福建农林大学学报（自然科学版）2012，Vol.41Issue(2)：176-182,7.
退化红壤恢复过程中灌木层主要种群的生态位
Niche of dominant populations in the shrub layer of restored communities in degraded red soil
摘要
Abstract
The quantity and niche characteristics of populations in the shrub layer of five communities at different successional stages were researched. Three measures were used to promote forest restoration such as tree planting ( P2 ) , grass planting ( P, ) and shrub planting ( P4 ) in the degraded red soil region of western Fujian Province. The two control plots, unrestored region ( P,) and secondary forest ( P5 ) were left undisturbed. The results showed that all the artificially aided restoration patterns showed varying degrees of species diversity improvement over the control (P( ) group. The niche breadth values (B(mii) measured by Shannon-Wiener index of most populations were narrow, and the B(m)I values of 60.38% populations were zero, as each of them occupied only one resource and most of them only occupied P5. In the contrast, the niche breadth values of Gardenia jasminoidai. Ilex asprella, Toxicodenddron sylvestre and Pinus massoniana were wide, with Bim)I values greater than 0.5. This suggested that the resource status of P, - P4 was insufficient, as it would not be completely utilized for succession populations. There were complex nonlinear relationships between the population niche overlap value (M?a) measured by Pianka index and the niche breadth, occupied resource niche, probability of meeting together at same niche, important value, value distribution for species pairs, most of species pairs having wide niches possessed high niche overlap value ( NOU > 0.5 ). All the species pairs having narrow niches possessed a lower niche overlap value (/Voa <0.3) , species pairs having other niches possessed varied niche overlap values (from 0 to 1).关键词
退化红壤/生态恢复/生态位Key words
degraded red soil/ vegetation restoration/ niche分类
农业科技引用本文复制引用
蓝良就,黄炎和,李德成,林金石..退化红壤恢复过程中灌木层主要种群的生态位[J].福建农林大学学报（自然科学版）,2012,41(2):176-182,7.基金项目
国家十一五科技支撑计划资助项目(2009BADC6B006). （2009BADC6B006）
