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A. P. Gusev 《Russian Journal of Ecology》2009,40(3):160-165
Specific features of progressive succession in the vegetation of anthropogenically transformed landscapes in southeastern Belarus have been studied in permanent test plots. Using phytoindication scales proposed by Ellenberg (1974) and Tsyganov (1983), trends of changes in ecological conditions in the first years of succession have been revealed. 相似文献
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Population heterogeneity in cespitose, fibrous-rooted, brevirhizomatous, stoloniferous, and tap-rooted herbaceous and woody plants is described. This heterogeneity is caused by the multivariant character of plant ontogeny (i.e., its dimensional, morphological, rhythmological, and temporal multiversality), which is regarded as the main adaptation mechanism operating in plant populations because it provides for the diversity of ontogenetic pathways under different ecological conditions. 相似文献
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层次分析法在城市生态环境质量评价中的应用 总被引:29,自引:1,他引:29
根据层次分析法的基本原理,在城市生态环境质量评价中建立各层次模型,并以福州市为例,通过对该市近年来城市生态环境质量的评价结果分析,对今后城市规划提出建议,为以后建设生态城市提供直接服务。 相似文献
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Parameters of Ecological Space and Floristic Diversity of Forest Formations in the Northeast of European Russia 总被引:1,自引:0,他引:1
S. V. Degteva 《Russian Journal of Ecology》2005,36(3):158-163
The results of studies on transformations of the floristic diversity of forest ecosystems under the effect of human activity in the southern and middle taiga subzones of the Komi Republic are reviewed. It is shown that the change of dominants in the tree layer leads to the formation of specific biotopes and, as a consequence, to changes in floristic complexes and the cenotic roles of species in the lower layers of forest communities. In the study region, the -diversity of forest communities is determined mainly by two environmental factors: soil fertility and acidity. The factor of illumination has only a slight effect on the -diversity of taiga forests, which is especially clear in the group of deciduous forest formations.__________Translated from Ekologiya, No. 3, 2005, pp. 180–185.Original Russian Text Copyright © 2005 by Degteva. 相似文献
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四川省中低产田土的综合治理 总被引:1,自引:0,他引:1
本文以四川中低产田土综合治理实况为例,着重论述了自然灾害对农业生态系统的严重危害,从而阐明了改造中低产田土对提高经济、生态、社会三大效益的重要性和紧迫性,并从省情出发,总结提出当前乃至今后相当一个时期,农业部门所应采取的几项行之有效的措施,展望了2000年前景。 相似文献
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