Timing is Everything: Seasonality and Phenological Dynamics Linking Species, Communities and Trophic Feedbacks in the Low vs. High Arctic
We are collecting data on phenological dynamics of plants in response to observed and experimental warming, at the species- and community scales, at study sites in Kangerlussuaq and Zackenberg, Greenland. The focus of the data collection is at Kangerlussuaq, where we have expanded our long-term monitoring plots and added some experimental warming plots using open-topped chambers to compare the spatial dynamics of species-specific responses to warming at small and larger spatial scales. Simultaneously, we are continuing our observations on the timing of onset and progression of the season of parturition by caribou and muskoxen at Kangerlussuaq and by muskoxen at Zackenberg. Initial results indicate continued trophic mismatch between the timing of plant growth and calving by caribou in Kangerlussuaq, but a trophic match for muskoxen at both study sites. We are deploying camera traps at the Kangerlussuaq site to record remotely the temporal dynamics of caribou and muskox foraging at the study site, and phenology cameras to record remotely the dynamics of plant phenology at the same time. We have also begun sampling invertebrate emergence and developmental phenology and will be looking at this in relation to plant phenology as well.
Project Duration:1 July 2009 - 30 June 2012
Short Description of education and/or outreach components of project:
Summer 2010: We hosted a visit to the Kangerlussuaq study site by students and faculty from Dartmouth college during the summer 2010 field season, and presented a short-course on arctic terrestrial ecology.
Programs:Arctic System Science Program
Funding Agency:National Science Foundation
Funding Solicitation/Announcement:Changing Seasonality in the Arctic System (CSAS): NSF 08-567
Unique Project Identifier (Grant #, Project #, Other):0902125
Grant/Project Funding Amount:$363137
Papers in Review or Press
Kerby, J., C.C. Wilmers, and E. Post, "Climate change, phenology, and the nature of consumer-resource interactions: advancing the match/mismatch hypothesis", in T. Ohgushi, O.J. Schmitz, and R.D. Holt, (editors), Ecology and evolution of trait-mediated interactions: linking evolution, community, and ecosystem, Cambridge University Press, Cambridge (in press).
Cahoon, S., P. Sullivan, E. Post, & J. Welker, "Herbivores limit CO2 uptake and suppress carbon cycle responses to warming in the Arctic", Global Change Biology, (in review).
Høye, T.T., E. Post, N.M. Schmidt, K. Trojelsgaard, & M.C. Forchhammer, "Shorter flowering season in a warmer Arctic", Global Change Biology, (in review).
Post, E., "Ecology of Recent Climate Change", Princeton University Press (in review).
Post, E., "Phenology: response, driver, and ecological integrator", Penn State University ecology graduate student invited seminar, University Park, PA (2011).
Post, E.,"Ecological response to climate change across scales of space, time, and biological organization", University of Calgary Ecology graduate student invited seminar, Calgary, AB (2011).
Kerby, J. and M. Avery, "Seasonality and Phenological Dynamics Linking Species, Communities, and Trophic Feedbacks in the Low- vs. High-Arctic", Seasonality Project Meeting, University of Vermont, Burlington, VT (2010).