Response of habitat quality to mixed severity disturbance regime in Norway spruce forests

Bače, Radek (author), Hofmeister, Jeňýk (author), Vítková, Lucie (author), Brabec, Marek (author), Begovič, Krešimir (author), Čada, Vojtěch (author), Janda, Pavel (author), Kozák, Daniel (author), Mikoláš, Martin (author), Nagel, Thomas Andrew (author), Pavlin, Jakob (author), Rodrigo, Ruffy (author), Vostarek, Ondřej (author), Svoboda, Miroslav (author)

Natural disturbances change forest habitat quality for many species. As the extent and intensity of natural disturbances may increase under climate change, it is unclear how this increase can affect habitat quality on different spatial scales. To support management tools and policies aiming to prevent habitat loss, we studied how habitat quality develops in the long run depending on the disturbance severity using a space-for-time substitution approach. We explored the effects of time since disturbance (0 - 250 years) and disturbance severity (20 – 100 % canopy removal) on structure-based habitat quality indicators in European primary Norway spruce (Picea abies) forests using 1000 m2 circular plots in hierarchical design (a total of 407 plots in 35 stands). Disturbance history was reconstructed from tree cores. Habitat quality indicators were modelled as a function of the severity of the most severe disturbance and the time since this disturbance. We hypothesised that high within-stand habitat heterogeneity is formed by different successional stages after disturbances of various intensities. The results showed the U-shaped response of habitat quality to post-disturbance habitat succession on the plot scale. The decline deepened with disturbance severity. The U-shape response occurred in: large tree occurrence, amount of standing and lying deadwood, diversity of understory, and understory openness. The spatial diversity in disturbance parameters increased spatial diversity of habitat quality on a stand level as expected. This high within-stand habitat heterogeneity also decreased with increasing age of the most recent disturbance. This suggests that the absence of young successional stages results in the absence of some important elements for biodiversity, e.g. sun-exposed snags. Synthesis and applications. Our results demonstrate that currently intensifying natural disturbance regime can consequently result in a lower habitat heterogeneity. In managed spruce forests after natural disturbances we recommend at least the partial retention of biological legacies to preserve habitat heterogeneity and to avoid uniform and dense plantations resulting in a greater homogenisation. To emulate the natural disturbances pattern, spruce forests should be managed with a wide range of harvested patches of the size limited by a local natural disturbance regime creating spatial heterogeneity.

• Language: English
• Keywords: disturbance regime, forest structure, habitat quality, Picea abies (L.) Karst, spatial heterogeneity, biodiversity, canopy openness, forest ecology
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Publication date: 01.01.2023
• Year: 2023
• Number of pages: Str. 1352-1363
• Numbering: Vol. 60, iss. 7
• PID: 20.500.12556/RUL-150472
• UDC: 630*22
• ISSN on article: 1365-2664
• DOI: 10.1111/1365-2664.14409
• COBISS.SI-ID: 147919875
• Publication date in RUL: 18.09.2023

Record is a part of a journal

• Title: Journal of applied ecology
• Shortened title: J. appl. ecol.
• Publisher: Blackwell Science.
• ISSN: 1365-2664
• COBISS.SI-ID: 517750553

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: zgradba sestojev, gozdni habitat, kvaliteta habitata, navadna smreka, prostorska heterogenost, biotska raznovrstnost, odprtost krošnje, gozdna ekologija