Lichen communities on Populus tremula are affected by the density of Picea abies
Questions: Aspen (Populus tremula) is declining in the old-growth forests of boreal Fennoscandia. This threatens the numerous taxa that are dependent on old aspens, including many epiphytic lichens. Potential methods to aid epiphytic lichens on aspen are centered around treatments which affect the d...
Published in: | Applied Vegetation Science |
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Language: | English |
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Wiley
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Online Access: | http://hdl.handle.net/10138/332664 https://doi.org/10.1111/avsc.12584 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/332664 2023-08-20T04:06:26+02:00 Lichen communities on Populus tremula are affected by the density of Picea abies Nirhamo, Aleksi Pykälä, Juha Halme, Panu Komonen, Atte 2021-07-29T09:20:18Z application/pdf http://hdl.handle.net/10138/332664 https://doi.org/10.1111/avsc.12584 eng eng Wiley Applied Vegetation Science 24: 2 1402-2001 Nirhamo, A, Pykälä, J, Halme, P, Komonen, A. Lichen communities on Populus tremula are affected by the density of Picea abies. Appl Veg Sci. 2021; 24:e12584. https://doi.org/10.1111/avsc.12584 https://doi.org/10.1111/avsc.12584 Suomen ympäristökeskus http://hdl.handle.net/10138/332664 CC BY 4.0 openAccess biodiversity boreal forests community ecology cyanolichens epiphytic lichens European aspen Norway spruce old-growth forests protected areas red-listed species succession lichen lichen communities Populus tremula density Picea abies boreal zone occurence Southern Finland Finland old growth forests interaction ecology mycology boreaalinen vyöhyke esiintyminen Etelä-Suomi suojelualueet jäkälät vanhat metsät metsäkuusi haapa tiheys vuorovaikutus ekologia sienitiede biodiversiteetti Article 2021 ftunivhelsihelda https://doi.org/10.1111/avsc.12584 2023-07-28T06:26:11Z Questions: Aspen (Populus tremula) is declining in the old-growth forests of boreal Fennoscandia. This threatens the numerous taxa that are dependent on old aspens, including many epiphytic lichens. Potential methods to aid epiphytic lichens on aspen are centered around treatments which affect the density of Norway spruce (Picea abies). In this study, we investigated how epiphytic lichen communities on aspen are affected by the variation of spruce density in the immediate vicinity of the focal aspen. Location: Southern boreal forests in Finland. Methods: We recorded the occurrence of lichens from 120 aspens in 12 semi-natural forest sites. We used spruce basal area as the measure for spruce density. The selected aspens represented a gradient in spruce basal area in the vicinity of the aspen from 0 to 36 m2/ha. We also measured other tree- and stand-level variables that are known to influence lichen occurrence. Results: Lichen communities on aspen were affected by spruce density, stand age and bark pH. Both lichen species richness and the richness of red-listed species were highest at an intermediate spruce density, and both increased with stand age. Lichen species richness was higher when bark pH was lower. Additionally, community composition was influenced the most by spruce density, followed by bark pH. Conclusions: Our study highlights the detrimental effects of high spruce density on lichen diversity on aspens. This is caused by high spruce density resulting in low light availability. Lichen diversity on aspens was highest when spruce density was intermediate. Spruce thinning in aspen-rich old-growth forests can be helpful in ensuring the long-term persistence of old-growth lichens on aspen in protected forests. Article in Journal/Newspaper Fennoscandia Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Norway Applied Vegetation Science 24 2 |
institution |
Open Polar |
collection |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
biodiversity boreal forests community ecology cyanolichens epiphytic lichens European aspen Norway spruce old-growth forests protected areas red-listed species succession lichen lichen communities Populus tremula density Picea abies boreal zone occurence Southern Finland Finland old growth forests interaction ecology mycology boreaalinen vyöhyke esiintyminen Etelä-Suomi suojelualueet jäkälät vanhat metsät metsäkuusi haapa tiheys vuorovaikutus ekologia sienitiede biodiversiteetti |
