Doliner L H, Jolliffe P A
Department of Botany, The University of British Columbia, V6T 1W5, Vancouver, B.C., Canada.
Department of Plant Science, The University of British Columbia, V6T 1W5, Vancouver, B.C., Canada.
Oecologia. 1979 Jan;38(1):23-34. doi: 10.1007/BF00347821.
Ecological data were analyzed to determine the environmental conditions associated with the occurrence of plants possessing C and C photosynthetic pathways. Non-parametric analysis of variance, multiple regression analysis and discriminant analysis techniques were applied to information derived from separate studies on plant species in California and central Europe. All the analyses revealed significant differences in ecology between the C and C groups. The occurrence of C species was greater where summer or winter temperatures were relatively high and moisture availability relatively low. Using discriminant analysis, more than 80% of the species considered were classified into the correct photosynthetic category on the basis of their distribution with respect to temperature. No significant differences between the C and C groups were found for other environmental factors, including light, soil nitrogen, soil salinity and continentality of climate. These results support the suggestion from previous physiological studies that C species may possess competitive advantages under conditions of high temperature and intermittent water stress. The C species were relatively restricted in the range of environmental conditions where they occurred, and as a group C species may be ecologically more specialized than C species.
分析生态数据以确定与具有C3和C4光合途径的植物出现相关的环境条件。将非参数方差分析、多元回归分析和判别分析技术应用于从加利福尼亚和中欧植物物种的单独研究中获得的信息。所有分析都揭示了C3和C4组在生态方面的显著差异。在夏季或冬季温度相对较高且水分可利用性相对较低的地方，C4物种的出现更为频繁。使用判别分析，超过80%被考虑的物种根据其温度分布被正确分类到光合类别中。对于其他环境因素，包括光照、土壤氮、土壤盐分和气候大陆性，C3和C4组之间未发现显著差异。这些结果支持了先前生理学研究的建议，即C4物种在高温和间歇性水分胁迫条件下可能具有竞争优势。C4物种出现的环境条件范围相对受限，作为一个群体，C4物种在生态上可能比C3物种更具特异性。
