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Titolo:
A method for estimating the extent of standing fresh waters of different trophic states in Great Britain
Autore:
Palmer, MA; Roy, DB;
Indirizzi:
Ctr Ecol & Hydrol, Huntingdon PE18 2LS, Cambs, England Ctr Ecol & Hydrol Huntingdon Cambs England PE18 2LS 8 2LS, Cambs, England Anglia Polytech Univ, Environm Sci Res Ctr, Cambridge, England Anglia Polytech Univ Cambridge England Sci Res Ctr, Cambridge, England
Titolo Testata:
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
fascicolo: 3, volume: 11, anno: 2001,
pagine: 199 - 216
SICI:
1052-7613(200105/06)11:3<199:AMFETE>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
CLASSIFICATION; QUALITY;
Keywords:
biological recording; freshwater conservation; macrophytes; nutrient status; resource estimates; standing water classification; Trophic Ranking Score;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Roy, DB Ctr Ecol & Hydrol, Monks Wood, Huntingdon PE18 2LS, Cambs, EnglandCtr Ecol & Hydrol Monks Wood Huntingdon Cambs England PE18 2LS and
Citazione:
M.A. Palmer e D.B. Roy, "A method for estimating the extent of standing fresh waters of different trophic states in Great Britain", AQUAT CONS, 11(3), 2001, pp. 199-216

Abstract

1. The total area of standing fresh water in Great Britain has been estimated at approximately 2400 km(2). The aim of the work described in this paper was to estimate the extent of the dystrophic, oligotrophic, mesotrophic and eutrophic habitat types making up this total.2. Botanical survey data collected by the statutory nature conservation agencies provided habitat type and surface area for 3500 water bodies, mostlyin Scotland. Because survey in England and Wales had been less thorough than in Scotland, it was not possible to estimate the areas of habitat types simply by direct extrapolation from the survey sample to the total resourceof standing water in Great Britain.3. A system of Trophic Ranking Scores (TRS) has been developed fur aquaticplant species. Using plant records from the Biological Records Centre, a mean TRS fur each 10 x 10 km square was produced, and Great Britain was divided into TRS bands. For each of these bands, the percentage by surveyed area of each freshwater habitat type was calculated. These percentages were applied to the total area of standing water in each TRS band, obtained from Ordnance Survey summary statistics, in order to predict the proportions of the different habitat types likely to occur in each band. The extent of these habitats in Great Britain as a M hole could then be calculated.4. Estimates produced by this method of the extent of the four standing freshwater habitat types in Great Britain are: dystrophic - 11 km(2) (0.5%): oligotrophic - 1445 km(2) (60%): mesotrophic 267 km(2) (11%), eutrophic 679km(2) (28%).5. The application of this work to nature conservation is discussed. 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 26/09/20 alle ore 05:35:38