Brent R Helliker

Brent R Helliker

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Brent R Helliker

Brent R Helliker

Publications by authors named "Brent R Helliker"

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Estimating C photosynthesis parameters by fitting intensive A/C curves.

Photosynth Res 2019 Aug 13;141(2):181-194. Epub 2019 Feb 13.

Department of Biology, University of Pennsylvania, 433 S University Ave., 314 Leidy Labs, Philadelphia, PA, 19104, USA.

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http://dx.doi.org/10.1007/s11120-019-00619-8DOI Listing
August 2019

C photosynthesis and climate through the lens of optimality.

Proc Natl Acad Sci U S A 2018 11 6;115(47):12057-12062. Epub 2018 Nov 6.

Department of Biology, University of Pennsylvania, Philadelphia, PA 19104.

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http://dx.doi.org/10.1073/pnas.1718988115DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6255158PMC
November 2018

The energetic and carbon economic origins of leaf thermoregulation.

Nat Plants 2016 08 22;2:16129. Epub 2016 Aug 22.

Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona 85721, USA.

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http://dx.doi.org/10.1038/nplants.2016.129DOI Listing
August 2016

Plant Thermoregulation: Energetics, Trait-Environment Interactions, and Carbon Economics.

Trends Ecol Evol 2015 Dec 17;30(12):714-724. Epub 2015 Oct 17.

Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA; The Santa Fe Institute, USA, 1399 Hyde Park Road, Santa Fe, NM 87501, USA; The iPlant Collaborative, Thomas W. Keating Bioresearch Building, 1657 East Helen Street, Tucson, AZ 85721, USA; Aspen Center for Environmental Studies, 100 Puppy Smith Street, Aspen, CO 81611, USA.

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https://linkinghub.elsevier.com/retrieve/pii/S01695347150023
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http://dx.doi.org/10.1016/j.tree.2015.09.006DOI Listing
December 2015

Leaf-trait plasticity and species vulnerability to climate change in a Mongolian steppe.

Glob Chang Biol 2015 Sep 19;21(9):3489-98. Epub 2015 May 19.

Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA.

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http://dx.doi.org/10.1111/gcb.12934DOI Listing
September 2015

Interpreting species-specific variation in tree-ring oxygen isotope ratios among three temperate forest trees.

Plant Cell Environ 2014 Sep 25;37(9):2169-82. Epub 2014 Apr 25.

Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA.

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http://doi.wiley.com/10.1111/pce.12317
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http://dx.doi.org/10.1111/pce.12317DOI Listing
September 2014

Reconstructing the δ(18) O of atmospheric water vapour via the CAM epiphyte Tillandsia usneoides: seasonal controls on δ(18) O in the field and large-scale reconstruction of δ(18) Oa.

Authors:
Brent R Helliker

Plant Cell Environ 2014 Mar 3;37(3):541-56. Epub 2013 Sep 3.

Department of Biology, University of Pennsylvania, 433 S. University Ave, Philadelphia, PA, 19104, USA.

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http://dx.doi.org/10.1111/pce.12167DOI Listing
March 2014

The effects of defoliation on carbon allocation: can carbon limitation reduce growth in favour of storage?

Tree Physiol 2013 Nov 21;33(11):1216-28. Epub 2013 Nov 21.

Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA.

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http://dx.doi.org/10.1093/treephys/tpt093DOI Listing
November 2013

Environmental impacts on the diversity of methane-cycling microbes and their resultant function.

Front Microbiol 2013 14;4:225. Epub 2013 Aug 14.

Department of Plant Pathology and Microbiology, University of California Riverside, CA, USA ; Department of Ecology and Evolutionary Biology, University of California Irvine, CA, USA.

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http://dx.doi.org/10.3389/fmicb.2013.00225DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3743065PMC
August 2013

Transpiration rate relates to within- and across-species variations in effective path length in a leaf water model of oxygen isotope enrichment.

Plant Cell Environ 2013 Jul 30;36(7):1338-51. Epub 2013 Jan 30.

