[Contribution of soil seed bank to the regeneration of damaged vegetation on floodplain].
A field germination experiment of soil seed bank was carried out on two typical floodplains in the lower reaches of Tarim River, and a comparison was made between the soil seed banks and corresponding seedling banks on the two floodplains, aimed to assess the contribution of soil seed bank to the regeneration of damaged vegetation. The results showed that there were 12 plant species in the soil seed banks, and the life forms were mainly perennial herbs and shrubs. The soil seed banks had a density of 282.5 seeds m(-2) and 173.2 seeds x m(-2), and the seeds in top soil (0-2 cm) accounted for 76.9% and 71.0% of the total, respectively. The soil seed banks had significant effects on the seedlings species composition and density, and 84.7% and 99.4% of the seedlings on the two floodplains were emerged from corresponding soil seed banks. The similarity coefficient between soil seed bank and seedling bank of the two floodplains was 0.72 and 0.63, respectively, and there existed significant positive correlation between seedling density and soil seed bank density, illustrating that soil seed bank made important contribution to the natural regeneration of vegetation.
Wang
Zeng-ru
ZR
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China. surgeriver@gmail.com
Xu
Hai-liang
HL
Yin
Lin-ke
LK
Li
Ji-mei
JM
Zhang
Zhan-jiang
ZJ
Li
Yuan
Y
D002681:China; D003247:Conservation of Natural Resources; D003889:Desert Climate; D017753:Ecosystem; D004784:Environmental Monitoring; D055868:Floods; D018525:Germination / Q000502:physiology*; D063245:Plant Development; D012038:Regeneration; D045483:Rivers; D012639:Seeds / Q000254:growth & development*; D012987:Soil / Q000032:analysis*
D012987:Soil