Winter in northeastern North America: a critical period for ecological processes

Ecological research during winter has historically been a low priority in northeastern North America, an oversight that stems from the commonly accepted notion that there is little biological activity when temperatures drop below freezing. However, recent research has shown that winter can be an especially important period for ecological processes, providing evidence that “dormant season” is a misnomer. Uncertainties about the effects of climate change on ecosystems are highlighting the need for a more thorough understanding of winter ecology. The failure to collect winter data in northeastern North America has meant that researchers are ill-equipped to make predictions about how ecosystems will respond to future climate change. A more focused, integrative ecological winter monitoring and research effort will enable us to better prepare for, and respond to, future climate change.

[1]  P. Groffman,et al.  Snow depth, soil freezing, and fluxes of carbon dioxide, nitrous oxide and methane in a northern hardwood forest , 2006 .

[2]  F. Chapin,et al.  Siberian CO2 efflux in winter as a CO2 source and cause of seasonality in atmospheric CO2 , 1996 .

[3]  Steven P. Hamburg,et al.  Effects of an intense ice storm on the structure of a northern hardwood forest , 2002 .

[4]  M. H. Jones,et al.  Long-term experimental manipulation of winter snow regime and summer temperature in arctic and alpine tundra , 1999 .

[5]  Jerry M. Melillo,et al.  Soil Warming and Carbon-Cycle Feedbacks to the Climate System , 2002, Science.

[6]  G. Robitaille,et al.  Increased soil nitrate losses under mature sugar maple trees affected by experimentally induced deep frost , 1995 .

[7]  M. Lima,et al.  Numerical fluctuations in the northern short-tailed shrew: evidence of non-linear feedback signatures on population dynamics and demography , 2002 .

[8]  J. M. Bremner,et al.  Enzyme activity in soils at subzero temperatures , 1975 .

[9]  P. Schaberg,et al.  Physiological and environmental causes of freezing injury in red spruce , 2000 .

[10]  J. Grace,et al.  Life in the Cold--An Introduction to Winter Ecology. , 1989 .

[11]  M. Lima,et al.  Seasonal regulation in fluctuating small mammal populations: feedback structure and climate , 2001 .

[12]  Charles H. W. Foster.  Forests in Time: The Environmental Consequences of 1,000 Years of Change in New England (review) , 2005, Journal of Interdisciplinary History.

[13]  Charles T. Driscoll,et al.  Colder soils in a warmer world: A snow manipulation study in a northern hardwood forest ecosystem , 2001 .

[14]  A. Mosier,et al.  CO2, CH4 and N2O flux through a Wyoming snowpack and implications for global budgets , 1993, Nature.

[15]  James B. Shanley,et al.  The effect of frozen soil on snowmelt runoff at Sleepers River, Vermont† , 1999 .

[16]  O. Schmitz,et al.  Wildlife and climate change: assessing the sensitivity of selected species to simulated doubling of atmospheric CO2 , 1997 .

[17]  L. Irland.  Ice storms and forest impacts. , 2000, The Science of the total environment.

[18]  C. Driscoll,et al.  The episodic acidification of Adirondack Lakes during snowmelt , 1990 .

[19]  Gene E. Likens,et al.  Biogeochemistry of a Forested Ecosystem , 1996, Springer New York.

[20]  Christopher W. Schadt,et al.  Seasonal Dynamics of Previously Unknown Fungal Lineages in Tundra Soils , 2003, Science.

[21]  J. Parker.  Photosynthesis of Picea Excelsa in Winter , 1953 .

[22]  W. D. Schmid.  Survival of frogs in low temperature. , 1982, Science.

[23]  T. Huntington,et al.  Changes in the timing of high river flows in New England over the 20th Century , 2003 .

[24]  D. Blumstein,et al.  Yellow-bellied Marmots (Marmota flaviventris) Hibernate Socially , 2004 .

[25]  James F. Reynolds,et al.  Arctic ecosystems in a changing climate : an ecophysiological perspective , 1993 .

[26]  J. Hadley.  Effect of Daily Minimum Temperature on Photosynthesis in Eastern Hemlock (Tsuga canadensis L.) in Autumn and Winter , 2000 .

[27]  P. Groffman,et al.  Effects of mild winter freezing on soil nitrogen and carbon dynamics in a northern hardwood forest , 2001 .

[28]  H. Marchant.  Snow Ecology: An Interdisciplinary Examination of Snow-Covered Ecosystems , 2001 .

