Regulation of fine root dynamics by mammalian browsers in early successional Alaskan taiga forests.
Abstract. The effects of browsing by moose and snowshoe hares on fine root production, mortality, and decomposition in early successional forest ecosystems along the Tanana River floodplain in interior Alaska were studied over a 3-yr period using minirhizotrons placed inside and outside large perman...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1073.3949 2023-05-15T18:31:02+02:00 Regulation of fine root dynamics by mammalian browsers in early successional Alaskan taiga forests. Roger W Ruess Ronald L Hendrick John P And Bryant The Pennsylvania State University CiteSeerX Archives 1998 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1073.3949 http://www.iab.uaf.edu/people/roger_ruess/Ruess%20et%20al%201998.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1073.3949 http://www.iab.uaf.edu/people/roger_ruess/Ruess%20et%20al%201998.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.iab.uaf.edu/people/roger_ruess/Ruess%20et%20al%201998.pdf text 1998 ftciteseerx 2020-04-26T00:25:51Z Abstract. The effects of browsing by moose and snowshoe hares on fine root production, mortality, and decomposition in early successional forest ecosystems along the Tanana River floodplain in interior Alaska were studied over a 3-yr period using minirhizotrons placed inside and outside large permanent exclosures. Fine root production and mortality varied seasonally, with greatest rates of production occurring during June each year, and greatest rates of mortality occurring in fall and over winter. Annual production and mortality during 1993, a year of unusually low precipitation, were significantly higher than during either 1992 or 1994. Aboveground herbivory significantly reduced monthly rates of fine root production, and on an annual basis, fine root production of browsed plots (311.4 Ϯ 31.7 mm·tube Ϫ1 ·yr Ϫ1 ) was significantly less than that of unbrowsed plots (453.8 Ϯ 49.8 mm·tube Ϫ1 ·yr Ϫ1 ) when averaged over 3 yr. Because herbivory had less of an effect on monthly or annual rates of fine root mortality, fine root turnover was higher for browsed stands. Browsed plants had a higher percentage of annual production in surface soil layers. Production on all plots shifted to deeper soil layers as the growing season progressed; this shift occurred deeper in the profile for unbrowsed plants than for browsed plants. We used a parameter estimation program (Program MARK) to generate fine root survival and decomposition estimates from models testing the direct and interactive effects of time period, cohort (i.e., when the root first appeared) age of the root, browsing, and site on fine root longevity and decomposability. Cohort effects showed that survival of fine roots was greatest for roots that first appeared in May, and that survival progressively declined for roots first appearing during subsequent time periods, while age-based estimates showed a rapid decline in survival over the interval following first appearance. Survival and decomposition estimates were inversely correlated within a growing season, with ... Text taiga Alaska Unknown |
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ftciteseerx |
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English |
description |
Abstract. The effects of browsing by moose and snowshoe hares on fine root production, mortality, and decomposition in early successional forest ecosystems along the Tanana River floodplain in interior Alaska were studied over a 3-yr period using minirhizotrons placed inside and outside large permanent exclosures. Fine root production and mortality varied seasonally, with greatest rates of production occurring during June each year, and greatest rates of mortality occurring in fall and over winter. Annual production and mortality during 1993, a year of unusually low precipitation, were significantly higher than during either 1992 or 1994. Aboveground herbivory significantly reduced monthly rates of fine root production, and on an annual basis, fine root production of browsed plots (311.4 Ϯ 31.7 mm·tube Ϫ1 ·yr Ϫ1 ) was significantly less than that of unbrowsed plots (453.8 Ϯ 49.8 mm·tube Ϫ1 ·yr Ϫ1 ) when averaged over 3 yr. Because herbivory had less of an effect on monthly or annual rates of fine root mortality, fine root turnover was higher for browsed stands. Browsed plants had a higher percentage of annual production in surface soil layers. Production on all plots shifted to deeper soil layers as the growing season progressed; this shift occurred deeper in the profile for unbrowsed plants than for browsed plants. We used a parameter estimation program (Program MARK) to generate fine root survival and decomposition estimates from models testing the direct and interactive effects of time period, cohort (i.e., when the root first appeared) age of the root, browsing, and site on fine root longevity and decomposability. Cohort effects showed that survival of fine roots was greatest for roots that first appeared in May, and that survival progressively declined for roots first appearing during subsequent time periods, while age-based estimates showed a rapid decline in survival over the interval following first appearance. Survival and decomposition estimates were inversely correlated within a growing season, with ... |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Roger W Ruess Ronald L Hendrick John P And Bryant |
spellingShingle |
Roger W Ruess Ronald L Hendrick John P And Bryant Regulation of fine root dynamics by mammalian browsers in early successional Alaskan taiga forests. |
author_facet |
Roger W Ruess Ronald L Hendrick John P And Bryant |
author_sort |
Roger W Ruess |
title |
Regulation of fine root dynamics by mammalian browsers in early successional Alaskan taiga forests. |
title_short |
Regulation of fine root dynamics by mammalian browsers in early successional Alaskan taiga forests. |
title_full |
Regulation of fine root dynamics by mammalian browsers in early successional Alaskan taiga forests. |
title_fullStr |
Regulation of fine root dynamics by mammalian browsers in early successional Alaskan taiga forests. |
title_full_unstemmed |
Regulation of fine root dynamics by mammalian browsers in early successional Alaskan taiga forests. |
title_sort |
regulation of fine root dynamics by mammalian browsers in early successional alaskan taiga forests. |
publishDate |
1998 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1073.3949 http://www.iab.uaf.edu/people/roger_ruess/Ruess%20et%20al%201998.pdf |
genre |
taiga Alaska |
genre_facet |
taiga Alaska |
op_source |
http://www.iab.uaf.edu/people/roger_ruess/Ruess%20et%20al%201998.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1073.3949 http://www.iab.uaf.edu/people/roger_ruess/Ruess%20et%20al%201998.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766214674565562368 |