| 书目名称 | Vegetation of the Earth and Ecological Systems of the Geo-biosphere | | 编辑 | Heinrich Walter | | 视频video | | | 丛书名称 | Heidelberg Science Library | | 图书封面 |  | | 描述 | Phytomass and Primary Production of the Various Vegetational Zones and of the Entire Biosphere The biosphere is that thin layer at the earth‘s surface in which living organisms exist and biological cycling takes place. It includes the upper horizons of the soil in which plants root, the atmosphere near the ground, (insofar as organisms penetrate this space), and all the surface waters. More than 99% of the earth‘s biomass is phytomass, to which we shall limit our discussion. Amounts of phytomass are distinctly related to vegeta tional zones. Because accurate determination of phytomass and primary production is difficult, only gross estimates have been available until recently. However, in 1970, Bazilevich et al. published (in Russian) more accurate calculations, based on the rapidly accumulating literature, for the various thermal zones and bioclimatic regions of the earth. These authors calculated mean phyto mass and mean annual primary production for the various regions as dry mass (in tons) per hectare. On the basis of measurements of the areas covered by the individual regions, excluding rivers, lakes, glaciers, and permanent snow, total phytomass and total annual primary pro | | 出版日期 | Textbook 19792nd edition | | 关键词 | Vegetation; cyclin; earth; plants; soil | | 版次 | 2 | | doi | https://doi.org/10.1007/978-1-4684-0468-5 | | isbn_ebook | 978-1-4684-0468-5Series ISSN 0073-1595 | | issn_series | 0073-1595 | | copyright | Springer-Verlag New York Inc. 1979 |
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发表于 2025-3-21 16:13:34
