NDLI: Transformations in DOC along a source to sea continuum; impacts of photo-degradation, biological processes and mixing

Content Provider	Springer Nature Link
Author	Jones, Timothy G. Evans, Chris D. Jones, Davey L. Hill, Paul W. Freeman, Chris
Copyright Year	2015
Abstract	Peatlands export significant amounts of dissolved organic carbon (DOC) to freshwaters, but the quantity of DOC reaching marine environments is typically less than the input to the fluvial system due to processing within the water column. Key removal processes include photo-chemical degradation, and heterotrophic bacterial respiration. In this study we examined these processes using 14C-labelled DOC to quantify the extent of DOC breakdown and to determine its fate following irradiation under controlled laboratory conditions. We examined the influence of microbial processes occurring within the water column, the potential role of stream-bed biofilms, and the possible modifying effects of downstream mixing, as DOC in water from the peatland encounters runoff from upland mineral soils (“Mountain”), nutrient-rich runoff from agricultural soils, and seawater in an estuary. Our results demonstrated conservative mixing of DOC from Peatland and Mountain waters but interactive effects when Peatland water was mixed with Agricultural and Estuary waters and exposed to solar radiation. The mixing of Peatland and Agricultural waters led to net DOC production, suggesting that DOC was only partially degraded by solar radiation and that the products of this might have fuelled autotrophic microbial growth in the samples. The mixing of Peatland water with saline estuary water resulted in net DOC loss following irradiation, suggesting a role for sunlight in enhancing the flocculation of DOC to particulate organic carbon (POC) in saline environments.
Starting Page	433
Ending Page	446
Page Count	14
File Format	PDF
ISSN	10151621
Journal	Aquatic Sciences
Volume Number	78
Issue Number	3
e-ISSN	14209055
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-12-21
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biodegradation Carbon cycling Dissolved organic matter Humic substances UV radiation Freshwater & Marine Ecology Marine & Freshwater Sciences Oceanography Ecology Life Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Water Science and Technology Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Higher reactivity of allochthonous vs. autochthonous DOC sources in a shallow lake

Sporadic hotspots for physico-chemical retention of aquatic organic carbon: from peatland headwater source to sea

The satellite reversion of dissolved organic carbon (DOC) based on the analysis of the mixing behavior of DOC and colored dissolved organic matter: the East China Sea as an example

Reactivity of dissolved organic matter in response to acid deposition

Biological availability and humic properties of dissolved organic carbon in Lake Balaton (Hungary)

Photochemical degradation of dissolved organic matter from streams in the western Lake Superior watershed

Processing of humic-rich riverine dissolved organic matter by estuarine bacteria: effects of predegradation and inorganic nutrients

Photo-oxidation processes, properties of DOC, reactive oxygen species (ROS), and their potential impacts on native biota and carbon cycling in the Rio Negro (Amazonia, Brazil)

Carbon distribution and fluxes of 16 rivers discharging into the Bohai Sea in summer

Transformations in DOC along a source to sea continuum; impacts of photo-degradation, biological processes and mixing

Similar Documents

Higher reactivity of allochthonous vs. autochthonous DOC sources in a shallow lake

Sporadic hotspots for physico-chemical retention of aquatic organic carbon: from peatland headwater source to sea

The satellite reversion of dissolved organic carbon (DOC) based on the analysis of the mixing behavior of DOC and colored dissolved organic matter: the East China Sea as an example

Reactivity of dissolved organic matter in response to acid deposition

Biological availability and humic properties of dissolved organic carbon in Lake Balaton (Hungary)

Photochemical degradation of dissolved organic matter from streams in the western Lake Superior watershed

Processing of humic-rich riverine dissolved organic matter by estuarine bacteria: effects of predegradation and inorganic nutrients

Photo-oxidation processes, properties of DOC, reactive oxygen species (ROS), and their potential impacts on native biota and carbon cycling in the Rio Negro (Amazonia, Brazil)

Carbon distribution and fluxes of 16 rivers discharging into the Bohai Sea in summer

Transformations in DOC along a source to sea continuum; impacts of photo-degradation, biological processes and mixing