气候变化领域集成服务门户(CCPortal): Reduced plant species diversity and soil carbon and nitrogen contents driven by vegetation patchiness in alpine meadows

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DOI	10.1111/jvs.13238
	Reduced plant species diversity and soil carbon and nitrogen contents driven by vegetation patchiness in alpine meadows
	Xi, Shougang; Hu, Tinghua; Mou, Xiaoming; Kou, Xiaoxue; Wang, Xianzhi; Yu, Yingwen
发表日期	2024
ISSN	1100-9233
EISSN	1654-1103
起始页码	35
结束页码	1
卷号	35 期号:1
英文摘要	QuestionPatchiness of herbaceous species is a common feature of degraded alpine grasslands on the Qinghai-Tibet Plateau; however, the impact of this phenomenon on vegetation, soil seed bank (SSB), and soil carbon (C) and nitrogen (N) is largely unknown. We asked how different herbaceous patches affect above-ground vegetation, the SSB and soil organic C (SOC) and total N (TN) contents in alpine meadows.LocationAn alpine meadow on the Qinghai-Tibetan Plateau, China.MethodsWe used field and greenhouse experiments to evaluate above-ground vegetation parameters, the SSB composition, and SOC and TN contents of four commonly distributed herbaceous patches (Leymus secalinus, Kobresia humilis, Leontopodium nanum and Pedicularis kansuensis) and non-patch vegetation (control).ResultsThere were significant differences in the species composition of above-ground vegetation, with the plant species richness, Shannon-Wiener index, Simpson index, and Pielou evenness index reduced in the four patches compared to the control. In addition, patches had increased above-ground biomass (AGB) and a lower below-ground biomass to above-ground biomass ratio (BGB:AGB); while the species diversity indices did not change considerably among the patches. The species composition of the SSB in the four patches differed from that in the control and the seed density increased markedly, but the species richness and diversity of the SSB remained unaltered. Moreover, the contents of SOC, total C, TN, microbial biomass C, and microbial biomass N in the four patches were markedly lower than in the control.ConclusionsThese findings suggest that patchiness of herbaceous species can alter the flora composition of alpine meadows and reduce plant species diversity, as well as the SOC and TN contents, which will adversely impact grassland biodiversity conservation and soil C sequestration, and then may intensify the degradation of alpine meadows on the Qinghai-Tibet Plateau. This study investigated the effects of patchiness of herbaceous species on above-ground vegetation, soil seed bank, soil organic carbon and total nitrogen contents in alpine meadows on the Qinghai-Tibetan Plateau. Our results showed that herbaceous patches reduced plant species diversity of above-ground vegetation and soil carbon and nitrogen contents in alpine meadows.image
英文关键词	alpine meadow; soil carbon; soil nitrogen; soil seed bank; species diversity; vegetation patch
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS记录号	WOS:001174368000001
来源期刊	JOURNAL OF VEGETATION SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/291429
作者单位	Lanzhou University; Chinese Academy of Sciences; Lanzhou University
推荐引用方式 GB/T 7714	Xi, Shougang,Hu, Tinghua,Mou, Xiaoming,et al. Reduced plant species diversity and soil carbon and nitrogen contents driven by vegetation patchiness in alpine meadows[J],2024,35(1).
APA	Xi, Shougang,Hu, Tinghua,Mou, Xiaoming,Kou, Xiaoxue,Wang, Xianzhi,&Yu, Yingwen.(2024).Reduced plant species diversity and soil carbon and nitrogen contents driven by vegetation patchiness in alpine meadows.JOURNAL OF VEGETATION SCIENCE,35(1).
MLA	Xi, Shougang,et al."Reduced plant species diversity and soil carbon and nitrogen contents driven by vegetation patchiness in alpine meadows".JOURNAL OF VEGETATION SCIENCE 35.1(2024).