Riverine coupling of biogeochemical cycles between land, oceans, and atmosphere

Streams, rivers, lakes, and other inland waters are important agents in the coupling of biogeochemical cycles between continents, atmosphere, and oceans. The depiction of these roles in global-scale assessments of carbon (C) and other bioactive elements remains limited, yet recent findings suggest t...

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Vydáno v:Frontiers in ecology and the environment Ročník 9; číslo 1; s. 53 - 60
Hlavní autoři: Aufdenkampe, Anthony K, Mayorga, Emilio, Raymond, Peter A, Melack, John M, Doney, Scott C, Alin, Simone R, Aalto, Rolf E, Yoo, Kyungsoo
Médium: Journal Article
Jazyk:angličtina
Vydáno: Ecological Society of America 01.02.2011
Témata:
Biogeochemical cycles
biological production
buffering capacity
calcium carbonate
carbon
Carbon dioxide
coasts
estuaries
floodplains
Freshwater ecosystems
humans
Inland waters
lakes
leaching
Lotic systems
Marine ecosystems
Oceans
REVIEWS
rivers
soil respiration
Streams
Terrestrial ecosystems
weathering
Wetlands
ISSN:1540-9295, 1540-9309
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Shrnutí:Streams, rivers, lakes, and other inland waters are important agents in the coupling of biogeochemical cycles between continents, atmosphere, and oceans. The depiction of these roles in global-scale assessments of carbon (C) and other bioactive elements remains limited, yet recent findings suggest that C discharged to the oceans is only a fraction of that entering rivers from terrestrial ecosystems via soil respiration, leaching, chemical weathering, and physical erosion. Most of this C influx is returned to the atmosphere from inland waters as carbon dioxide (CO 2 ) or buried in sedimentary deposits within impoundments, lakes, floodplains, and other wetlands. Carbon and mineral cycles are coupled by both erosion-–deposition processes and chemical weathering, with the latter producing dissolved inorganic C and carbonate buffering capacity that strongly modulate downstream pH, biological production of calcium-carbonate shells, and CO 2 outgassing in rivers, estuaries, and coastal zones. Human activities substantially affect all of these processes.
Bibliografie:ObjectType-Article-1
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ISSN:1540-9295
1540-9309
DOI:10.1890/100014