cje ›› 2012, Vol. 31 ›› Issue (08): 1917-1923.
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CHAI Zong-zheng, WANG De-xiang**, ZHANG Li-nan, ZHANG Yang, HUANG Qing-ping, WU Hao
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Abstract: By using Levins and Hurlbert formulae of niche breadth and Pianka formula of niche overlap, this paper analyzed the niche characteristics of 20 trees and 26 shrub populations in natural Pinus tabulaeformis communities in Qinling Mountains. In canopy layer, P. tabulaeformis, Quercus aliena var. acutiserrata, P. armandii, and Toxicodendron vernicifluum were the dominant populations; in shrub layer, the dominant populations were Corylus heterophylla, Euonymus alatus, Lonicera japonica, and Viburnum dilatatum. The dominant populations in canopy layer had the largest niche breadth, and were the main body of the communities; while the V. dilatatum, Elaeagnus pungens, E. alatus, and C. heterophylla in shrub layer had a larger niche breadth than the other populations. In canopy layer, there was a lower niche overlap between the dominant populations, but the Populus purdomiiDendrobenthamia anguwstata, Rhus chinensisPopulus davidiana, and Populus simoniiBetula platyphylla had a higher niche overlap. In shrub layer, more dominant populations appeared niche overlap, and E. alatus-E. schensianus, Spiraea salicifoliaLonicera japonica, Cotinus coggygria var. glaucophylla-Smilax scobinicaulis, and Rhododendron lapponicum-Salix cathayana showed a larger niche overlap. The dominant populations in the communities had a larger niche breadth and a higher niche overlap with other populations, but no positive correlation was observed between the niche breadth and niche overlap.
Key words: Brassica campestris, winter rapeseed, safety wintering, division, economic benefit.
CHAI Zong-zheng, WANG De-xiang**, ZHANG Li-nan, ZHANG Yang, HUANG Qing-ping, WU Hao. Niche characteristics of main plant populations in natural Pinus tabulaeformis communities in Qinling Mountains, Northwest China.[J]. cje, 2012, 31(08): 1917-1923.
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URL: https://www.cje.net.cn/EN/abstract/abstract20247.shtml
https://www.cje.net.cn/EN/Y2012/V31/I08/1917