气候变化领域集成服务门户(CCPortal): Impact of plateau pika (Ochotona curzoniae) burrowing-induced microtopography on ecosystem respiration of the alpine meadow and steppe on the Tibetan plateau

CCPortal

DOI	10.1007/s11104-019-04122-w
	Impact of plateau pika (Ochotona curzoniae) burrowing-induced microtopography on ecosystem respiration of the alpine meadow and steppe on the Tibetan plateau
	Zhao, Jingxue; Tian, Lihua; Wei, Haixia; Zhang, Tao; Bai, Yanfu; Li, Ruicheng; Tang, Yanhong
通讯作者	Zhao, JX (通讯作者)
发表日期	2021
ISSN	0032-079X
EISSN	1573-5036
起始页码	217
结束页码	230
卷号	458 期号:1-2
英文摘要	Background Alpine ecosystem underlain by permafrost is considered as one of the most vulnerable ecosystems to disturbance, especially the alpine grassland on the Tibetan plateau with an altitude above 4000 m. Plateau pika (Ochotona curzoniae) burrowing can create distinctive bare grounds and cause micro-topographical heterogeneity in alpine grasslands. The burrowing-induced changes in microtopography may directly alter plant and soil interactions as well as ecosystem carbon cycle, which have rarely been studied in Tibetan alpine grasslands. Methods To test the responses of ecosystem respiration (Re) to pika burrowing-induced changes in microtopography, we investigated plant characteristics, soil properties and Re from the bare grounds and vegetated grounds in the alpine meadow and steppe on the Tibetan Plateau. Results Our study showed that vegetation cover, species richness, plant biomass, soil moisture (SM), soil organic carbon (SOC), total nitrogen (STN), soil microbial biomass carbon (MBC) and nitrogen (MBN) in the bare grounds were significantly lower than in the vegetated grounds in both alpine meadow and alpine steppe (P < 0.05). However, soil temperature and inorganic nitrogen tended to increase in the bare grounds. The growing season Re was significantly lower in the bare grounds than that in the vegetated grounds (P < 0.01). Pika burrowing had negative effects on Re and its temperature sensitivity in both alpine vegetations (P < 0.05). The relative changes in Re due to burrowing-induced changes in microtopography were positively correlated with the burrowing caused changes of AGB, BGB, SOC and MBC (P < 0.05). Pika burrowing-induced changes in soil temperature, soil moisture, plant biomass and microbial biomass are the major factors for the decrease of Re in the bare grounds. Conclusion In view of the large number of pika burrows in the alpine grasslands and the loss of soil organic carbon due to pika bioturbation, the impacts of pika burrowing-induced changes in microtopography on Re must be considered in predicting the carbon cycle in alpine grasslands.
关键词	LARGE ALTITUDINAL GRADIENT SOIL ORGANIC-CARBON QINGHAI-TIBET KEYSTONE RODENT CLIMATE-CHANGE CO2 EXCHANGE BIODIVERSITY TEMPERATURE DISTURBANCE BIOMASS
英文关键词	Tibetan plateau; Alpine grasslands; Ecosystem respiration; Small mammals; Microtopography
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000607876500017
来源期刊	PLANT AND SOIL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260343
推荐引用方式 GB/T 7714	Zhao, Jingxue,Tian, Lihua,Wei, Haixia,et al. Impact of plateau pika (Ochotona curzoniae) burrowing-induced microtopography on ecosystem respiration of the alpine meadow and steppe on the Tibetan plateau[J]. 中国科学院青藏高原研究所,2021,458(1-2).
APA	Zhao, Jingxue.,Tian, Lihua.,Wei, Haixia.,Zhang, Tao.,Bai, Yanfu.,...&Tang, Yanhong.(2021).Impact of plateau pika (Ochotona curzoniae) burrowing-induced microtopography on ecosystem respiration of the alpine meadow and steppe on the Tibetan plateau.PLANT AND SOIL,458(1-2).
MLA	Zhao, Jingxue,et al."Impact of plateau pika (Ochotona curzoniae) burrowing-induced microtopography on ecosystem respiration of the alpine meadow and steppe on the Tibetan plateau".PLANT AND SOIL 458.1-2(2021).