scholarly journals Where Does Wood Most Effectively Enhance Storage? Network-Scale Distribution of Sediment and Organic Matter Stored by Instream Wood

2018 ◽  
Vol 45 (1) ◽  
pp. 194-200 ◽  
Author(s):  
Andrew Pfeiffer ◽  
Ellen Wohl
Keyword(s):  
Organic Matter ◽  
Storage Network ◽  
Network Scale ◽  
Instream Wood

The contribution of instream wood to streambed organic matter controls on microbial metabolic activity

2021 ◽  
Author(s):  
Ben Howard ◽  
Sami Ullah ◽  
Nick Kettridge ◽  
Ian Baker ◽  
Stefan Krause
Keyword(s):  
Organic Matter ◽  
Metabolic Activity ◽  
Ghg Emissions ◽  
Catchment Management ◽  
Turnover Rates ◽  
Nutrient Turnover ◽  
Instream Wood ◽  
The Impact ◽  
Microbial Metabolic Activity

<p>Microbial metabolic activity (MMA) in streambeds drives greenhouse gas (GHG) production and nutrient turnover. Previous research has identified that the quantity and quality of organic matter (OM) are important controls on MMA. Instream wood may make a significant contribution to the total OM content of the streambed, especially in forested streams, but it has typically been ignored or explicitly omitted in previous research. By means of an incubation experiment, we investigate the impact of streambed wood on MMA, GHG production and nutrient turnover rates. By using three geologies (sandstone, chalk and limestone) and allowing temperatures to fluctuate with environmental conditions, we observe these impacts under a range of typical scenarios. These results could have implications for estimates of GHG emissions from streams and inform catchment management, for example the impacts of direct installation of instream wood in river restoration or the indirect input as a result of riparian planting.</p>

scholarly journals Vliv říčního dřeva na morfologické a sedimentologické parametry koryta na příkladu meandrujícího toku Odry

2019 ◽  
Vol 26 (1-2) ◽  
Author(s):  
Václav Gurkovský ◽  
Tomáš Galia
Keyword(s):  
Organic Matter ◽  
Coarse Grained ◽  
Grain Size Analysis ◽  
Natural Phenomenon ◽  
Size Analysis ◽  
Bed Sediments ◽  
Odra River ◽  
Instream Wood ◽  
Main Component ◽  
Pool Formation

Instream wood is a natural phenomenon that signifi cantly influences a function of the fluvial system in forested river basins and represents a natural part of this system. However, the majority of these relatios between instream wood and fluvial ecosystems were investigated in mountain streams or gravel-bed rivers and we are lacking field data from lowland meandering rivers. This study deals with the complex assessment of instream wood on morphology and sediment parameters including the content of organic material at spatially detailed scale of the selected bend of the Odra River. Within the site of interest (66.5 river km), 12 instream wood pieces were identified (lenght ≥ 1 m, diameter ≥ 10 cm). Their presence significantly affected river morphology, when they were the main initiator of pool formation. In total, 28 samples of surface bed sediments were collected from the thalweg, bars and lateral pool. In laboratory, samples were subjected to grain size analysis (sieving method) and loss on ignition (LOI) to obtain content of organic matter. The majority of bed sediment samples were coarse grained and these samples were located in the thalweg. The main component of these samples is gravel, often supplemented with admixtures of finer fractions. The analysis of data did not show the effect of instream wood on the deposition of organic matter in bed sediments. One of the reasons may be the presence of coarse grained material which generally contains a small amount of organic matter.

scholarly journals Reactivity, fate and functional roles of dissolved organic matter in anoxic inland waters

2020 ◽  
Vol 16 (2) ◽  
pp. 20190694 ◽  
Author(s):  
Maximilian P. Lau ◽  
Paul del Giorgio
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Inland Waters ◽  
Aquatic Environments ◽  
Anoxic Conditions ◽  
Functional Roles ◽  
Network Scale ◽  
Aquatic Compartment ◽  
Global Cycle

The transit of organic matter (OM) through the aquatic compartment of its global cycle has been intensively studied, traditionally with a focus on the processing and degradation of its dissolved fraction (dissolved organic matter, DOM). Because this is so intimately related to oxidation, the notion tenaciously persists that where oxygen is absent, DOM turnover is markedly slowed. In this Opinion Piece, we outline how diverse processes shape, transform and degrade DOM also in anoxic aquatic environments, and we focus here on inland waters as a particular case study. A suite of biogeochemical DOM functions that have received comparatively little attention may only be expressed in anoxic conditions and may result in enhanced biogeochemical roles of these deoxygenated habitats on a network scale.

Sign in / Sign up

Export Citation Format

Share Document