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Titolo:
Groundwater variables and vegetation in dune slacks
Autore:
Lammerts, EJ; Maas, C; Grootjans, AP;
Indirizzi:
Govt Serv Land & Water Management DLG, NL-9700 RM Groningen, Netherlands Govt Serv Land & Water Management DLG Groningen Netherlands NL-9700 RM s Kiwa NV Res & Consultancy, NL-3430 BB Nieuwegein, Netherlands Kiwa NV Res & Consultancy Nieuwegein Netherlands NL-3430 BB Netherlands Univ Groningen, Lab Plant Ecol, NL-9750 AA Haren, Netherlands Univ Groningen Haren Netherlands NL-9750 AA L-9750 AA Haren, Netherlands
Titolo Testata:
ECOLOGICAL ENGINEERING
fascicolo: 1, volume: 17, anno: 2001,
pagine: 33 - 47
SICI:
0925-8574(200104)17:1<33:GVAVID>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
COASTAL;
Keywords:
dune slack; geohydrology; Schoenus nigricans; time series; water table;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Lammerts, EJ Govt Serv Land & Water Management DLG, POB 30027, NL-9700 RM Groningen, Netherlands Govt Serv Land & Water Management DLG POB 30027 Groningen Netherlands NL-9700 RM
Citazione:
E.J. Lammerts et al., "Groundwater variables and vegetation in dune slacks", ECOL ENG, 17(1), 2001, pp. 33-47

Abstract

Basiphilous pioneer plant communities, influenced by phreatic groundwater,are endangered in The Netherlands. In dune slacks of the Dutch Wadden Sea islands, their area has also declined, though they still occur fairly frequently. For purposes of nature conservancy it is important to know how to maintain or restore suitable habitats. The aim of this investigation is to identify variables which describe the hydrological conditions required by these dune slack communities adequately without being easily disturbed by climatological fluctuations. Data sets of groundwater table depths from 38 sites in 16 dune slacks were analysed. Plots of site-specific seepage fluxes versus groundwater table depths were inferred which served well in modelling the hydrological regimes of all sites on the basis of a given start value for table depths and subsequent precipitation surplus data. Three groundwater variables describing the plots to a large extent were derived. To infer the physical meaning of these new variables they were related to three conventional hydrological variables (mean lowest groundwater level (MLG), inundation percentage and daily fluctuation) by applying a principal component analysis. The new variables could easily be interpreted in terms of known hydrological features and two of them could describe the hydrological variation adequately. The relationships of these two site-specific groundwater variables to abiotic habitat features and vegetation composition were assessed. Together they very well indicated the presence of basiphilous pioneer vegetation. Also they related clearly to favourable abiotic conditions for thisvegetation. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 19:13:59