Assessment of defoliation and subsequent growth losses caused by Lymantria dispar using terrestrial laser scanning (TLS)
Key message TLS scans of three surveys before, during and after gypsy moth gradation, allowed high-resolution tracking of defoliation and subsequent inter-annual growth losses on an individual tree level. Foliation strongly determines all tree growth processes but can be reduced by various stress fa...
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creator | Jacobs, Martin Hilmers, Torben Leroy, Benjamin M. L. Lemme, Hannes Kienlein, Sebastian Müller, Jörg Weisser, Wolfgang W. Pretzsch, Hans |
description | Key message
TLS scans of three surveys before, during and after gypsy moth gradation, allowed high-resolution tracking of defoliation and subsequent inter-annual growth losses on an individual tree level.
Foliation strongly determines all tree growth processes but can be reduced by various stress factors. Insect defoliation starts at variable times and is one stress factor that may affect photosynthetic processes and cause immediate reactions like refoliation, which are difficult to detect by surveys repeated at 1-year intervals. This study used a large-scale field experiment in German oak/mixed forests affected by gypsy moths (
Lymantria dispar
) to test the use of terrestrial laser scanning (TLS) for detecting inter-annual foliation and growth losses at the individual tree level caused by the gypsy moth. The experiment comprised two levels of gypsy moth defoliation risk, high (H) and low (L), as well as two pest control treatment levels: spraying with the insecticide Mimic (M) or unsprayed control (C). The factorial design consisted of four treatment combinations (HC, HM, LC, and LM), applied to 11 spatial blocks with a total of 44 plots. The TLS approach detected the defoliation caused by the gypsy moth, estimated as leaf area and crown perforation parameters. For the first time, TLS-derived tree foliation was evaluated based on inter-annual stem growth. Leaf area and crown perforation showed a correlation of + 0.6 and – 0.35, respectively, with basal area increments. Furthermore, this study revealed subsequent growth losses in the same year due to defoliation. Our results show that TLS can offer new opportunities to develop new indicators that monitor foliation at the individual tree level. The crown perforation can describe defoliation or the tree’s vitality based on one scanning campaign, whereas the leaf area needed at least two. |
doi_str_mv | 10.1007/s00468-021-02255-z |
format | Article |
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TLS scans of three surveys before, during and after gypsy moth gradation, allowed high-resolution tracking of defoliation and subsequent inter-annual growth losses on an individual tree level.
Foliation strongly determines all tree growth processes but can be reduced by various stress factors. Insect defoliation starts at variable times and is one stress factor that may affect photosynthetic processes and cause immediate reactions like refoliation, which are difficult to detect by surveys repeated at 1-year intervals. This study used a large-scale field experiment in German oak/mixed forests affected by gypsy moths (
Lymantria dispar
) to test the use of terrestrial laser scanning (TLS) for detecting inter-annual foliation and growth losses at the individual tree level caused by the gypsy moth. The experiment comprised two levels of gypsy moth defoliation risk, high (H) and low (L), as well as two pest control treatment levels: spraying with the insecticide Mimic (M) or unsprayed control (C). The factorial design consisted of four treatment combinations (HC, HM, LC, and LM), applied to 11 spatial blocks with a total of 44 plots. The TLS approach detected the defoliation caused by the gypsy moth, estimated as leaf area and crown perforation parameters. For the first time, TLS-derived tree foliation was evaluated based on inter-annual stem growth. Leaf area and crown perforation showed a correlation of + 0.6 and – 0.35, respectively, with basal area increments. Furthermore, this study revealed subsequent growth losses in the same year due to defoliation. Our results show that TLS can offer new opportunities to develop new indicators that monitor foliation at the individual tree level. The crown perforation can describe defoliation or the tree’s vitality based on one scanning campaign, whereas the leaf area needed at least two.</description><identifier>ISSN: 0931-1890</identifier><identifier>EISSN: 1432-2285</identifier><identifier>DOI: 10.1007/s00468-021-02255-z</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Agriculture ; Biomedical and Life Sciences ; Butterflies & moths ; Defoliation ; Factorial design ; Forestry ; Insecticides ; Insects ; Laser applications ; Leaf area ; Leaves ; Life Sciences ; Lymantria dispar ; Mixed forests ; Original Article ; Pest control ; Photosynthesis ; Plant Anatomy/Development ; Plant Pathology ; Plant Physiology ; Plant Sciences ; Polls & surveys ; Scanning ; Spraying ; Trees</subject><ispartof>Trees (Berlin, West), 2022-04, Vol.36 (2), p.819-834</ispartof><rights>The Author(s) 2022</rights><rights>The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c363t-dd155a384eed9d9d9401d4c54eb9a0d65391089c2f79b00224ee27714fb89b9d3</citedby><cites>FETCH-LOGICAL-c363t-dd155a384eed9d9d9401d4c54eb9a0d65391089c2f79b00224ee27714fb89b9d3</cites><orcidid>0000-0002-2906-8661</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00468-021-02255-z$$EPDF$$P50$$Gspringer$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s00468-021-02255-z$$EHTML$$P50$$Gspringer$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Jacobs, Martin</creatorcontrib><creatorcontrib>Hilmers, Torben</creatorcontrib><creatorcontrib>Leroy, Benjamin M. L.</creatorcontrib><creatorcontrib>Lemme, Hannes</creatorcontrib><creatorcontrib>Kienlein, Sebastian</creatorcontrib><creatorcontrib>Müller, Jörg</creatorcontrib><creatorcontrib>Weisser, Wolfgang W.</creatorcontrib><creatorcontrib>Pretzsch, Hans</creatorcontrib><title>Assessment of defoliation and subsequent growth losses caused by Lymantria dispar using terrestrial laser scanning (TLS)</title><title>Trees (Berlin, West)</title><addtitle>Trees</addtitle><description>Key message
TLS scans of three surveys before, during and after gypsy moth gradation, allowed high-resolution tracking of defoliation and subsequent inter-annual growth losses on an individual tree level.
