存档

2017年7月 的存档

Dr. Xiao Hai-feng published paper in Soil Biology & Biochemistry

2017年7月7日 评论已被关闭

Understanding mechanisms of successful colonization by exotic plant species in non-native habitat is critical to meet long-term restoration aims. Previous studies demonstrated that overgrowing plants can alter resources, especially soil inorganic nitrogen availability and get benefits from positive feedback. However, comprehensive knowledge on particular mechanisms underlying their successful colonization remains unclear.

Soil ecology group researchers Dr. Haifeng Xiao and Prof. Xiaodong Yang combined field examinations and laboratory manipulations to investigate significant impact of overgrowing Ageratina adenophora on soil NO3-N availability and nitrification. Interestingly, they found significant enhancement in soil total N, NO3-N, pH, potential nitrification rates, and ammonia oxidizing bacteria (AOB), while reduced abundance of ammonia oxidizing archaea (AOA) under the influence of A. adenophora. Notably, AOB abundance was positively correlated with both pH and soil potential nitrification rates. AOA abundance was negatively correlated with pH and had no significant correlation with soil nitrification potential. Both AOA and AOB communities significantly differed between populated and non-populated soils. It is worth mentioning here that pH was the strongest factor contributing to this community difference. Results also showed that A. adenophora has strong long-term preference for nitrate which can further increase soil pH. Their data clearly helps to gain insight into a probable mechanism indicating that A. adenophora stimulates nitrification with the help of AOB rather than AOA under relatively higher soil pH condition.

This study, titled:pH drives ammonia oxidizing bacteria rather than archaea thereby stimulate nitrification under Ageratina adenophora colonization, was published in international journal “Soil Biology & Biochemistry”. This work was supported by the CAS 135 program (XTBG-T01), CAS “Light of West China” Program and the National Science Foundation of China (NSFC) grant (31200409).

Fig. 1. (a) A. adenophora populated area, (b) nonpopulated area nearby.

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Mr LIN Xiao-bing successfully finished his master thesis defense

2017年7月7日 评论已被关闭

On June 1, 2017, Mr LIN Xiao-bing successfully finished his master thesis defense with title of The effect of different rubber plantation on termite community structure and diversity distribution in Xishuangbanna. His study explored the effects of rubber plantation on termite community structure and diversity. The results showed that after the natural forest changed to rubber plantation, the diversity and rare species composition of termites significantly decreased, and also termite feeding group changed greatly.

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Professor Yang visited Kasetsart University, Suranaree university of science and technology and Mo singto 30-ha Forest Dynamic Plot

2017年7月7日 评论已被关闭

During 20th-26th, February, 2017, Professor Yang with Professor Peng Yan-qiong, Lin Lu-xiang and other collegues visited Forest College in Kasetart University, Suranaree university of science and technology, and Mo Singto 30-ha forest dynamic plot and discussed cooperation issue in 2017. And interviewed a student from Foresty college in Kasetsart University for Master Degree in Soil Ecology Group, XTBG, CAS.

 

 

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Professor Yang visited Southwest University

2017年7月7日 评论已被关闭

During 21th-24th, December, 2016, Professor Yang and Doctor Xia visited Professor He xin-hua’s research group and Zhang zhi-shen’s research group in Southwest University. Discussed cooperation potential for mycorrhizal fungi study and soil animal study.

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Dr. Marc-André SELOSSE visited Soil Ecology Group

2017年7月7日 评论已被关闭

On November 30, 2016, Doctor Marc-André SELOSSE, work in Muséum national d’Histoire naturelle, visited Soil Ecology Group and have a short chat with all soil group collegues and students. Professor Yang given a presentation about SEG. SELOSSE was interested in soil biota study of longitude 101 climate gradient plots and discussed cooperation potential in future.

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