Replication Data for: Long-term homogenization of Fennoscandian heathland and tundra vegetation is connected to the expansion of an allelopathic dwarf shrub (doi:10.18710/VYQFPK)

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Replication Data for: Long-term homogenization of Fennoscandian heathland and tundra vegetation is connected to the expansion of an allelopathic dwarf shrub

doi:10.18710/VYQFPK

DataverseNO

2025-08-11

1

Maliniemi, Tuija; Kiilunen, Petteri; Bråthen, Kari Anne; Kapfer, Jutta; Bockelie Rosendal, Torunn; Grytnes, John-Arvid; Saccone, Patrick; Virtanen, Risto, 2025, "Replication Data for: Long-term homogenization of Fennoscandian heathland and tundra vegetation is connected to the expansion of an allelopathic dwarf shrub", https://doi.org/10.18710/VYQFPK, DataverseNO, V1

Replication Data for: Long-term homogenization of Fennoscandian heathland and tundra vegetation is connected to the expansion of an allelopathic dwarf shrub

doi:10.18710/VYQFPK

Maliniemi, Tuija (University of Oulu)

Kiilunen, Petteri (University of Oulu)

Bråthen, Kari Anne (UiT The Arctic University of Norway)

Kapfer, Jutta (Norwegian Institute of Bioeconomy Research)

Bockelie Rosendal, Torunn (UiT The Arctic University of Norway)

Grytnes, John-Arvid (Norwegian University of Life Sciences)

Saccone, Patrick (Institute of Botany of the Czech Academy of Sciences)

Virtanen, Risto (University of Oulu)

Tuija Maliniemi

Tuija Maliniemi

Petteri Kiilunen

Kari Anne Bråthen

Jutta Kapfer

Torunn Bockelie Rosendal

Risto Virtanen

University of Oulu

UiT The Arctic University of Norway

R statistical environment

259072

302749

Finnish Cultural Foundation

Profi6, 336449, Biodiverse Anthropocenes

University of Oulu

262693, 730938

DataverseNO

UiT The Arctic University of Norway

Maliniemi, Tuija

Bråthen, Kari Anne

Maliniemi, Tuija

2025-08-01

https://doi.org/10.18710/VYQFPK

Earth and Environmental Sciences, biodiversity change, vegetation resurvey, heathlands, tundra, Empetrum nigrum, crowberry, biotic homogenisation

This dataset contain plant community data (including vascular plants, bryophytes and lichens) from 275 vegetation plots from northern Fennoscandia (northern Finland and northern Norway). Values for each species are percentage cover estimates from 2 x 2 meter plot. Each plot has been surveyed twice, i.e., species have old and new percentage cover from 1964-75 and from 2013-23. We analyzed temporal changes in community composition and diversity across the study area and in different biogeographic zones, continentality-humidity classes and habitat types. We found a strong homogenization trend across the study area, with plant communities becoming more similar in composition over the decades when all taxa were treated together. The observed homogenization was driven especially by the increased similarity of vascular plant and lichen communities and was largely independent of biogeographic zones or continentality-humidity gradient. Homogenization was particularly associated with the drastic encroachment of the evergreen dwarf shrub Empetrum nigrum in habitat types originally dominated by other species, and with the decrease in lichen cover. In general, our findings suggest that Fennoscandian heathland and tundra vegetation is transforming towards a more homogeneous evergreen dwarf shrub-dominated system, which may threaten ecosystem multifunctionality. Our results highlight the importance of exploring biodiversity among different metrics and growth forms to understand the overall changes in heathland and tundra biodiversity.

1964-19752013-2023

Finland, Norway

• West Bounding Longitude: 17
• East Bounding Longitude: 31
• South Bounding Latitude: 66
• North Bounding Latitude: 71

survey data

Data from the original survey were extracted from Haapasaari, M. 1988. The oligotrophic heath vegetation of northern Fennoscandia and its zonation. - In: Acta Botanica Fennica 135. Finnish Botanical Publishing Board.

<a href="http://creativecommons.org/publicdomain/zero/1.0">CC0 1.0</a>

A third survey round and monitoring is ongoing for this dataset (not included in this dataset or in the related publication). Please contact Point of Contact (Tuija Maliniemi) for more information and/or data.

Maliniemi, T., Kiilunen, P., Bråthen, K.A., Kapfer, J., Bockelie Rosendal, T., Grytnes, J.-A., Saccone, P. & Virtanen, R. (2025). Long-term homogenization of Fennoscandian heathland and tundra vegetation is connected to the expansion of an allelopathic dwarf shrub. Ecography. https://doi.org/10.1002/ecog.07921

10.1002/ecog.07921

Maliniemi, T., Kiilunen, P., Bråthen, K.A., Kapfer, J., Bockelie Rosendal, T., Grytnes, J.-A., Saccone, P. & Virtanen, R. (2025). Long-term homogenization of Fennoscandian heathland and tundra vegetation is connected to the expansion of an allelopathic dwarf shrub. Ecography. https://doi.org/10.1002/ecog.07921

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Maliniemi_et_al_2025_Ecography_R_code.R

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