Foliation strongly determines all tree growth processes but can be reduced by various stress factors. Insect defoliation starts at variable times and is one stress factor that may affect photosynthetic processes and cause immediate reactions like refoliation, which are difficult to detect by surveys repeated at 1-year intervals. This study used a large-scale field experiment in German oak/mixed forests affected by gypsy moths (
Lymantria dispar
) to test the use of terrestrial laser scanning (TLS) for detecting inter-annual foliation and growth losses at the individual tree level caused by the gypsy moth. The experiment comprised two levels of gypsy moth defoliation risk, high (H) and low (L), as well as two pest control treatment levels: spraying with the insecticide Mimic (M) or unsprayed control (C). The factorial design consisted of four treatment combinations (HC, HM, LC, and LM), applied to 11 spatial blocks with a total of 44 plots. The TLS approach detected the defoliation caused by the gypsy moth, estimated as leaf area and crown perforation parameters. For the first time, TLS-derived tree foliation was evaluated based on inter-annual stem growth. Leaf area and crown perforation showed a correlation of + 0.6 and – 0.35, respectively, with basal area increments. Furthermore, this study revealed subsequent growth losses in the same year due to defoliation. Our results show that TLS can offer new opportunities to develop new indicators that monitor foliation at the individual tree level. The crown perforation can describe defoliation or the tree’s vitality based on one scanning campaign, whereas the leaf area needed at least two.</description><subject>Agriculture</subject><subject>Biomedical and Life Sciences</subject><subject>Butterflies & moths</subject><subject>Defoliation</subject><subject>Factorial design</subject><subject>Forestry</subject><subject>Insecticides</subject><subject>Insects</subject><subject>Laser applications</subject><subject>Leaf area</subject><subject>Leaves</subject><subject>Life Sciences</subject><subject>Lymantria dispar</subject><subject>Mixed forests</subject><subject>Original Article</subject><subject>Pest control</subject><subject>Photosynthesis</subject><subject>Plant Anatomy/Development</subject><subject>Plant Pathology</subject><subject>Plant Physiology</subject><subject>Plant Sciences</subject><subject>Polls & surveys</subject><subject>Scanning</subject><subject>Spraying</subject><subject>Trees</subject><issn>0931-1890</issn><issn>1432-2285</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9UE1Lw0AQXUTBWv0Dnha86CE6-5E0eyzFLwh4sJ6XTXZTU9JN3UnQ9te7sYI3GYaBmffe8B4hlwxuGcDsDgFklifAWWyepsn-iEyYFDzhPE-PyQSUYAnLFZySM8Q1AIiM8Qn5miM6xI3zPe1qal3dtY3pm85T4y3FoUT3MYzXVeg--3fadiOBVmZAZ2m5o8VuY3wfGkNtg1sT6ICNX9HeheBw3Le0NegCxcp4P56ul8XrzTk5qU2L7uJ3Tsnbw_1y8ZQUL4_Pi3mRVCITfWItS1MjcumcVWNJYFZWqXSlMmCzVCgGuap4PVMlRO8RyGczJusyV6WyYkquDrrb0EUj2Ot1NwQfX2qeSUgzLlUeUfyAqkL0F1ytt6HZmLDTDPSYsD4krGPC-idhvY8kcSBhBPuVC3_S_7C-AWZugNY</recordid><startdate>20220401</startdate><enddate>20220401</enddate><creator>Jacobs, Martin</creator><creator>Hilmers, Torben</creator><creator>Leroy, Benjamin M. L.</creator><creator>Lemme, Hannes</creator><creator>Kienlein, Sebastian</creator><creator>Müller, Jörg</creator><creator>Weisser, Wolfgang W.</creator><creator>Pretzsch, Hans</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>C6C</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7ST</scope><scope>7X2</scope><scope>8FE</scope><scope>8FH</scope><scope>8FK</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>LK8</scope><scope>M0K</scope><scope>M7P</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0002-2906-8661</orcidid></search><sort><creationdate>20220401</creationdate><title>Assessment of defoliation and subsequent growth losses caused by Lymantria dispar using terrestrial laser scanning (TLS)</title><author>Jacobs, Martin ; Hilmers, Torben ; Leroy, Benjamin M. L. ; Lemme, Hannes ; Kienlein, Sebastian ; Müller, Jörg ; Weisser, Wolfgang W. ; Pretzsch, Hans</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c363t-dd155a384eed9d9d9401d4c54eb9a0d65391089c2f79b00224ee27714fb89b9d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Agriculture</topic><topic>Biomedical