Mountain Vegetation - Mountain Geography: Physical and Human Dimensions - page 392

Schmid, J. M., and Frye, R. H. 1977. Spruce beetle in the Rockies. U.S. Forest Service
General Technical Report RM-49.
Schneeweiss, G. M., and Schönswetter, P. 2011. A re-appraisal of nunatak survival in
arctic-alpine phylogeography. Molecular Ecology 20: 190-192.
Schönswetter, P., Popp, M., and Brochmann, C. 2006. Rare arctic-alpine plants of the
European Alps have different immigration histories: The snow bed species Minuartia
biflora and Ranunculus pygmaeus. Molecular Ecology 15: 709-720.
Schönswetter, P., Tribsch, A., Schneeweiss, G. M., and Niklfeld, H. 2003. Disjunctions in
relict alpine plants: Phylogeography of Androsace brevis and A. wulfeniana (Primu-
laceae). Botanical Journal of the Linnean Society 141: 437-446.
Scott, D., and Billings, W. D. 1964. Effects of environmental factors on standing crop
and productivity of an alpine tundra. Ecological Monographs 34: 243-270.
Scuderi, L. A. 1987. Late-Holocene upper timberline variation in the southern Sierra
Nevada. Nature 325: 242-244.
Seastedt, T. R., and Adams, G. A. 2001. Effects of mobile tree islands on alpine tundra
soils. Ecology 82: 8-17.
Shankman, D. 1984. Tree regeneration following fire as evidence of timberline stability
in the Colorado Front Range, U.S.A. Arctic and Alpine Research 16: 413-417.
Shaw, C. H. 1909. Causes of timber line on mountains: The role of snow. Plant World 12:
169-181.
Sleumer, H. 1965. The role of Ericaceae in the tropical montane and subalpine forest
of Malaysia. In UNESCO Symposium on Ecological Research in Humid Tropics (pp.
179-184). Paris: Pegetalion.
Smith, E. K., Resler, L. M., Vance, E. A., Carstensen, L. W. Jr., and Kolivras, K. N.
2011. Blister rust incidence in treeline whitebark pine, Glacier National Park, U.S.A.:
Environmental and topographic influences. Arctic, Antarctic, and Alpine Research
43:107-117.
Smith, J. M. B. 1975. Mountain grasslands of New Guinea. Journal of Biogeography 2:
27-44.
Smith, J. M. B. 1977. Vegetation and microclimate of east- and west-facing slopes in the
grasslands of Mt. Wilhelm, Papua, New Guinea. Journal of Ecology 65: 39-53.
Smith, J. M. B., and Cleef, A. M. 1988. Composition and origins of the world's tropic-
alpine floras. Journal of Biogeography 15: 631-645.
Spalding, J. B. 1979. The aeolian ecology of White Mountain Peak, California: Wind-
blown insect fauna. Arctic and Alpine Research 11: 83-94.
Steinger, T., Körner, C., and Schmid, B. 1996. Long-term persistence in a changing cli-
mate: DNA analysis suggests very old ages of clones of alpine Carex curvula. Oeco-
logia 105: 94-99.
Stevens, G. C., and Fox, J. F. 1991. The causes of treeline. Annual Review of Ecology and
Systematics 22: 177-191.
Swan, L. W. 1961. The ecology of the high Himalayas. Scientific American 205: 68-78.
Swan, L. W. 1963a. Aeolian Zone. Science 140: 77-78.
Swan, L. W. 1963b. Ecology of the heights. Natural History 72: 22-29.