The role of large wood in retaining fine sediment, organic matter and plant propagules in a small, single-thread forest river

Osei, Nana A.; Gurnell, Angela M.; Harvey, Gemma L.

doi:10.1016/j.geomorph.2015.01.031

Cited by 51 publications

(44 citation statements)

References 68 publications

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“…Complex feedbacks exist between wood, living trees and other riparian and aquatic plants. Seeds and living wood pieces transported by flowing water are retained in and around wood accumulations, creating local regeneration niches for riparian vegetation (Steiger et al ., ; Pettit and Naiman, ; Osei et al ., ) and biogeochemical hotspots for microbial activity (Krause et al ., ). Dead and living wood incorporated into the floodplain (e.g.…”

Section: Discussionmentioning

confidence: 99%

The current state of the use of large wood in river restoration and management

Grabowski

Gurnell

Burgess‐Gamble

et al. 2019

Water & Environment J

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Trees fall naturally into rivers generating flow heterogeneity, inducing geomorphological features, and creating habitats for biota. Wood is increasingly used in restoration projects and the potential of wood acting as leaky barriers to deliver natural flood management by 'slowing the flow' is recognised. However, wood in rivers can pose a risk to infrastructure and locally increase flood hazards. The aim of this paper is to provide an up-to-date summary of the benefits and risks associated with using wood to promote geomorphological processes to restore and manage rivers. This summary was developed through a workshop that brought together academics, river managers, restoration practitioners and consultants in the UK to share science and best practice on wood in rivers. A consensus was developed on four key issues: (i) hydrogeomorphological effects, (ii) current use in restoration and management, (iii) uncertainties and risks and (iv) tools and guidance required to inform process-based restoration and management.

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Section: Discussionmentioning

confidence: 99%

The current state of the use of large wood in river restoration and management

Grabowski

Gurnell

Burgess‐Gamble

et al. 2019

Water & Environment J

Self Cite

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“…Výsledky bezmála padesátiletého výzkumu zaměřeného na dřevní hmotu v říčních korytech nám poskytují základní informace o tom, jak se dřevo do vodního toku dostává (Piégay et al 1999), jak je v něm transportováno (Curran 2010), jak může dřevo ovlivňovat hydrauliku (Curran, Wohl 2003), korytovou morfologii (Kail 2003;Magilligan et al 2008), ale také sedimentologické parametry (Máčka, Krejčí 2010a;Osei et al 2015), množství organické hmoty v sedimentech (Bilby, Ward 1991;Daniels 2006;Wohl, Scott 2017) či diverzitu organismů vázaných na vodní nebo břehové prostředí (Fausch, Northcote 1992). Ačkoli se můžeme opřít o dostatek relevantních zdrojů, stále se objevují mezery především ve schopnosti kvantitativně předpovídat vzájemné působení mezi dřevní hmotou a směrem proudění, chodem sedimentů nebo vodní biotou (Wohl 2017).…”

Section: úVodunclassified

“…Předpokládali jsme, že stejně jako u koryt s vyšším gradientem bude mít říční dřevo vliv na jeho morfologické a sedimentologické parametry. Dále jsme chtěli ověřit, že v místech výskytu říčního dřeva budou pozorovány hodnoty s vyšším obsahem hrubé a jemné partikulované organické hmoty, což bylo dříve deklarováno v případě nížinného meandrujícího toku o malé ploše povodí ~50 km 2 (Daniels 2006) a rovněž nížinného potoka s variabilním podílem štěrkové frakce (Osei et al 2015).…”

Section: úVodunclassified

“…V lokalitě se nachází převážně hrubozrnný substrát, což nepředstavuje ideální matrici k zachycení partikulované organické hmoty vzhledem k aerobnímu prostředí. Tuto druhou hypotézu podporují předchozí výzkumy vlivu nápěchů říčního dřeva na ukládání partikulované organické hmoty v závislosti na zrnitosti korytových sedimentů, kdy byl zjištěn signifikantně nižší obsah organické hmoty u úseku nížinného potoka s převažujícím štěrkovým substrátem v porovnání s úseky s dominantními jemnějšími frakcemi (Osei et al 2015).…”

Section: Diskuze a Závěrunclassified

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

Gurkovský¹,

Galia²

2019

Geologické výzkumy

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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.

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“…Of all papers published between 1997 and 2017, about 33% related to nutrients and water quality (Table S54). Within this body of work, the largest number of publications (20%) explored non-point source (NPS) pollution and its effect on water quality within riparian zones (Nisbet, 2001;Jarvie et al, 2008;Hutchins et al, 2010;Wilkinson et al, 2014); particularly, phosphorus and sediments (Steiger et al, 2001;Roberts et al, 2013;Osei et al, 2015;McCall et al, 2017;Vinten et al, 2017). This focus of attention responds principally to the need to meet environmental standards imposed by the WFD that requires good ecological and chemical status and drinking water standards without increasing the costs of treatment that have to be paid by consumers (Kay et al, 2009).…”

Section: "Nutrients and Water Quality" Publicationsmentioning

confidence: 99%

Riparian research and legislation, are they working towards the same common goals? A UK case study

Sosa

Williams

Orr

et al. 2018

Environmental Science & Policy

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The value of riparian areas has long been recognised due to their contribution in supporting wildlife diversity and their capacity to deliver a wide range of ecosystem services. Their multiple uses (e.g. flood prevention, biodiversity, pollutant attenuation) combined with an inconsistent use of terminology (e.g. river bank, floodplain, wetland, buffer strip), however, has led to the development of fragmented policies associated with riparian areas. This review brings together current EU and UK legislation alongside research publications focused on riparian areas. We critically evaluate the current legislative framework relating to riparian areas and identify key scientific knowledge gaps which need to be addressed to support future decision-making. Our findings revealed several major problems associated with riparian policy and management, including: (i) the fragmented nature of legislation concerning riparian areas; (ii) the presence of redundant policy instruments, (iii) a lack of practical objectives, (iv) contradictory measures, and (v) unachievable targets. Further, our results suggest that most research is focused on agricultural systems and single ecosystem attributes or functions, rather than supporting an ecosystem-service approach that is widely aspired to in policy statements. We recommend that future research could better support riparian protection policies by focusing less on what the different ecosystems 'are', and more on what they can 'offer' by way of multiple benefits.

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The role of large wood in retaining fine sediment, organic matter and plant propagules in a small, single-thread forest river

Cited by 51 publications

References 68 publications

The current state of the use of large wood in river restoration and management

The current state of the use of large wood in river restoration and management

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

Riparian research and legislation, are they working towards the same common goals? A UK case study

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