3B%5C%2Fdiv%26gt%3B%5Cn%26lt%3B%5C%2Fdiv%26gt%3B%22%2C%22data%22%3A%7B%22itemType%22%3A%22journalArticle%22%2C%22title%22%3A%22Correcting%20tree-ring%20%5Cu03b413C%20time%20series%20for%20tree-size%20effects%20in%20eight%20temperate%20tree%20species%22%2C%22creators%22%3A%5B%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Matthew%20A.%22%2C%22lastName%22%3A%22Vadeboncoeur%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Katie%20A.%22%2C%22lastName%22%3A%22Jennings%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Andrew%20P.%22%2C%22lastName%22%3A%22Ouimette%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Heidi%22%2C%22lastName%22%3A%22Asbjornsen%22%7D%5D%2C%22abstractNote%22%3A%22Abstract.%20%20Stable%20carbon%20isotope%20ratios%20%28%5Cu03b413C%29%20in%20tree%20rings%20have%20been%20widely%20used%20to%20study%20changes%20in%20intrinsic%20water-use%20efficiency%20%28iWUE%29%2C%20sometimes%20with%20lim%22%2C%22date%22%3A%222020%5C%2F03%5C%2F11%22%2C%22section%22%3A%22%22%2C%22partNumber%22%3A%22%22%2C%22partTitle%22%3A%22%22%2C%22DOI%22%3A%2210.1093%5C%2Ftreephys%5C%2Ftpz138%22%2C%22citationKey%22%3A%22%22%2C%22url%22%3A%22https%3A%5C%2F%5C%2Facademic.oup.com%5C%2Ftreephys%5C%2Farticle%5C%2F40%5C%2F3%5C%2F333%5C%2F5715048%22%2C%22PMID%22%3A%22%22%2C%22PMCID%22%3A%22%22%2C%22ISSN%22%3A%22%22%2C%22language%22%3A%22en%22%2C%22collections%22%3A%5B%22J9HXJ926%22%5D%2C%22dateModified%22%3A%222022-06-09T17%3A39%3A12Z%22%7D%7D%2C%7B%22key%22%3A%22EQNJX3DF%22%2C%22library%22%3A%7B%22id%22%3A4549695%7D%2C%22meta%22%3A%7B%22creatorSummary%22%3A%22Yang%20et%20al.%22%2C%22parsedDate%22%3A%222019-11-01%22%2C%22numChildren%22%3A0%7D%2C%22bib%22%3A%22%26lt%3Bdiv%20class%3D%26quot%3Bcsl-bib-body%26quot%3B%20style%3D%26quot%3Bline-height%3A%202%3B%20padding-left%3A%201em%3B%20text-indent%3A-1em%3B%26quot%3B%26gt%3B%5Cn%20%20%26lt%3Bdiv%20class%3D%26quot%3Bcsl-entry%26quot%3B%26gt%3BYang%2C%20Y.%2C%20Meng%2C%20L.%2C%20Yanai%2C%20R.%20D.%2C%20Montesdeoca%2C%20M.%2C%20Templer%2C%20P.%20H.%2C%20Asbjornsen%2C%20H.%2C%20Rustad%2C%20L.%20E.%2C%20%26amp%3B%20Driscoll%2C%20C.%20T.%20%282019%29.%20Climate%20change%20may%20alter%20mercury%20fluxes%20in%20northern%20hardwood%20forests.%20%26lt%3Bi%26gt%3BBiogeochemistry%26lt%3B%5C%2Fi%26gt%3B%2C%20%26lt%3Bi%26gt%3B146%26lt%3B%5C%2Fi%26gt%3B%281%29%2C%201%26%23x2013%3B16.%20%26lt%3Ba%20class%3D%26%23039%3Bzp-ItemURL%26%23039%3B%20href%3D%26%23039%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1007%5C%2Fs10533-019-00605-1%26%23039%3B%26gt%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1007%5C%2Fs10533-019-00605-1%26lt%3B%5C%2Fa%26gt%3B%26lt%3B%5C%2Fdiv%26gt%3B%5Cn%26lt%3B%5C%2Fdiv%26gt%3B%22%2C%22data%22%3A%7B%22itemType%22%3A%22journalArticle%22%2C%22title%22%3A%22Climate%20change%20may%20alter%20mercury%20fluxes%20in%20northern%20hardwood%20forests%22%2C%22creators%22%3A%5B%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Yang%22%2C%22lastName%22%3A%22Yang%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Linghui%22%2C%22lastName%22%3A%22Meng%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Ruth%20D.%22%2C%22lastName%22%3A%22Yanai%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Mario%22%2C%22lastName%22%3A%22Montesdeoca%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Pamela%20H.%22%2C%22lastName%22%3A%22Templer%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Heidi%22%2C%22lastName%22%3A%22Asbjornsen%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Lindsey%20E.