Long‐term patterns of leaf, shoot and wood production after insect herbivory in the Mountain Birch
Summary The pattern of responses of adult trees of Mountain Birch ( Betula pubescens ssp. czerepanovii ) to an outbreak of a folivorous insect ( Epirrita autumnata ) causing ≈90% defoliation was studied over 8 years in a subarctic area in northern Sweden. Tree recovery was monitored in terms of the...
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crwiley:10.1111/j.1365-2435.2003.00792.x 2024-06-23T07:55:37+00:00 Long‐term patterns of leaf, shoot and wood production after insect herbivory in the Mountain Birch Karlsson, P. S. Weih, M. 2003 http://dx.doi.org/10.1111/j.1365-2435.2003.00792.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2435.2003.00792.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2435.2003.00792.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Functional Ecology volume 17, issue 6, page 841-850 ISSN 0269-8463 1365-2435 journal-article 2003 crwiley https://doi.org/10.1111/j.1365-2435.2003.00792.x 2024-06-11T04:46:21Z Summary The pattern of responses of adult trees of Mountain Birch ( Betula pubescens ssp. czerepanovii ) to an outbreak of a folivorous insect ( Epirrita autumnata ) causing ≈90% defoliation was studied over 8 years in a subarctic area in northern Sweden. Tree recovery was monitored in terms of the numbers, area, mass and nitrogen content of leaves, the numbers of leaf‐carrying long and short shoots, and the widths of annual tree rings in stems. The most prominent characteristic of defoliated trees was a threefold increase in the proportion of long shoots 1 year after defoliation. These shoots subsequently produced many new leaf‐carrying short shoots, resulting in shoot populations ≈50% larger than those of control trees. Thereafter the most strongly defoliated trees showed decreasing leaf area. Defoliated trees produced more female catkins but fewer male catkins than control trees. Released apical dominance did not result in any overcompensation in terms of growth or leaf area production. However, it presumably increased the rate of recovery from herbivory. For the most strongly defoliated trees, the benefits from increased production of long shoots was not sustainable. Article in Journal/Newspaper Northern Sweden Subarctic Wiley Online Library Functional Ecology 17 6 841 850 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary The pattern of responses of adult trees of Mountain Birch ( Betula pubescens ssp. czerepanovii ) to an outbreak of a folivorous insect ( Epirrita autumnata ) causing ≈90% defoliation was studied over 8 years in a subarctic area in northern Sweden. Tree recovery was monitored in terms of the numbers, area, mass and nitrogen content of leaves, the numbers of leaf‐carrying long and short shoots, and the widths of annual tree rings in stems. The most prominent characteristic of defoliated trees was a threefold increase in the proportion of long shoots 1 year after defoliation. These shoots subsequently produced many new leaf‐carrying short shoots, resulting in shoot populations ≈50% larger than those of control trees. Thereafter the most strongly defoliated trees showed decreasing leaf area. Defoliated trees produced more female catkins but fewer male catkins than control trees. Released apical dominance did not result in any overcompensation in terms of growth or leaf area production. However, it presumably increased the rate of recovery from herbivory. For the most strongly defoliated trees, the benefits from increased production of long shoots was not sustainable. |
format |
Article in Journal/Newspaper |
author |
Karlsson, P. S. Weih, M. |
spellingShingle |
Karlsson, P. S. Weih, M. Long‐term patterns of leaf, shoot and wood production after insect herbivory in the Mountain Birch |
author_facet |
Karlsson, P. S. Weih, M. |
author_sort |
Karlsson, P. S. |
title |
Long‐term patterns of leaf, shoot and wood production after insect herbivory in the Mountain Birch |
title_short |
Long‐term patterns of leaf, shoot and wood production after insect herbivory in the Mountain Birch |
title_full |
Long‐term patterns of leaf, shoot and wood production after insect herbivory in the Mountain Birch |
title_fullStr |
Long‐term patterns of leaf, shoot and wood production after insect herbivory in the Mountain Birch |
title_full_unstemmed |
Long‐term patterns of leaf, shoot and wood production after insect herbivory in the Mountain Birch |
title_sort |
long‐term patterns of leaf, shoot and wood production after insect herbivory in the mountain birch |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1111/j.1365-2435.2003.00792.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2435.2003.00792.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2435.2003.00792.x |
genre |
Northern Sweden Subarctic |
genre_facet |
Northern Sweden Subarctic |
op_source |
Functional Ecology volume 17, issue 6, page 841-850 ISSN 0269-8463 1365-2435 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2435.2003.00792.x |
container_title |
Functional Ecology |
container_volume |
17 |
container_issue |
6 |
container_start_page |
841 |
op_container_end_page |
850 |
_version_ |
1802648269264781312 |