Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia
Permafrost exerts strong controls on forest development through nutrient availability. The key question of this study was to assess the effect of site conditions on macroelement concentration and stable isotope (δ13C and δ15N) dynamics during the growing season, and nutrient stoichiometry and resorp...
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ftmdpi:oai:mdpi.com:/1999-4907/9/6/314/ 2023-08-20T04:09:08+02:00 Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia Anatoly S. Prokushkin Frank Hagedorn Oleg S. Pokrovsky Jerome Viers Alexander V. Kirdyanov Oxana V. Masyagina Marina P. Prokushkina William H. McDowell agris 2018-06-01 application/pdf https://doi.org/10.3390/f9060314 EN eng Multidisciplinary Digital Publishing Institute Forest Ecophysiology and Biology https://dx.doi.org/10.3390/f9060314 https://creativecommons.org/licenses/by/4.0/ Forests; Volume 9; Issue 6; Pages: 314 permafrost Siberian Larix spp. foliar nutrients foliar δ 13 C and δ 15 N spatio-temporal variation stoichiometry nutrient resorption Text 2018 ftmdpi https://doi.org/10.3390/f9060314 2023-07-31T21:33:23Z Permafrost exerts strong controls on forest development through nutrient availability. The key question of this study was to assess the effect of site conditions on macroelement concentration and stable isotope (δ13C and δ15N) dynamics during the growing season, and nutrient stoichiometry and resorption efficiency in the foliage of two common larch species in Siberia. Foliar nutrient (N, P and K) concentrations of larches grown on permafrost soils were exceptionally high in juvenile needles compared to those from a permafrost-free region (+50% and 130% for P and K), but were two-fold lower at needle maturation. Within permafrost terrain trees, sites with a warmer and deeper soil active layer had 15–60% greater nutrient concentrations and higher δ15N in their needles compared to shallower, colder soils. Larch of permafrost-free sites demonstrated an enrichment of foliage in 15N (+1.4% to +2.4‰) in comparison to permafrost terrain (−2.0% to −6.9‰). At all sites, foliar δ13C decreased from June to August, which very likely results from an increasing contribution of current photoassimilates to build foliar biomass. With senescence, nutrient concentrations in larch needles decreased significantly by 60–90%. This strong ability of larch to retain nutrients through resorption is the essential mechanism that maintains tree growth early in the growing season when soil remains frozen. The high resorptive efficiency found for K and P for larches established on permafrost suggests nutrient limitation of tree growth within the Central Siberian Plateau not only by N, as previously reported, but also by P and K. The increasing nutrient concentrations and a 15N enrichment of foliage towards warmer sites was paralleled by an up to 50-fold increase in biomass production, strongly suggesting that accelerated nutrient cycling with permafrost degradation contributes to an increased productivity of Siberian larch forests. Text permafrost Siberia MDPI Open Access Publishing Forests 9 6 314 |
institution |
Open Polar |
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MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
permafrost Siberian Larix spp. foliar nutrients foliar δ 13 C and δ 15 N spatio-temporal variation stoichiometry nutrient resorption |
spellingShingle |
permafrost Siberian Larix spp. foliar nutrients foliar δ 13 C and δ 15 N spatio-temporal variation stoichiometry nutrient resorption Anatoly S. Prokushkin Frank Hagedorn Oleg S. Pokrovsky Jerome Viers Alexander V. Kirdyanov Oxana V. Masyagina Marina P. Prokushkina William H. McDowell Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia |
topic_facet |
permafrost Siberian Larix spp. foliar nutrients foliar δ 13 C and δ 15 N spatio-temporal variation stoichiometry nutrient resorption |
description |
Permafrost exerts strong controls on forest development through nutrient availability. The key question of this study was to assess the effect of site conditions on macroelement concentration and stable isotope (δ13C and δ15N) dynamics during the growing season, and nutrient stoichiometry and resorption efficiency in the foliage of two common larch species in Siberia. Foliar nutrient (N, P and K) concentrations of larches grown on permafrost soils were exceptionally high in juvenile needles compared to those from a permafrost-free region (+50% and 130% for P and K), but were two-fold lower at needle maturation. Within permafrost terrain trees, sites with a warmer and deeper soil active layer had 15–60% greater nutrient concentrations and higher δ15N in their needles compared to shallower, colder soils. Larch of permafrost-free sites demonstrated an enrichment of foliage in 15N (+1.4% to +2.4‰) in comparison to permafrost terrain (−2.0% to −6.9‰). At all sites, foliar δ13C decreased from June to August, which very likely results from an increasing contribution of current photoassimilates to build foliar biomass. With senescence, nutrient concentrations in larch needles decreased significantly by 60–90%. This strong ability of larch to retain nutrients through resorption is the essential mechanism that maintains tree growth early in the growing season when soil remains frozen. The high resorptive efficiency found for K and P for larches established on permafrost suggests nutrient limitation of tree growth within the Central Siberian Plateau not only by N, as previously reported, but also by P and K. The increasing nutrient concentrations and a 15N enrichment of foliage towards warmer sites was paralleled by an up to 50-fold increase in biomass production, strongly suggesting that accelerated nutrient cycling with permafrost degradation contributes to an increased productivity of Siberian larch forests. |
format |
Text |
author |
Anatoly S. Prokushkin Frank Hagedorn Oleg S. Pokrovsky Jerome Viers Alexander V. Kirdyanov Oxana V. Masyagina Marina P. Prokushkina William H. McDowell |
author_facet |
Anatoly S. Prokushkin Frank Hagedorn Oleg S. Pokrovsky Jerome Viers Alexander V. Kirdyanov Oxana V. Masyagina Marina P. Prokushkina William H. McDowell |
author_sort |
Anatoly S. Prokushkin |
title |
Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia |
title_short |
Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia |
title_full |
Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia |
title_fullStr |
Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia |
title_full_unstemmed |
Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia |
title_sort |
permafrost regime affects the nutritional status and productivity of larches in central siberia |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2018 |
url |
https://doi.org/10.3390/f9060314 |
op_coverage |
agris |
genre |
permafrost Siberia |
genre_facet |
permafrost Siberia |
op_source |
Forests; Volume 9; Issue 6; Pages: 314 |
op_relation |
Forest Ecophysiology and Biology https://dx.doi.org/10.3390/f9060314 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/f9060314 |
container_title |
Forests |
container_volume |
9 |
container_issue |
6 |
container_start_page |
314 |
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