%22%2C%22lastName%22%3A%22Rustad%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Charles%20T.%22%2C%22lastName%22%3A%22Driscoll%22%7D%5D%2C%22abstractNote%22%3A%22Soils%20are%20the%20largest%20terrestrial%20pool%20of%20mercury%20%28Hg%29%2C%20a%20neurotoxic%20pollutant.%20Pathways%20of%20Hg%20accumulation%20and%20loss%20in%20forest%20soils%20include%20throughfall%2C%20litterfall%2C%20soil%20gas%20fluxes%2C%20and%20leaching%20in%20soil%20solution%2C%20all%20of%20which%20will%20likely%20be%20altered%20under%20changing%20climate.%20We%20took%20advantage%20of%20three%20ongoing%20climate-change%20manipulation%20experiments%20at%20the%20Hubbard%20Brook%20Experimental%20Forest%2C%20New%20Hampshire%2C%20USA%3A%20a%20combined%20growing-season%20warming%20and%20winter%20freeze-thaw%20cycle%20experiment%2C%20a%20throughfall%20exclusion%20to%20mimic%20drought%2C%20and%20a%20simulated%20ice%20storm%20experiment%20to%20examine%20the%20response%20of%20the%20forest%20Hg%20cycle%20to%20climatic%20disturbances.%20Across%20these%20three%20experiments%2C%20we%20compared%20Hg%20inputs%20in%20throughfall%20and%20leaf%20litterfall%20and%20Hg%20outputs%20in%20soil%20gas%20fluxes.%20Soil%20solution%20was%20measured%20only%20in%20the%20simulated%20ice%20storm%20experiment.%20We%20found%20that%20northern%20forest%20soils%20retained%20consistently%20less%20Hg%20by%2016%5Cu201360%25%20in%20the%20three%20climate%20manipulations%20compared%20to%20the%20undisturbed%20controls%20%28~%5Cu20097.4%5Cu00a0%5Cu00b5g%20Hg%20m%5Cu22122%20year%5Cu22121%29%2C%20although%20soils%20across%20all%20three%20experiments%20still%20served%20as%20a%20net%20sink%20for%20Hg.%20Growing-season%20soil%20warming%20and%20combined%20soil%20warming%20and%20winter%20freeze-thaw%20cycles%20had%20little%20effect%20on%20litterfall%20and%20throughfall%20flux%2C%20but%20they%20increased%20soil%20Hg0%20evasion%20by%2031%20and%2035%25%2C%20respectively%2C%20relative%20to%20the%20control%20plots.%20The%20drought%20plots%20had%205%25%20lower%20litterfall%20Hg%20flux%2C%2050%25%20lower%20throughfall%20Hg%20flux%2C%20and%2021%25%20lower%20soil%20Hg0%20evasion%20than%20the%20control%20plots.%20The%20simulated%20ice%20storm%20had%2023%25%20higher%20litterfall%20Hg%20flux%2C%201%25%20higher%20throughfall%20Hg%20flux%2C%2037%25%20higher%20soil%20Hg0%20evasion%2C%20and%20151%25%20higher%20soil%20Hg%20leaching%20than%20the%20control%20plots.%20These%20observations%20suggest%20that%20climate%20changes%20such%20as%20warmer%20soils%20in%20the%20growing%20season%20or%20more%20intense%20ice%20storms%20in%20winter%20are%20likely%20to%20exacerbate%20Hg%20pollution%20by%20releasing%20Hg%20sequestered%20in%20forest%20soils%20via%20evasion%20and%20leaching.%22%2C%22date%22%3A%222019-11-01%22%2C%22section%22%3A%22%22%2C%22partNumber%22%3A%22%22%2C%22partTitle%22%3A%22%22%2C%22DOI%22%3A%2210.1007%5C%2Fs10533-019-00605-1%22%2C%22citationKey%22%3A%22%22%2C%22url%22%3A%22https%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1007%5C%2Fs10533-019-00605-1%22%2C%22PMID%22%3A%22%22%2C%22PMCID%22%3A%22%22%2C%22ISSN%22%3A%221573-515X%22%2C%22language%22%3A%22en%22%2C%22collections%22%3A%5B%22J9HXJ926%22%5D%2C%22dateModified%22%3A%222022-06-09T20%3A57%3A43Z%22%7D%7D%2C%7B%22key%22%3A%22LG8C9CJP%22%2C%22library%22%3A%7B%22id%22%3A4549695%7D%2C%22meta%22%3A%7B%22creatorSummary%22%3A%22Asbjornsen%20et%20al.