Do earthworms affect dynamics of functional response and genetic structure of microbial community in a lab-scale composting system?

Autor: Biswarup Sen, T.S. Chandra
Rok vydání: 2009
Předmět:
Enzymatic activities
principal component analysis
bacterial count
Functional response
population
Pilot Projects
electrokinesis
ammonia
nitrogen
Soil
genetic variability
genetic structure
laboratory method
Food science
DGGE
earthworm
oxidoreductase
Bacteria (microorganisms)
Waste Management and Disposal
Soil Microbiology
organic matter
chemistry.chemical_classification
education.field_of_study
pH
Compost
denaturing gradient gel electrophoresis
dynamics
General Medicine
bacterium
enzyme activity
Bacteria
Aerobic
priority journal
microbial community
Temperature gradient gel electrophoresis
BiologTM method
gel
vermicompost
Environmental Engineering
Vermicomposting
Population
biological activity
Bioengineering
Biology
engineering.material
complex mixtures
Microbiology
functional response
Organic compounds
Eudrilus eugeniae
physical chemistry
Earthworms
Animals
Organic matter
Oligochaeta
education
nonhuman
Nitrates
maturation
molecular evolution
Renewable Energy
Sustainability and the Environment
carbon
physicochemical property
Earthworm
ash
biology.organism_classification
monitoring
Microbial population biology
chemistry
physiology
composting
engineering
laboratory
Vermicompost
rating scale
Zdroj: Bioresource Technology. 100:804-811
ISSN: 0960-8524
DOI: 10.1016/j.biortech.2008.07.047
Popis: Two laboratory-scale systems were set up (i) composting (without earthworms) and (ii) vermicomposting (with earthworms) and were monitored for 60 days after pre-composting. The physico-chemical parameters (pH, C/N, organic matter, NH 4 + - N and ash content) showed similar evolution in both systems except a higher NH 4 + - N in the initial vermicomposts. However, principle component analysis (PCA) of enzymatic activities and community level physiological profiles revealed differences in the functional response of microbial communities in compost and vermicompost during maturation. Dehydrogenase activity and bacterial counts indicated a steady decrease in biological activity and population during composting, whereas vermicomposting exhibited higher activity on day 30 and a reduction in bacterial counts on day 10. PCA of denatured gradient gel electrophoresis (DGGE) profiles showed divergent dynamics of bacterial communities in two processes. These results indicated differences in the functional response and genetic structure of microbial community in composts and vermicomposts despite similar changes in their physico-chemical parameters.
Databáze: OpenAIRE
Externí odkaz: