Summary
The concept of the relative nutrient requirement (L n) that was introduced in the first paper of this series is used to analyse the effects of the dominant plant population on nutrient cycling and nutrient mineralization in wet heathland ecosystems. A distinction is made between the effect that the dominant plant species has on (1) the distribution of nutrients over the plant biomass and the soil compartment of the ecosystem and (2) the recirculation rate of nutrients. The first effect of the dominant plant species can be calculated on the basis of the δ/k ratio (which is the ratio of the relative mortality to the decomposition constant). The second effect can be analysed using the relative nutrient requirement (L n). The mass loss and the changes in the amounts of N and P in decomposing above-ground and below-ground litter produced by Erica tetralix and Molinia caerulea were measured over three years. The rates of mass loss from both above-ground and below-ground litter of Molinia were higher than those from Erica litter. After an initial leaching phase, litter showed either a net release or a net immobilization of nitrogen or phosphorus that depended on the initial concentrations of these nutrients. At the same sites, mineralization of nitrogen and phosphorus were measured for two years both in communities dominated by Molinia and in communities dominated by Erica. There were no clear differences in the nitrogen mineralization, but in one of the two years, phosphate mineralization in the Molinia-community was significantly higher. On the basis of the theory that was developed, mineralization rates and ratios between amounts of nutrients in plant biomass and in the soil were calculated on the basis of parameters that were independently measured. There was a reasonable agreement between predicted and measured values in the Erica-communities. In the Molinia-communities there were large differences between calculated and measured values, which was explained by the observation that the soil organic matter in these ecosystems still predominantly consisted of Erica-remains.
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References
Aerts R, Berendse F (1988) The effect of increased nutrient availability on vegetation dynamics in wet heathlands. Vegetatio 76:63–69
Berendse F (1985) The effect of grazing on the outcome of competition between plant populations with different nutrient requirements. Oikos 44:35–39
Berendse F, Aerts R (1984) Competition between Erica tetralix L. and Molinia caerulae (L.) Moench as affected by the availability of nutrients. Acta Oecologia/Oecol Plant 5:3–14
Berendse F, Aerts R (1987) Nitrogen-use-efficiency: a biologically meaningful definition? Functional Ecology 1:293–296
Berendse F, Beltman B, Bobbink R, Kwant R, Schmitz M (1987a) Primary production and nutrient availability in wet heathland ecosystems. Acta Oecologica/Oecol Plant 8:265–279
Berendse F, Berg, B, Bosatta E (1987b) The effect of lignin and nitrogen on the decomposition rate in nutrient-poor ecosystems: a theoretical approach. Can J Bot 65:1116–1120
Berendse F, Oudhof H, Bol J (1987c) A comparative study on nutrient cycling in wet heathland ecosystems. I. Litter production and nutrient losses from the plant. Oecologia 74:174–184
Berg B, Ågren GI (1984) Decomposition of needle litter and its organic chemical components: theory and field experiments. Long-termdecomposition in a Scots pine forest. III. Can J Bot 62:2880–2888
Berg B, Söderström B (1979) Fungal biomass and nitrogen in decomposing Scots pine needle litter. Soil Biol Biochem 11:339–341
Berg B, Staaf H (1980) Decomposition rate and chemical changes of Scots pine needle litter. II. Influence of chemical composition. Ecol Bull 32:373–390
Berg B, Staaf H (1981) Leaching, accumulation and release of nitrogen in decomposing forest litter. Ecol Bull 33:163–178
Bosatta E, Staaf H (1982) The control of nitrogen turn-over in forest litter. Oikos 39:143–151
Campbell CA, Paul EA, Rennie DA, McCallum KJ (1967) Applicability of carbon-dating method of analysis to soil humus studies. Soil Science 104:217–224
Clarholm M (1981) Protozoan grazing of bacteria in soil, impact and importance. Microb Ecol 7:343–350
Crocker RL, Major J (1955) Soil development in relation to vegetation and surface age at Glacier Bay, Alaska. J Ecol 43:427–448
Cromack K (1973) Litter production and decomposition in a mixed hardwood watershed and a white pine watershed at Coweeta Hydrologic Station, North Carolina. Dissertation, University of Georgia, Athens, USA
De Haan S (1977) Humus, its formation, its relation with the mineral part of the soil, and its significance for soil productivity. Soil organic matter studies, vol I, pp 21–30
Keyser P, Kirk TK, Zeikus JG (1978) Ligninolytic enzyme system of Phanerochaete chrysosporium: synthesized in the absence of lignin in response to nitrogen starvation. J Bacteriol 135:790–797
Melillo JM, Aber JD, Muratore JF (1982) Nitrogen and lignin control of hardwood leaf litter decomposition dynamics. Ecology 63:621–626
Miles J, Young WF (1980) The effects on heathland and moorland soils in Scotland and Northern England following colonization by Birch (Betula spp.). Bull Ecol 11:233–242
Mulder J, Van Breemen N, Rasmussen L, Driscoll CT (1988) Aluminium chemistry of acidic sandy soils with various inputs of acidic depositions in the Netherlands and in Denmark. In: Advancement in Chemistry, Am Chem Soc (in press)
Olson JS (1958) Rates of succession and soil changes on southern Lake Michigan sand dunes. Bot Gazette 119:125–170
Parnas H (1975) Model for decomposition of organic material by microorganisms. Soil Biol Biochem 7:161–169
Persson T (Ed.) (1980) Structure and function of northern coniferous forests. Ecol Bull (Stockholm) 32
Raison RJ, Connell MJ, Khanna PK (1987) Methodology for studying fluxes of soil mineral-N in situ. Soil Biol Biochem 19:521–530
Rosswall T, Granhall U (1980) Nitrogen cycling in a subarctic mire. Ecol Bull (Stockholm) 30:209–234
Swift MJ, Heal OW, Andersson JM (1979) Decomposition in terrestrial ecosystems. Stud Ecol 5:1–372
Tietema A, Kuikman P, Berendse F (1985) Mass loss, nutrient dynamics and influence of Diptera larvae in decomposing litter of Erica tetralix and Molinia caerulea. Pedobiologia 28:389–397
Tilman D (1985) The resource-ratio hypothesis of plant succession. Am Nat 125:827–852
Van Breemen N, Burrough PA, Velthorst EJ, Van Dobben HF, De Wit T, Ridder TB, Reijnders HFR (1982) Soil acidification from atmospheric ammonium sulphate in forest canopy throughfall. Nature 299:548–550
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Berendse, F., Bobbink, R. & Rouwenhorst, G. A comparative study on nutrient cycling in wet heathland ecosystems. Oecologia 78, 338–348 (1989). https://doi.org/10.1007/BF00379107
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DOI: https://doi.org/10.1007/BF00379107