%22%2C%22parsedDate%22%3A%222018%22%2C%22numChildren%22%3A0%7D%2C%22bib%22%3A%22%26lt%3Bdiv%20class%3D%26quot%3Bcsl-bib-body%26quot%3B%20style%3D%26quot%3Bline-height%3A%202%3B%20padding-left%3A%201em%3B%20text-indent%3A-1em%3B%26quot%3B%26gt%3B%5Cn%20%20%26lt%3Bdiv%20class%3D%26quot%3Bcsl-entry%26quot%3B%26gt%3BAsbjornsen%2C%20H.%2C%20Campbell%2C%20J.%20L.%2C%20Jennings%2C%20K.%20A.%2C%20Vadeboncoeur%2C%20M.%20A.%2C%20McIntire%2C%20C.%2C%20Templer%2C%20P.%20H.%2C%20Phillips%2C%20R.%20P.%2C%20Bauerle%2C%20T.%20L.%2C%20Dietze%2C%20M.%20C.%2C%20Frey%2C%20S.%20D.%2C%20Groffman%2C%20P.%20M.%2C%20Guerrieri%2C%20R.%2C%20Hanson%2C%20P.%20J.%2C%20Kelsey%2C%20E.%20P.%2C%20Knapp%2C%20A.%20K.%2C%20McDowell%2C%20N.%20G.%2C%20Meir%2C%20P.%2C%20Novick%2C%20K.%20A.%2C%20Ollinger%2C%20S.%20V.%2C%20%26%23x2026%3B%20Rustad%2C%20L.%20E.%20%282018%29.%20Guidelines%20and%20considerations%20for%20designing%20field%20experiments%20simulating%20precipitation%20extremes%20in%20forest%20ecosystems.%20%26lt%3Bi%26gt%3BMethods%20in%20Ecology%20and%20Evolution%26lt%3B%5C%2Fi%26gt%3B%2C%20%26lt%3Bi%26gt%3B9%26lt%3B%5C%2Fi%26gt%3B%2812%29%2C%202310%26%23x2013%3B2325.%20%26lt%3Ba%20class%3D%26%23039%3Bzp-DOIURL%26%23039%3B%20href%3D%26%23039%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1111%5C%2F2041-210X.13094%26%23039%3B%26gt%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1111%5C%2F2041-210X.13094%26lt%3B%5C%2Fa%26gt%3B%26lt%3B%5C%2Fdiv%26gt%3B%5Cn%26lt%3B%5C%2Fdiv%26gt%3B%22%2C%22data%22%3A%7B%22itemType%22%3A%22journalArticle%22%2C%22title%22%3A%22Guidelines%20and%20considerations%20for%20designing%20field%20experiments%20simulating%20precipitation%20extremes%20in%20forest%20ecosystems%22%2C%22creators%22%3A%5B%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Heidi%22%2C%22lastName%22%3A%22Asbjornsen%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22John%20L.%22%2C%22lastName%22%3A%22Campbell%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Katie%20A.%22%2C%22lastName%22%3A%22Jennings%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Matthew%20A.%22%2C%22lastName%22%3A%22Vadeboncoeur%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Cameron%22%2C%22lastName%22%3A%22McIntire%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Pamela%20H.%22%2C%22lastName%22%3A%22Templer%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Richard%20P.%22%2C%22lastName%22%3A%22Phillips%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Taryn%20L.%22%2C%22lastName%22%3A%22Bauerle%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Michael%20C.%22%2C%22lastName%22%3A%22Dietze%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Serita%20D.%22%2C%22lastName%22%3A%22Frey%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Peter%20M.%22%2C%22lastName%22%3A%22Groffman%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Rosella%22%2C%22lastName%22%3A%22Guerrieri%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Paul%20J.%22%2C%22lastName%22%3A%22Hanson%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Eric%20P.%22%2C%22lastName%22%3A%22Kelsey%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Alan%20K.%22%2C%22lastName%22%3A%22Knapp%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Nathan%20G.%22%2C%22lastName%22%3A%22McDowell%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Patrick%22%2C%22lastName%22%3A%22Meir%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Kimberly%20A.%22%2C%22lastName%22%3A%22Novick%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Scott%20V.%22%2C%22lastName%22%3A%22Ollinger%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Will%20T.