Elsevier

Pedosphere

Volume 30, Issue 3, June 2020, Pages 378-389
Pedosphere

Downed logs improve soil properties in old-growth temperate forests of northern Iran

https://doi.org/10.1016/S1002-0160(17)60424-7Get rights and content

Abstract

Dead trees, particularly downed logs, play an important role in the dynamics of forest ecosystem. Contribution of decaying wood to C and nutrient pools of forest soils depends on the tree species and degree of wood decay. However, the extent to which the downed logs affect the soil properties of temperate forests has rarely been evaluated. In this study, a mixed beech forest was selected in Liresar region of Mazandaran Province, northern Iran, to investigate if and how the presence of downed logs affected soil quality and function by comparing soils underneath degraded logs and nearby soils of the two dominant tree species (beech and hornbeam). We then explored how these effects occurred as downed logs decomposed by comparing the woods of both tree species at four degrees of decomposition. Degree of decay of downed logs was classified into four classes (DC1–DC4). Eight dead trees of each tree species were selected at the center of each sample plot. Three composite soil samples underneath each decaying log and 100 cm away from a decaying log were collected at two soil depths (0–15 and 15–30 cm) to analyze soil main physicochemical properties and microbial activity. The results revealed that downed logs affected soil physical (5% wetter than control soils), chemical (2% lower pH, 100% increase in organic C and total N in the case of hornbeam, and 2% increase in P), and biological characteristics (soil microbial respiration enhanced by 10%, and microbial biomass C 620 and 351.5 mg kg−1 and microbial biomass N 66.47 and 32.18 mg kg−1, respectively, in the cases of beech and hornbeam), thus resulting in significantly different soil microsites from those without downed logs. Presence of downed logs increased soil microbial activity and soil fertility as wood decayed. Thus, the presence of downed logs is an important factor influencing forest soils and should be taken into consideration in forest management practices.

References (75)

  • M E Harmon et al.

    Ecology of coarse woody debris in temperate ecosystems

    Adv Ecol Res

    (1986)
  • T W Idol et al.

    Characterization of coarse woody debris across a 100 year chronosequence of upland oak-hickory forests

    For Ecol Manage

    (2001)
  • Y Kooch et al.

    Effects of pits and mounds following windthrow events on soil features and greenhouse gas fluxes in a temperate forest

    Pedosphere

    (2015)
  • J Lagerlöf et al.

    Land-use intensification and agroforestry in the Kenyan highland: Impacts on soil microbial community composition and functional capacity

    Appl Soil Ecol

    (2014)
  • A Lassauce et al.

    Deadwood as a surrogate for forest biodiversity: Meta-analysis of correlations between deadwood volume and species richness of saproxylic organisms

    Ecol Indic

    (2011)
  • M C Moscatelli et al.

    Microbial indicators related to soil carbon in Mediterranean land use systems

    Soil Till Res

    (2007)
  • R Motta et al.

    Coarse woody debris, forest structure and regeneration in the Valbona Forest Reserve, Paneveggio, Italian Alps

    For Ecol Manage

    (2006)
  • A Muscolo et al.

    Influence of gap size on organic matter decomposition, microbial biomass and nutrient cycle in Calabrian pine (Pinus laricio, Poiret) stands

    For Ecol Manage

    (2007)
  • B Nordén et al.

    Relative importance of coarse and fine woody debris for the diversity of wood-inhabiting fungi in temperate broadleaf forests

    Biol Conserv

    (2004)
  • B Oberle et al.

    Progressive, idiosyncratic changes in wood hardness during decay: Implications for dead wood inventory and cycling

    For Ecol Manage

    (2014)
  • H Pabst et al.

    Effect of land-use and elevation on microbial biomass and water extractable carbon in soils of Mt. Kilimanjaro ecosystems

    Appl Soil Ecol

    (2013)
  • J A Parrotta

    Productivity, nutrient cycling, and succession in single- and mixed-species plantations of Casuarina equisetifolia, Eucalyptus robusta, and Leucaena leucocephala in Puerto Rico

    For Ecol Manage

    (1999)
  • J D Phillips et al.

    Pedological memory in forest soil development

    For Ecol Manage

    (2004)
  • S H Schoenholtz et al.

    A review of chemical and physical properties as indicators of forest soil quality: Challenges and opportunities

    For Ecol Manage

    (2000)
  • C J E Schulp et al.

    Effect of tree species on carbon stocks in forest floor and mineral soil and implications for soil carbon inventories

    For Ecol Manage

    (2008)
  • K Singh et al.

    Changes in physico-chemical, microbial and enzymatic activities during restoration of degraded sodic land: Ecological suitability of mixed forest over monoculture plantation

    Catena

    (2012)
  • G P Sparling et al.

    Estimation of soil microbial C by a fumigation-extraction method: Use on soils of high organic matter content, and a reassessment of the kec-factor

    Soil Biol Biochem

    (1990)
  • T Vrška et al.

    Deadwood residence time in alluvial hardwood temperate forests—a key aspect of biodiversity conservation

    For Ecol Manage

    (2015)
  • H Wang et al.

    Effects of tree species mixture on soil organic carbon stocks and greenhouse gas fluxes in subtropical plantations in China

    For Ecol Manage

    (2013)
  • Q K Wang et al.

    Soil organic matter under different forest types in Southern China

    Geoderma

    (2007)
  • K Alef

    Estimating of soil respiration

  • L E Allison

    Organic carbon

  • S W Beatty

    Influence of microtopography and canopy species on spatial patterns of forest understory plants

    Ecology

    (1984)
  • C A Bower et al.

    Exchangeable cation analysis of saline and alkali soils

    Soil Sci

    (1952)
  • S Brais et al.

    Interactions between deadwood and soil characteristics in a natural boreal trembling aspen-jack pine stand

    Can J For Res

    (2012)
  • J M Bremner et al.

    Nitrogen-total

  • A Brunner et al.

    Nitrogen fixation in coarse woody debris of Thuja plicata and Tsuga heterophylla forests on northern Vancouver Island

    Can J For Res

    (2003)
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