Tropical macrophyte degradation dynamics in freshwater sediments: relationship to greenhouse gas production

Bianchini, Irineu

doi:10.1007/s11368-013-0735-x

Cited by 10 publications

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As labile substances, autochthonous organic matter such as CBB is degraded independent of oxygen availability . However, temperature and sediment have strong effects on decomposition of settled autochthonous organic matter such as macrophyte litter . Temperature is one of the most important factors controlling the mineralization of organic carbon in lake sediment , and warmer water temperature results in a greater level of mineralization in lakes .…”

Section: Introductionmentioning

confidence: 99%

Identifying the Chemical Composition of Decomposed Residues From Cyanobacterial Bloom Biomass by Pyrolysis‐GC/MS

Liu

Shi

et al. 2016

CLEAN Soil Air Water

View full text Add to dashboard Cite

The frequent occurrence of cyanobacterial blooms in eutrophic lakes can lead to a high amount of biomass in aquatic systems, and following cell death, this autochthonous organic matter will eventually decompose. In this study, the effect of temperature and sediment on the chemical composition of cyanobacterial biomass residue was investigated by microcosm experiment. The results showed that the lowest cyanobacterial bloom biomass (CBB) removal efficiency was recorded at 32°C regardless of the presence or absence of sediment. Based on total organic carbon, the CBB removal efficiencies were higher than 90% at 20-29°C but less than 87.0% at 32°C. Pyrolysis gas chromatography mass spectrometry and Fourier transform infrared analysis indicated that organic nitrogen compounds (e.g., carbamic acid monoammonium salt) and polysaccharides (e.g., 2-propanone, 1-hydroxy-) were the main components in the residues. Based on the determined components in the residues under different conditions, unweighted pair group clustering method with arithmetic averages and principal components analysis further suggested that sediment and temperature had obvious influence on the chemical composition of CBB decomposition residues. Considering that cyanobacteria biomass is produced annually in eutrophic lakes, residues from CBB may contribute to the nitrogen/carbon cycles and macro-fauna growth in these ecosystems.

show abstract

Section: Introductionmentioning

confidence: 99%