Heathlands: Patterns and Processes in a Changing Environment by G. W. Heil, R. Aerts (auth.), R. Aerts, G. W. Heil (eds.)

By G. W. Heil, R. Aerts (auth.), R. Aerts, G. W. Heil (eds.)

Increased atmospheric nitrogen deposition and alterations within the administration of heathlands have brought on an important swap within the species composition of the NW-European heathlands. this alteration from ericaceous in the direction of gramineous dominance is analysed intimately in Heathlands:Patterns and procedures in a altering Environment. specific emphasis is wear the results of elevated atmospheric nutrient enter on nutrient biking, festival among plant species and plant--herbivore interactions. the chances for the long term conservation of heathlands are mentioned through contemplating regeneration from seed and the usefulness of mathematical administration models.
The ebook offers a synthesis of natural and utilized plant ecology. it's important interpreting for plant ecologists, organic conservationists, heathland managers and executive selection makers.

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Additional info for Heathlands: Patterns and Processes in a Changing Environment

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Throughflow of sulphate, ammonium and nitrate (as % of bulk deposition) in heathland vegetation at site 2 (Elspeetsche Veld) during the one-year monitoring period (17 April 1989-17 April 1990). 5. ; n = 5) at two Callunadominated heathland sites (site 1, Asselse Heide: 12 October 1988 until 5 July 1989; site 2, Elspeetsche Veld: 17 April 1989 until 17 April 1990). Site 1 (Asselse Heide) Bulk deposition 658 (37) Throughflow 1657 (133) Interception 999 deposition" Corrected for uptake b Site 2 (Elspeetsche Veld) Bulk deposition 710 (18) Throughflow 2069 (216) Interception 1359 966 (77) 1048 (245) 82 379 (12) 437 (64) 58 691 846 (42) 2146 (311) 1300 387 (3) 935 (145) 548 deposition' Corrected for uptake b 1359 a Interception deposition of SO" NH y and NO x is calculated as throughflow minus bulk deposition.

1. 2. 3. 4. 6. 7. 8. 1. Introduction in the eastern and south-eastern parts of the Netherlands which have large concentrations of intensive animal husbandry (Fig. 1). Most of these areas are located on subsoil of nutrientpoor sands from the Pleistocene and almost all of the Dutch heathland ecosystems are located in these parts of the Netherlands. Quantifying atmospheric input is a prerequisite to understand the adverse effects of air pollutants at the ecosystem level. e. the sum of wet deposition and sedimentation of heavy aerosols, are hardly influenced by the characteristics of the surfaces on which they are deposited.

The ammonia/ammonium deposition is especially high 25 R. W. ), Heathlands: Patterns and Processes in a Changing Environment, 25-50. © 1993 Kluwer Academic Publishers. r: "0 >- oz I~ ;' ~! , Q. "0 27 1982; Ivens 1990). g. grassland, heathland) has rather smooth canopies and captures much smaller amounts of atmospheric deposition. Recently, it has been demonstrated that dry deposition of nitrogen and sulphur is not negligible at all in low vegetation (Heil et al. 1988). Furthermore, in regions where both sulphur dioxide and ammonia emissions occur simultaneously, co-deposition upon (wet) surfaces is to be expected due to their opposite pH-dependent behaviour.

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