Fragmentation of Riparian Floras in Rivers With Multiple Dams

Jansson, Roland; Nilsson, Christer; Renöfält, Birgitta Malm

doi:10.1890/0012-9658(2000)081[0899:forfir]2.0.co;2

Cited by 176 publications

(98 citation statements)

References 19 publications

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“…The reservoirs created by dams can trap sediment and seeds, affecting the ability of seeds to disperse downstream, thus fragmenting the biological connectivity of riparian zones (Jansson et al 2000). For example, Merritt and Wohl (2006) found that dams reduced seed concentration in the water column by 70-94% on two rivers in the southern Rocky Mountains of Colorado.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Glines Canyon Dam on Hydrochorous Seed Dispersal in the Elwha River

Chenoweth

2008

Northwest Science

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Section: Introductionmentioning

confidence: 99%

The Effect of Glines Canyon Dam on Hydrochorous Seed Dispersal in the Elwha River

Chenoweth

2008

Northwest Science

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“…Dams, culverts, and waterfalls (Magnuson 1978;Holmquist et al 1998;Jansson et al 2000), as well as riffles during periods of low water (Power et al 1985, Covich et al 1996 physically block within-stream movements. Biotic conditions of the stream, such as the presence of predators or competitors, limit movers (Bradford et al 1993;Covich et al 1996;García-Ramos et al 2000), as do physical factors, including water velocity, nutrient levels (Dent & Grimm 1999), temperature, dissolved oxygen, and water levels.…”

Section: Within-stream Boundaries and Corridorsmentioning

confidence: 99%

“…These transformations have disrupted natural flows that formerly occurred within ecosystems, communities, and populations (Harris & Scheck 1991) and have created new ones (Bennett 1991). Forests have been subdivided into isolated woodlots set in a matrix of agricultural land (Burgess & Sharpe 1981), rivers have been blocked by hydroelectric dams (Magnuson 1978;Holmquist et al 1998;Jansson et al 2000), and canal systems link previously isolated waterways (Mills et al 1993). Even in national parks and other protected areas, high-use trails and roads connect the exterior and interior portions of many remaining forests (Benninger-Truax et al 1992;Tyser & Worley 1992;Parendes & Jones 2000;Trombulak & Frissel 2000).…”

Section: Introductionmentioning

confidence: 99%

Boundaries and Corridors as a Continuum of Ecological Flow Control: Lessons from Rivers and Streams

Puth

Wilson

2001

Conservation Biology

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Landscape boundaries and corridors are areas of small spatial extent relative to their large effects on ecological flows. The trend in ecological literature is to treat corridors and boundaries as separate phenomena on the landscape. This approach, however, misses a fundamental aspect they have in common: their strong influence on ecological flows. Corridors and boundaries exist at opposite ends of a permeability gradient, differing in their effects on rates and direction of flow. The position of landscape structures along this permeability gradient depends on attributes of both the flow and of the structure itself. We discuss boundaries and corridors in terms of mover specificity, scale, and effects on different levels of ecological organization, using rivers and streams to illustrate our points. We predict which structures will act as boundaries or corridors and at what spatial and temporal scales they are likely to be relevant. Considering the function of landscape structures across the boundary-corridor continuum will provide researchers and managers with a more complete, holistic viewpoint and will allow better strategies to attain conservation goals. Linderos y Corredores Como un Control de Flujo Ecológico Continuo: Lecciones de Ríos y ArroyosResumen: Los linderos y corredores de paisajes son áreas de extensión espacial pequeña con relación a la gran magnitud de sus efectos en los flujos ecológicos. En la literatura ecológica existe la tendencia de tratar a los corredores y a los linderos como un fenómeno separado en el paisaje. Sin embargo, esta estrategia pierde la característica común fundamental entre estos dos elementos: una fuerte influencia en los flujos ecológicos. Los corredores y los linderos existen a en extremos opuestos de un gradiente de permeabilidad, difieren en sus efectos en cuanto a las tasas y la dirección del flujo. La posición de estructuras del paisaje a lo largo de este gradiente de permeabilidad depende de los atributos tanto del flujo, como de la estructura en sí misma. Nosotros discutimos los linderos y los corredores en términos de especificidad del transportador, la escala y sus efectos en diferentes niveles de organización ecológica y utilizamos ríos y arroyos para ilustrar nuestros puntos. Predecimos cuales estructuras actuarían como linderos o corredores y a que escala espacial y temporal podrían ser relevantes. Considerando que la función de las estructuras del paisaje a lo largo de un continuo lindero-corredor proporcionará a los investigadores y manejadores un punto de vista mas completo e integral y dará cabida a mejores estrategias para alcanzar las metas de conservación.

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“…Hydropower is a safe, low-cost, clean, sustainable source of renewable energy for many countries (Renöfalt et al, 2010;Jager and Smith, 2008;Frey and Linke, 2002) and bridges a significant gap in world energy markets by supplying a fifth of world energy consumption (Bakis, 2007). However, hydropower generation has socioeconomic and environmental implications (Demirbas, 2007;Andersson et al, 2006;Nilsson et al, 2005;Jansson et al, 2000;Dynesius and Nilsson, 1994).…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modelling of the Impact of Climate Change and Power Flow Management Options using STELLA: Application to the Steephill Falls Reservoir, Ontario, Canada

Oni

Dillon

Metcalfe

et al. 2012

Canadian Water Resources Journal / Revue canadienne des ressour

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This paper presents a dynamic modelling framework for evaluating the impact of climate change and flow management options on a hydroelectric power reservoir. The model couples the HBV (Hydrologiska Byråns Vattenbalansavdelning) rainfall-runoff model to a generic reservoir routing model. The efficacy of the model was tested on the Steephill Falls hydropower facility located in the Magpie River watershed in Northern Ontario. Both the impact of climate change and future energy demands were evaluated. Using a statistical downscaling approach, future climate under Intergovernmental Panel on Climate Change (IPCC) A1B and A2 emission scenarios was projected from the Canadian Global Circulation Model 3 (CGCM3). Both scenarios suggest a significantly increasing trend in air temperature (p B 0.001) corresponding to a 1.78C increase by the middle of the century and a 2.98C to 3.78C increase by the end of the century relative to the baseline period (1970Á2000). The model performed well in simulating the inter-annual seasonal dynamics of the reservoir. Plausible climate-induced increase in runoff input into the reservoir might be counterbalanced by increased drawdown caused by increasing energy demands and water users, resulting in increased pressure to adjust lower reservoir rule curves, in-stream flow requirements downstream, or a combination of both.

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Fragmentation of Riparian Floras in Rivers With Multiple Dams

Cited by 176 publications

References 19 publications

The Effect of Glines Canyon Dam on Hydrochorous Seed Dispersal in the Elwha River

The Effect of Glines Canyon Dam on Hydrochorous Seed Dispersal in the Elwha River

Boundaries and Corridors as a Continuum of Ecological Flow Control: Lessons from Rivers and Streams

Dynamic Modelling of the Impact of Climate Change and Power Flow Management Options using STELLA: Application to the Steephill Falls Reservoir, Ontario, Canada

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