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Shunli Yu

Publications and source records attributed to Shunli Yu.

3 recordsLinked to original sources

Potentials for combating desertification in Hunshandak Sandland through nature reserve.

Desertification directly threatens more than 250 million people and one third of the earth's land surface. Although it is well known that desertification could be reversed in most cases if the intensity of land use were reduced, there have been no studies on how to achieve this reversed desertification on a large scale. We conducted a case study in Hunshandak Sandland of North China, exploring how creation of a nature reserve might aid restoration of a degraded ecosystem. Experimental data indicated that desertified regions, if designated as a nature reserve, could be restored with conservation of biodiversity. The buffer zones in moderately desertified lands could serve as a base for forage production and/or ecotourism industry. The construction of ecologically designed towns (ecotowns) in transition zones could accommodate migrants moved from core zones so as to develop stock production, related industry, and ecotourism, enabling both economic and environmental development. Up to now, 5778 local inhabitants in the core zones of Zhenglan Banner (county) in the Hunshandak Sandland have been moved out of the severely degraded areas with the financial assistance of the central government. Those people have been moved into three eco-towns of the Banner with an objective of greatly enhancing the economic and social status while restoring the degraded sandlands.

Biodiversity↗

[Analysis on leaf forms in Quercus mongolica community].

Leaf-size classes of 337 vascular plants in Quercus mongolica community in northeast, China were analyzed according to Raunkiaer system. The dominant type was microphyll which percentage is 45.4%, followed by compound leaf (23.1%), mesophyll (22.6%), nanophyll (6.8%), macrophyll (0.9%), aphyllous (0.9%), leptophyll (0.3%). The leaves edges of 337 plants were investigated and the percentage of entire leaves plants is 22.3%. Leaf-size classes spectra of trees, shrubs and herbs were figured out. The mesophyll ratio in trees was higher than that in shrubs and herbs. The mesophyll ratio in shrubs was the lowest. Different sites had different leaf-size classes spectra. Microphyll also was the dominant type in every site. No significant relationships were found between leaf-size classes spectra and latitude and altitude.

Altitude↗

[Neighbor diversity and interspecific association of Quercus mongolica].

Neighbor diversity and interspecific association of Quercus mongolica were studied through point sample method. With the increase of plots number, species richness and Shannon-Wiener (H') diversity index increased. At last they came close to fixed value. LS value (average number of neighboring species) was first introduced in this article. Different sits had different PC value (value of interspecific association). According to PC value and LS value, accompany tree and shrub species of Quercus mongolica were determined. The similar environmental requirement and mutualism were the main reason why they live together. The result of interspecific association between Quercus mongolica and other species in 4 locations was analyzed. The reason why the differences existed was that Quercus mongolica studied was in different succession stages.

Ecosystem↗