A1 Journal article (refereed)
Wood-decaying fungi in old-growth boreal forest fragments : extinctions and colonizations over 20 years (2021)

Komonen, A., Puumala, I., Varkonýi, G., & Penttilä, R. (2021). Wood-decaying fungi in old-growth boreal forest fragments : extinctions and colonizations over 20 years. Silva Fennica, 55(1), Article 10491. https://doi.org/10.14214/sf.10491

JYU authors or editors

Publication details

All authors or editors: Komonen, Atte; Puumala, Ilkka; Varkonýi, Gergely; Penttilä, Reijo

Journal or series: Silva Fennica

ISSN: 0037-5330

eISSN: 2242-4075

Publication year: 2021

Volume: 55

Issue number: 1

Article number: 10491

Publisher: Suomen metsätieteellinen seura

Publication country: Finland

Publication language: English

DOI: https://doi.org/10.14214/sf.10491

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/73919

Abstract

According to ecology theory, isolated habitat fragments cannot maintain populations of specialized species. Yet, empirical evidence based on monitoring of the same fragments over time is still limited. We studied the colonization–extinction dynamics of eight wood-decaying fungal species in 16 old-growth forest fragments (<14 ha) over a 20-year period (1997–2017). We observed 19 extinctions and 5 colonizations; yet, the distribution of extinctions and colonizations did not differ from the one expected by chance for any of the species. Twenty-six percent of the extinctions took place in two natural fragments amid large forest–peatland complexes. Phellinus nigrolimitatus (Romell) Bourdot and Galzin decreased and Phellinus ferrugineofuscus (P. Karst.) Bourdot increased in abundance (number of logs occupied). The volume of living spruce trees in the forest fragments correlated positively with the number of logs inhabited in five of the study species. Because fragment characteristics did not affect species turnover, it seems that stochastic processes governed colonizations and extinctions. Although the least abundant species in 1997 had declined, and the most abundant species had become more abundant, it appears that specialized wood-decaying fungi can persist for decades in isolated old-growth forest fragments, if suitable dead wood is continuously available.

Keywords: wood-decaying fungi; Polyporaceae; spreading (process); disappearance; habitat; old growth forests; fragmentation; spruce; decayed wood

Free keywords: extinction debt; fragmentation; habitat loss; polypores; spruce forest

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 1