Regeneration pattern of primary forest species across forest-field gradients in the subtropical mountains of Southwestern China.
Evergreen broad-leaved forest is now gradually degraded and fragmented, and there is an increase in the amount of habitat edges as a result of long-term human activity. However, the role of edges in the regeneration of primary forest species is poorly understood. After 20 years of the edge creation, we analyzed primary forest species distribution and abundance, and changes in floristic composition, vegetation structure across forest-field gradients in Ailao Mountain, SW China. Our results revealed that there was a higher abundance and richness of primary species, late secondary species and thorny lianas at the distances 0-50 m than at the distances more than 50 m from the edge into the forest exterior. At the distances >50 m, no individuals of dominant canopy trees Lithocarpus xylocarpus, Castanopsis wattii, and L. jingdongensis were found, whereas the abundance of early pioneer shrub species and herbaceous cover was significantly greater. The richness of primary species showed a decrease with increasing distances from the forest edge to the exterior, particularly of medium-seeded primary species showing a drastic decrease. Moreover, no large-seeded primary species occurred at the distances >60 m. This study indicates that the forest edge as a buffer zone may be in favor of primary species regeneration. A dense shrub and herb layer, and seed dispersal may be the major factors limiting the forest regeneration farther from the forest edge. Therefore, to facilitate forest recovery processes, management should give priority to the protection of buffer zones of this forest edge.
Li
Xiao-Shuang
XS
Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 650223, Kunming, China.
Liu
Wen-Yao
WY
Chen
Jun-Wen
JW
Tang
Cindy Q
CQ
Yuan
Chun-Ming
CM
D000531:Altitude; D044822:Biodiversity; D002681:China; D003247:Conservation of Natural Resources; D005843:Geography; D009929:Organ Size; D010802:Phylogeny; D063245:Plant Development; D018547:Plant Stems / Q000254:growth & development; D012639:Seeds / Q000033:anatomy & histology; D013045:Species Specificity; D014197:Trees / Q000145:classification* / Q000235:genetics / Q000254:growth & development*; D014329:Tropical Climate
Oecologia. 1994 Nov;100(1-2):200-202
28307045
Science. 1983 Jan 14;219(4581):187-9
17841688
Oecologia. 1991 Mar;86(1):70-75
28313160
Oecologia. 2008 Mar;155(3):529-37
18075760
Oecologia. 2001 Apr;127(2):281-286
24577661
Ecology. 2006 Feb;87(2):469-82
16637371