Table Of Content

ty Biogeochemistry 44: 339-340, 1999. Contents Volume 44 1999 Volume 44 No.1 January 1999 B. GARBAN, D. OLLIVON, A. JAIRY, A. M. CARRU & A. CHES- TERIKOFF / The role of phytoplankton in pollutant transfer processes in rivers. Example of River Marne (France) . D. CORRE, D. J. PENNOCK, C. VAN KESSEL & D. K. ELLIOTT/ Estimation of annual nitrous oxide emissions from a transitional grassland-forest region in Saskatchewan, Canada .-M. MORTH, P. TORSSANDER, M. KUSAKABE & H. HULTBERG / Sulfur isotope values in a forested catchment over four years: Evidence for oxidation and reduction processes . SEIFERT, N. DELLING, H. H. RICHNOW, S. KEMPE, J. HEFTER & W. MICHAELIS / Ethylene and methane in the upper water column of the subtropical Atlantic . CHEN & R. R. TWILLEY / A simulation model of organic matter and nutrient accumulation in mangrove wetland soils Volume 44 No.2 February 1999 J. A. HEATH & B. J. HUEBERT / Cloudwater deposition as a source of fixed nitrogen in a Hawaiian montane forest 119-134 H . PEDERSEN, K. A. DUNKIN & M. K. FIRESTONE / The relative impor- tance of autotrophic and heterotrophic nitrification in a conifer forest soil as measured by ISN tracer and pool dilution techniques 135-150 . J. DOWRICK, S. HUGHES, C. FREEMAN, M. A. LOCK, B. REYNOLDS & J. A. HUDSON/ Nitrous oxide emissions from a gully mire in mid-Wales, UK, under simulated summer drought 151-162 . ALM, S. SAARNIO, H. NYKANEN, J. SILVOLA & P. J. MARTIKAINEN/ Winter CO2, CH4 and N20 fluxes on some natural and drained boreal peatlands 163-186 . J. DEVITO, A. R. HILL & P. J. DILLON / Episodic sulphate export from wetlands in acidified headwater catchments: prediction at the landscape scale 187-203 . VAN DEN POL-VAN DASSELAAR, M. L. VAN BEUSICHEM & O. OENEMA / Methane emissions from wet grasslands on peat soil in a nature preserve 205-220 . VAN DEN POL-VAN DASSELAAR, M. L. VAN BEUSICHEM & O. OENEMA / Determinants of spatial variability of methane emissions from wet grasslands on peat soil 221-237 340 Volume 44 No.3 March 1999 M. NIKLINSKA, M. MARYANSKI & R. LASKOWSKI!/ Effect of temperature on humus respiration rate and nitrogen mineralization: Implications for global climate change |. RECHE, M. L. PACE & J. J. COLE / Relationship of trophic and chem- ical conditions to photobleaching of dissolved organic matter in lake ecosystems ALEWELL, M. J. MITCHELL, G. E. LIKENS& H. R. KROUSE / Sources of stream sulfate at the Hubbard Brook Experimental Forest: Long-term analyses using stabie isotopes W. L. SILVER, A. E. LUGO & M. KELLER / Soil oxygen availability and biogeochemistry along rainfall and topographic gradients in upland wet tropical forest soils instructions for Authors 329-335 Author Index 337 Volume Contents 339-340