The ecological characteristics of the riparian vegetation affected by river overflowing disturbance in the lower Tarim River |
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Authors: | Hailiang Xu Mao Ye Jimei Li |
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Institution: | (1) Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011 Urumqi, China;(2) Geography Science and Tourism College of Xinjiang Normal University, 830054 Urumqi, China |
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Abstract: | Based on data obtained from field investigations, this paper aims to analyze the influence of the river overflow on the desert
riparian vegetation and discuss the function of the river overflow on the vegetation restoration at the lower Tarim River.
The results show that (1) there are only 17 species, 13 genera and 9 families in the study areas before river overflow, while
there are 34 species, 26 genera and 12 families after the overflowing in which 18 species emerged newly; (2) judging by the
biodiversity indices, the species diversity and species richness in the river overflowed area increase more significantly
than those in the un-overflow area; (3) judging by the importance of different species after years of river overflowing, the
annual herbs germinate quickly at first, while the perennial herbs with deep roots or root clones become dominant in the plant
community; (4) after several times of river overflowing, some arbors and shrubs such as Populus euphratica and Tamarix ramosissima germinate easily and can dominate gradually in the plant community. The results indicate that the river overflowing restores
the severely degraded ecosystem in the lower Tarim River and the function is connected with restoration of eco-hydrological
processes in the study areas. The results suggest that experimental overflowing has initiated a process of restoring ecosystem
function within the riparian forest. |
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