川西亚高山岷江冷杉和紫果云杉径向生长对气候因子的响应

doi:10.11707/j.1001-7488.20190701

摘要/Abstract

摘要： [目的]探讨川西亚高山地区各海拔生境处岷江冷杉和紫果云杉径向生长对气候因子的响应，为进一步揭示当地森林对气候变化的响应机制提供依据。[方法]分别获取王朗自然保护区中海拔与高海拔生境处岷江冷杉和紫果云杉的标准年表，分析年表同气候因子间的关系。[结果]中海拔生境处岷江冷杉生长在1990年后与年均气温存在一定程度的"分离效应"；中海拔生境处岷江冷杉和紫果云杉生长与上年生长季（上年7月和8月）气温和上年生长季末（上年10月）降水量显著负相关（P<0.05），岷江冷杉生长与当年9月气温和降水量显著负相关（P<0.05），紫果云杉生长与当年2、6月月均最低气温显著正相关（P<0.05）；高海拔生境处岷江冷杉和紫果云杉生长均与当年生长季前（上年11月、当年1月、当年2月）、当年生长季（当年7月）和上年生长季（上年6月）气温显著正相关（P<0.05），岷江冷杉生长还与当年6月份的降水量及上年8月份的气温显著负相关（P<0.05）；滑动相关分析和年表特征年气候分析结果充分印证了各年表对月气候因子响应的可靠性。[结论]上年生长季气温的"滞后效应"对中海拔生境处的岷江冷杉、紫果云杉以及高海拔生境处的岷江冷杉生长均有显著影响；近几十年来，上年生长季末降水对中海拔生境处的岷江冷杉、紫果云杉以及高海拔生境处的紫果云杉生长都具有稳定而显著的抑制作用。

关键词: 岷江冷杉, 紫果云杉, 径向生长, 气候因子, 响应

Abstract: [Objective] In order to provide a basis for further revealing the response mechanism of forest ecosystem to climate change in various subalpine areas of western Sichuan, the response relationships of radial growth for Abies faxoniana and Picea purpurea to climate factors at the same altitude and in the same habitatwere explored.[Method] The standard chronologies about A. faxoniana and P. purpurea at the middleand high altitudes in Wanglang Nature Reserve were obtained, and the relationships between the chronologies and climate factors were analyzed.[Result] There was a certain "abruption effect" between the fir radial growth and mean annual temperatures at the middle-altitude after 1990. In the middle-altitude habitat,the growth of both species were significantly negatively correlated with the temperature in the previous growing season (the current July and August) and the precipitation at the end of the current growing season (the current October) (P<0.05).The growth of A. faxoniana was significantly negatively correlated with the temperature and precipitation in the current September (P<0.05), and the growth of P. purpurea was significantly positively correlated with the monthly mean minimum temperature in the current February and current June (P<0.05).In the high-altitude habitat,the growth of both species were significantly positively correlated with the temperature before the growing season (the previous November, the current January and February). Moreover during the current growing season (the current July) and previous growing season (the previous June) (P<0.05).The growth of A. faxoniana was significantly negatively correlated with the precipitation in the current June and the temperature in the previous August (P<0.05). The reliability of the response of each chronology to the monthly climate factors was fully verified by the result of sliding correlation analysis and climate factors analysis.[Conclusion] The "lag effect" of temperature in the previous growing season had a significant effect on tree growth of A. faxoniana and P. purpurea in the middle-altitude habitat and A. faxoniana in the high-altitude habitat. In recent decades, the precipitation at the end of the previous growing season had a significant and stable inhibition effect on tree growth of A. faxoniana and P. purpurea in the middle-altitude habitat and P. purpurea in the high-altitude habitat.

Key words: Abies faxoniana, Picea purpurea, radial growth, climate factors, response

中图分类号:

赵志江, 郭文霞, 康东伟, 崔莉, 赵联军, 李俊清. 川西亚高山岷江冷杉和紫果云杉径向生长对气候因子的响应[J]. 林业科学, 2019, 55(7): 1-16.

Zhao Zhijiang, Guo Wenxia, Kang Dongwei, Cui Li, Zhao Lianjun, Li Junqing. Response of Radial Growth of Abies faxoniana and Picea purpurea to Climatic Factors in Subalpine of Western Sichuan[J]. Scientia Silvae Sinicae, 2019, 55(7): 1-16.

图/表 3

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