spellingShingle |
biodiversity boreal forests community ecology cyanolichens epiphytic lichens European aspen Norway spruce old-growth forests protected areas red-listed species succession lichen lichen communities Populus tremula density Picea abies boreal zone occurence Southern Finland Finland old growth forests interaction ecology mycology boreaalinen vyöhyke esiintyminen Etelä-Suomi suojelualueet jäkälät vanhat metsät metsäkuusi haapa tiheys vuorovaikutus ekologia sienitiede biodiversiteetti Nirhamo, Aleksi Pykälä, Juha Halme, Panu Komonen, Atte Lichen communities on Populus tremula are affected by the density of Picea abies |
topic_facet |
biodiversity boreal forests community ecology cyanolichens epiphytic lichens European aspen Norway spruce old-growth forests protected areas red-listed species succession lichen lichen communities Populus tremula density Picea abies boreal zone occurence Southern Finland Finland old growth forests interaction ecology mycology boreaalinen vyöhyke esiintyminen Etelä-Suomi suojelualueet jäkälät vanhat metsät metsäkuusi haapa tiheys vuorovaikutus ekologia sienitiede biodiversiteetti |
description |
Questions: Aspen (Populus tremula) is declining in the old-growth forests of boreal Fennoscandia. This threatens the numerous taxa that are dependent on old aspens, including many epiphytic lichens. Potential methods to aid epiphytic lichens on aspen are centered around treatments which affect the density of Norway spruce (Picea abies). In this study, we investigated how epiphytic lichen communities on aspen are affected by the variation of spruce density in the immediate vicinity of the focal aspen. Location: Southern boreal forests in Finland. Methods: We recorded the occurrence of lichens from 120 aspens in 12 semi-natural forest sites. We used spruce basal area as the measure for spruce density. The selected aspens represented a gradient in spruce basal area in the vicinity of the aspen from 0 to 36 m2/ha. We also measured other tree- and stand-level variables that are known to influence lichen occurrence. Results: Lichen communities on aspen were affected by spruce density, stand age and bark pH. Both lichen species richness and the richness of red-listed species were highest at an intermediate spruce density, and both increased with stand age. Lichen species richness was higher when bark pH was lower. Additionally, community composition was influenced the most by spruce density, followed by bark pH. Conclusions: Our study highlights the detrimental effects of high spruce density on lichen diversity on aspens. This is caused by high spruce density resulting in low light availability. Lichen diversity on aspens was highest when spruce density was intermediate. Spruce thinning in aspen-rich old-growth forests can be helpful in ensuring the long-term persistence of old-growth lichens on aspen in protected forests. |
format |
Article in Journal/Newspaper |
author |
Nirhamo, Aleksi Pykälä, Juha Halme, Panu Komonen, Atte |
author_facet |
Nirhamo, Aleksi Pykälä, Juha Halme, Panu Komonen, Atte |
author_sort |
Nirhamo, Aleksi |
title |
Lichen communities on Populus tremula are affected by the density of Picea abies |
title_short |
Lichen communities on Populus tremula are affected by the density of Picea abies |
title_full |
Lichen communities on Populus tremula are affected by the density of Picea abies |
title_fullStr |
Lichen communities on Populus tremula are affected by the density of Picea abies |
title_full_unstemmed |
Lichen communities on Populus tremula are affected by the density of Picea abies |
title_sort |
lichen communities on populus tremula are affected by the density of picea abies |
publisher |
Wiley |
publishDate |
2021 |
url |
http://hdl.handle.net/10138/332664 https://doi.org/10.1111/avsc.12584 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_relation |
Applied Vegetation Science 24: 2 1402-2001 Nirhamo, A, Pykälä, J, Halme, P, Komonen, A. Lichen communities on Populus tremula are affected by the density of Picea abies. Appl Veg Sci. 2021; 24:e12584. https://doi.org/10.1111/avsc.12584 https://doi.org/10.1111/avsc.12584 Suomen ympäristökeskus http://hdl.handle.net/10138/332664 |
op_rights |
CC BY 4.0 openAccess |
op_doi |
https://doi.org/10.1111/avsc.12584 |
container_title |
Applied Vegetation Science |
container_volume |
24 |
container_issue |
2 |
_version_ |
1774717487278981120 |