Recruitment pattern of tree populations along an altitudinal gradient : Larix chinensis Beissn in Qinling Mountains (China)

• Autorzy: Duan R. , Wang X. , Tu Y. , Huang M. , Wang C. , Zhu Z. , Guo H.
• Języki publikacji: EN

Abstrakty

EN

Larix chinensis Beissn is an endangered plant found only in the Qinling Mountains, Shaanxi, northwestern China. It is densely distributed in the alpine and subalpine belt on their highest peak Taibai Mountain. Age structure studies along a montane altitudinal gradient would be helpful in understanding the limiting factors on the regeneration of natural forests. The forest was divided into three transects, i.e., lower limit (2900-3000 m), mid-altitude (3100-3200 m) and upper limit (3300-3400 m). The age structures differed across altitude classes. The age structure in the low altitude transect was closed to bell-shaped and characterized by the dominance of adult trees. A reverse-J shape age structure was found in the mid-altitude transect. Multi-modal age distribution was found in the high altitude transect, and was caused by lack of young seedlings and saplings. This suggests that different limiting factors play important roles in shaping the age structure and forest regeneration at different altitudes. In the low altitude, light availability was probably the most important limiting factor. In the mid-altitudinal transect, density dependent intraspecific competition between trees likely controlled regeneration of L. chinensis. We suggest that limiting climatic factors, e.g. temperature, play an important role in determining the age structure of L. chinensis populations in highaltitude areas.

Słowa kluczowe

EN

age classes; altitudinal transect; Larix chinensis; light availability; limiting factor

PL

czynnik ograniczający; dostępność światła; klasa wieku; Larix chinensis; modrzew

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2009
• Tom: Vol. 57, nr 3
• Strony: 451--459
• Opis fizyczny: Bibliogr. 34 poz.,Rys., tab., wykr.,

Twórcy

autor

Duan R.

autor

Wang X.

autor

Tu Y.

autor

Huang M.

autor

Wang C.

autor

Zhu Z.

autor

Guo H.

• College of Life Science, Shaanxi Normal University, Xi'an 710062, PR China ; The Life Science Department of Anqing Teachers College, Anqing, Anhui 246011, PR China,

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