Alpine Tundra and Sub Alpine Forest Nutrient Cycling By: Ryan

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Transcript Alpine Tundra and Sub Alpine Forest Nutrient Cycling By: Ryan

Winter Ecology Spring 2009
Mountain Research Station, University of Colorado,
Boulder
What Processes and Conditions
Alter Nutrient Distribution in the
Alpine and Subalpine zones of
Niwot Ridge?
Climate- locally and regionally
Landscape Continuum Model
Climate Change
Anthropogenic Alterations
Conceptual Framework
Complexity of interactions
Resource distribution
Transport processes
Transport Processes
Climate Change
Nitrogen Deposition
Areas of Amplification
Down hill transport
Dry fall
Redistribution of Snow
Areas of amplified resources
SOIL NUTRIENTS AND BIOGEOCHEMICAL
CYCLING IN THE FOREST-ALPINE TUNDRA
ECOTONE
-Aspect and side of Continental divide
-Winter soil temperatures highly dependant on snow depth
-Length of growing season
-Talus tundra slope
-Microtopography and microclimates of Krummholz
- Stable microclimates great source for global change
studies.
Extreme and Complex System
The Landscape Continuum Model
Global Change
Interactions between transport processes
Zones of Amplification
Future studies and Current Studies
Admundson R, Jenny H. 1997. On a state factor model of ecosystems. BioScience 47: 536– 543.
Billings, W. D. 1988. Alpine vegetation. Pages 391-420 in M. G. Barbour and W. D.
Billings, editors. North American terrestrial vegetation. Cambridge University
Press, Cambridge.
Burns SF,Tonkin PJ. 1982. Soil-geomorphic models and the spatial distribution and
development of alpine soils. Pages 25–44 in Thorn CE, ed. Space and Time in
Geomorphology. London: George Allen and Unwin.
Greenland, D., and M. Losleben. 2001. Climate. Pages 337 in W. D. Bowman and T.
R. Seastedt, editors. Structure and Function of an Alpine Ecosystem, Niwot
Ridge, Colorado. Oxford University Press, New York.
Mujica-Crapanzano. Landscape Analysis of Vegetation and Diversity Patterns at Niwot Ridge,
Colorado. Diss, University of Colorado Boulder
Ley RE,Williams MW, Schmidt SK. 2004.Microbial population dynamics in an extreme
environment: Controlling factors in talus soils at 3750 m in the Colorado Rocky
Mountains. Biogeochemistry.
Liptzin, Daniel. SOIL NUTRIENTS AND BIOGEOCHEMICAL CYCLING IN THE FORESTALPINE TUNDRA ECOTONE. Diss, The University of Colorado Boulder
Seastedt, T. R., W. D. Bowman, T. N. Caine, D. McKnight, A. Townsend, and M. W.
Williams. 2004. The landscape continuum: A model for high-elevation
ecosystems. Bioscience 54:111-121.
Swanson FJ, Kratz TK, Caine N,Woodmansee RG. 1988. Landform effects on ecosystem
patterns and processes. BioScience 38: 92–98.