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Journal of Arid Land  2012, Vol. 4 Issue (4): 457-468    DOI: 10.3724/SP.J.1227.2012.00457
Research Articles     
Spatial distribution pattern of Picea schrenkiana population in the Middle Tianshan Mountains and the relationship with topographic attributes
YuTao ZHANG1, JiMei LI1, ShunLi CHANG2, Xiang LI1, JianJiang LU1
1 Institute of Forest Ecology, Xinjiang Academy of Forestry, Urumqi 830000, China;
2 Key Laboratory of Oasis Ecology of Ministry of Education, Xinjiang University, Urumqi 830046, China
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Abstract   The spatial distribution of plant populations is an important feature of population structure and it de-termines the population’s ecological preferences, biological characteristics and relationships with environmental factors. The point pattern analysis method was adopted to study the distribution pattern of Picea schrenkiana indi-viduals of different size classes and the correlations between two size classes as well as the impact of topog-raphical attributes on the population distribution. With increasing diameter at breast height, the plant density of the P. schrenkiana population showed a declining trend. Old trees showed a random distribution at a small spatial scale (0–12 m), whereas saplings, small trees and big trees all had an aggregated distribution at all scales. With the increase of tree age, the scales at which maximal aggregation occurred gradually increased and the aggregation strength decreased. At a small scale (0–16 m), all size classes showed a negative correlation and the larger the difference between tree size, the more significant the negative correlation. The number of medium, big and old trees had a significantly positive correlation with elevations, whereas the number of saplings and small trees was not significantly correlated with elevations. The numbers of saplings, small and medium trees showed a significant positive correlation with slope gradient, whereas the number of big trees was not significantly correlated, and the number of old trees was negatively correlated with gradient. With the exception of old trees, saplings, small, me-dium and big trees showed negative correlations with convexity index. The study provides a theoretical basis for the conservation, rehabilitation and sustainable management of forest ecosystems in the Tianshan Mountains.

Key wordscaper      chlorophyll      drought      petal micromorphology      starch      sugars     
Received: 09 March 2012      Published: 15 December 2012

The 12th Five-year Science and Tech-nology Support Program (2011BAD38B0505), the Forestry Industry Research Special Funds for Public Welfare Projects (200804022C).

Corresponding Authors: YuTao ZHANG     E-mail:
Cite this article:

YuTao ZHANG, JiMei LI, ShunLi CHANG, Xiang LI, JianJiang LU. Spatial distribution pattern of Picea schrenkiana population in the Middle Tianshan Mountains and the relationship with topographic attributes. Journal of Arid Land, 2012, 4(4): 457-468.

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