Results 251 to 260 of about 121,574 (310)

Boreal Forests and Tundra

Water, Air, & Soil Pollution, 1993
The circumpolar boreal biomes cover ca. 2 109 ha of the northern hemisphere and contain ca. 800 Pg C in biomass, detritus, soil, and peat C pools. Current estimates indicate that the biomes are presently a net C sink of 0.54 Pg C yr-1. Biomass, detritus and soil of forest ecosystems (including ca. 419 Pg peat) contain ca.
M. J. Apps, W. A. Kurz, R. J. Luxmoore, L. O. Nilsson, R. A. Sedjo, R. Schmidt, L. G. Simpson, T. S. Vinson   +7 more
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Boreal Forest and Forest Fires

2020
Boreal forest has played a role as sink of atmospheric CO2 due to the slow growth of black spruce; however, changes in source of atmospheric CO2 by forest fires and recent warming have significantly triggered modulation in physiological ecology and biogeochemistry over the boreal forest of Alaska.
Yongwon Kim, Hideki Kobayashi, Shin Nagai, Masahito Ueyama, Bang-Yong Lee, Rikie Suzuki   +5 more
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Boreal forests on fire - Decadal wildfire impacts on boreal forest microclimate

2023
Wildfire is the most important disturbance agent in boreal forests. These disturbances play a major role in the boreal forest carbon cycle. They lead to direct CO2 and CH4 emissions during the active fire phase and to long-lasting post-fire impacts on net CO2 and CH4 fluxes through changes in forest structure and in microclimatic conditions.
Manuel Helbig, Lilly Daw
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The boreal forest as a cultural landscape

Annals of the New York Academy of Sciences, 2012
Because of its generally low density of humans and few settlements, the circumpolar boreal forest is often viewed as an untouched wilderness. However, archeological evidence indicates that humans have inhabited the region since the continental glaciers disappeared 8,000–12,000 years ago.
Edward A, Johnson, Kiyoko, Miyanishi
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Radar modeling of a boreal forest

IEEE Transactions on Geoscience and Remote Sensing, 1991
The authors report on the use of microwave modeling, ground truth, and synthetic aperture radar (SAR) data to investigate the characteristics of forest stands. A mixed coniferous forest stand has been modeled at SAR frequencies (P-, L-, and C-bands).
Narinder S. Chauhan, Roger H. Lang, Kenneth Jon Ranson   +2 more
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Constraints to growth of boreal forests

Nature, 2000
Understanding how the growth of trees at high latitudes in boreal forest is controlled is important for projections of global carbon sequestration and timber production in relation to climate change. Is stem growth of boreal forest trees constrained by the length of the growing season when stem cambial cells divide1, or by the length of the period when
P, Jarvis, S, Linder
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The Nature of the Boreal Forest

Space and Culture, 2003
This article addresses the ontological status of nature in environmental politics by taking up the question of sustainable forest management in the Canadian boreal. In particular, it draws from Michel Foucault's notion of governmentality to argue that the historicity of “forest-nature” is indispensable for understanding the politics of sustainable ...
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Landscape ecology of boreal forests

Trends in Ecology & Evolution, 1992
It is becoming increasingly clear that densities and dynamics of various organisms often cannot be understood from the processes occurring within separate habitat patches. Effects from surrounding areas also have to be considered; a landscape perspective has to be employed.
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Trees and boreal forests.

2012
Abstract This chapter focuses on the effects of temperature on the growth-dormancy cycling of boreal forest trees. It includes recent warming-induced changes in phenology and growth in trees, adaptation techniques in response to global warming, and temperature effects in the growing season (photosynthesis and morphology).
J. E. Olsen, Y. K. Lee
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A future for boreal forests

Science, 2016
Forest Ecology![Figure][1] Boreal forest and wetlands along the Labrador Coastal Drive, Canada PHOTO: © ALL CANADA PHOTOS/ALAMY STOCK PHOTO Conservation under climate change presents the challenge of predicting where will be suitable for particular organisms and ecological communities ...
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