Physical habitat template of lotic systems: Recovery in the context of historical pattern of spatiotemporal heterogeneity

Poff, N. LeRoy; Ward, J. V.

doi:10.1007/bf02394714

Cited by 497 publications

(358 citation statements)

References 99 publications

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“…These environmental factors show very diverse ranges, from physical, chemical, and biological characteristics in streams or rivers, to climate, land use, and geomorphology in watershed (Stevenson and Pan, 1999). Frissell et al (1986) proposed the idea of a hierarchical, landscapescale view of stream habitat, which provides a useful conceptual context for many aspects of both basic and applied stream ecology (Poff and Ward, 1990;Townsend, 1996;Poff, 1997). Poff (1997) developed a concept of multi-scale habitat filters and functional organization in streams, specifying a set of four habitat levels, including watershed, reach, channel unit, and microhabitat.…”

Section: Discussionmentioning

confidence: 99%

Relationships between three major stream assemblages and their environmental factors in multiple spatial scales

Bae

Kwon

Hwang

et al. 2011

Ann. Limnol. - Int. J. Lim.

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-This study investigated the relationships of three major aquatic assemblages (diatom, macroinvertebrate, and fish) and environmental variables, including sub-basin, hydrology, land cover, and water quality variables on multiple scales. Samples were collected at 720 sampling sites on the Korean nationwide scale. Geological variables, including altitude and slope, showed a strong positive correlation with proportions of forest in land cover types and cobbles in substrates, while they were negatively correlated with water quality variables, including conductivity and total phosphorus. Considering the concordance of the different assemblages, species richness of fish and macroinvertebrates displayed significant correlation, and diatoms were significantly correlated with fish. However, diatoms did not show significant correlation with macroinvertebrates. Altitude and slope showed significant correlation with all biological variables of the three assemblages. Macroinvertebrates and fish showed positive relations with large substrate sizes. Indices of diatoms and macroinvertebrates well reflected the perturbation of water quality variables. However, fish indices showed a relatively low association with water quality variables, compared with those of diatoms and macroinvertebrates. These patterns were also confirmed by the ordination and prediction of biological indices with environmental variables through the learning process of a self-organizing map as well as random forest. Overall, our study supports the concept of multi-scale habitat filters and functional organization in streams, and is consistent with the recommended use of multiple biological indices with more than one assemblage for the assessment of the biotic integrity of aquatic ecosystems.

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Section: Discussionmentioning

confidence: 99%

Relationships between three major stream assemblages and their environmental factors in multiple spatial scales

Bae

Kwon

Hwang

et al. 2011

Ann. Limnol. - Int. J. Lim.

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“…The natural flow regime (NFR) of rivers is defined by the magnitude, frequency, duration, timing, and rate of change of flow events, each of which affects stream-dwelling aquatic organisms over short-term to evolutionary timescales (Poff et al 1997). Many anthropogenic activities can alter the flow and disturbance regimes of streams, which in turn may affect the survival and fitness of native species (Poff and Ward 1990;Reice et al 1990;Strayer and Dudgeon 2010). Impoundment of water by dams, built for either irrigation, flood control, or hydroelectricity generation, is one of the greatest anthropogenic drivers of change to NFRs.…”

Section: Introductionmentioning

confidence: 99%

Run-of-River hydropower and salmonids: potential effects and perspective on future research

Gibeau

Connors

Palen

2017

Can. J. Fish. Aquat. Sci.

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Abstract:The spatial footprint of individual run-of-river (RoR) hydropower facilities is smaller than reservoir-storage hydroelectric projects and their impacts to aquatic ecosystems are often assumed to be negligible. However, these effects are poorly understood, especially for salmonids whose freshwater habitat often overlaps with RoR hydropower potential. Flow regulation for RoR hydropower is unique in how it influences the seasonality and magnitude of flow diversion and because low-head dams can be overtopped at high flows. Based on a review of the primary literature, we identified three pathways of effects by which RoR hydropower may influence salmonids: reduction of flow, presence of low-head dams impounding rivers, and anthropogenic flow fluctuations. We synthesized empirical evidence of effects of RoR hydropower on river ecosystems from 31 papers, of which only 10 explicitly considered salmonids. We identified key research gaps including impacts of extended low-flow periods, anthropogenic flow fluctuations, and cumulative effects of multiple RoR projects. Filling these gaps is necessary to help manage and conserve salmonid populations in the face of the growing global demand for small-scale hydropower.Résumé : L'empreinte spatiale individuelle des centrales hydroélectriques au fil de l'eau est moindre que celle des centrales hydroélectriques avec réservoirs de retenue et, en conséquence, leurs impacts sur les écosystèmes aquatiques sont souvent jugés négligeables. Par contre, leurs effets écologiques sont peu connus, particulièrement pour les salmonidés dont l'habitat en eau douce coïncide souvent avec le potentiel hydroélectrique des centrales au fil de l'eau. La régulation des eaux par les centrales au fil de l'eau se distingue par son influence sur la saisonnalité et l'ampleur de la déviation des eaux, et parce que les barrages de basse-chute peuvent être submergés lors des crues. À la lumière d'un examen des sources documentaires primaires, nous avons cerné trois voies principales par lesquelles la production d'électricité des centrales au fil de l'eau peut influencer les salmonidés, soit la réduction des débits, la présence de barrages de basse-chute sur les rivières et des fluctuations d'origine humaine des débits. Nous avons produit une synthèse des résultats empiriques de 31 études portant sur les effets de la production d'hydroélectricité des centrales au fil de l'eau sur les écosystèmes lentiques, dont seulement dix s'intéressaient explicitement aux salmonidés. Nous avons cerné d'importantes lacunes dans les connaissances actuelles, dont l'impact de périodes prolongées de faible débit, des fluctuations d'origine humaine des débits et des effets cumulatifs de plusieurs centrales au fil de l'eau. Il est nécessaire de combler ces lacunes pour soutenir la gestion et la conservation durables des populations de salmonidés dans un contexte de demande mondiale croissante pour la production d'hydroélectricité à petite échelle.

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“…Community structure of benthic invertebrates in rivers change both spatially and temporally, largely in relation to environmental factors (Allan 1995, Poff & Ward 1990, Bretschko 1995. Flow, substratum, temperature, water chemistry, aquatic plants, food, and biotic interactions rule community composition and structure (Armitage 1984, Ward 1992.…”

Section: Introductionmentioning

confidence: 99%

Macroinvertebrate functional organization and water quality in a large arid river from Patagonia (Argentina)

Miserendino

2007

Ann. Limnol. - Int. J. Lim.

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Physical habitat template of lotic systems: Recovery in the context of historical pattern of spatiotemporal heterogeneity

Cited by 497 publications

References 99 publications

Relationships between three major stream assemblages and their environmental factors in multiple spatial scales

Relationships between three major stream assemblages and their environmental factors in multiple spatial scales

Run-of-River hydropower and salmonids: potential effects and perspective on future research

Macroinvertebrate functional organization and water quality in a large arid river from Patagonia (Argentina)

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