scholarly journals Tree line advance reduces mixing and oxygen concentrations in arctic‐alpine lakes through wind sheltering and organic carbon supply

2021 ◽  
Author(s):  
Marcus Klaus ◽  
Jan Karlsson ◽  
David Seekell
Keyword(s):  
Organic Carbon ◽  
Alpine Lakes ◽  
Tree Line ◽  
Carbon Supply ◽  
Wind Sheltering ◽  
Oxygen Concentrations

The vulnerability of Arctic shelf sediments to climate change

2015 ◽  
Vol 23 (4) ◽  
pp. 461-479 ◽  
Author(s):  
Robie W. Macdonald ◽  
Zou Zou A. Kuzyk ◽  
Sophia C. Johannessen
Keyword(s):  
Organic Carbon ◽  
Carbon Sources ◽  
The Arctic ◽  
Sedimentary Environments ◽  
Carbon Supply ◽  
Shelf Sediment ◽  
Wide Range ◽  
Metabolic Conditions ◽  
Shelf Sediments ◽  
Ocean Ecosystem

The sediments of the pan-Arctic shelves contribute an important component to the Arctic Ocean ecosystem by providing a habitat for biota (benthos), a repository for organic and inorganic non-conservative substances entering or produced within the ocean, a reactor and source of transformed substances back to the water column, and a mechanism of burial. Sediments interact with ice, ocean, and the surrounding land over a wide range of space and time scales. We discuss the vulnerability of shelf sediment to changes in (i) organic carbon sources, (ii) pathways of sediment and organic carbon supply, and (iii) physical and biogeochemical alteration (diagenesis). Sedimentary environments of the shelves and basins are likely to exhibit a wide variance in their response to global change because of their wide variation in sediment sources, processes, and metabolic conditions. In particular, the Chukchi and Barents shelves are dominated by inflowing waters from oceans to the south, whereas the interior shelves are more closely tied to terrigenous sources due to river inflow and coastal erosion.

Modeling dissolved organic carbon in subalpine and alpine lakes with GIS and remote sensing

2009 ◽  
Vol 24 (6) ◽  
pp. 807-816 ◽  
Author(s):  
Neil Winn ◽  
Craig E. Williamson ◽  
Robbyn Abbitt ◽  
Kevin Rose ◽  
William Renwick ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Alpine Lakes ◽  
Gis And Remote Sensing

scholarly journals Mineralization pathways in lake sediments with different oxygen and organic carbon supply

2009 ◽  
Vol 54 (2) ◽  
pp. 428-438 ◽  
Author(s):  
Martin Maerki ◽  
Beat Müller ◽  
Christian Dinkel ◽  
Bernhard Wehrli
Keyword(s):  
Organic Carbon ◽  
Lake Sediments ◽  
Carbon Supply

ORGANIC CARBON SUPPLY AND METABOLISM IN A SHALLOW GROUNDWATER ECOSYSTEM

Ecology ◽  
2000 ◽  
Vol 81 (11) ◽  
pp. 3133-3148 ◽  
Author(s):  
Michelle A. Baker ◽  
H. Maurice Valett ◽  
Clifford N. Dahm
Keyword(s):  
Organic Carbon ◽  
Shallow Groundwater ◽  
Carbon Supply

scholarly journals Reviews and syntheses: to the bottom of carbon processing at the seafloor

2018 ◽  
Vol 15 (2) ◽  
pp. 413-427 ◽  
Author(s):  
Jack J. Middelburg
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Secondary Production ◽  
Ecological Approach ◽  
Labile Organic Matter ◽  
Carbon Supply ◽  
Sediment Organic Carbon ◽  
Compositional Changes ◽  
Carbon Processing ◽  
Organic Resources

Abstract. Organic carbon processing at the seafloor is studied by biogeochemists to quantify burial and respiration, by organic geochemists to elucidate compositional changes and by ecologists to follow carbon transfers within food webs. Here I review these disciplinary approaches and discuss where they agree and disagree. It will be shown that the biogeochemical approach (ignoring the identity of organisms) and the ecological approach (focussing on growth and biomass of organisms) are consistent on longer timescales. Secondary production by microbes and animals is identified to potentially impact the composition of sedimentary organic matter. Animals impact sediment organic carbon processing by microbes in multiple ways: by governing organic carbon supply to sediments, by aeration via bio-irrigation and by mixing labile organic matter to deeper layers. I will present an inverted microbial loop in which microbes profit from bioturbation rather than animals profiting from microbial processing of otherwise lost dissolved organic resources. Sediments devoid of fauna therefore function differently and are less efficient in processing organic matter with the consequence that more organic matter is buried and transferred from Vernadsky's biosphere to the geosphere.

Response of sediment biofilm to increased dissolved organic carbon supply in groundwater artificially recharged with stormwater

2010 ◽  
Vol 11 (2) ◽  
pp. 382-393 ◽  
Author(s):  
Arnaud Foulquier ◽  
Florian Mermillod-Blondin ◽  
Florian Malard ◽  
Janine Gibert
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Supply ◽  
Sediment Biofilm

scholarly journals Lateral organic carbon supply to the deep Canada Basin

2008 ◽  
Vol 35 (11) ◽  
Author(s):  
Jeomshik Hwang ◽  
Timothy I. Eglinton ◽  
Richard A. Krishfield ◽  
Steven J. Manganini ◽  
Susumu Honjo
Keyword(s):  
Organic Carbon ◽  
Canada Basin ◽  
Carbon Supply
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