From what I can gather, the various studies that have evaluated decomposition in marine and freshwater habitats have used different methods, and I'd like to know which of these two habitats typically has more rapid decay rates.
Probably not exactly what you are looking for, but Caraco et al. 1990 might be a place to start? Looks at phosphorus processes in both systems.
Article A Comparison of Phosphorus Immobilization in Sediments of Fr...
Temperature and soil organic matter decomposition rates–synthesis of current knowledge and a way forward
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.718.1819&rep=rep1&type=pdf
ORGANIC MATTER DECOMPOSITION IN WESTERN UNITED STATES FORESTS
https://forest.moscowfsl.wsu.edu/smp/solo/documents/GTRs/INT_280/Edmonds_INT-280.php
Mountain lakes increase organic matter decomposition rates in streams
https://www.journals.uchicago.edu/doi/abs/10.1899/09-070.1?mobileUi=0&journalCode=jnortamerbentsoc
The best approach to compare freshwater & marine habitat decomposition is to select an estuary or mangrove to conduct experiments in different seasons...
You may see the following paper, which may be of some use to you.
Best wishes
Sridhar, K.R., Karamchand, K.S. and Sumathi, P. 2010. Fungal colonization and breakdown of sedge (Cyperus malaccensis Lam.) in a southwest mangrove, India. Botanica Marina 53, 525-533.
Hi Scott, Antje Bierschenk assessed cellulose breakdown across a freshwater-marine continuum in 10 New Zealand catchments using two different cotton material types. Her work is published: "Bierschenk, A. M., C. Savage, C. R. Townsend, and C. D. Matthaei. 2012. Intensity of land use in the catchment influences ecosystem functioning along a freshwater‐marine continuum. Ecosystems15: 637–651." Article Intensity of Land Use in the Catchment Influences Ecosystem ...
This paper directly compares decomposition OM rates from different systems. It includes freshwaters and marine.
Article Organic carbon decomposition rates controlled by water reten...
Have you read this one :
"Leaf litter degradation in highly turbid transitional waters: preliminary results from litter-bag experiments in the Gironde Estuary" Fuentes-Cid, A.; Chauvet, E.; Etcheber, H.; et al. GEODINAMICA ACTA 27(1) Pages: 60-66 JAN 2 2015
Chong, L., Berelson, W., McManus, J., & Rollins, N. (2018). Meter-Scale Early Diagenesis of Organic Matter Buried Within Deep-Sea Sediments Beneath the Amazon River Plume. Frontiers in Marine Science, 5, 250.
I think this could help
Alternative approaches for estimating components of lake metabolism using the free-water dissolved-oxygen (FWDO) method Authors: McNair, James N.; Sesselmann, Meagan R.; Kendall, Scott T.; Gereaux, Leon C.; Weinke, Anthony D.; Biddanda, Bopaiah A.
DOI: https://doi.org/10.1127/fal/2015/0626
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