The boreal forest is a broad, circumpolar mixture of cool coniferous and deciduous tree species which covers over earth's terrestrial surface (Figure 14.7 million km2, or 11 %, of the 1). At these latitudes, a strong correlation (49) of the earth (145)- A possible exists between the seasonal dynamics of atmospheric carbon dioxide and the seasonal dynamics of the "greenness" causal relation, in which the dynamics of the forests at these latitudes regÂ ulates the atmospheric carbon concentrations, appears to be consistent with the present-day understanding of ecological processes in these ecosystems is a "greenhouse" gas that markedly affects the heat budget of the earth (31, 46). Along with its familiar role in plant photosynthesis, carbon dioxide (23). Thus, the possibility that boreal forests may actively participate in the dynamÂ ics of atmospheric carbon dioxide is of considerable significance, especially since the climatic response to elevated atmospheric carbon dioxide conÂ centrations seems to be strongly directed to the boreal forests of the world (32, 128). understand better the environmental factors controlling the structure and These large-scale forest/environment interactions provide motivation to 0066-4162/89/1120-0001$02.00 HONAN & SHUGART 900E ï¿½ Continuous Permafrost ELZI Discontinuous Permafrost [ill] Boreal Forest Figure 1 Circumpolar
Annual Review of Ecology, Evolution, and Systematics – Annual Reviews
Published: Nov 1, 1989
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