干旱区生态环境知识资源中心(Arid): 荒漠植物梭梭稳定碳同位素组成与环境因子的关系

Arid

	荒漠植物梭梭稳定碳同位素组成与环境因子的关系
其他题名	Relationship of stable carbon isotope composition with environmental factors in the desert plant, Haloxylon ammodendron
	赵丹; 程军回; 刘耘华; 刘利利; 李瑞霞; 盛建东
来源期刊	生态学报
ISSN	1000-0933
出版年	2017
卷号	37 期号:8 页码:2743-2752
中文摘要	以广泛分布于新疆荒漠地区的建群种植物梭梭(Haloxylon ammodendron)为研究对象,通过对23个样地101份梭梭同化枝样品delta~(13)C值的测定,分析了梭梭稳定碳同位素组成的变化特征及其与环境因子(海拔、日照时数、潜在蒸散量、年平均降水量和年平均温度)的关系,并讨论了不同生境下梭梭同化枝delta~(13)C值的变化特征。研究结果显示:(1)梭梭同化枝delta~(13)C平均值为-14.15,其在95%置信区间的变化范围为-13.1415.38,表明梭梭是C_4光合途径的植物。(2)梭梭同化枝delta~(13)C值与年平均降水量和年平均温度呈显著负相关关系,而与日照时数、潜在蒸散量和海拔呈显著正相关关系。我们推测梭梭同化枝 delta~(13)C值对各环境因子响应趋势的不同,可能是由气孔限制因素造成的,它是梭梭适应干旱荒漠环境的一种策略。(3)在不同生境下,梭梭同化枝的碳同位素组成存在显著差异。当梭梭群落中的主要伴生种为白刺、红砂时,其delta~(13)C值最高,当主要伴生种为沙拐枣和假木贼时,其delta~(13)C值最低。在灰漠土与灰棕漠土样地中的梭梭delta~(13)C值高于棕钙土、风沙土、石质土样地;盆地中梭梭同化枝delta~(13)C值低于平原、山地、丘陵地形条件下的样地。以上结果表明:梭梭水分利用效率在不同环境梯度和生境中,存在着显著不同,表现出显著的适应策略差异。
英文摘要	Haloxylon ammodendron is a dominant shrub widely distributed in the desert in the Xinjiang Uygur Autonomous Region, northwest China. In the present study, we investigated the variation in the stable carbon isotope composition(delta~(13)C) in an assimilating branch of H. ammodendron and the relationship of delta~(13)C from H. ammodendron with environmental factors ( altitude,duration of sunshine,evaporation,mean annual precipitation,and mean annual temperature) using a dataset collected from 101 communities and 23 ecosystem sites. Our results showed that: (1) delta~(13)C in the assimilating branch of H. ammodendron averaged 14.15 with a range from-13.14 to-15.38 at a 95% confidence interval, which indicated that H. ammodendron was characterized by a C_4photosynthetic pathway. (2) Along an environmental gradient, delta~(13)C values of H. ammodendron was negatively and significantly correlated with mean annual precipitation and mean annual temperature, but positively correlated with altitude, duration of sunshine, and evaporation. We inferred that the different response patterns of delta~(13)C values to environmental factors were possibly caused by stomatal limitation in the assimilating branch of H. ammodendron, which was considered an adaptation to the dry desert conditions. (3) delta~(l3)C values of H. ammodendron varied significantly among different habitats. The highest delta~(13)C values appeared when H. ammodendron was found with Nitraria tangutorum and Reaumuria Linn, in grey and grey-brown desert soils, and distributed in plain, mountainous and hill habitats, whereas the lowest delta~(l3)C values were observed when H. ammodendron was found with Ceratoides arborescens and Calligonum mongolicum located in aeolian sandy and chisley soils, and distributed in Junggar Basin. Together, our results demonstrated that water use efficiency of H. ammodendron varied significantly along environmental gradients and habitats,indicating a divergent adaptation strategy for water use efficiency.
中文关键词	稳定碳同位素值 ; 环境因子 ; 生境条件 ; 梭梭
英文关键词	stable carbon isotope environmental factors habitat Haloxylon ammodendron
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:5974119
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236468
作者单位	新疆农业大学草业与环境科学学院, 新疆土壤与植物生态过程重点实验室, 乌鲁木齐, 新疆 830052, 中国
推荐引用方式 GB/T 7714	赵丹,程军回,刘耘华,等. 荒漠植物梭梭稳定碳同位素组成与环境因子的关系[J]. 新疆农业大学,2017,37(8):2743-2752.
APA	赵丹,程军回,刘耘华,刘利利,李瑞霞,&盛建东.(2017).荒漠植物梭梭稳定碳同位素组成与环境因子的关系.生态学报,37(8),2743-2752.
MLA	赵丹,et al."荒漠植物梭梭稳定碳同位素组成与环境因子的关系".生态学报 37.8(2017):2743-2752.