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水热因子对塔里木河下游胡杨年轮指数和植被指数的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017年05期
Page:
85-91
Column:
研究论文
publishdate:
2017-09-30

Article Info:/Info

Title:
Effects of hydrothermal factors on vegetation index and tree-ring index of Populus euphratica in the lower reaches of the Tarim River
Article ID:
1000-2006(2017)05-0085-07
Author(s):
WANG Liangliang YE Mao* GAO Shengfeng GOU Xiaoxia XU Qiao ZHANG Tonggang
School of Geography Science and Tourism, Key Laboratory of Lake Environment and Resources in Arid Zone, Xinjiang Normal University, Urumqi 830054, China
Keywords:
Keywords:Populus euphratica tree-ring index GIMMS NDVI hydrothermal factor the lower reaches of Tarim River
Classification number :
S718
DOI:
10.3969/j.issn.1000-2006.201609005
Document Code:
A
Abstract:
【Objective】This study evaluated the relationships between tree growth and vegetation remote sensing data. 【Method】Based on the methods and theories of dendrochronology, we used tree-ring index of Populus euphratica, vegetation index(GIMMS NDVI), groundwater depth and meteorological data to analyze characteristics of tree-ring growth of P. euphratica and GIMMS NDVI in the lower reaches of the Tarim River. The correlations between hydrothermal factors, tree-ring index of P. euphratica, and GIMMS NDVI were also analyzed.【Results】 The tree-ring index of P. euphratica and GIMMS NDVI had declined due to vegetative degradation during 1980 and 2001 in the study region. The interannual change of GIMMS NDVI appeared a peak value. During vegetation growing season in the lower reaches of Tarim River, the vegetation growth was the most abundant between May and August while it was declined between January and April, and between September and December.【Conclution】 The tree-ring index of P. euphratica was significantly negatively correlated with groundwater depth in May and temperature in June(P<0.01). However, GIMMS NDVI was significantly negatively correlated with groundwater depth between May and July, and in October. There was a significant negative correlation between GIMMS NDVI and temperature in July. The correlation between the tree-ring index of P. euphratica and GIMMS NDVI was not significant(P<0.05). Thus, groundwater depth was a key factor for P. euphratica growth and GIMMS NDVI change in the lower reaches of the Tarim River.

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