5篇
您的检索式：作者名="Changhui L"
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| 1 | Effects of the frequency and the rate of N enrichment on community structure in a temperate grassland显示文摘Aims Nitrogen(N)enrichment caused by human activities threatens bio-diversity and alters plant community composition and structure.It has been found that heavy and infrequent N inputs may over-estimate species extinction,but it remains unclear whether plant community structure will equally respond to frequent reactive N enriched conditions.Methods We independently manipulated the rates and the frequencies of N addition in a temperate steppe,northern China,between 2008 and 2013.Important Findings We found that plant community structure changes,measured by‘Euclidean distance’involving species richness,composition and productivity,were significantly positively related to increasing N enrichment rates rather than frequencies.Changes in aboveground net primary productivity(ANPP),plant species richness and shifts in dominant species were observed.Community ANPP increased with N enrichment,whereas species richness reduced.The frequency of N enrichment increased species richness but had no impacts on community ANPP and the relative ANPP of the two dominant spe-cies,C3 perennial bunchgrass Stipa grandis and C3 perennial rhi-zome grass Leymus chinensis.The ANPP and relative ANPP of the two dominant species were significantly negatively correlated with each other.Moreover,changes in the relative ANPP of S.grandis was negatively associated with the changes in community structure.After 5 years’treatment,direct influence of the frequency of N en-richment on plant community structure was not observed,but the effects of the rate of N enrichment were apparent.Our results sug-gested that further study in various ecosystems and with long-term and well-controlled comparisons the frequency vs.the rate of N enrichment may still be needed. | Yunhai Zhang Jing Wang Carly J.Stevens Xiaotao Lü Nianpeng He Changhui Wang Xingguo Han | 2018 | Journal of Plant Ecology2018，11，5： | 2 |
| 2 | Regulation of polar auxin transport by AtPIN1 in Arabidopsis vascular tissue 显示文摘 | Galweiler L Changhui G Muller A | 1998 | Science1998，282，： | 1 |
| 3 | Allele frequencies of 15 STRs in five ethnic groups (Han, Gelao, Jing, Shui and Zhuang) in south China显示文摘 | Linlin Y Yanchao Z Changhui L | | Forensic Sci Int Gene0，7，1： | 1 |
| 4 | Regulation of polar auxin transport by AtPIN1 in Arabidopsis vascular tissue 显示文摘 | Galweiler L Guan Changhui Muller A | 1998 | Science1998，282，5397： | 1 |
| 5 | Measuring statistical error of Shack-Hartmann wavefront sensor with discrete detector arrays 显示文摘 | XIAN L C RAO Hao JIANG Changhui | 2008 | Journal of Modem Optics2008，55，14： | 1 |
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