Tree Growth and Competition in a Betula platyphylla-Larix cajanderi Post-fire Forest in Central Kamchatka
• Background and Aims Fire is the dominant disturbance in central Kamchatka boreal forests, yet patterns and mechanisms of stand recovery have not been investigated. • Methods Measurements were made of 1433 stems ≥1·3 m height and annual radial increments of 225 randomly selected trees in a 0·4-ha p...
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fthighwire:oai:open-archive.highwire.org:annbot:94/3/333 2023-05-15T16:59:05+02:00 Tree Growth and Competition in a Betula platyphylla-Larix cajanderi Post-fire Forest in Central Kamchatka DOLEZAL, JIRÍ ISHII, HIROAKI VETROVA, VALENTINA P. SUMIDA, AKIHIRO HARA, TOSHIHIKO 2004-09-01 00:00:00.0 text/html http://aob.oxfordjournals.org/cgi/content/short/94/3/333 https://doi.org/10.1093/aob/mch149 en eng Oxford University Press http://aob.oxfordjournals.org/cgi/content/short/94/3/333 http://dx.doi.org/10.1093/aob/mch149 Copyright (C) 2004, Oxford University Press ORIGINAL ARTICLES TEXT 2004 fthighwire https://doi.org/10.1093/aob/mch149 2007-06-25T06:00:23Z • Background and Aims Fire is the dominant disturbance in central Kamchatka boreal forests, yet patterns and mechanisms of stand recovery have not been investigated. • Methods Measurements were made of 1433 stems ≥1·3 m height and annual radial increments of 225 randomly selected trees in a 0·4-ha plot of a 53-year-old fire-origin mixed-species stand to examine the spatio-temporal variation in establishment, growth, size inequality and the mode of competition among individual trees. Growth variations were related to tree size, age and local interference with neighbours. • Key Results Betula platyphylla formed the main canopy following a fire in 1947, with Larix cajanderi and Pinus pumila progressively reinvading the lower tree and shrub stratum. Most B. platyphylla originated from sprouts in small patches (polycormons) during the first 15 post-fire years. Betula platyphylla had normal distributions of diameter and age classes, but negatively skewed height distribution, as expected from shade-intolerant, pioneer species. Larix cajanderi had fewer tall and many short individuals. The smaller and younger B. platyphyll a grew disproportionately more in diameter than larger trees from 1950 to 1975, and hence stem size inequalities decreased. The reverse trend was observed from 1995 to 2000: larger trees grew more, indicating an increasing asymmetry of competition for light. Betula platyphylla had steady diameter growth in the first 25 post-fire years, after which the growth declined in smaller trees. Neighbourhood analysis showed that the decline resulted from increased competition from taller neighbours. • Conclusions The observed growth patterns suggest that mode of interactions altered during stand development from early stages of weak competition for soil resources released by fire to later stages of asymmetric competition for light. Asymmetric crown competition started later than reported in other studies, which can be attributed to the lower stem density leaving much space for individual growth, greater ... Text Kamchatka HighWire Press (Stanford University) Annals of Botany 94 3 333 343 |
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English |
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ORIGINAL ARTICLES |
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ORIGINAL ARTICLES DOLEZAL, JIRÍ ISHII, HIROAKI VETROVA, VALENTINA P. SUMIDA, AKIHIRO HARA, TOSHIHIKO Tree Growth and Competition in a Betula platyphylla-Larix cajanderi Post-fire Forest in Central Kamchatka |
topic_facet |
ORIGINAL ARTICLES |
description |
• Background and Aims Fire is the dominant disturbance in central Kamchatka boreal forests, yet patterns and mechanisms of stand recovery have not been investigated. • Methods Measurements were made of 1433 stems ≥1·3 m height and annual radial increments of 225 randomly selected trees in a 0·4-ha plot of a 53-year-old fire-origin mixed-species stand to examine the spatio-temporal variation in establishment, growth, size inequality and the mode of competition among individual trees. Growth variations were related to tree size, age and local interference with neighbours. • Key Results Betula platyphylla formed the main canopy following a fire in 1947, with Larix cajanderi and Pinus pumila progressively reinvading the lower tree and shrub stratum. Most B. platyphylla originated from sprouts in small patches (polycormons) during the first 15 post-fire years. Betula platyphylla had normal distributions of diameter and age classes, but negatively skewed height distribution, as expected from shade-intolerant, pioneer species. Larix cajanderi had fewer tall and many short individuals. The smaller and younger B. platyphyll a grew disproportionately more in diameter than larger trees from 1950 to 1975, and hence stem size inequalities decreased. The reverse trend was observed from 1995 to 2000: larger trees grew more, indicating an increasing asymmetry of competition for light. Betula platyphylla had steady diameter growth in the first 25 post-fire years, after which the growth declined in smaller trees. Neighbourhood analysis showed that the decline resulted from increased competition from taller neighbours. • Conclusions The observed growth patterns suggest that mode of interactions altered during stand development from early stages of weak competition for soil resources released by fire to later stages of asymmetric competition for light. Asymmetric crown competition started later than reported in other studies, which can be attributed to the lower stem density leaving much space for individual growth, greater ... |
format |
Text |
author |
DOLEZAL, JIRÍ ISHII, HIROAKI VETROVA, VALENTINA P. SUMIDA, AKIHIRO HARA, TOSHIHIKO |
author_facet |
DOLEZAL, JIRÍ ISHII, HIROAKI VETROVA, VALENTINA P. SUMIDA, AKIHIRO HARA, TOSHIHIKO |
author_sort |
DOLEZAL, JIRÍ |
title |
Tree Growth and Competition in a Betula platyphylla-Larix cajanderi Post-fire Forest in Central Kamchatka |
title_short |
Tree Growth and Competition in a Betula platyphylla-Larix cajanderi Post-fire Forest in Central Kamchatka |
title_full |
Tree Growth and Competition in a Betula platyphylla-Larix cajanderi Post-fire Forest in Central Kamchatka |
title_fullStr |
Tree Growth and Competition in a Betula platyphylla-Larix cajanderi Post-fire Forest in Central Kamchatka |
title_full_unstemmed |
Tree Growth and Competition in a Betula platyphylla-Larix cajanderi Post-fire Forest in Central Kamchatka |
title_sort |
tree growth and competition in a betula platyphylla-larix cajanderi post-fire forest in central kamchatka |
publisher |
Oxford University Press |
publishDate |
2004 |
url |
http://aob.oxfordjournals.org/cgi/content/short/94/3/333 https://doi.org/10.1093/aob/mch149 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
http://aob.oxfordjournals.org/cgi/content/short/94/3/333 http://dx.doi.org/10.1093/aob/mch149 |
op_rights |
Copyright (C) 2004, Oxford University Press |
op_doi |
https://doi.org/10.1093/aob/mch149 |
container_title |
Annals of Botany |
container_volume |
94 |
container_issue |
3 |
container_start_page |
333 |
op_container_end_page |
343 |
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1766051272640692224 |