Nutrient deficiency in dune slack pioneer vegetation: a review |
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Authors: | E J Lammerts A P Grootjans |
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Institution: | (1) Ministry of Agriculture, Nature Management and Fisheries, P.O. Box 30032, NL-9700 RM Groningen, The Netherlands;(2) Laboratory of Plant Ecology, P.O. Box 14, NL-9750 AA Haren, The Netherlands |
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Abstract: | A review of results of fertilization experiments in wet dune slacks is presented. In most cases the above-ground biomass appeared
to be limited by nitrogen availability. Primary phosphorus limitation was assessed only once in a dune slack where sod cutting
had been applied very recently. In most other case studies phosphorus limits biomass production after nitrogen deficiency
was lifted. Potassium availability is of minor importance for biomass production in this type of ecosystem. Singular nitrogen
additions led to increased dominance ofCarex andJuncus species as well as perennial grasses, such asAgrostis stolonifera andCalamagrostis epigejos. A combined addition of nitrogen and phosphorus led to total dominance of grasses, while the characteristic basiphilous pioneer
species (including mosses) decreased or even disappeared. Certain mechanisms are considered which may maintain nutrient availability
in slacks with basiphilous pioneer vegetation at a low level, despite of the accumulation of nutrients in the developing organic
soil layer. Some implications for management and further research are discussed. |
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Keywords: | Fertilization experiment Junco baltici-Schoenetum nigricantis Succession |
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