Arid
DOI10.1111/j.1654-1103.2010.01199.x
Effect of climate on the growth of annual rings in the main roots of perennial forbs in an Inner Mongolian semi-arid grassland, China
Liu, Yong-Bo1,2; Zhang, Qi-Bin1
通讯作者Zhang, Qi-Bin
来源期刊JOURNAL OF VEGETATION SCIENCE
ISSN1100-9233
EISSN1654-1103
出版年2010
卷号21期号:5页码:899-907
英文摘要

Question


Is there a pattern in growth of annual rings in roots of perennial forbs in relation to climate and climate extremes in grassland ecosystems?


Location


Semi-arid grassland in Duolun (42 degrees 27’N, 116 degrees 41’E, 1380 m a.s.l.), central Inner Mongolia, China.


Methods


Main roots of three perennial species, Potentilla anserina L., Cymbaria dahurica L. and Lespedeza daurica Schindl., were sampled. Cross-sections (10-15-mu m thick) were produced from the proximal end of sampled roots using a sledge microtome. Annual growth rings in the main roots were identified and measured by differentiating between earlywood and latewood in the secondary xylem. Relationships between annual growth rings and monthly mean temperature and total monthly precipitation were identified using correlation analysis. Differences in an annual ring width to the previous and following years were examined by calculating a distinctness score.


Results


The three perennial forbs showed clearly demarcated annual growth rings in all individuals and the same fluctuation patterns. Their ring widths were generally positively correlated with precipitation from April to October (except for August) and with temperature from February to June (except June for L. daurica), September to October, and the annual mean. Strong deviations of annual ring widths from their neighbour rings were observed in 1998 and 2000. The trend of absolute distinctness scores (D-m) increased significantly from 1988 to 2003, indicating an increase in the frequency of annual ring width variation.


Conclusions


Annual growth rings in the main roots of three perennial forb species can be used as an indicator of the influence of climate on below-ground grassland growth. The change in below-ground conditions and effects on the functioning of grassland should receive more attention in future studies.


英文关键词Annual growth rings Belowground ecological process Climate extremes Inner Mongolian grassland Perennial forbs
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000281551000009
WOS关键词NET PRIMARY PRODUCTION ; TERRESTRIAL ECOSYSTEMS ; REGIONAL CLIMATE ; MODEL INTEGRATIONS ; CARBON ALLOCATION ; EXTREME RAINFALL ; LEYMUS-CHINENSIS ; FUTURE CHANGES ; GLOBAL CHANGE ; PRODUCTIVITY
WOS类目Plant Sciences ; Ecology ; Forestry
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/165516
作者单位1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China;
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Liu, Yong-Bo,Zhang, Qi-Bin. Effect of climate on the growth of annual rings in the main roots of perennial forbs in an Inner Mongolian semi-arid grassland, China[J],2010,21(5):899-907.
APA Liu, Yong-Bo,&Zhang, Qi-Bin.(2010).Effect of climate on the growth of annual rings in the main roots of perennial forbs in an Inner Mongolian semi-arid grassland, China.JOURNAL OF VEGETATION SCIENCE,21(5),899-907.
MLA Liu, Yong-Bo,et al."Effect of climate on the growth of annual rings in the main roots of perennial forbs in an Inner Mongolian semi-arid grassland, China".JOURNAL OF VEGETATION SCIENCE 21.5(2010):899-907.
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