Synchrony in catchment stream colour levels is driven by both local and regional climate
Streams draining upland catchments carry large quantities of carbon from terrestrial stocks to downstream freshwater and marine ecosystems. Here it either enters long-term storage in sediments or enters the atmosphere as gaseous carbon through a combination of biotic and abiotic processes. There are...
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ftdoajarticles:oai:doaj.org/article:96be46e352ad44d5a6802b178697dada 2023-05-15T17:35:46+02:00 Synchrony in catchment stream colour levels is driven by both local and regional climate B. C. Doyle E. de Eyto M. Dillane R. Poole V. McCarthy E. Ryder E. Jennings 2019-03-01T00:00:00Z https://doi.org/10.5194/bg-16-1053-2019 https://doaj.org/article/96be46e352ad44d5a6802b178697dada EN eng Copernicus Publications https://www.biogeosciences.net/16/1053/2019/bg-16-1053-2019.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-16-1053-2019 1726-4170 1726-4189 https://doaj.org/article/96be46e352ad44d5a6802b178697dada Biogeosciences, Vol 16, Pp 1053-1071 (2019) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/bg-16-1053-2019 2022-12-31T11:50:15Z Streams draining upland catchments carry large quantities of carbon from terrestrial stocks to downstream freshwater and marine ecosystems. Here it either enters long-term storage in sediments or enters the atmosphere as gaseous carbon through a combination of biotic and abiotic processes. There are, however, increasing concerns over the long-term stability of terrestrial carbon stores in blanket peatland catchments as a result of anthropogenic pressures and climate change. We analysed sub-annual and inter-annual changes in river water colour (a reliable proxy measurement of dissolved organic carbon; DOC) using 6 years of weekly data, from 2011 to 2016. This time-series dataset was gathered from three contiguous river sub-catchments, the Black, the Glenamong and the Srahrevagh, in a blanket peatland catchment system in western Ireland, and it was used to identify the drivers that best explained observed temporal change in river colour. The data were also used to estimate annual DOC loads from each catchment. General additive mixed modelling was used to identify the principle environmental drivers of water colour in the rivers, while wavelet cross-correlation analysis was used to identify common frequencies in correlations. At 130 mg Pt Co L −1 , the mean colour levels in the Srahrevagh (the sub-catchment with lowest rainfall and higher forest cover) were almost 50 % higher than those from the Black and Glenamong, at 95 and 84 mg Pt Co L −1 respectively. The decomposition of the colour datasets revealed similar multi-annual, annual and event-based (random component) trends, illustrating that environmental drivers operated synchronously at each of these temporal scales. For both the Black and its nested Srahrevagh catchment, three variables (soil temperature, soil moisture deficit, SMD, and the weekly North Atlantic Oscillation, NAO) combined to explain 54 % and 58 % of the deviance in colour respectively. In the Glenamong, which had steeper topography and a higher percentage of peat intersected by streams, soil ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Biogeosciences 16 5 1053 1071 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 B. C. Doyle E. de Eyto M. Dillane R. Poole V. McCarthy E. Ryder E. Jennings Synchrony in catchment stream colour levels is driven by both local and regional climate |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Streams draining upland catchments carry large quantities of carbon from terrestrial stocks to downstream freshwater and marine ecosystems. Here it either enters long-term storage in sediments or enters the atmosphere as gaseous carbon through a combination of biotic and abiotic processes. There are, however, increasing concerns over the long-term stability of terrestrial carbon stores in blanket peatland catchments as a result of anthropogenic pressures and climate change. We analysed sub-annual and inter-annual changes in river water colour (a reliable proxy measurement of dissolved organic carbon; DOC) using 6 years of weekly data, from 2011 to 2016. This time-series dataset was gathered from three contiguous river sub-catchments, the Black, the Glenamong and the Srahrevagh, in a blanket peatland catchment system in western Ireland, and it was used to identify the drivers that best explained observed temporal change in river colour. The data were also used to estimate annual DOC loads from each catchment. General additive mixed modelling was used to identify the principle environmental drivers of water colour in the rivers, while wavelet cross-correlation analysis was used to identify common frequencies in correlations. At 130 mg Pt Co L −1 , the mean colour levels in the Srahrevagh (the sub-catchment with lowest rainfall and higher forest cover) were almost 50 % higher than those from the Black and Glenamong, at 95 and 84 mg Pt Co L −1 respectively. The decomposition of the colour datasets revealed similar multi-annual, annual and event-based (random component) trends, illustrating that environmental drivers operated synchronously at each of these temporal scales. For both the Black and its nested Srahrevagh catchment, three variables (soil temperature, soil moisture deficit, SMD, and the weekly North Atlantic Oscillation, NAO) combined to explain 54 % and 58 % of the deviance in colour respectively. In the Glenamong, which had steeper topography and a higher percentage of peat intersected by streams, soil ... |
format |
Article in Journal/Newspaper |
author |
B. C. Doyle E. de Eyto M. Dillane R. Poole V. McCarthy E. Ryder E. Jennings |
author_facet |
B. C. Doyle E. de Eyto M. Dillane R. Poole V. McCarthy E. Ryder E. Jennings |
author_sort |
B. C. Doyle |
title |
Synchrony in catchment stream colour levels is driven by both local and regional climate |
title_short |
Synchrony in catchment stream colour levels is driven by both local and regional climate |
title_full |
Synchrony in catchment stream colour levels is driven by both local and regional climate |
title_fullStr |
Synchrony in catchment stream colour levels is driven by both local and regional climate |
title_full_unstemmed |
Synchrony in catchment stream colour levels is driven by both local and regional climate |
title_sort |
synchrony in catchment stream colour levels is driven by both local and regional climate |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/bg-16-1053-2019 https://doaj.org/article/96be46e352ad44d5a6802b178697dada |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Biogeosciences, Vol 16, Pp 1053-1071 (2019) |
op_relation |
https://www.biogeosciences.net/16/1053/2019/bg-16-1053-2019.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-16-1053-2019 1726-4170 1726-4189 https://doaj.org/article/96be46e352ad44d5a6802b178697dada |
op_doi |
https://doi.org/10.5194/bg-16-1053-2019 |
container_title |
Biogeosciences |
container_volume |
16 |
container_issue |
5 |
container_start_page |
1053 |
op_container_end_page |
1071 |
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1766135027677003776 |