Greenhouse gas dynamics in river networks fragmented by drying and damming

River fragmentation by drying and damming is occurring more frequently in the Anthropocene era, yet there is limited knowledge of how this fragmentation influences greenhouse gas (GHG) fluxes in river networks. River networks have the potential to be important sources of GHGs to the atmosphere throu...

Full description

Saved in:
Bibliographic Details
Published in:Freshwater biology Vol. 68; no. 12; pp. 2027 - 2041
Main Authors: Silverthorn, Teresa, López‐Rojo, Naiara, Foulquier, Arnaud, Chanudet, Vincent, Datry, Thibault
Format: Journal Article
Language:English
Published: Oxford Wiley Subscription Services, Inc 01.12.2023
Wiley
Subjects:
Anthropocene
Anthropocene epoch
Arid climates
Carbon dioxide
Chlorophyll
Chlorophylls
Climate change
Climate change mitigation
Dissolved oxygen
Drying
Ecology, environment
Fluxes
Fragmentation
Gas dynamics
Greenhouse gases
Life Sciences
limnology
Literature reviews
Mitigation
Networks
Nitrous oxide
Organic matter
oxygen
Phytoplankton
River networks
Rivers
sediments
Spatial distribution
texture
Water temperature
Reservoir
Regulation
Catchment
Intermittent
Fragmentation
ISSN:0046-5070, 1365-2427
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:River fragmentation by drying and damming is occurring more frequently in the Anthropocene era, yet there is limited knowledge of how this fragmentation influences greenhouse gas (GHG) fluxes in river networks. River networks have the potential to be important sources of GHGs to the atmosphere through both similar and dissimilar mechanisms associated with temporary (drying) and permanent (damming) fragmentation. We conducted a review of the literature and found 49, 43 and six studies about GHGs (CO 2 , CH 4 and N 2 O) in rivers impacted by damming, drying and their interaction, respectively. We found research lacking in non‐arid climates and in small water‐retention structures for studies regarding drying and damming, respectively. The major factors directly influencing GHG fluxes in river networks impacted by drying were sediment moisture, temperature, organic matter content and texture. In networks impacted by damming, the most influential factors were water temperature, dissolved oxygen, and phytoplankton Chlorophyll‐ a . Based on our literature review and meta‐ecosystem theory, we propose that the spatial distribution of fragmentation strongly influences GHG fluxes at the river‐network scale. The actionable future research directions identified here will help to improve our understanding of the effects of fragmentation by drying and damming on GHG fluxes, with the potential to inform river management and climate change mitigation strategies.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:0046-5070
1365-2427
DOI:10.1111/fwb.14172