Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, Alaska
The primary successional sequence in Glacier Bay, Alaska represents a 230-year record of the development of nitrogen (N) dynamics. Because of low inputs of N in precipitation and the absence of initial soil N pools, the pattern of N accumulation is strongly biologically controlled. The simple succes...
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1998
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ftuninhampshire:oai:scholars.unh.edu:faculty_pubs-1088 2023-05-15T16:20:20+02:00 Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, Alaska Hobbie, Erik A. Macko, Stephen A. Shugart, Herman H. 1998-10-01T07:00:00Z https://scholars.unh.edu/faculty_pubs/89 https://doi.org/10.1016/S0009-2541(98)00092-8 unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/faculty_pubs/89 https://doi.org/10.1016/S0009-2541(98)00092-8 © 1998 Elsevier Science B.V. All rights reserved. Faculty Publications N dynamics Glacier Bay Alaska N isotopes text 1998 ftuninhampshire https://doi.org/10.1016/S0009-2541(98)00092-8 2023-01-30T21:49:32Z The primary successional sequence in Glacier Bay, Alaska represents a 230-year record of the development of nitrogen (N) dynamics. Because of low inputs of N in precipitation and the absence of initial soil N pools, the pattern of N accumulation is strongly biologically controlled. The simple successional sequence at Glacier Bay is dominated by two main species (Alnus sinuata and Picea sitchensis), thus the influence these species have on N dynamics is more easily deduced than in more complex systems. Along a successional sequence in Glacier Bay, N mineralization rates, foliage and soil C:N, and foliage and soil values in six sites ranging in age from 20 to 225 years old were examined. It is concluded that: (1) Alnus sinuata and Dryas drummondii derived most of their N through the fixation of atmospheric N; (2) under conditions of high N availability, differences among species in plant preference for ammonium or nitrate can be deduced from values; (3) over time, organic soil N separates into two isotopically distinct pools which differ in their turnover rate; (4) the transition from an alder-dominated to a spruce-dominated system results in slower N cycling; and (5) previous site conditions are an important factor in explaining patterns in values. Text glacier Alaska University of New Hampshire: Scholars Repository Glacier Bay Chemical Geology 152 1-2 3 11 |
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Open Polar |
collection |
University of New Hampshire: Scholars Repository |
op_collection_id |
ftuninhampshire |
language |
unknown |
topic |
N dynamics Glacier Bay Alaska N isotopes |
spellingShingle |
N dynamics Glacier Bay Alaska N isotopes Hobbie, Erik A. Macko, Stephen A. Shugart, Herman H. Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, Alaska |
topic_facet |
N dynamics Glacier Bay Alaska N isotopes |
description |
The primary successional sequence in Glacier Bay, Alaska represents a 230-year record of the development of nitrogen (N) dynamics. Because of low inputs of N in precipitation and the absence of initial soil N pools, the pattern of N accumulation is strongly biologically controlled. The simple successional sequence at Glacier Bay is dominated by two main species (Alnus sinuata and Picea sitchensis), thus the influence these species have on N dynamics is more easily deduced than in more complex systems. Along a successional sequence in Glacier Bay, N mineralization rates, foliage and soil C:N, and foliage and soil values in six sites ranging in age from 20 to 225 years old were examined. It is concluded that: (1) Alnus sinuata and Dryas drummondii derived most of their N through the fixation of atmospheric N; (2) under conditions of high N availability, differences among species in plant preference for ammonium or nitrate can be deduced from values; (3) over time, organic soil N separates into two isotopically distinct pools which differ in their turnover rate; (4) the transition from an alder-dominated to a spruce-dominated system results in slower N cycling; and (5) previous site conditions are an important factor in explaining patterns in values. |
format |
Text |
author |
Hobbie, Erik A. Macko, Stephen A. Shugart, Herman H. |
author_facet |
Hobbie, Erik A. Macko, Stephen A. Shugart, Herman H. |
author_sort |
Hobbie, Erik A. |
title |
Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, Alaska |
title_short |
Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, Alaska |
title_full |
Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, Alaska |
title_fullStr |
Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, Alaska |
title_full_unstemmed |
Patterns in N dynamics and N isotopes during primary succession in Glacier Bay, Alaska |
title_sort |
patterns in n dynamics and n isotopes during primary succession in glacier bay, alaska |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
1998 |
url |
https://scholars.unh.edu/faculty_pubs/89 https://doi.org/10.1016/S0009-2541(98)00092-8 |
geographic |
Glacier Bay |
geographic_facet |
Glacier Bay |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
Faculty Publications |
op_relation |
https://scholars.unh.edu/faculty_pubs/89 https://doi.org/10.1016/S0009-2541(98)00092-8 |
op_rights |
© 1998 Elsevier Science B.V. All rights reserved. |
op_doi |
https://doi.org/10.1016/S0009-2541(98)00092-8 |
container_title |
Chemical Geology |
container_volume |
152 |
container_issue |
1-2 |
container_start_page |
3 |
op_container_end_page |
11 |
_version_ |
1766008238351843328 |