干旱区生态环境知识资源中心(Arid): 内蒙古地带性针茅植物对CO

Arid

	内蒙古地带性针茅植物对CO_2和气候变化的适应性研究进展
其他题名	Advances in the adaptability of zonal Stipa plants to CO_2 and climate change in Inner Mongolia
	蒋延玲; 周广胜; 王玉辉; 王慧; 石耀辉
来源期刊	生态学报
ISSN	1000-0933
出版年	2015
卷号	35 期号:14 页码:4559-4569
中文摘要	收集了19922013年关于模拟CO_2浓度升高及气候变化(温度升高、降水变化)对内蒙古地带性草原群落的5个建群种针茅植物(贝加尔针茅、本氏针茅、大针茅、克氏针茅、短花针茅)影响的实验研究结果表明,模拟CO_2浓度升高、增温和增雨将提高针茅植物的光合作用和株高生长,但CO_2处理时间延长会导致光合适应;温度和降雨变化将改变针茅植物的物候进程,但物种之间反应有差异;CO_2浓度升高有助于针茅植物生物量增加,增温和干旱则相反,CO_2浓度升高对干旱的影响具有补偿作用;干旱和涝渍胁迫将提高针茅植物植株C/N,CO_2浓度升高将加剧水分胁迫下针茅植物植株C/N的增加效应,导致牧草品质下降。由于当前在适应性指标、针茅植物对气候变化协同作用的适应机理及其敏感性研究等方面存在的不足,导致目前无法全面比较各针茅植物对CO_2和温度、降水变化的响应差异及其敏感性,因而无法预测未来在全球变化背景下,这几种针茅植物的动态变化及其在地理分布上的迁移替代规律。为科学应对气候变化,未来应加强内蒙古地带性针茅植物的适应性指标、针茅植物对多因子协同作用的适应机理及敏感性研究。
英文摘要	Stipa plants, distributed in arid and semi-arid regions, are sensitive to drought caused by the decrease of precipitation and changes of other climatic factors. What the effects of global change on Stipa plants were studied would help to understand the response and adaptability of zonal steppe plants to global change in Inner Mongolia. The impacts of elevated CO_2,warming and precipitation change on five zonal and constructive Stipa species (S. Baicalensis,S. bungeana, S. grandis, S. krylovii and S. breviflora) in Inner Mongolia were reviewed based on simulating experimental results from 1992 to 2013. The main objective is to reveal the response and adaptation mechanism of the zonal Stipa plants to CO_2 and climate change in Inner Mongolia,and we hope to provide sound knowledge for further studying the effects of global change on the zonal Stipa plants. Increasing CO_2 concentration, temperature and precipitation all enhanced the photosynthesis and height of Stipa plants, while the plant photosynthetic acclimation would appear with the processing time longer of CO_2 treatment. Temperature and precipitation changes would affect the phenological process of Stipa plants,but the responses to temperature and precipitation change were different among different species. Elevated CO_2 increased and warming and drought decreased the biomass of Stipa plants. Elevated CO_2 could alleviate the effect of drought on plant photosynthesis and growth. Drought and water logging stress increased C/N of Stipa plants, and elevated CO_2 would aggravate the C/N of Stipa plants under drought. Therefore, the forage quality would decrease. Although many simulations of the adaptability of zonal Stipa plants to CO_2 and climate change in Inner Mongolia had been done,there were still a lot of insufficiencies as follows: (1) Lack of study on the adaptability indexes: Many researches focus on the responses of the physiological ecology, structural and functional characteristics of Stipa plants to CO_2 and climate change. But the relationships among the same and different indexes of all the five Stipa species were not studied and too many indexes were used to studying the adaptability to global change,and it is very difficult to find the representative and indicative adaptability indexes in the responses of Stipa plants to global change. So it is impossible for comprehensively evaluating and comparing the adaptabilities of Stipa plants to CO_2 and climate change now. (2) Lack of study on the adaptation mechanism of Stipa plants to the synergistic effects of climatic factors: Current studies mostly concerned the impacts of single factor such as elevation of CO_2 concentration, warming and water stress on Stipa plants, but rarely concerned the synergistic effects of the environmental factors. The research of the synergistic effects of all the three environmental factors had not been reported so far. In fact,the three environmental factors simultaneously change and work on Stipa plants under global change,and there would be interactions among the factors on Stipa plants (enhancing or alleviating effects). Therefore,the adaptability of Stipa plants under global change could not be well understood if the effects of only one environmental factor on Stipa plants were concerned and studied. (3) Lack of study on the sensitivity of Stipa plants to CO_2 and climate change: many experiments did not have enough treatmental gradients in present researches. For instance, only one or two drought stress levels for precipitation change and only elevation of temperature or CO_2 concentration were usually designed in the simulative experiments. Many studies have shown that the effects of the environmental factors on Stipa plants presented the parabolic relationships but not linear relationships.
中文关键词	适应性 ; CO_2浓度升高 ; 温度升高 ; 降水变化 ; 针茅植物
英文关键词	adaptability elevated CO_2 warming precipitation change Stipa plants
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:5485866
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233180
作者单位	中国科学院植物研究所, 植被与环境变化国家重点实验室, 北京 100093, 中国
推荐引用方式 GB/T 7714	蒋延玲,周广胜,王玉辉,等. 内蒙古地带性针茅植物对CO_2和气候变化的适应性研究进展[J]. 中国科学院植物研究所,2015,35(14):4559-4569.
APA	蒋延玲,周广胜,王玉辉,王慧,&石耀辉.(2015).内蒙古地带性针茅植物对CO_2和气候变化的适应性研究进展.生态学报,35(14),4559-4569.
MLA	蒋延玲,et al."内蒙古地带性针茅植物对CO_2和气候变化的适应性研究进展".生态学报 35.14(2015):4559-4569.