气候变化领域集成服务门户(CCPortal): Community response of microbial primary producers to salinity is primarily driven by nutrients in lakes

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DOI	10.1016/j.scitotenv.2019.134001
	Community response of microbial primary producers to salinity is primarily driven by nutrients in lakes
	Yue, Linyan; Kong, Weidong; Ji, Mukan; Liu, Jinbo; Morgan-Kiss, Rachael M.
通讯作者	Kong, WD (通讯作者)
发表日期	2019
ISSN	0048-9697
EISSN	1879-1026
卷号	696
英文摘要	Higher microbial diversity was frequently observed in saline than fresh waters, but the underlying mechanisms remains unknown, particularly in microbial primary producers (MPP). MPP abundance and activity are notably constrained by high salinity, but facilitated by high nutrients. It remains to be ascertained whether and how nutrients regulate the salinity constraints on MPP abundance and community structure. Here we investigated the impact of nutrients on salinity constraints on MPP abundance and diversity in undisturbed lakes with a wide salinity range on the Tibetan Plateau. MPP community was explored using quantitative PCR, terminal restriction fragment length polymorphism and sequencing of cloning libraries targeting form IC cbbL gene. The MPP community structure was sorted by salinity into freshwater (salinity<1 parts per thousand), saline (1 parts per thousand < salinity<29 parts per thousand) and hypersaline (salinity>29 parts per thousand) lakes. Furthermore, while MPP abundance, diversity and richness were significantly constrained with increasing salinity, these constraints were mitigated by enhancing total organic carbon (TOC) and total nitrogen (TN) contents in freshwater and saline lakes. In contrast, the MPP diversity increased significantly with the salinity in hypersaline lakes, due to the mitigation of enhancing TOC and TN contents and salt-tolerant MPP taxa. The mitigating effect of nutrients was more pronounced in saline than in freshwater and hypersaline lakes. The MPP compositions varied along salinity, with Betaproteobacteria dominating both the freshwater and saline lakes and Gammaproteobacteria dominating the hypersaline lakes. We concluded that high nutrients could mitigate the salinity constraining effects on MPP abundance, community richness and diversity. Our findings offer a novel insight into the salinity effects on primary producers and highlight the interactive effects of salinity and nutrients on MPP in lakes. These findings can be used as a baseline to illuminate the effects of increased anthropogenic activities altering nutrient dynamics on the global hydrological cycle and the subsequent responses thereof by MPP communities. (C) 2019 Elsevier B.V. All rights reserved.
关键词	SUBUNIT GENES CBBL CLIMATE-CHANGE TIBETAN PLATEAU CARBON-FIXATION BACTERIAL COMMUNITIES NITROGEN DEPOSITION ANTARCTIC LAKES ORGANIC-CARBON FRESH-WATER SALT-LAKE
英文关键词	cbbL; Lake waters; Microbial primary producers; Nutrient; Salinity
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000498798600031
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/259534
推荐引用方式 GB/T 7714	Yue, Linyan,Kong, Weidong,Ji, Mukan,et al. Community response of microbial primary producers to salinity is primarily driven by nutrients in lakes[J]. 中国科学院青藏高原研究所,2019,696.
APA	Yue, Linyan,Kong, Weidong,Ji, Mukan,Liu, Jinbo,&Morgan-Kiss, Rachael M..(2019).Community response of microbial primary producers to salinity is primarily driven by nutrients in lakes.SCIENCE OF THE TOTAL ENVIRONMENT,696.
MLA	Yue, Linyan,et al."Community response of microbial primary producers to salinity is primarily driven by nutrients in lakes".SCIENCE OF THE TOTAL ENVIRONMENT 696(2019).