and Life Sciences</topic><topic>Butterflies & moths</topic><topic>Defoliation</topic><topic>Factorial design</topic><topic>Forestry</topic><topic>Insecticides</topic><topic>Insects</topic><topic>Laser applications</topic><topic>Leaf area</topic><topic>Leaves</topic><topic>Life Sciences</topic><topic>Lymantria dispar</topic><topic>Mixed forests</topic><topic>Original Article</topic><topic>Pest control</topic><topic>Photosynthesis</topic><topic>Plant Anatomy/Development</topic><topic>Plant Pathology</topic><topic>Plant Physiology</topic><topic>Plant Sciences</topic><topic>Polls & surveys</topic><topic>Scanning</topic><topic>Spraying</topic><topic>Trees</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jacobs, Martin</creatorcontrib><creatorcontrib>Hilmers, Torben</creatorcontrib><creatorcontrib>Leroy, Benjamin M. 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L.</au><au>Lemme, Hannes</au><au>Kienlein, Sebastian</au><au>Müller, Jörg</au><au>Weisser, Wolfgang W.</au><au>Pretzsch, Hans</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Assessment of defoliation and subsequent growth losses caused by Lymantria dispar using terrestrial laser scanning (TLS)</atitle><jtitle>Trees (Berlin, West)</jtitle><stitle>Trees</stitle><date>2022-04-01</date><risdate>2022</risdate><volume>36</volume><issue>2</issue><spage>819</spage><epage>834</epage><pages>819-834</pages><issn>0931-1890</issn><eissn>1432-2285</eissn><abstract>Key message
TLS scans of three surveys before, during and after gypsy moth gradation, allowed high-resolution tracking of defoliation and subsequent inter-annual growth losses on an individual tree level.
Foliation strongly determines all tree growth processes but can be reduced by various stress factors. Insect defoliation starts at variable times and is one stress factor that may affect photosynthetic processes and cause immediate reactions like refoliation, which are difficult to detect by surveys repeated at 1-year intervals. This study used a large-scale field experiment in German oak/mixed forests affected by gypsy moths (
Lymantria dispar
) to test the use of terrestrial laser scanning (TLS) for detecting inter-annual foliation and growth losses at the individual tree level caused by the gypsy moth. The experiment comprised two levels of gypsy moth defoliation risk, high (H) and low (L), as well as two pest control treatment levels: spraying with the insecticide Mimic (M) or unsprayed control (C). The factorial design consisted of four treatment combinations (HC, HM, LC, and LM), applied to 11 spatial blocks with a total of 44 plots. The TLS approach detected the defoliation caused by the gypsy moth, estimated as leaf area and crown perforation parameters. For the first time, TLS-derived tree foliation was evaluated based on inter-annual stem growth. Leaf area and crown perforation showed a correlation of + 0.6 and – 0.35, respectively, with basal area increments. Furthermore, this study revealed subsequent growth losses in the same year due to defoliation. Our results show that TLS can offer new opportunities to develop new indicators that monitor foliation at the individual tree level. The crown perforation can describe defoliation or the tree’s vitality based on one scanning campaign, whereas the leaf area needed at least two.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s00468-021-02255-z</doi><tpages>16</tpages><orcidid>https://orcid.org/0000-0002-2906-8661</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Agriculture Biomedical and Life Sciences Butterflies & moths Defoliation Factorial design Forestry Insecticides Insects Laser applications Leaf area Leaves Life Sciences Lymantria dispar Mixed forests Original Article Pest control Photosynthesis Plant Anatomy/Development Plant Pathology Plant Physiology Plant Sciences Polls & surveys Scanning Spraying Trees |
title | Assessment of defoliation and subsequent growth losses caused by Lymantria dispar using terrestrial laser scanning (TLS) |
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