Imprints of management history on hemiboreal forest ecosystems in the Baltic States

Kalev Jõgiste, Lee E Frelich, Diana Laarmann, Floortje Vodde, Endijs Baders, Janis Donis, Aris Jansons, Ahto Kangur, Henn Korjus, Kajar Köster, Jürgen Kusmin, Timo Kuuluvainen, Vitas Marozas, Marek Metslaid, Sandra Metslaid, Olga Polyachenko, Anneli Poska, Sille Rebane, John A. Stanturf

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In the Baltic States region, anthropogenic disturbances at different temporal and spatial scales mostly determine dynamics and development phases of forest ecosystems. We reviewed the state and condition of hemiboreal forests of the Baltic States region and analyzed species composition of recently established and permanent forest (PF). Agricultural deforestation and spontaneous or artificial conversion back to forest is a scenario leading to ecosystems designated as recent forest (RF, age up to two hundred years). Permanent forest (PF) was defined as areas with no records of agricultural activity during the last 200 yr, including mostly forests managed by traditional even-aged (clear-cut) silviculture and salvage after natural disturbances. We hypothesized that RF would have distinctive composition, with higher dominance by hardwoods (e.g., aspen and birch), compared to PF. Ordination revealed divergence in the RF stands; about half had the hypothesized composition distinct from PF, with a tight cluster of stands in the part of the ordination space with high hardwood dominance, while the remaining RF stands were scattered throughout the ordination space occupied by PF with highly variable species composition. Planting of conifers, variability in site quality, and variability in spatial proximity to PF with relatively natural ecosystem legacies likely explained the variable compositions of this latter group of RF. We positioned the observations of RF in a classic quantification of site type conditions (based on Estonian forest vegetation survey previously carried out by Lõhmus), which indicated that RF was more likely to occur on areas of higher soil fertility (in ordination space). Climatic and anthropogenic changes to RF create complex dynamic trends that are difficult to project into the future. Further research in tracing land use changes (using pollen analysis and documented evidence) should be utilized to refine the conceptual framework of ecosystem legacy and memory. Occurrence and frequency of deforestation and its characteristics as a novel disturbance regime are of particular interest.

Original languageEnglish (US)
Article numbere02503
JournalEcosphere
Volume9
Issue number11
DOIs
StatePublished - Nov 2018

Bibliographical note

Funding Information:
We are most grateful to Barbara Scott Murdock and Gordon Murdock for comments on an early version of the manuscript. Comments by Rupert Seidl have substantially contributed to the development of ideas presented here. Piret Trei did a substantial part of the editing. Mait Lang gave help with the forest map and Tiit Hang advised on the figure representing the geological profile. The manuscript benefitted significantly from the profound comments of two anonymous reviewers. This study was supported by a grant from the Estonian Environmental Investment Centre and by the Estonian Ministry of Education and Research grants (SF0170014s08, institutional research funding IUT21-4 and IUT1-8), by the Estonian Research Council grant PUT (PUT715), and by the projects of the Estonian University of Life Sciences P180024MIME and P170022MIMB. Considerable amount of work was done in the frame of the FORDISMAN network, the activity of which was financed by SNS-EFINORD. The grant to Kalev Jõgiste from Metsämiesten Säätiö is acknowledged.

Funding Information:
We are most grateful to Barbara Scott Murdock and Gordon Murdock for comments on an early version of the manuscript. Comments by Rupert Seidl have substantially contributed to the development of ideas presented here. Piret Trei did a substantial part of the editing. Mait Lang gave help with the forest map and Tiit Hang advised on the figure representing the geological profile. The manuscript benefitted significantly from the profound comments of two anonymous reviewers. This study was supported by a grant from the Estonian Environmental Investment Centre and by the Estonian Ministry of Education and Research grants (SF0170014s08, institutional research funding IUT21-4 and IUT1-8), by the Estonian Research Council grant PUT (PUT715), and by the projects of the Estonian University of Life Sciences P180024MIME and P170022MIMB. Considerable amount of work was done in the frame of the FORDISMAN network, the activity of which was financed by SNS-EFINORD. The grant to Kalev Jõgiste from Metsamiesten Saatio€ is acknowledged.

Publisher Copyright:
© 2018 The Authors.

Keywords

  • disturbances
  • ecosystem legacy
  • hemiboreal forest zone
  • land use change
  • managed forest
  • manipulated legacy

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