Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams

Erhagen, Björn ; Berggren, Martin LU ; Sponseller, Ryan A. ; Panneer Selvam, Balathandayuthabani LU and Giesler, Reiner (2015) ASLO 2015 Aquatic Sciences Meeting
Abstract
An important component of the carbon cycle is the lateral flow of dissolved organic carbon (DOC) from terrestrial ecosystems to streams and rivers. The fate of this carbon depends very much on the bioavailability of DOC (BDOC), which may determine whether DOC is returned to the atmosphere as CO2 or deposited in sediments. This study focuses on the linkages between stream DOC composition, optical characteristics and bioavailability along vegetation gradients in subarctic Sweden. We sampled streams from tundra, birch forest, and boreal forest ecoregions, which encompass large differences in C:N ratios (6.4-30.1) and spectroscopic characteristics, all related to variation in landscape properties. The DOC bioavailability was determined through... (More)
An important component of the carbon cycle is the lateral flow of dissolved organic carbon (DOC) from terrestrial ecosystems to streams and rivers. The fate of this carbon depends very much on the bioavailability of DOC (BDOC), which may determine whether DOC is returned to the atmosphere as CO2 or deposited in sediments. This study focuses on the linkages between stream DOC composition, optical characteristics and bioavailability along vegetation gradients in subarctic Sweden. We sampled streams from tundra, birch forest, and boreal forest ecoregions, which encompass large differences in C:N ratios (6.4-30.1) and spectroscopic characteristics, all related to variation in landscape properties. The DOC bioavailability was determined through laboratory bioassays carried out twice during the year (spring-flood and base flow). During spring flood, DOC concentration varied between 0.5 - 6.7 mg L-1 and the BDOC ranged between 3- 24 %, with the highest BDOC from birch forest/tundra and tundra streams. Results suggest that broad-scale transitions in vegetation structure across sub-arctic landscapes have important implications for the quantity and quality of DOC delivered to aquatic ecosystems. (Less)
Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to conference
publication status
published
subject
pages
1 pages
conference name
ASLO 2015 Aquatic Sciences Meeting
conference location
Granada, Spain
conference dates
2015-02-22 - 2015-12-27
language
English
LU publication?
yes
id
8522fb18-9c80-4a30-b63a-f7de2d391db2
date added to LUP
2018-07-05 15:52:58
date last changed
2018-11-21 21:40:39
@misc{8522fb18-9c80-4a30-b63a-f7de2d391db2,
  abstract     = {{An important component of the carbon cycle is the lateral flow of dissolved organic carbon (DOC) from terrestrial ecosystems to streams and rivers. The fate of this carbon depends very much on the bioavailability of DOC (BDOC), which may determine whether DOC is returned to the atmosphere as CO2 or deposited in sediments. This study focuses on the linkages between stream DOC composition, optical characteristics and bioavailability along vegetation gradients in subarctic Sweden. We sampled streams from tundra, birch forest, and boreal forest ecoregions, which encompass large differences in C:N ratios (6.4-30.1) and spectroscopic characteristics, all related to variation in landscape properties. The DOC bioavailability was determined through laboratory bioassays carried out twice during the year (spring-flood and base flow). During spring flood, DOC concentration varied between 0.5 - 6.7 mg L-1 and the BDOC ranged between 3- 24 %, with the highest BDOC from birch forest/tundra and tundra streams. Results suggest that broad-scale transitions in vegetation structure across sub-arctic landscapes have important implications for the quantity and quality of DOC delivered to aquatic ecosystems.}},
  author       = {{Erhagen, Björn and Berggren, Martin and Sponseller, Ryan A. and Panneer Selvam, Balathandayuthabani and Giesler, Reiner}},
  language     = {{eng}},
  title        = {{Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams}},
  year         = {{2015}},
}