Dissolved organic carbon fluxes from a New England salt marsh
49 Introduction 52 Methods 54 Study site 54 Sunlight irradiation incubations 55 Anoxia incubation 56 Sample analysis 57 Results 59 Composition 62 Anoxia 64 Species 64 Sunlight 64 Biomass type 65 Microbial contribution 65 Seasonal leaching fluxes 66 Discussion 68 Anoxia 68 Species 69 Sunlight 70 Biomass type 71 Microbial contribution 72 Seasonal leaching fluxes 73 Conclusions 80 CHAPTER 4: NEPONSET SALT MARSH SEDIMENT SOURCES OF DISSOLVED ORGANIC MATTER 82 Abstract 82. 82