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引用次数: 0
摘要
随着1964年阿斯旺大坝的建成，近年来埃及努比亚尼罗河系统的植物群发生了重大变化。1963年，在阿斯旺高坝(AHD)建成之前，尼罗河谷即将成为纳赛尔湖的地区拥有相对丰富的水下和新兴植物群(57种，其中6种是泛水植物)(Boulos 1966)。建立AHD后，Springuel & Murphy(1991)在1980-1986年间记录了9种真水植物，而Ali(1987)仅记录了7种。水生植被的变化可能是由于水位变化和/或水体调节后理化因素的变化(Ali et al. 1995)。讨论了上埃及尼罗河(纳赛尔湖、阿斯旺水库和尼罗河)水、土的理化因子对大型植物植被分布的影响。
Major changes have occurred in the flora of the Nile system in Egyptian Nubia in recent years, following the completion of the Aswan High Dam in 1964. In 1963, the area of the Nile Valley which was to become Lake Nasser had a relatively rich submerged and emergent flora (57 species, of which 6 were euhydrophytes) before the construction of the Aswan High Dam (AHD) (Boulos 1966). After the construction of AHD, Springuel & Murphy (1991) during 1980-1986 recorded 9 species of euhydrophytes, while Ali (1987) recorded 7 species only. Changes in aquatic vegetation may be due to changes in the water level regime and/or changes in the physico-chemical factors following waterbody regulation (Ali et al. 1995). The latter author discussed the effect of physico-chemical factors of both water and hydrosoil on the distribution of macrophyte vegetation in the River Nile in Upper Egypt (Lake Nasser, Aswan Reservoir and the Nile).
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