Threshold Responses of Canopy Cover and Tree Growth to Drought and Siberian silk Moth Outbreak in Southern Taiga Picea obovata Forests
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). The consecutive occurrence of drought and insect outbreaks c...
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Online Access: | http://hdl.handle.net/10261/359875 https://doi.org/10.3390/f13050768 |
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ftcsic:oai:digital.csic.es:10261/359875 2024-06-23T07:57:07+00:00 Threshold Responses of Canopy Cover and Tree Growth to Drought and Siberian silk Moth Outbreak in Southern Taiga Picea obovata Forests Camarero, Jesús Julio Shestakova, Tatiana A. Pizarro Gavilán, Manuel European Commission Camarero, Jesús Julio Pizarro Gavilán, Manuel 2022-05 application/pdf http://hdl.handle.net/10261/359875 https://doi.org/10.3390/f13050768 en eng Multidisciplinary Digital Publishing Institute Publisher's version The underlying dataset has been published as supplementary material of the article in the publisher platform at https://doi.org/10.3390/f13050768 https://doi.org/10.3390/f13050768 Sí Forests 13(5): 768 (2022) http://hdl.handle.net/10261/359875 doi:10.3390/f13050768 1999-4907 open Climate warming Defoliation Dendrolimus sibiricus Lepidoptera Picea obovata Siberia artículo 2022 ftcsic https://doi.org/10.3390/f13050768 2024-06-11T23:56:09Z © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). The consecutive occurrence of drought and insect outbreaks could lead to cumulative, negative impacts on boreal forest productivity. To disentangle how both stressors affected productivity, we compared changes in tree canopy cover and radial growth after a severe outbreak in Siberian spruce (Picea obovata) southern taiga forests. Specifically, we studied the impacts of the 2012 severe drought followed by a Siberian silk moth (Dendrolimus sibiricus, hereafter SSM) outbreak, which started in 2016, on spruce forests by comparing one non-defoliated site and two, nearby fully defoliated sites, using remote sensing and tree-ring data. The SSM outbreak caused total defoliation and death of trees in the infested stands. We found a sharp drop (−32%) in the normalized difference infrared index and reduced radial growth in the defoliated sites in 2018. The growth reduction due to the 2012 drought was −37%, whereas it dropped to 4% of pre-outbreak growth in 2018. Tree growth was constrained by warm and dry conditions from June to July, but such a negative effect of summer water shortage was more pronounced in the defoliated sites than in the non-defoliated site. This suggests a predisposition of sites where trees show a higher growth responsivity to drought to SSM-outbreak defoliation. Insect defoliation and drought differently impacted taiga forest productivity since tree cover dropped due to the SSM outbreak, whereas tree growth was reduced either by summer drought or by the SSM outbreak. The impacts of abiotic and biotic stressors on boreal forests could be disentangled by combining measures or proxies of canopy cover and radial growth which also allow the investigation of drought sensitivity predisposes to insect damage. This research was funded by the European Union’s Seventh ... Article in Journal/Newspaper taiga Siberia Digital.CSIC (Spanish National Research Council) Forests 13 5 768 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Climate warming Defoliation Dendrolimus sibiricus Lepidoptera Picea obovata Siberia |
spellingShingle |
Climate warming Defoliation Dendrolimus sibiricus Lepidoptera Picea obovata Siberia Camarero, Jesús Julio Shestakova, Tatiana A. Pizarro Gavilán, Manuel Threshold Responses of Canopy Cover and Tree Growth to Drought and Siberian silk Moth Outbreak in Southern Taiga Picea obovata Forests |
topic_facet |
Climate warming Defoliation Dendrolimus sibiricus Lepidoptera Picea obovata Siberia |
description |
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). The consecutive occurrence of drought and insect outbreaks could lead to cumulative, negative impacts on boreal forest productivity. To disentangle how both stressors affected productivity, we compared changes in tree canopy cover and radial growth after a severe outbreak in Siberian spruce (Picea obovata) southern taiga forests. Specifically, we studied the impacts of the 2012 severe drought followed by a Siberian silk moth (Dendrolimus sibiricus, hereafter SSM) outbreak, which started in 2016, on spruce forests by comparing one non-defoliated site and two, nearby fully defoliated sites, using remote sensing and tree-ring data. The SSM outbreak caused total defoliation and death of trees in the infested stands. We found a sharp drop (−32%) in the normalized difference infrared index and reduced radial growth in the defoliated sites in 2018. The growth reduction due to the 2012 drought was −37%, whereas it dropped to 4% of pre-outbreak growth in 2018. Tree growth was constrained by warm and dry conditions from June to July, but such a negative effect of summer water shortage was more pronounced in the defoliated sites than in the non-defoliated site. This suggests a predisposition of sites where trees show a higher growth responsivity to drought to SSM-outbreak defoliation. Insect defoliation and drought differently impacted taiga forest productivity since tree cover dropped due to the SSM outbreak, whereas tree growth was reduced either by summer drought or by the SSM outbreak. The impacts of abiotic and biotic stressors on boreal forests could be disentangled by combining measures or proxies of canopy cover and radial growth which also allow the investigation of drought sensitivity predisposes to insect damage. This research was funded by the European Union’s Seventh ... |
author2 |
European Commission Camarero, Jesús Julio Pizarro Gavilán, Manuel |
format |
Article in Journal/Newspaper |
author |
Camarero, Jesús Julio Shestakova, Tatiana A. Pizarro Gavilán, Manuel |
author_facet |
Camarero, Jesús Julio Shestakova, Tatiana A. Pizarro Gavilán, Manuel |
author_sort |
Camarero, Jesús Julio |
title |
Threshold Responses of Canopy Cover and Tree Growth to Drought and Siberian silk Moth Outbreak in Southern Taiga Picea obovata Forests |
title_short |
Threshold Responses of Canopy Cover and Tree Growth to Drought and Siberian silk Moth Outbreak in Southern Taiga Picea obovata Forests |
title_full |
Threshold Responses of Canopy Cover and Tree Growth to Drought and Siberian silk Moth Outbreak in Southern Taiga Picea obovata Forests |
title_fullStr |
Threshold Responses of Canopy Cover and Tree Growth to Drought and Siberian silk Moth Outbreak in Southern Taiga Picea obovata Forests |
title_full_unstemmed |
Threshold Responses of Canopy Cover and Tree Growth to Drought and Siberian silk Moth Outbreak in Southern Taiga Picea obovata Forests |
title_sort |
threshold responses of canopy cover and tree growth to drought and siberian silk moth outbreak in southern taiga picea obovata forests |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
http://hdl.handle.net/10261/359875 https://doi.org/10.3390/f13050768 |
genre |
taiga Siberia |
genre_facet |
taiga Siberia |
op_relation |
Publisher's version The underlying dataset has been published as supplementary material of the article in the publisher platform at https://doi.org/10.3390/f13050768 https://doi.org/10.3390/f13050768 Sí Forests 13(5): 768 (2022) http://hdl.handle.net/10261/359875 doi:10.3390/f13050768 1999-4907 |
op_rights |
open |
op_doi |
https://doi.org/10.3390/f13050768 |
container_title |
Forests |
container_volume |
13 |
container_issue |
5 |
container_start_page |
768 |
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1802650584663195648 |