BIPED
发表于 2025-3-28 16:40:41
Characterization of Eastern U.S. Spruce-Fir Soilsgy, elevation, and climate. This chapter will describe the characteristics of soils supporting eastern spruce-fir ecosystems, including soil properties that are important in understanding forest function and the consequences of atmospheric deposition to forested ecosystems. Chapter 1 described the s
Nostalgia
发表于 2025-3-28 20:34:14
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Highbrow
发表于 2025-3-29 00:16:02
Condition and Recent Trends in High-Elevation Red Spruce Populations first of the two fundamental questions regarding trends in red spruce: Has the condition of red spruce (. Sarg.) in the eastern United States really deteriorated, and if so, what is the nature and magnitude of that trend? This first question bears close scrutiny: a search for mechanisms to explain
thyroid-hormone
发表于 2025-3-29 05:22:24
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山顶可休息
发表于 2025-3-29 08:09:49
Soil-Mediated Effects of Atmospheric Deposition on Eastern U.S. Spruce-Fir Forestssms may be involved. In the German situation, soil-mediated hypotheses played (and still play) a major role; namely, soil acidification and aluminum toxicity (Ulrich et al. 1980) and base cation deficiencies (especially Mg; Rehfuess et al. 1987, Hüttl and Wisniewski 1987). In the red spruce case, th