干旱区生态环境知识资源中心(Arid): 生物结皮-土壤呼吸对冬季低温及模拟增温的响应

Arid

	生物结皮-土壤呼吸对冬季低温及模拟增温的响应
其他题名	Response of biocrust-soil system respiration to winter low temperature and simulated warming
	管超; 张鹏; 陈永乐; 宋光; 周媛媛; 李新荣
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2016
卷号	27 期号:10 页码:3213-3220
中文摘要	以腾格里沙漠东南缘天然植被区藓类结皮和藻-地衣结皮-土壤为研究对象,利用开顶式生长室(OTC),采用Li-8150系统连续测定了冬季(2015年11月2016年1月)低温环境下两类结皮-土壤呼吸的变化,分析了低温及模拟增温对两类结皮-土壤呼吸的影响.结果表明:观测期内,藓类结皮、藻-地衣结皮-土壤呼吸速率分别为-0.052 ~ 0.418、-0.032 ~ 0.493mumol·m~(-2)·s~(-1),且藓类结皮显著高于藻-地衣结皮-土壤系统.不同类型结皮-土壤呼吸速率与5 cm土壤温度和土壤体积含水量均呈显著线性正相关,增温主要是通过加速土壤水分蒸散而抑制生物结皮-土壤呼吸速率.在整个观测期,藓类结皮-土壤系统累计排放9.90 g C·m~(-2),显著高于藻-地衣结皮-土壤系统的7.00 g C·m~(-2).研究区生物结皮-土壤系统冬季累计排放7.40 g C·m~(-2),是该荒漠生态系统全年碳收支的重要组成部分.
英文摘要	To study the effects of low temperature and simulated warming on respiration of biocrustsoil systems,intact soil columns covered by two dominant types of biocrusts(moss and algae-lichen crusts),were collected in a natural vegetation area in the southeast fringe of the Tengger Desert. Automated soil respiration system(Li-8150) was used to measure respiration rates in biocrust-soil systems under warming(by placing them in an open top chamber) and non-warming treatments in winter(from November 2015 to January 2016). During the whole observation period,soil respiration rates covered by moss crusts were significantly higher than those covered by algae-lichen crusts, which were -0.052 to 0.418 and -0.032 to 0.493mumol·m~(-2)·s~(-1),respectively. The respiration rates of the two types of biocrust-soil systems showed significant positive linear correlations with soil temperature and volumetric soil water content at 5 cm depth. Through speeding-up the evaporation rates of soil moisture,imitated warming in winter impeded respiration rates of the two biocrust-soil systems. During the whole observation period,the cumulative carbon(C) release by moss crust-soil system(9.90 g C·m~(-2)) was dramatically higher than that of algae-lichen crust-soil system(7.00 g C·m~(-2)). The cumulative C release by the biocrust-soil systems in this region in winter was 7.40 g C·m~(-2),thus comprising an important part of annual C budget in the desert ecosystems.
中文关键词	呼吸作用 ; 生物结皮 ; 低温 ; 模拟增温
英文关键词	respiration biocrusts low temperature simulated warming
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5823179
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235254
作者单位	中国科学院寒区旱区环境与工程研究所, 中国科学院沙坡头沙漠研究试验站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	管超,张鹏,陈永乐,等. 生物结皮-土壤呼吸对冬季低温及模拟增温的响应[J]. 中国科学院西北生态环境资源研究院,2016,27(10):3213-3220.
APA	管超,张鹏,陈永乐,宋光,周媛媛,&李新荣.(2016).生物结皮-土壤呼吸对冬季低温及模拟增温的响应.应用生态学报,27(10),3213-3220.
MLA	管超,et al."生物结皮-土壤呼吸对冬季低温及模拟增温的响应".应用生态学报 27.10(2016):3213-3220.