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Multiple drivers of...
Multiple drivers of large-scale lichen decline in boreal forest canopies
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- Esseen, Per-Anders (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Umeå Univ, Dept Ecol & Environm Sci, SE-90187 Umeå, Sweden.
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- Ekström, Magnus, 1966- (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Statistik,Department of Forest Resource Management, Swedish University of Agricultural Sciences, Umeå, Sweden,Umeå Univ, Dept Stat, USBE, Umeå, Sweden.;Swedish Univ Agr Sci, Dept Forest Resource Management, Umeå, Sweden.,Institutionen för skoglig resurshushållning,Umeå University
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- Grafström, Anton (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management
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- Jonsson, Bengt-Gunnar, 1963- (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Mittuniversitetet,Institutionen för naturvetenskap,SLU,Institutionen för vilt, fisk och miljö,Department of Wildlife, Fish and Environmental Studies,Mid Sweden University
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- Palmqvist, Kristin (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Umeå Univ, Dept Ecol & Environm Sci, SE-90187 Umeå, Sweden.
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- Westerlund, Bertil (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management
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- Ståhl, Göran (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management
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(creator_code:org_t)
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- 2022-03-08
- 2022
- Engelska.
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Ingår i: Global Change Biology. - : John Wiley & Sons. - 1354-1013 .- 1365-2486. ; 28:10, s. 3293-3309
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Thin, hair-like lichens (Alectoria, Bryoria, Usnea) form conspicuous epiphyte communities across the boreal biome. These poikilohydric organisms provide important ecosystem functions and are useful indicators of global change. We analyse how environmental drivers influence changes in occurrence and length of these lichens on Norway spruce (Picea abies) over 10 years in managed forests in Sweden using data from >6000 trees. Alectoria and Usnea showed strong declines in southern-central regions, whereas Bryoria declined in northern regions. Overall, relative loss rates across the country ranged from 1.7% per year in Alectoria to 0.5% in Bryoria. These losses contrasted with increased length of Bryoria and Usnea in some regions. Occurrence trajectories (extinction, colonization, presence, absence) on remeasured trees correlated best with temperature, rain, nitrogen deposition, and stand age in multinomial logistic regression models. Our analysis strongly suggests that industrial forestry, in combination with nitrogen, is the main driver of lichen declines. Logging of forests with long continuity of tree cover, short rotation cycles, substrate limitation and low light in dense forests are harmful for lichens. Nitrogen deposition has decreased but is apparently still sufficiently high to prevent recovery. Warming correlated with occurrence trajectories of Alectoria and Bryoria, likely by altering hydration regimes and increasing respiration during autumn/winter. The large-scale lichen decline on an important host has cascading effects on biodiversity and function of boreal forest canopies. Forest management must apply a broad spectrum of methods, including uneven-aged continuous cover forestry and retention of large patches, to secure the ecosystem functions of these important canopy components under future climates. Our findings highlight interactions among drivers of lichen decline (forestry, nitrogen, climate), functional traits (dispersal, lichen colour, sensitivity to nitrogen, water storage), and population processes (extinction/colonization).
Ämnesord
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- climate change
- colonization
- epiphytic lichens
- extinction
- forestry
- long-term monitoring
- microclimate
- nitrogen deposition
- climate change
- klimatförändringar
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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