Next Article in Journal
Non-Structural Carbohydrate Dynamics in Leaves and Branches of Pinus massoniana (Lamb.) Following 3-Year Rainfall Exclusion
Next Article in Special Issue
Compound-Specific Carbon Isotopes and Concentrations of Carbohydrates and Organic Acids as Indicators of Tree Decline in Mountain Pine
Previous Article in Journal
Improved Estimates of Biomass Expansion Factors for Russian Forests
Previous Article in Special Issue
Spatial Variation in Leaf Stable Carbon Isotope Composition of Three Caragana Species in Northern China
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Forests 2018, 9(6), 314; https://doi.org/10.3390/f9060314

Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia

1
V.N. Sukachev Institute of Forest SB RAS, Akademgorodok 50/28, 660036 Krasnoyarsk, Russia
2
WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
3
GET, Université Paul Sabatier-CNRS-IRD, 14 Avenue Edouard Belin, 31400 Toulouse, France
4
Siberian Federal University, Svobodny 79, 660041 Krasnoyarsk, Russia
5
Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH 03824, USA
*
Author to whom correspondence should be addressed.
Received: 13 April 2018 / Revised: 31 May 2018 / Accepted: 31 May 2018 / Published: 1 June 2018
(This article belongs to the Special Issue Isotope Application in Forest Growth Assessment)
Full-Text   |   PDF [3349 KB, uploaded 1 June 2018]   |  

Abstract

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. View Full-Text
Keywords: permafrost; Siberian Larix spp.; foliar nutrients; foliar δ13C and δ15N; spatio-temporal variation; stoichiometry; nutrient resorption permafrost; Siberian Larix spp.; foliar nutrients; foliar δ13C and δ15N; spatio-temporal variation; stoichiometry; nutrient resorption
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Prokushkin, A.S.; Hagedorn, F.; Pokrovsky, O.S.; Viers, J.; Kirdyanov, A.V.; Masyagina, O.V.; Prokushkina, M.P.; McDowell, W.H. Permafrost Regime Affects the Nutritional Status and Productivity of Larches in Central Siberia. Forests 2018, 9, 314.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Forests EISSN 1999-4907 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top