摘要
基于５１个样点３３０５个样方地面藓类的盖度，应用双向指示种法，将长白山主要生态系统中地面藓类群落分成落叶松沼泽、高山苔原、岳桦林、亚高山过渡林、暗针叶林及红松阔叶林６种类型，这６种生态系统中的地面藓类总盖度分别为８０．９４％、２５．４２％、５９．８３％、２６．８８％、４４．１１％和１．６７％．在调查的５１个样点中，随着土壤ｐＨ值下降、含水量上升，地面藓类群落盖度增加，在苔原带以下红松阔叶林以上的森林中，随着冠层郁闭度加大，林下地面藓类盖度下降．地面藓类的生态位宽度（Ｂ）与种数（Ｎ）的关系符合Ｎ＝７４．６４７５×ｅ－２０．６７０５×Ｂ，除塔藓等少数种类外。
Based on the coverages of 86 moss species in 51 sites with 3305
samples on ground in Changbai Mountains, six groups of sites including Larix gmelinii bog,
turdra, Betula ermanii forest, transitional forests in sub alpine, dark conifer forest and
Pinus koraiensis broad leaved mixed forest were identified using TWINSPAN. The total moss
coverage of Larix gmelinii bog, tundra Betula ermanii forest, transitional forests in sub
alpine, dark conifer forest, and Pinus koraiensis broad leaved mixed forest were 26.88%, 80.
94%, 25.42%, 59.83%,44.11% and 1.67%, respectively. With the decline of pH and the increase
of soil water content, the total moss coverage increased. In the forests between tundra and
Pinus koraiensis broad leaved mixed forest, the total moss coverage declined with the
canopy coverage. The relationship between the species number (N) and their niche breadth (B)
for 86 moss species in 51 sites followed the model: N=74.6475×e -20.6705×B . It
indicates that the most moss species in Changbai Mountains had very narrow niches.
出处
《应用生态学报》
CAS
CSCD
1999年第3期270-274,共5页
Chinese Journal of Applied Ecology
基金
中国科学院资源与生态环境研究重点项目
中国科学院长白山森林生态系统定位研究站资助项目
