干旱区生态环境知识资源中心(Arid): A slight increase in soil pH benefits soil organic carbon and nitrogen storage in a semi-arid grassland

Arid

DOI	10.1016/j.ecolind.2021.108037
	A slight increase in soil pH benefits soil organic carbon and nitrogen storage in a semi-arid grassland
	Zhang, Jinwei; Wu, Xuefeng; Shi, Yujie; Jin, Chengji; Yang, Yuheng; Wei, Xiaowei; Mu, Chunsheng; Wang, Junfeng
通讯作者	Mu, CS ; Wang, JF (corresponding author), Northeast Normal Univ, Inst Grassland Sci, Jilin Songnen Grassland Ecosyst Natl Observat & R, Key Lab Vegetat Ecol,Minist Educ, Changchun 130024, Peoples R China.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2021
卷号	130
英文摘要	Grassland soil organic carbon and nitrogen storage (SOC storage and SNC storage) have been regarded as indicators to evaluate impacts of global climate change on ecosystem functions due to their significant impact on atmospheric carbon (C) concentration. The variations in vegetation and soil properties in diverse vegetation patch types may change soil C and nitrogen (N) sequestration capacity. However, the quantities of SOC and SNC stored and the mechanisms behind the variation in this storage under diverse vegetation patches in grassland ecosystems are still unclear. Here we conducted a field experiment to measure the variations in vegetation composition, soil properties and SOC storage and SNC storage among five common vegetation patch types in the Eastern Eurasian steppe. Then we investigated the link between vegetation variation and the SOC and SNC storage. The results showed that (1) the combined effects of competitive ability and physiological stress drove the unimodal relationship between species diversity and soil pH. (2) Biomass production did not reach its maximum in patch types with the greatest plant diversity due to saline-alkaline stress, but the live vegetation N storage reached its maximum in these highly diverse patches due to complementary resource utilization effects. (3) Although biomass production of patches with the greatest biodiversity did not reach a maximum due to a slight increase in soil pH, the largest SOC and SNC storage values were found in the highly diverse patches. Our study implies that in natural grassland, high levels of species diversity may accelerate the decomposition rate, resulting in more recalcitrant organic C and N are released into the soil. At the same time, our observation that reductions in the area of the originally dominant patch type due to the expansion of other species during grassland degradation suggests that comprehensive measurements of SOC and SNC storage in different vegetation patches should be undertaken for accurate evaluation of the C and N sequestering capacity of grasslands. Our results can also help policy makers determine how to achieve sustainable development of grasslands based on C and N sequestration.
英文关键词	Grassland degradation Biomass production Species diversity Soil organic carbon storage Soil nitrogen storage
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000692515900005
WOS关键词	PLANT-SPECIES RICHNESS ; LITTER DECOMPOSITION ; SONGNEN PLAIN ; DIVERSITY ; BIODIVERSITY ; EFFICIENCY ; STOCKS
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368254
作者单位	[Zhang, Jinwei; Wu, Xuefeng; Shi, Yujie; Yang, Yuheng; Wei, Xiaowei; Mu, Chunsheng; Wang, Junfeng] Northeast Normal Univ, Inst Grassland Sci, Jilin Songnen Grassland Ecosyst Natl Observat & R, Key Lab Vegetat Ecol,Minist Educ, Changchun 130024, Peoples R China; [Jin, Chengji] Grassland Management Stn Yanbian Korean Autonomou, Yanji 133001, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jinwei,Wu, Xuefeng,Shi, Yujie,et al. A slight increase in soil pH benefits soil organic carbon and nitrogen storage in a semi-arid grassland[J],2021,130.
APA	Zhang, Jinwei.,Wu, Xuefeng.,Shi, Yujie.,Jin, Chengji.,Yang, Yuheng.,...&Wang, Junfeng.(2021).A slight increase in soil pH benefits soil organic carbon and nitrogen storage in a semi-arid grassland.ECOLOGICAL INDICATORS,130.
MLA	Zhang, Jinwei,et al."A slight increase in soil pH benefits soil organic carbon and nitrogen storage in a semi-arid grassland".ECOLOGICAL INDICATORS 130(2021).