Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds
Across the circumpolar north, the fate of small freshwater ponds and lakes (< 1 km 2 ) has been the subject of scientific interest due to their ubiquity in the landscape, capacity to exchange carbon and energy with the atmosphere, and their potential to inform researchers about past climates thro...
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ftdoajarticles:oai:doaj.org/article:e8b08549f06a49eba956db78e49ad63f 2023-05-15T16:35:33+02:00 Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds M. Q. Morison M. L. Macrae R. M. Petrone L. Fishback 2017-12-01T00:00:00Z https://doi.org/10.5194/bg-14-5471-2017 https://doaj.org/article/e8b08549f06a49eba956db78e49ad63f EN eng Copernicus Publications https://www.biogeosciences.net/14/5471/2017/bg-14-5471-2017.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-14-5471-2017 1726-4170 1726-4189 https://doaj.org/article/e8b08549f06a49eba956db78e49ad63f Biogeosciences, Vol 14, Pp 5471-5485 (2017) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/bg-14-5471-2017 2022-12-31T03:24:36Z Across the circumpolar north, the fate of small freshwater ponds and lakes (< 1 km 2 ) has been the subject of scientific interest due to their ubiquity in the landscape, capacity to exchange carbon and energy with the atmosphere, and their potential to inform researchers about past climates through sediment records. A changing climate has implications for the capacity of ponds and lakes to support organisms and store carbon, which in turn has important feedbacks to climate change. Thus, an improved understanding of pond biogeochemistry is needed. To characterize spatial and temporal patterns in water column chemistry, a suite of tundra ponds were examined to answer the following research questions: (1) does temporal variability exceed spatial variability? (2) If temporal variability exists, do all ponds (or groups of ponds) behave in a similar temporal pattern, linked to seasonal hydrologic drivers or precipitation events? Six shallow ponds located in the Hudson Bay Lowlands region were monitored between May and October 2015 (inclusive, spanning the entire open-water period). The ponds span a range of biophysical conditions including pond area, perimeter, depth, and shoreline development. Water samples were collected regularly, both bimonthly over the ice-free season and intensively during and following a large summer storm event. Samples were analysed for nitrogen speciation (NO 3 − , NH 4 + , dissolved organic nitrogen) and major ions (Cl − , SO 4 2− , K + , Ca 2+ , Mg 2+ , Na + ). Across all ponds, temporal variability (across the season and within a single rain event) exceeded spatial variability (variation among ponds) in concentrations of several major species (Cl − , SO 4 2− , K + , Ca 2+ , Na + ). Evapoconcentration and dilution of pond water with precipitation and runoff inputs were the dominant processes influencing a set of chemical species which are hydrologically driven (Cl − , Na + , K + , Mg 2+ , dissolved organic nitrogen), whereas the dissolved inorganic nitrogen species were likely mediated ... Article in Journal/Newspaper Hudson Bay Ice permafrost Tundra Directory of Open Access Journals: DOAJ Articles Hudson Hudson Bay Biogeosciences 14 23 5471 5485 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 M. Q. Morison M. L. Macrae R. M. Petrone L. Fishback Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Across the circumpolar north, the fate of small freshwater ponds and lakes (< 1 km 2 ) has been the subject of scientific interest due to their ubiquity in the landscape, capacity to exchange carbon and energy with the atmosphere, and their potential to inform researchers about past climates through sediment records. A changing climate has implications for the capacity of ponds and lakes to support organisms and store carbon, which in turn has important feedbacks to climate change. Thus, an improved understanding of pond biogeochemistry is needed. To characterize spatial and temporal patterns in water column chemistry, a suite of tundra ponds were examined to answer the following research questions: (1) does temporal variability exceed spatial variability? (2) If temporal variability exists, do all ponds (or groups of ponds) behave in a similar temporal pattern, linked to seasonal hydrologic drivers or precipitation events? Six shallow ponds located in the Hudson Bay Lowlands region were monitored between May and October 2015 (inclusive, spanning the entire open-water period). The ponds span a range of biophysical conditions including pond area, perimeter, depth, and shoreline development. Water samples were collected regularly, both bimonthly over the ice-free season and intensively during and following a large summer storm event. Samples were analysed for nitrogen speciation (NO 3 − , NH 4 + , dissolved organic nitrogen) and major ions (Cl − , SO 4 2− , K + , Ca 2+ , Mg 2+ , Na + ). Across all ponds, temporal variability (across the season and within a single rain event) exceeded spatial variability (variation among ponds) in concentrations of several major species (Cl − , SO 4 2− , K + , Ca 2+ , Na + ). Evapoconcentration and dilution of pond water with precipitation and runoff inputs were the dominant processes influencing a set of chemical species which are hydrologically driven (Cl − , Na + , K + , Mg 2+ , dissolved organic nitrogen), whereas the dissolved inorganic nitrogen species were likely mediated ... |
format |
Article in Journal/Newspaper |
author |
M. Q. Morison M. L. Macrae R. M. Petrone L. Fishback |
author_facet |
M. Q. Morison M. L. Macrae R. M. Petrone L. Fishback |
author_sort |
M. Q. Morison |
title |
Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds |
title_short |
Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds |
title_full |
Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds |
title_fullStr |
Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds |
title_full_unstemmed |
Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds |
title_sort |
capturing temporal and spatial variability in the chemistry of shallow permafrost ponds |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/bg-14-5471-2017 https://doaj.org/article/e8b08549f06a49eba956db78e49ad63f |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
genre |
Hudson Bay Ice permafrost Tundra |
genre_facet |
Hudson Bay Ice permafrost Tundra |
op_source |
Biogeosciences, Vol 14, Pp 5471-5485 (2017) |
op_relation |
https://www.biogeosciences.net/14/5471/2017/bg-14-5471-2017.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-14-5471-2017 1726-4170 1726-4189 https://doaj.org/article/e8b08549f06a49eba956db78e49ad63f |
op_doi |
https://doi.org/10.5194/bg-14-5471-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
23 |
container_start_page |
5471 |
op_container_end_page |
5485 |
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1766025778591432704 |