干旱区生态环境知识资源中心(Arid): 塔里木盆地南缘旱生芦苇生态特征与水盐因子关系

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	塔里木盆地南缘旱生芦苇生态特征与水盐因子关系
其他题名	Ecological characteristics of Phragmites australis and their relationship to water- salt indicators in dry habitats of the southern marginal zones of the Tarim Basin, China
	贡璐; 朱美玲; 塔西甫拉提·特依拜; 张雪妮; 韩丽; 解丽娜
来源期刊	生态学报
ISSN	1000-0933
出版年	2014
卷号	34 期号:10 页码:2509-2518
中文摘要	选择位于塔里木盆地南缘极端干旱区的克里雅河流域于田绿洲为靶区,结合经典统计学和冗余分析技术,研究了旱生芦苇生态特征与水盐因子的分布规律及相互关系。统计学分析显示:芦苇沿河岸至荒漠方向株高、盖度和地上生物量减少、地下生物量增加,水分与土壤盐分也呈现一定的梯度变化规律。冗余分析结果表明:水分为芦苇生态特征变化的关键驱动因子,地下水埋深和土壤水分与芦苇的生态特征呈现极显著的相关关系,钠吸附比、全盐与芦苇的生态特征呈现显著的相关关系,其他指标与芦苇生态特征的相关性均不显著。水盐因子对芦苇生态特征影响的重要性排序为地下水埋深>土壤水分>钠吸附比>全盐>HCO_3~->pH值>Cl~-/SO_4~(2-)。综合水盐要素,水分对芦苇生态特征的影响大于盐分。
英文摘要	In recent years, ecologists have experienced an increased awareness of the importance of plant-environment interactions. Studies have demonstrated that spatial ecosystem heterogeneity and availability of resources influence plant growth. Understanding the ecological response characteristics of plants and environmental laws influencing arid land vegetation in different water-salt environments should be quite valuable to scientists. To better understand the ecological characteristics of plants and factors that potentially control them such as water availability and salinity in arid regions, we conducted a study in Phragmites australis in dry habitats of the Yutian Oasis along the Keriya River, in the southern marginal zones of the Tarim Basin, Xinjiang, China. Using previously collected observational data related to water-salt distribution laws and the natural water-salt gradient caused by distance from the river, four sample regions were established parallel to the river from east to west, extending from the river to the desert. We analyzed the patterns and correlations of ecological characteristics of Phragmites australis and water-salt indicators in the field, using traditional statistics and redundancy analysis (RDA) in combination with CANOCO software (version 4.5). The statistical analysis revealed that plant ground cover was as low as less than 10%; the belowground biomass was greater than aboveground because of the way desert vegetation adapted to the arid environment. The sampled region was severely dry and salinated; soil moisture content was low, with a mean value of 7.22%. The average depth to ground water was 4.23m and soil salt content reached as high as 18.24g/ kg. Phragmites australis has a high tolerance to aridity and salt stress; the average plant height, coverage and aboveground biomass decreased gradually while the belowground biomass increased as distance from the river to the desert increased; there were also concurrent and expected gradient changes in water-salt indicators. Redundancy analysis showed that water was the key environmental factor influencing the growth of Phragmites australis. A significant correlation was found between ground water depth/ soil moisture and the ecological characteristics of Phragmites australis including plant height, coverage, biomass; the sodium adsorption ratio (SAR) / total salt correlation with ecological characteristics was less significant while other indicators had no significant correlation with the plant’s ecological characteristics. The importance of water-salt indicators to ecological characteristics of Phragmites australis could be arranged as ground water depth > soil moisture > SAR > total salt > HCO_3~- > pH > Cl~- / SO_4~(2-). The results suggest that water has greater impact on Phragmites australis than salt, because water limits the plant’s survival, growth and reproduction. When a plant is affected by an arid continental climate for long periods, the plant is usually influenced by both water and salt. Any study of Phragmites australis analyzing the effects of different water or soil salinity conditions independently would be fatally flawed; but must be considered together. Our study shows that redundancy analysis of ordination methods can be beneficially used in research into the relationship between plants and environmental factors; when combined with traditional statistics, the two methods can provide comprehensive information. The redundancy analysis can effectively reveal relationships between ecological characteristics of plants and water-salt indicators. The characteristics of Phragmites australis deserve more research, especially research related to the microscopic physiological effects of water-salt interaction.
中文关键词	芦苇 ; 冗余分析 ; 塔里木盆地南缘 ; 水盐因子 ; 极端干旱区
英文关键词	Phragmites australis redundancy analysis southern Tarim Basin water-salt indicators extremely arid areas
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5154736
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231581
作者单位	新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	贡璐,朱美玲,塔西甫拉提·特依拜,等. 塔里木盆地南缘旱生芦苇生态特征与水盐因子关系[J]. 新疆大学,2014,34(10):2509-2518.
APA	贡璐,朱美玲,塔西甫拉提·特依拜,张雪妮,韩丽,&解丽娜.(2014).塔里木盆地南缘旱生芦苇生态特征与水盐因子关系.生态学报,34(10),2509-2518.
MLA	贡璐,et al."塔里木盆地南缘旱生芦苇生态特征与水盐因子关系".生态学报 34.10(2014):2509-2518.