Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes
The Mackenzie Delta of the Canadian arctic is a complex environment, containing ~25,000 lakes, where annual river flooding may exert a considerable degree of control over the ecological characteristics of lakes in the system. The solute composition of 92 lakes representing differing frequencies and...
Published in: | Limnology and Oceanography |
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crwiley:10.4319/lo.1998.43.7.1530 2024-06-23T07:50:36+00:00 Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes Lesack, Lance F. W. Marsh, Philip Hecky, Robert E. 1998 http://dx.doi.org/10.4319/lo.1998.43.7.1530 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1998.43.7.1530 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1998.43.7.1530 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 43, issue 7, page 1530-1543 ISSN 0024-3590 1939-5590 journal-article 1998 crwiley https://doi.org/10.4319/lo.1998.43.7.1530 2024-06-11T04:47:49Z The Mackenzie Delta of the Canadian arctic is a complex environment, containing ~25,000 lakes, where annual river flooding may exert a considerable degree of control over the ecological characteristics of lakes in the system. The solute composition of 92 lakes representing differing frequencies and durations of flooding was determined from among three clusters of lakes distributed over a north‐south (N‐S) gradient along the eastern margin of the delta. The solute compositions yield an end‐member system of dominant solutes (shifting among Ca 2+ plus HCO 3 − , Mg 2+ plus HCO 3 − , Ca 2+ plus SO 4 2− ) in correspondence with a gradient from frequently flooded lakes to infrequently flooded lakes. This end‐member system is consistent between years and along the N‐S elevational gradient of the delta. The solute composition of the frequently flooded lakes appears to be stable among years, while the composition among infrequently flooded lakes is not stable. The end‐member system is consistent with the seasonal dynamics in solute composition observed for three lakes, representing differing flooding regimes, plus the dynamics of the nearest main distributary channel. The dominance of local hydrological and biogeochemical processes in about one‐third of the lakes in the delta, where flooding occurs less frequently than every year, is not consistent with a common paradigm where flooding from river channels is thought to dominate the annual flushing, nutrient replenishment, and reinitialization of lacustrine ecosystems on the floodplains of major world rivers. Article in Journal/Newspaper Arctic Mackenzie Delta Wiley Online Library Arctic Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Limnology and Oceanography 43 7 1530 1543 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
The Mackenzie Delta of the Canadian arctic is a complex environment, containing ~25,000 lakes, where annual river flooding may exert a considerable degree of control over the ecological characteristics of lakes in the system. The solute composition of 92 lakes representing differing frequencies and durations of flooding was determined from among three clusters of lakes distributed over a north‐south (N‐S) gradient along the eastern margin of the delta. The solute compositions yield an end‐member system of dominant solutes (shifting among Ca 2+ plus HCO 3 − , Mg 2+ plus HCO 3 − , Ca 2+ plus SO 4 2− ) in correspondence with a gradient from frequently flooded lakes to infrequently flooded lakes. This end‐member system is consistent between years and along the N‐S elevational gradient of the delta. The solute composition of the frequently flooded lakes appears to be stable among years, while the composition among infrequently flooded lakes is not stable. The end‐member system is consistent with the seasonal dynamics in solute composition observed for three lakes, representing differing flooding regimes, plus the dynamics of the nearest main distributary channel. The dominance of local hydrological and biogeochemical processes in about one‐third of the lakes in the delta, where flooding occurs less frequently than every year, is not consistent with a common paradigm where flooding from river channels is thought to dominate the annual flushing, nutrient replenishment, and reinitialization of lacustrine ecosystems on the floodplains of major world rivers. |
format |
Article in Journal/Newspaper |
author |
Lesack, Lance F. W. Marsh, Philip Hecky, Robert E. |
spellingShingle |
Lesack, Lance F. W. Marsh, Philip Hecky, Robert E. Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes |
author_facet |
Lesack, Lance F. W. Marsh, Philip Hecky, Robert E. |
author_sort |
Lesack, Lance F. W. |
title |
Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes |
title_short |
Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes |
title_full |
Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes |
title_fullStr |
Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes |
title_full_unstemmed |
Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes |
title_sort |
spatial and temporal dynamics of major solute chemistry among mackenzie delta lakes |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.4319/lo.1998.43.7.1530 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1998.43.7.1530 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1998.43.7.1530 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Mackenzie Delta |
geographic_facet |
Arctic Mackenzie Delta |
genre |
Arctic Mackenzie Delta |
genre_facet |
Arctic Mackenzie Delta |
op_source |
Limnology and Oceanography volume 43, issue 7, page 1530-1543 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1998.43.7.1530 |
container_title |
Limnology and Oceanography |
container_volume |
43 |
container_issue |
7 |
container_start_page |
1530 |
op_container_end_page |
1543 |
_version_ |
1802641514562584576 |