Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra

Abstract Phosphorus (P) limits or co‐limits plant and microbial life in multiple ecosystems, including the arctic tundra. Although current global carbon (C) models focus on the coupling between soil nitrogen (N) and C, ecosystem P response to climate warming may also influence the global C cycle. Pe...

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Autores principales:	Jennie R. McLaren, Kate M. Buckeridge
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	climate change experimental warming extracellular enzyme activity long‐term phosphorus toolik LTER Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/ba40805e1fea4b38af2b2393f901eeab
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spelling	oai:doaj.org-article:ba40805e1fea4b38af2b2393f901eeab2021-11-29T07:06:42ZEnhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra2150-892510.1002/ecs2.3838https://doaj.org/article/ba40805e1fea4b38af2b2393f901eeab2021-11-01T00:00:00Zhttps://doi.org/10.1002/ecs2.3838https://doaj.org/toc/2150-8925Abstract Phosphorus (P) limits or co‐limits plant and microbial life in multiple ecosystems, including the arctic tundra. Although current global carbon (C) models focus on the coupling between soil nitrogen (N) and C, ecosystem P response to climate warming may also influence the global C cycle. Permafrost soils may see enhanced or reduced P availability under climate warming through multiple mechanisms including changing litter inputs through plant community change, changing plant–microbial dynamics, altered rates of mineralization of soil organic P through increased microbial activity, and newly exposed mineral‐bound P via deeper thaw. We investigated the effect of long‐term warming on plant leaf, multiple soil and microbial C, N, and P pools, and microbial extracellular enzyme activities, in Alaskan tundra plots underlain by permafrost. Here, we show that 25 yr of experimental summer warming increases community‐level plant leaf P through changing community composition to favour relatively P‐rich plant species. However, despite associated increases in P‐rich litter inputs, we found only a few responses in the belowground pools of P available for plant and microbial uptake, including a weak positive response for citric acid–extractable PO4 in the surface soil, a decrease in microbial biomass P, and no change in soil P (or C or N) stocks. This weak, neutral, or negative belowground P response to warming despite enhanced litter P inputs is consistent with a growing number of studies in the arctic tundra that find no long‐term response of soil C and N stocks to warming.Jennie R. McLarenKate M. BuckeridgeWileyarticleclimate changeexperimental warmingextracellular enzyme activitylong‐termphosphorustoolik LTEREcologyQH540-549.5ENEcosphere, Vol 12, Iss 11, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	climate change experimental warming extracellular enzyme activity long‐term phosphorus toolik LTER Ecology QH540-549.5
spellingShingle	climate change experimental warming extracellular enzyme activity long‐term phosphorus toolik LTER Ecology QH540-549.5 Jennie R. McLaren Kate M. Buckeridge Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra
description	Abstract Phosphorus (P) limits or co‐limits plant and microbial life in multiple ecosystems, including the arctic tundra. Although current global carbon (C) models focus on the coupling between soil nitrogen (N) and C, ecosystem P response to climate warming may also influence the global C cycle. Permafrost soils may see enhanced or reduced P availability under climate warming through multiple mechanisms including changing litter inputs through plant community change, changing plant–microbial dynamics, altered rates of mineralization of soil organic P through increased microbial activity, and newly exposed mineral‐bound P via deeper thaw. We investigated the effect of long‐term warming on plant leaf, multiple soil and microbial C, N, and P pools, and microbial extracellular enzyme activities, in Alaskan tundra plots underlain by permafrost. Here, we show that 25 yr of experimental summer warming increases community‐level plant leaf P through changing community composition to favour relatively P‐rich plant species. However, despite associated increases in P‐rich litter inputs, we found only a few responses in the belowground pools of P available for plant and microbial uptake, including a weak positive response for citric acid–extractable PO4 in the surface soil, a decrease in microbial biomass P, and no change in soil P (or C or N) stocks. This weak, neutral, or negative belowground P response to warming despite enhanced litter P inputs is consistent with a growing number of studies in the arctic tundra that find no long‐term response of soil C and N stocks to warming.
format	article
author	Jennie R. McLaren Kate M. Buckeridge
author_facet	Jennie R. McLaren Kate M. Buckeridge
author_sort	Jennie R. McLaren
title	Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra
title_short	Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra
title_full	Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra
title_fullStr	Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra
title_full_unstemmed	Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra
title_sort	enhanced plant leaf p and unchanged soil p stocks after a quarter century of warming in the arctic tundra
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/ba40805e1fea4b38af2b2393f901eeab
work_keys_str_mv	AT jenniermclaren enhancedplantleafpandunchangedsoilpstocksafteraquartercenturyofwarminginthearctictundra AT katembuckeridge enhancedplantleafpandunchangedsoilpstocksafteraquartercenturyofwarminginthearctictundra
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Enhanced plant leaf P and unchanged soil P stocks after a quarter century of warming in the arctic tundra

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