Small Rivers Behave Like Large Rivers: Effects of Postglacial History on Plant Species Richness Along Riverbanks

Grelsson, Gunnel; Dynesius, Mats; Johansson, Mats; Sperens, Ulf

doi:10.2307/2845689

Cited by 48 publications

(40 citation statements)

References 32 publications

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“…River regulation and channelization lead to a shift in species composition (Baart et al, 2013) and to a decrease in species numbers (Franklin et al, 2001;Jansson et al, 2000;Nilsson et al, 1991;Uowolo et al, 2005). This decrease in species richness has been studied frequently and is valid across continents (Dynesius et al, 2004).…”

Section: Introductionmentioning

confidence: 97%

Human impact on plant biodiversity in functional floodplains of heavily modified rivers – A comparative study along German Federal Waterways

Harvolk

Symmank

Sundermeier

et al. 2015

Ecological Engineering

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Section: Introductionmentioning

confidence: 97%

Human impact on plant biodiversity in functional floodplains of heavily modified rivers – A comparative study along German Federal Waterways

Harvolk

Symmank

Sundermeier

et al. 2015

Ecological Engineering

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“…Soil moisture is often not a limiting factor for peat formation in the sedimentary parts as groundwater levels are similarly close to the ground surface as for till sites, which suggests that varying hydraulic properties of the substrate are probably not a sufficient explanation. Other potential factors that might substantially influence riparian peat formation and, subsequently, riparian soil water TOC concentrations include differing substrate erodibility or ionic composition of soil-or groundwater (Almendinger and Leete, 1998;Nilsson et al, 1991;Giesler et al, 1998). One additional ROK site (R13, not shown on map) was destroyed after being buried under sediments from a fourth order stream during spring flood 2008.…”

Section: Hydrometric Observations and Soil Water Toc Concentrationsmentioning

confidence: 99%

Riparian zone hydrology and soil water total organic carbon (TOC): implications for spatial variability and upscaling of lateral riparian TOC exports

et al. 2012

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Abstract. Groundwater flowing from hillslopes through riparian (near-stream) soils often undergoes chemical transformations that can substantially influence stream water chemistry. We used landscape analysis to predict total organic carbon (TOC) concentration profiles and groundwater levels measured in the riparian zone (RZ) of a 67 km 2 catchment in Sweden. TOC exported laterally from 13 riparian soil profiles was then estimated based on the riparian flow-concentration integration model (RIM). Much of the observed spatial variability of riparian TOC concentrations in this system could be predicted from groundwater levels and the topographic wetness index (TWI). Organic riparian peat soils in forested areas emerged as hotspots exporting large amounts of TOC. These TOC fluxes were subject to considerable temporal variations caused by a combination of variable flow conditions and changing soil water TOC concentrations. Mineral riparian gley soils, on the other hand, were related to rather small TOC export rates and were characterized by relatively time-invariant TOC concentration profiles. Organic and mineral soils in RZs constitute a heterogeneous landscape mosaic that potentially controls much of the spatial variability of stream water TOC. We developed an empirical regression model based on the TWI to move beyond the plot scale and to predict spatially variable riparian TOC concentration profiles for RZs underlain by glacial till.

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“…Studies have shown that there is a correlation between the diversity of habitats and the diversity of species along different stretches of the same river (e.g. Nilsson et al, 1991a;Cordes et al, 1997). The most heterogeneous sectors of a river are those which experience flooding disturbance of sufficient magnitude and frequency that the turnover rates of floodplain sediments ensure the creation of new habitats for regeneration; these turnover rates are very different in rivers of different bioclimatic zones (Hughes, 1997), and depend on the position of the floodplain in the landscape.…”

Section: Processes At the Reach Scalementioning

confidence: 99%

The importance of different scale processes for the restoration of floodplain woodlands

Hughes

Adams

Muller

et al. 2001

Regul. Rivers: Res. Mgmt.

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The restoration of floodplain woodlands demands an understanding of the linkages between process, form and past management history at both a local and catchment scale. Site and reach scale processes that influence the species composition of floodplain woodland species are described with a particular focus on the relationships between hydrological and sediment inputs to floodplains and the regeneration response by tree species. The importance of integrating natural science knowledge gained at the site reach scale with decisions taken at the catchment scale on water allocation priorities is then discussed.Research was carried out on the River O 8 re in Sweden, The River Ouse in the United Kingdom and the River Isère and River Garonne in France. Research results at the site and reach scale allow broad definition of ideal conditions for the regeneration and growth of floodplain tree species and the flows that provide them: (1) channel movement has to occur for the creation of sedimentation sites required for the regeneration of early successional species and the flows that provide them; (2) flooding events should occur periodically to cause both channel movement and recharge floodplain water tables; (3) water table decline rates following a flood event must be slow enough that seedling roots can maintain contact with the retreating water front; (4) unseasonal flood events can cause high mortality of seedlings and prevent successful regeneration in any season. Some of the requirements for the restoration of floodplain woodlands can be delivered through site and reach scale restoration projects with reasonably predictable ecological outcomes. A more holistic approach to the provision of regeneration sites for floodplain woodlands would also include water allocation decisions targeted at providing flow conditions which could restore geomorphological processes. However, it is difficult to predict ecosystem responses to catchment scale flow allocation measures and, therefore, in the intensively managed river corridors of Western Europe, river restoration initiatives tend to be restricted to the site and reach scale.

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Small Rivers Behave Like Large Rivers: Effects of Postglacial History on Plant Species Richness Along Riverbanks

Cited by 48 publications

References 32 publications

Human impact on plant biodiversity in functional floodplains of heavily modified rivers – A comparative study along German Federal Waterways

Human impact on plant biodiversity in functional floodplains of heavily modified rivers – A comparative study along German Federal Waterways

Riparian zone hydrology and soil water total organic carbon (TOC): implications for spatial variability and upscaling of lateral riparian TOC exports

The importance of different scale processes for the restoration of floodplain woodlands

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