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| Titel |
The significance of organic carbon and nutrient export from peatland-dominated landscapes subject to disturbance, a stoichiometric perspective |
| VerfasserIn |
S. Waldron, H. Flowers, C. Arlaud, C. Bryant, S. McFarlane |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 3 ; Nr. 6, no. 3 (2009-03-13), S.363-374 |
| Datensatznummer |
250003531
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| Publikation (Nr.) |
 copernicus.org/bg-6-363-2009.pdf |
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| Zusammenfassung |
| The terrestrial-aquatic interface is a crucial environment in which to
consider the fate of exported terrestrial carbon in the aquatic system. Here
the fate of dissolved organic carbon (DOC) may be controlled by nutrient
availability. However, peat-dominated headwater catchments are normally of
low nutrient status and thus there is little data on how DOC and nutrient
export co-varies. We present nutrient and DOC data for two UK catchments
dominated by peat headwaters. One, Whitelee, is undergoing development for
Europe's largest windfarm. Glen Dye by comparison is relatively undisturbed.
At both sites there are significant linear relationships between DOC and
soluble reactive phosphorus and nitrate concentrations in the drainage
waters. However, inter-catchment differences exist. Changes in the pattern
of nutrient and carbon export at Whitelee reveal that landscape disturbance
associated with windfarm development impacts the receiving waters, and that
nutrient export does not increase in a stoichiometric manner that will
promote increase in microbial biomass but rather supports aquatic
respiration. In turn greater CO2 efflux may prevail. Hence disturbance
of terrestrial carbon stores may impact the both the aquatic and gaseous
carbon cycle. We suggest estimates of aquatic carbon export should inform
the decision-making process prior to development in ecosystems and
catchments with high terrestrial carbon storage. |
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