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Luo T.,Hubei University | Lun Z.,Hubei University | Gu Y.,Hubei University | Gu Y.,Hubei Key Laboratory of Wetland Evolution and Eco Restoration WEER | And 4 more authors.
Wetland Science | Year: 2015

Dajiuhu wetlands are rare in the central area of subtropical alpine. Due to the enhancement of modern human activities, the ecological environment of the wetlands is under destruction and the research on the natural conservation is urgent. Based on the detailed survey on the 47 representative plots, this paper reports the detailed survey and research on the plant species composition and community characteristics of Dajiuhu wetlands after the implementation of "Dajiuhu wetland protection and ecological restoration project". Dajiuhu wetlands had 98 species of higher vascular plants within 46 families and 83 genera in 2012. Detailed analysis on the community dominant species composition and habitat characteristics demonstrated that Dajiuhu wetlands had that the current dominant plant species in the Dajiuhu wetlands were Carex argyi, Sanguisorba officinalis, Juncus effusus, Festuca rubra and Sphagnum palustre, most of which belonged to the main part of the species composition of meadow; compared with that in 2000, the number of plant species in the Dajiuhu wetlands had increased 74 species, most of which were from Gramineae, Rosaceae, Asteraceae, Polygonaceae, Leguminosae etc.; according to the features of plant species composition and soils, 6 types were obtained including hygrophyte peat bogs, hygrophyte herbaceous marshes, degraded semi-hygrophyte marshes, hygrophyte-mesophyte meadow, moderate-xeric meadow, and xeric meadow; the policy of returning farmland to grassland and wetland has produced great roles on the eco-restoration of peat bog ecosystem and ecological damage in the study area has been basically under control, but at the same time the increasing of artificial lakes and xeric meadow area was adverse to the wetland ecological restoration.

Gu Y.-S.,Wuhan University | Gu Y.-S.,Hubei Key Laboratory of Wetland Evolution and Eco Restoration WEER | Li K.-J.,Wuhan University | Qin Y.-M.,Wuhan University | And 6 more authors.
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | Year: 2013

On the basis of historical documents and previous researching data, this paper has rebuilt 5 stages of human activity history and its impact on the ecological environment of Jianghan Lake Group since the historical period. Stage 1 has a slight impact due to the low population in the Neolithic age. Stage 2 (from Chu Dynasty to Sui Dynasty, 770BC-618AD) has gradually enhanced intensity of human activity related to the slow growth of human population and land reclamation. The intensity of human activity in Stage 3 (from Tang Dynasty to Ming Dynasty, 618-1644AD) is greatly enhanced due to the sharp growth in population. The intensity of human activity is stronger in Stage 4 (from Qing Dynasty to the Republic of China, 1644-1949AD). The impact of human activity on the Jianghan Lake Group is strongest in Stage 5 since the foundation of New China (1949AD-present). Due to the extensive reclamation from lakes, the Jianghan Lake Group has undergone a sharp loss of lake numbers, area, water volume, and biodiversity. Our results demonstrate that human activity has turned into being the dominant factor which controls the lake ecology and environment change. The intensive human activity has changed the area, quantity, community structure, biodiversity, and other aspects of nutritional status of lakes. Finally, the lake ecosystem has turned into being fragile, which is the key restriction to the local sustainable development. It is urgently needed to rethink the impact of human activity on the Jianghan Lake Group. How to treat with the relationship between human and lakes is the biggest topic on the regional sustainable development. Harmonious coexistence of human and lake needs great efforts of the whole society, which is, we not only protect lake ecosystems and make rational utilization of lake resources, but also conduct ecological restorations on the degraded ecosystems.

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