[Progresses of alpine treeline formation mechanism.]

Autor:	Cong Y; School of Geographical Sciences, Northeast Normal University, Changchun 130024, China., He HS; School of Geographical Sciences, Northeast Normal University, Changchun 130024, China.; School of Natural Resources, University of Missouri, Columbia, MO 65211, USA., Gu XN; School of Geographical Sciences, Northeast Normal University, Changchun 130024, China., Xu WR; School of Geographical Sciences, Northeast Normal University, Changchun 130024, China., Liu K; School of Geographical Sciences, Northeast Normal University, Changchun 130024, China., Zong SW; School of Geographical Sciences, Northeast Normal University, Changchun 130024, China., Du HB; School of Geographical Sciences, Northeast Normal University, Changchun 130024, China.
Jazyk:	čínština
Zdroj:	Ying yong sheng tai xue bao = The journal of applied ecology [Ying Yong Sheng Tai Xue Bao] 2016 Sep; Vol. 27 (9), pp. 3035-3041.
DOI:	10.13287/j.1001-9332.201609.010
Abstrakt:	Alpine treelines represent one of the most distinct vegetation boundaries between canopy closed montane forest and treeless alpine vegetation. This transitional ecotone is highly sensitive to global and regional climate change and is considered as an ideal indicator of such changes. Treeline studies have evolved from morphological description to various hypotheses of treeline formation. Although individual hypothesis may provide reasonable explanation locally, a generalized hypothesis that is applicable on the global scale is still lacking. Temperature is considered the limited factor controlling the distribution of alpine treeline as low temperature restricts biochemical processes of tree growth. However, which particular biochemical processes are affected by low temperature remains unknown. This paper summarized the mechanisms of treeline formation with a focus on how low temperature affects photosynthesis characteristics, nutrient characteristics, non-structural carbohydrate (NSC) and antioxidant system. We also reviewed the key issues and future perspectives in treeline research.
Databáze:	MEDLINE
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