[29]  S. Dorland,et al.  Denitrification and ammonification at low soil temperatures , 1991 .

[30]  R. Monson,et al.  Carbon availability and temperature control the post-snowmelt decline in alpine soil microbial biomass , 2000 .

[31]  M. Kirby,et al.  Increasing Great Lake-Effect Snowfall during the Twentieth Century: A Regional Response to Global Warming?. , 2003 .

[32]  P. Marchand.  Life in the cold : an introduction to winter ecology , 1988 .

[33]  I. C. James,et al.  Historical changes in lake ice‐out dates as indicators of climate change in New England, 1850–2000 , 2002 .

[34]  Andrew W. Ellis,et al.  SYNOPTIC MECHANISMS ASSOCIATED WITH SNOWFALL INCREASES TO THE LEE OF LAKES ERIE AND ONTARIO , 1996 .

[35]  Nils Chr. Stenseth,et al.  CLIMATIC VARIABILITY, PLANT PHENOLOGY, AND NORTHERN UNGULATES , 1999 .

[36]  D. Burns,et al.  Relation of Climate Change to the Acidification of Surface Waters by Nitrogen Deposition , 1998 .

[37]  C. McKay,et al.  Metabolic Activity of Permafrost Bacteria below the Freezing Point , 2000, Applied and Environmental Microbiology.

[38]  J. Welker,et al.  Winter Biological Processes Could Help Convert Arctic Tundra to Shrubland , 2005 .

[39]  L. E. Goodrich,et al.  The influence of snow cover on the ground thermal regime , 1982 .

[40]  K. Tonnessen,et al.  Natural variability in N export from headwater catchments: snow cover controls on ecosystem N retention , 1999 .

[41]  J. Schimel,et al.  Increased snow depth affects microbial activity and nitrogen mineralization in two Arctic tundra communities , 2004 .

[42]  R. Naiman,et al.  Selective Foraging and Ecosystem Processes in Boreal Forests , 1992, The American Naturalist.

[43]  L. Shipley,et al.  Diet choices made by free-ranging moose in northern Sweden in relation to plant distribution, chemistry, and morphology , 1998 .

[44]  K. Storey,et al.  NATURAL FREEZING SURVIVAL IN ANIMALS , 1996 .

[45]  P. Brooks,et al.  Microbial activity under alpine snowpacks, Niwot Ridge, Colorado , 1996 .

[46]  Deane Wang,et al.  Snow Removal and Ambient Air Temperature Effects on Forest Soil Temperatures in Northern Vermont , 2003 .

[47]  K. Elder,et al.  Carbon limitation of soil respiration under winter snowpacks: potential feedbacks between growing season and winter carbon fluxes , 2005 .

[48]  P. Brooks,et al.  Winter production of CO2 and N2O from alpine tundra: environmental controls and relationship to inter-system C and N fluxes , 1997, Oecologia.

[49]  J. Goksøyr,et al.  Respiratory burst after freezing and thawing of soil: Experiments with soil bacteria , 1988 .

[50]  D. Raynal,et al.  Fine root growth phenology, production, and turnover in a northern hardwood forest ecosystem , 1994, Plant and Soil.

[51]  D. Parkinson,et al.  Winter respiratory activity in aspen woodland forest floor litter and soils , 1987 .

[52]  W. Pruitt.  Animals in the snow. , 1960, Scientific American.

[53]  J. Schimel,et al.  Microbial response to freeze-thaw cycles in tundra and taiga soils , 1996 .

[54]  P. Groffman,et al.  Soil freezing alters fine root dynamics in a northern hardwood forest , 2001 .

[55]  Graeme Wynn,et al.  Forests in time. The environmental consequences of 1000 years of change in New England , 2005 .

[56]  J. Aber,et al.  Soil warming and carbon-cycle feedbacks to the climate system. , 2002, Science.

[57]  J. Houghton,et al.  Climate change 2001 : the scientific basis , 2001 .

[58]  T. Meyers,et al.  Impacts of changing climate and atmospheric deposition on N and S drainage losses from a forested watershed of the Adirondack Mountains, New York State , 2003 .

[59]  Mark D. Schwartz,et al.  Changes in North American spring , 2000 .

[60]  Gene E. Likens,et al.  Climatic Control of Nitrate Loss from Forested Watersheds in the Northeast United States , 1996 .

[61]  J. Schimel,et al.  Microbial activity of tundra and taiga soils at sub-zero temperatures , 1995 .