J
Jeffery M Welker
Researcher at Colorado State University
Publications - 12
Citations - 2077
Jeffery M Welker is an academic researcher from Colorado State University. The author has contributed to research in topics: Tundra & Growing season. The author has an hindex of 11, co-authored 12 publications receiving 1935 citations. Previous affiliations of Jeffery M Welker include University of Wyoming & University of Alaska Anchorage.
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Journal ArticleDOI
Global assessment of experimental climate warming on tundra vegetation: heterogeneity over space and time.
Sarah C. Elmendorf,Gregory H. R. Henry,Robert D. Hollister,Robert G. Björk,Anne D. Bjorkman,Terry V. Callaghan,Terry V. Callaghan,Laura Siegwart Collier,Elisabeth J. Cooper,Johannes H. C. Cornelissen,Thomas A. Day,Anna Maria Fosaa,William A. Gould,Jarngerdur Gretarsdottir,John Harte,Luise Hermanutz,David S. Hik,Annika Hofgaard,Frith C. Jarrad,Ingibjörg S. Jónsdóttir,Frida Keuper,Kari Klanderud,Julia A. Klein,Saewan Koh,Gaku Kudo,Simone I. Lang,Val Loewen,Jeremy L. May,Joel Mercado,Anders Michelsen,Ulf Molau,Isla H. Myers-Smith,Steven F. Oberbauer,Sara Pieper,Eric Post,Christian Rixen,Clare H. Robinson,Niels Martin Schmidt,Gaius R. Shaver,Anna Stenström,Anne Tolvanen,Ørjan Totland,Tiffany G. Troxler,Carl-Henrik Wahren,Patrick J. Webber,Jeffery M Welker,Philip A. Wookey +46 more
TL;DR: In this article, a synthesis of 61 experimental warming studies, of up to 20 years duration, in tundra sites worldwide, was used to understand the sensitivity of tundras vegetation to climate warming and to forecast future biodiversity and vegetation feedbacks to climate.
Journal ArticleDOI
Comparative responses of phenology and reproductive development to simulated environmental-change in sub-arctic and high arctic plants
Philip A. Wookey,Andrew N. Parsons,Jeffery M Welker,Jacqueline Potter,Terry V. Callaghan,John A. Lee,Malcolm C. Press +6 more
TL;DR: The developmental processes of seed production were shown to be highly sensitive, even within one growing season, to specific environmental perturbations which differed between sites.
Journal ArticleDOI
Growth responses of four sub-Arctic dwarf shrubs to simulated environmental change
Andrew N. Parsons,Jeffery M Welker,Philip A. Wookey,Malcolm C. Press,Terry V. Callaghan,John A. Lee +5 more
TL;DR: Total above-ground biomass was largely unresponsive to the perturbations due to dilution of current season's growth by material produced in previous years.
Journal ArticleDOI
Environmental constraints on the growth, photosynthesis and reproductive development of Dryas octopetala at a high Arctic polar semi-desert, Svalbard.
Philip A. Wookey,Clare H. Robinson,Andrew N. Parsons,Jeffery M Welker,Malcolm C. Press,Terry V. Callaghan,John A. Lee +6 more
TL;DR: The hypothesis that clonal growth confers survival potential during unfavourable years, together with the ability to capitalise on nutrient flushes and recycle nutrients internally, is supported.
Journal ArticleDOI
Responses of Dryas octopetala to ITEX environmental manipulations : a synthesis with circumpolar comparisons
Jeffery M Welker,Jeffery M Welker,Ulf Molau,Andrew N. Parsons,Clare H. Robinson,Philip A. Wookey +5 more
TL;DR: The International Tundra Experiment (ITEX) was used to examine organismic responses of Dryas octopetala to simulated changes in the summer climate at four tundra sites as part of the ITEX.