%22%2C%22lastName%22%3A%22Pockman%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Paul%20G.%22%2C%22lastName%22%3A%22Schaberg%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Stan%20D.%22%2C%22lastName%22%3A%22Wullschleger%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Melinda%20D.%22%2C%22lastName%22%3A%22Smith%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Lindsey%20E.%22%2C%22lastName%22%3A%22Rustad%22%7D%5D%2C%22abstractNote%22%3A%22Precipitation%20regimes%20are%20changing%20in%20response%20to%20climate%20change%2C%20yet%20understanding%20of%20how%20forest%20ecosystems%20respond%20to%20extreme%20droughts%20and%20pluvials%20remains%20incomplete.%20As%20future%20precipitation%20extremes%20will%20likely%20fall%20outside%20the%20range%20of%20historical%20variability%2C%20precipitation%20manipulation%20experiments%20%28PMEs%29%20are%20critical%20to%20advancing%20knowledge%20about%20potential%20ecosystem%20responses.%20However%2C%20few%20PMEs%20have%20been%20conducted%20in%20forests%20compared%20to%20short-statured%20ecosystems%2C%20and%20forest%20PMEs%20have%20unique%20design%20requirements%20and%20constraints.%20Moreover%2C%20past%20forest%20PMEs%20have%20lacked%20coordination%2C%20limiting%20cross-site%20comparisons.%20Here%2C%20we%20review%20and%20synthesize%20approaches%2C%20challenges%2C%20and%20opportunities%20for%20conducting%20PMEs%20in%20forests%2C%20with%20the%20goal%20of%20guiding%20design%20decisions%2C%20while%20maximizing%20the%20potential%20for%20coordination.%20We%20reviewed%2063%20forest%20PMEs%20at%2070%20sites%20world-wide.%20Workshops%2C%20meetings%2C%20and%20communications%20with%20experimentalists%20were%20used%20to%20generate%20and%20build%20consensus%20around%20approaches%20for%20addressing%20the%20key%20challenges%20and%20enhancing%20coordination.%20Past%20forest%20PMEs%20employed%20a%20variety%20of%20study%20designs%20related%20to%20treatment%20level%2C%20replication%2C%20plot%20and%20infrastructure%20characteristics%2C%20and%20measurement%20approaches.%20Important%20considerations%20for%20establishing%20new%20forest%20PMEs%20include%3A%20selecting%20appropriate%20treatment%20levels%20to%20reach%20ecological%20thresholds%3B%20balancing%20cost%2C%20logistical%20complexity%2C%20and%20effectiveness%20in%20infrastructure%20design%3B%20and%20preventing%20unintended%20water%20subsidies.%20Response%20variables%20in%20forest%20PMEs%20were%20organized%20into%20three%20broad%20tiers%20reflecting%20increasing%20complexity%20and%20resource%20intensiveness%2C%20with%20the%20first%20tier%20representing%20a%20recommended%20core%20set%20of%20common%20measurements.%20Differences%20in%20site%20conditions%20combined%20with%20unique%20research%20questions%20of%20experimentalists%20necessitate%20careful%20adaptation%20of%20guidelines%20for%20forest%20PMEs%20to%20balance%20local%20objectives%20with%20coordination%20among%20experiments.%20We%20advocate%20adoption%20of%20a%20common%20framework%20for%20coordinating%20forest%20PME%20design%20to%20enhance%20cross-site%20comparability%20and%20advance%20fundamental%20knowledge%20about%20the%20response%20and%20sensitivity%20of%20diverse%20forest%20ecosystems%20to%20precipitation%20extremes.