气候变化领域集成服务门户(CCPortal): Plant-soil interactions alter nitrogen and phosphorus dynamics in an advancing subarctic treeline

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DOI	10.1111/gcb.17200
	Plant-soil interactions alter nitrogen and phosphorus dynamics in an advancing subarctic treeline
	Fetzer, Jasmin; Moiseev, Pavel; Frossard, Emmanuel; Kaiser, Klaus; Mayer, Mathias; Gavazov, Konstantin; Hagedorn, Frank
发表日期	2024
ISSN	1354-1013
EISSN	1365-2486
起始页码	30
结束页码	3
卷号	30 期号:3
英文摘要	Treelines advance due to climate warming. The impacts of this vegetation shift on plant-soil nutrient cycling are still uncertain, yet highly relevant as nutrient availability stimulates tree growth. Here, we investigated nitrogen (N) and phosphorus (P) in plant and soil pools along two tundra-forest transects on Kola Peninsula, Russia, with a documented elevation shift of birch-dominated treeline by 70 m during the last 50 years. Results show that although total N and P stocks in the soil-plant system did not change with elevation, their distribution was significantly altered. With the transition from high-elevation tundra to low-elevation forest, P stocks in stones decreased, possibly reflecting enhanced weathering. In contrast, N and P stocks in plant biomass approximately tripled and available P and N in the soil increased fivefold toward the forest. This was paralleled by decreasing carbon (C)-to-nutrient ratios in foliage and litter, smaller C:N:P ratios in microbial biomass, and lower enzymatic activities related to N and P acquisition in forest soils. An incubation experiment further demonstrated manifold higher N and P net mineralization rates in litter and soil in forest compared to tundra, likely due to smaller C:N:P ratios in decomposing organic matter. Overall, our results show that forest expansion increases the mobilization of available nutrients through enhanced weathering and positive plant-soil feedback, with nutrient-rich forest litter releasing greater amounts of N and P upon decomposition. While the low N and P availability in tundra may retard treeline advances, its improvement toward the forest likely promotes tree growth and forest development. Globally, treelines are shifting due to climate warming. We studied how this shift affects nitrogen and phosphorus in plants and soils along tundra-forest transects on Kola Peninsula, Russia. Despite stable total nitrogen and phosphorus stocks, their distribution among pools changed. From high elevation tundra to low elevation forest, phosphorus stocks in stones decreased signaling stronger weathering, while biomass nitrogen and phosphorus stocks tripled. Available soil phosphorus and nitrogen increased fivefold toward the forest due to greater nutrient release during decomposition of nutrient-rich forest litter. Forest expansion mobilized nutrients through enhanced weathering and positive plant-soil feedbacks, potentially promoting forest growth.image
英文关键词	biogeochemistry; climate change; elevation gradient; extracellular enzymatic activity; forest; microbial biomass; nutrient cycling; stoichiometry; tundra
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:001178705300001
来源期刊	GLOBAL CHANGE BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306090
作者单位	Swiss Federal Institutes of Technology Domain; Swiss Federal Institute for Forest, Snow & Landscape Research; Swiss Federal Institutes of Technology Domain; ETH Zurich; Martin Luther University Halle Wittenberg; BOKU University; Swiss Federal Institutes of Technology Domain; ETH Zurich
推荐引用方式 GB/T 7714	Fetzer, Jasmin,Moiseev, Pavel,Frossard, Emmanuel,et al. Plant-soil interactions alter nitrogen and phosphorus dynamics in an advancing subarctic treeline[J],2024,30(3).
APA	Fetzer, Jasmin.,Moiseev, Pavel.,Frossard, Emmanuel.,Kaiser, Klaus.,Mayer, Mathias.,...&Hagedorn, Frank.(2024).Plant-soil interactions alter nitrogen and phosphorus dynamics in an advancing subarctic treeline.GLOBAL CHANGE BIOLOGY,30(3).
MLA	Fetzer, Jasmin,et al."Plant-soil interactions alter nitrogen and phosphorus dynamics in an advancing subarctic treeline".GLOBAL CHANGE BIOLOGY 30.3(2024).