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Titolo:
A geomorphological framework for river characterization and habitat assessment
Autore:
Thomson, JR; Taylor, MP; Fryirs, KA; Brierley, GJ;
Indirizzi:
Macquarie Univ, Div Environm & Life Sci, Dept Phys Geog, N Ryde, NSW 2109,Australia Macquarie Univ N Ryde NSW Australia 2109 Geog, N Ryde, NSW 2109,Australia
Titolo Testata:
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
fascicolo: 5, volume: 11, anno: 2001,
pagine: 373 - 389
SICI:
1052-7613(200109/10)11:5<373:AGFFRC>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROHABITAT PREFERENCES; MACROINVERTEBRATE FAUNAS; BENTHIC INVERTEBRATES; HIERARCHICAL APPROACH; COMMUNITY STRUCTURE; WOODLAND STREAM; RIFFLES; ECOLOGY; SCALE; FLOW;
Keywords:
classification; ecology; geomorphology; habitat; habitat assessment; River Styles;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
64
Recensione:
Indirizzi per estratti:
Indirizzo: Brierley, GJ Macquarie Univ, Div Environm & Life Sci, Dept Phys Geog, N Ryde, NSW 2109,Australia Macquarie Univ N Ryde NSW Australia 2109 NSW 2109,Australia
Citazione:
J.R. Thomson et al., "A geomorphological framework for river characterization and habitat assessment", AQUAT CONS, 11(5), 2001, pp. 373-389

Abstract

1. Methods to assess the physical habitat available to aquatic organisms provide important tools for many aspects of river management, including river health monitoring, determination of river restoration/rehabilitation strategies, setting and evaluating environmental flows and as surrogates for biodiversity assessment.2. Procedures used to assess physical habitat need to be ecologically and geomorphologically meaningful, as well as practicable. A conceptual methodological procedure is presented that evaluates and links instream habitat and geomorphology.3. The heterogeneity of habitat potential is determined within geomorphic units (such as pools, runs, riffles) by assessing flow hydraulics and substrate character. These two variables are integrated as hydraulic units - patches of uniform flow and substrate.4. This methodology forms a logical extension of the River Styles framework that characterizes river form and behaviour at four inter-related scales:catchments, landscape units, River Styles (reaches) and geomorphic units. As geomorphic units constitute the basis to assess aquatic habitat availability, and they form the building blocks of river and floodplain systems, intact reaches of a particular River Style should have similar assemblages ofinstream and floodplain habitat.5. An application of the hydraulic unit procedure is demonstrated in gorge, partly-confined and alluvial River Styles front the Manning catchment in northern New South Wales, Australia. Copyright (C) 2001 John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/10/20 alle ore 12:28:52