%22%2C%22date%22%3A%222018%22%2C%22section%22%3A%22%22%2C%22partNumber%22%3A%22%22%2C%22partTitle%22%3A%22%22%2C%22DOI%22%3A%2210.1111%5C%2F2041-210X.13094%22%2C%22citationKey%22%3A%22%22%2C%22url%22%3A%22https%3A%5C%2F%5C%2Fbesjournals.onlinelibrary.wiley.com%5C%2Fdoi%5C%2Fabs%5C%2F10.1111%5C%2F2041-210X.13094%22%2C%22PMID%22%3A%22%22%2C%22PMCID%22%3A%22%22%2C%22ISSN%22%3A%222041-210X%22%2C%22language%22%3A%22en%22%2C%22collections%22%3A%5B%22J9HXJ926%22%5D%2C%22dateModified%22%3A%222022-06-09T19%3A48%3A32Z%22%7D%7D%2C%7B%22key%22%3A%228X828ALE%22%2C%22library%22%3A%7B%22id%22%3A4549695%7D%2C%22meta%22%3A%7B%22creatorSummary%22%3A%22Vadeboncoeur%20et%20al.%22%2C%22parsedDate%22%3A%222018%22%2C%22numChildren%22%3A0%7D%2C%22bib%22%3A%22%26lt%3Bdiv%20class%3D%26quot%3Bcsl-bib-body%26quot%3B%20style%3D%26quot%3Bline-height%3A%202%3B%20padding-left%3A%201em%3B%20text-indent%3A-1em%3B%26quot%3B%26gt%3B%5Cn%20%20%26lt%3Bdiv%20class%3D%26quot%3Bcsl-entry%26quot%3B%26gt%3BVadeboncoeur%2C%20M.%20A.%2C%20Green%2C%20M.%20B.%2C%20Asbjornsen%2C%20H.%2C%20Campbell%2C%20J.%20L.%2C%20Adams%2C%20M.%20B.%2C%20Boyer%2C%20E.%20W.%2C%20Burns%2C%20D.%20A.%2C%20Fernandez%2C%20I.%20J.%2C%20Mitchell%2C%20M.%20J.%2C%20%26amp%3B%20Shanley%2C%20J.%20B.%20%282018%29.%20Systematic%20variation%20in%20evapotranspiration%20trends%20and%20drivers%20across%20the%20Northeastern%20United%20States.%20%26lt%3Bi%26gt%3BHydrological%20Processes%26lt%3B%5C%2Fi%26gt%3B%2C%20%26lt%3Bi%26gt%3B32%26lt%3B%5C%2Fi%26gt%3B%2823%29%2C%203547%26%23x2013%3B3560.%20%26lt%3Ba%20class%3D%26%23039%3Bzp-DOIURL%26%23039%3B%20href%3D%26%23039%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1002%5C%2Fhyp.13278%26%23039%3B%26gt%3Bhttps%3A%5C%2F%5C%2Fdoi.org%5C%2F10.1002%5C%2Fhyp.13278%26lt%3B%5C%2Fa%26gt%3B%26lt%3B%5C%2Fdiv%26gt%3B%5Cn%26lt%3B%5C%2Fdiv%26gt%3B%22%2C%22data%22%3A%7B%22itemType%22%3A%22journalArticle%22%2C%22title%22%3A%22Systematic%20variation%20in%20evapotranspiration%20trends%20and%20drivers%20across%20the%20Northeastern%20United%20States%22%2C%22creators%22%3A%5B%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Matthew%20A.%22%2C%22lastName%22%3A%22Vadeboncoeur%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Mark%20B.%22%2C%22lastName%22%3A%22Green%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Heidi%22%2C%22lastName%22%3A%22Asbjornsen%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22John%20L.%22%2C%22lastName%22%3A%22Campbell%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Mary%20Beth%22%2C%22lastName%22%3A%22Adams%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Elizabeth%20W.%22%2C%22lastName%22%3A%22Boyer%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Douglas%20A.%22%2C%22lastName%22%3A%22Burns%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Ivan%20J.%22%2C%22lastName%22%3A%22Fernandez%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22Myron%20J.%22%2C%22lastName%22%3A%22Mitchell%22%7D%2C%7B%22creatorType%22%3A%22author%22%2C%22firstName%22%3A%22James%20B.%22%2C%22lastName%22%3A%22Shanley%22%7D%5D%2C%22abstractNote%22%3A%22The%20direction%20and%20magnitude%20of%20responses%20of%20evapotranspiration%20%28ET%29%20to%20climate%20change%20are%20important%20to%20understand%2C%20as%20ET%20represents%20a%20major%20water%20and%20energy%20flux%20from%20terrestrial%20ecosystems%2C%20with%20consequences%20that%20feed%20back%20to%20the%20climate%20system.%20We%20inferred%20multidecadal%20trends%20in%20water%20balance%20in%2011%20river%20basins%20%281940%5Cu20132012%29%20and%20eight%20smaller%20watersheds%20%28with%20records%20ranging%20from%2018%20to%2061%20years%20in%20length%29%20in%20the%20Northeastern%20United%20States.