Cited by 26Soil Carbon and Nitrogen DynamicsEcology and Vegetation Dynamics StudiesMycorrhizal Fungi and Plant Interactions

Above‐ground and below‐ground responses to long‐term nutrient addition across a retrogressive chronosequence

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Wardle, David A., Jonsson, Micael, Mayor, Jordan R., Metcalfe, Daniel B.·2016·Journal of Ecology

Abstract

Summary: There is much interest in understanding ecosystem responses to local‐scale soil fertility variation, which has often been studied using retrogressive chronosequences that span thousands of years and show declining fertility and plant productivity over time. There have been few attempts to experimentally test how plant nutrient limitation changes during retrogression. We studied a well‐characterized system of 30 forested lake islands in northern Sweden that collectively represent a 5350‐year post‐fire retrogressive chronosequence, with fertility and productivity decreasing as time since fire increases. For each island, we set up four plots on understorey vegetation, each subjected to a different fertilizer treatment over 6 years: no additions, nitrogen (N) only, phosphorus (P) only and N + P. We found that both N and P additions reduced feather moss and thus total plant biomass. Meanwhile, the three dominant vascular plant species showed contrasting biomass responses, but similar responses of foliar nutrient concentrations to nutrient additions. Fertilization reduced most microbial groups and altered CO 2 fluxes, most likely through feather moss reduction. Against expectations, the majority of interactive effects of N and P were antagonistic. Changes in effects of nutrient additions during retrogression were usually modest. Empetrum hermaphroditum biomass was increasingly promoted by P and N + P addition, while vascular plant N‐to‐P ratios were increasingly reduced by P addition, indicating increasing plant limitation by nutrients (notably P) during retrogression. Below‐ground, positive effects of N addition on soil mineral N increased, while negative effects of N addition on soil fungi decreased during retrogression; no other below‐ground effects of fertilization changed along the gradient. Synthesis. Our results show that forest understorey communities on islands of different fire history and thus stages of retrogression show relatively modest differences in how they respond to nutrient addition despite large changes in ecosystem productivity and soil fertility, probably because of high species turnover and adaptation of communities to infertile conditions. While increased nutrient availability (as expected through global change) may have important ecological consequences, these effects are likely, especially below‐ground, to be rather similar across ecosystems that differ greatly in nutrient availability and productivity.

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Crossref · 10.1111/1365-2745.12520

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  • The effect of fire on soils is inherently coupled with changes aboveground.

    “The effect of fire on soils is inherently coupled with changes aboveground (Wardle, Jonsson, Mayor, & Metcalfe, 2016).”

    From Fire as a fundamental ecological process: Research advances and frontiers (2020) · cites this paper as Wardle et al., 2016

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Authors
Wardle, D. A., Jonsson, M., Mayor, J. R., & Metcalfe, D. B.
Affiliations
  • Swedish University of Agricultural Sciences (SE)
  • Umeå University (SE)
  • Lund University (SE)
Corresponding author
Wardle, David A.
Venue
Journal of Ecology
Publisher
Wiley
Published
2015-12-29
Volume
104
Issue
2
Pages
545-560
ISSN
  • 0022-0477 (ISSN-L)
  • 1365-2745
OpenAlex
W2175581191
Cited by
25
References
87
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 4 · 2021: 4 · 2020: 5 · 2019: 2 · 2018: 2 · 2017: 2
FWCI
1.83
Type
journal article
Language
en
Open access
Locations
  • Journal of Ecology (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
Wallenberg Scholars
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Ecology and Vegetation Dynamics Studies
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Mycorrhizal Fungi and Plant Interactions
Keywords
nutrient addition, nitrogen fertilization, phosphorus fertilization, post-fire succession, feather moss, Empetrum hermaphroditum, plant nutrient limitation, soil microbial communities, soil fungi, soil mineral nitrogen, soil CO2 flux, leaf nutrient content, plant biomass, lake islands, soil fertility

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