气候变化领域集成服务门户(CCPortal): Evidence for phosphorus limitation in high-elevation unvegetated soils, Niwot Ridge, Colorado

CCPortal

DOI	10.1007/s10533-019-00624-y
	Evidence for phosphorus limitation in high-elevation unvegetated soils, Niwot Ridge, Colorado
	Bueno de Mesquita C.P.; Brigham L.M.; Sommers P.; Porazinska D.L.; Farrer E.C.; Darcy J.L.; Suding K.N.; Schmidt S.K.
发表日期	2020
ISSN	1682563
卷号	147 期号:1
英文摘要	A key challenge to understanding the effects of climate change and nutrient deposition on ecosystem functioning is our lack of knowledge about nutrient limitations of heterotrophic and phototrophic microbial communities. This is especially true in high elevation ecosystems where it has been shown that earlier melt-out of snow beds and glacial retreat is allowing photosynthetic microbes and plants to move into previously unvegetated areas. We used landscape-level analyses of microbial enzyme stoichiometries combined with soil microcosm fertilization studies to determine which nutrients are limiting to microbes in plant-free or sparsely vegetated, snow bed areas of the Colorado Front Range. Both of these independent approaches indicated that the ultimate limiting nutrient in unvegetated and sparsely vegetated soils is phosphorus (P) for phototrophic microbes, with co-limitation by carbon (C) for the entire microbial community. In contrast, vegetated soils in the same watersheds showed more balanced nitrogen (N), P and C co-limitation similar to patterns seen in other plant-dominated ecosystems. In microcosm experiments, P additions resulted in increased growth rates and percent cover by phototrophs, whereas N additions decreased the relative abundances of phototrophs. Taken together, our findings indicate that the colonization of high elevation ecosystems being impacted by N deposition and climate warming will likely be constrained by P limitation of both heterotrophic and phototrophic microbes and by negative impacts of N on microbial phototrophs. These effects may in turn limit the ability of these fragile ecosystems to immobilize inputs of atmospheric N causing increased runoff of excess N to downstream ecosystems. © 2019, Springer Nature Switzerland AG.
英文关键词	Cyanobacteria; Extreme environments; Glacial retreat; High-elevation soils; Microbial community assembly; Microbial succession; Phosphorus limitation
学科领域	climate change; colonization; cyanobacterium; elevation; enzyme; extremophile; glacier retreat; nitrogen; nutrient limitation; phosphorus; photoautotrophy; soil chemistry; Colorado; Front Range; Niwot Ridge; Rocky Mountains; Cyanobacteria
语种	英语
scopus关键词	climate change; colonization; cyanobacterium; elevation; enzyme; extremophile; glacier retreat; nitrogen; nutrient limitation; phosphorus; photoautotrophy; soil chemistry; Colorado; Front Range; Niwot Ridge; Rocky Mountains; Cyanobacteria
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120401
作者单位	Department of Ecology and Evolutionary Biology, University of Colorado, Campus Box 334, Boulder, CO 80309-0334, United States; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309-0450, United States; Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, United States; Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA 70118, United States; Division of Biomedical Informatics and Personalized Medicine, School of Medicine, University of Colorado Denver Anschutz Medical Campus, Aurora, CO 80045, United States
推荐引用方式 GB/T 7714	Bueno de Mesquita C.P.,Brigham L.M.,Sommers P.,et al. Evidence for phosphorus limitation in high-elevation unvegetated soils, Niwot Ridge, Colorado[J],2020,147(1).
APA	Bueno de Mesquita C.P..,Brigham L.M..,Sommers P..,Porazinska D.L..,Farrer E.C..,...&Schmidt S.K..(2020).Evidence for phosphorus limitation in high-elevation unvegetated soils, Niwot Ridge, Colorado.Biogeochemistry,147(1).
MLA	Bueno de Mesquita C.P.,et al."Evidence for phosphorus limitation in high-elevation unvegetated soils, Niwot Ridge, Colorado".Biogeochemistry 147.1(2020).