%20Trends%20in%20river%20basin%20actual%20ET%20%28AET%29%20varied%20across%20the%20region%2C%20with%20an%20apparent%20latitudinal%20pattern%3A%20AET%20increased%20in%20the%20cooler%20northern%20part%20of%20the%20region%20%28Maine%29%20but%20decreased%20in%20some%20warmer%20regions%20to%20the%20southwest%20%28Pennsylvania%5Cu2013Ohio%29.%20Of%20the%20four%20small%20watersheds%20with%20records%20longer%20than%2045%20years%2C%20two%20fit%20this%20geographic%20pattern%20in%20AET%20trends.%20The%20differential%20effects%20of%20the%20warming%20climate%20on%20AET%20across%20the%20region%20may%20indicate%20different%20mechanisms%20of%20change%20in%20more-%20vs.%20less-energy-limited%20watersheds%2C%20even%20though%20annual%20precipitation%20greatly%20exceeds%20potential%20ET%20across%20the%20entire%20region.%20Correlations%20between%20AET%20and%20time%20series%20of%20temperature%20and%20precipitation%20also%20indicate%20differences%20in%20limiting%20factors%20for%20AET%20across%20the%20Northeastern%20U.S.%20climate%20gradient.%20At%20many%20sites%20across%20the%20climate%20gradient%2C%20water-year%20AET%20correlated%20with%20summer%20precipitation%2C%20implying%20that%20water%20limitation%20is%20at%20least%20transiently%20important%20in%20some%20years%2C%20whereas%20correlations%20with%20temperature%20indices%20were%20more%20prominent%20in%20northern%20than%20southern%20sites%20within%20the%20region.%22%2C%22date%22%3A%222018%22%2C%22section%22%3A%22%22%2C%22partNumber%22%3A%22%22%2C%22partTitle%22%3A%22%22%2C%22DOI%22%3A%2210.1002%5C%2Fhyp.13278%22%2C%22citationKey%22%3A%22%22%2C%22url%22%3A%22https%3A%5C%2F%5C%2Fonlinelibrary.wiley.com%5C%2Fdoi%5C%2Fabs%5C%2F10.1002%5C%2Fhyp.13278%22%2C%22PMID%22%3A%22%22%2C%22PMCID%22%3A%22%22%2C%22ISSN%22%3A%221099-1085%22%2C%22language%22%3A%22en%22%2C%22collections%22%3A%5B%22J9HXJ926%22%5D%2C%22dateModified%22%3A%222022-06-09T18%3A12%3A40Z%22%7D%7D%5D%7D
Malcomb, J. D., Epstein, H. E., Vadeboncoeur, M. A., Druckenbrod, D. L., Lanning, M., Wang, L., Asbjornsen, H., & Scanlon, T. M. (2025). Divergent water use efficiency trends among eastern North American temperate tree species. Oecologia, 207(8), 137. https://doi.org/10.1007/s00442-025-05753-w
Vadeboncoeur, M. A., Jennings, K. A., Ouimette, A. P., & Asbjornsen, H. (2020). Correcting tree-ring δ13C time series for tree-size effects in eight temperate tree species. Tree Physiology, 40(3), 333–349. https://doi.org/10.1093/treephys/tpz138
Yang, Y., Meng, L., Yanai, R. D., Montesdeoca, M., Templer, P. H., Asbjornsen, H., Rustad, L. E., & Driscoll, C. T. (2019). Climate change may alter mercury fluxes in northern hardwood forests. Biogeochemistry, 146(1), 1–16. https://doi.org/10.1007/s10533-019-00605-1
Asbjornsen, H., Campbell, J. L., Jennings, K. A., Vadeboncoeur, M. A., McIntire, C., Templer, P. H., Phillips, R. P., Bauerle, T. L., Dietze, M. C., Frey, S. D., Groffman, P. M., Guerrieri, R., Hanson, P. J., Kelsey, E. P., Knapp, A. K., McDowell, N. G., Meir, P., Novick, K. A., Ollinger, S. V., … Rustad, L. E. (2018). Guidelines and considerations for designing field experiments simulating precipitation extremes in forest ecosystems. Methods in Ecology and Evolution, 9(12), 2310–2325. https://doi.org/10.1111/2041-210X.13094
Vadeboncoeur, M. A., Green, M. B., Asbjornsen, H., Campbell, J. L., Adams, M. B., Boyer, E. W., Burns, D. A., Fernandez, I. J., Mitchell, M. J., & Shanley, J. B. (2018). Systematic variation in evapotranspiration trends and drivers across the Northeastern United States. Hydrological Processes, 32(23), 3547–3560. https://doi.org/10.1002/hyp.13278