Department of Biology, University of Pennsylvania, 433 S. University Ave., Philadelphia, PA, 19104, USA.

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http://dx.doi.org/10.1111/pce.12063DOI Listing
July 2013

Mesophyll conductance: internal insights of leaf carbon exchange.

Plant Cell Environ 2013 Apr;36(4):733-5

Physiological Ecology Group, Department of Plant Sciences, The University of Cambridge, Cambridge CB2 3EA, UK.

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http://dx.doi.org/10.1111/pce.12075DOI Listing
April 2013

Legumes mitigate ecological consequences of a topographic gradient in a northern Mongolian steppe.

Oecologia 2012 May 23;169(1):85-94. Epub 2011 Nov 23.

Department of Biology, University of Pennsylvania, Philadelphia, PA 19104-6018, USA.

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http://dx.doi.org/10.1007/s00442-011-2183-xDOI Listing
May 2012

Vulnerability of the northern Mongolian steppe to climate change: insights from flower production and phenology.

Ecology 2012 Apr;93(4):815-24

University of Pennsylvania, Department of Biology, Philadelphia, Pennsylvania 19104, USA.

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http://dx.doi.org/10.1890/11-1003.1DOI Listing
April 2012

Examining the large-scale convergence of photosynthesis-weighted tree leaf temperatures through stable oxygen isotope analysis of multiple data sets.

New Phytol 2011 Dec 7;192(4):912-24. Epub 2011 Sep 7.

Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA.

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http://dx.doi.org/10.1111/j.1469-8137.2011.03851.xDOI Listing
December 2011

On the controls of leaf-water oxygen isotope ratios in the atmospheric Crassulacean acid metabolism epiphyte Tillandsia usneoides.

Authors:
Brent R Helliker

Plant Physiol 2011 Apr 7;155(4):2096-107. Epub 2011 Feb 7.

Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

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http://dx.doi.org/10.1104/pp.111.172494DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3091089PMC
April 2011

Subtropical to boreal convergence of tree-leaf temperatures.

Nature 2008 Jul 11;454(7203):511-4. Epub 2008 Jun 11.

Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

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http://dx.doi.org/10.1038/nature07031DOI Listing
July 2008

Regional-scale estimates of forest CO2 and isotope flux based on monthly CO2 budgets of the atmospheric boundary layer.

SEB Exp Biol Ser 2005 :77-92

Department of Global Ecology, Carneigie Institution of Washington, Stanford, USA.

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September 2007

Reliable determination of oxygen and hydrogen isotope ratios in atmospheric water vapour adsorbed on 3A molecular sieve.

Rapid Commun Mass Spectrom 2006 ;20(23):3612-8

Isotope Hydrology Laboratory, International Atomic Energy Agency, Wagramer Strasse 5, P.O. Box 100, A-1400 Vienna, Austria.

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http://dx.doi.org/10.1002/rcm.2772DOI Listing
January 2007

The contribution of C3 and C4 plants to the carbon cycle of a tallgrass prairie: an isotopic approach.

Oecologia 2003 Aug 19;136(3):347-59. Epub 2003 Jun 19.

Department of Plant Biology, Carnegie Institution of Washington, 260 Panama Street, Stanford, CA 94305, USA.

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http://dx.doi.org/10.1007/s00442-003-1274-8DOI Listing
August 2003

A rapid and precise method for sampling and determining the oxygen isotope ratio of atmospheric water vapor.

Rapid Commun Mass Spectrom 2002 ;16(10):929-32

SIRFER, 257 S. 1400 E., Department of Biology, University of Utah, Salt Lake City 84112, USA.

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http://dx.doi.org/10.1002/rcm.659DOI Listing
June 2002

C photosynthesis, atmospheric CO, and climate.

Oecologia 1997 Oct;112(3):285-299

Stable Isotope Ratio Facility for Environmental Research, Department of Biology, University of Utah, Salt Lake City, UT 84112, USA Fax: 801-581-4665; e-mail: , , , , , US.

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http://dx.doi.org/10.1007/s004420050311DOI Listing
October 1997