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Structure and Composition of Leachfield Bacterial Communities: Role of Soil Texture, Depth and Septic Tank Effluent Inputs
Structure and Composition of Leachfield Bacterial Communities: Role of Soil Texture, Depth and Septic Tank Effluent Inputs
- Source :
- Water, Vol 4, Iss 3, Pp 737-749 (2012), Water, Vol 4, Iss 3, Pp 707-719 (2012), Water, Volume 4, Issue 3, Pages 707-719
- Publication Year :
- 2012
- Publisher :
- MDPI AG, 2012.
-
Abstract
- Although groundwater quality depends on microbial processes in the soil treatment area (STA) of onsite wastewater treatment systems (OWTS), our understanding of the development of these microbial communities is limited. We examined the bacterial communities of sand, sandy loam, and clay STAs at different depths in response to septic tank effluent (STE) addition using mesocosms. Terminal restriction fragment length polymorphism (TRFLP) analysis was used to compare the bacterial community structure and composition of STE, native soil prior to STE addition (UNX) and soil exposed to STE (EXP). Principal component analysis separated communities with depth in sand but not in sandy loam or clay. Indices of richness, diversity, and evenness followed the order: sandy loam > sand > clay. Analysis of TRF peaks indicated that STE contributed least to the composition of STA bacterial communities (5%–16%), followed by UNX soil (18%–48%), with the highest proportion of the community made up of TRFs not detected previously in either UNX or STE (50%–82%) for all three soils. Soil type and depth can have a marked effect on the structure and composition of STA bacterial communities, and on the relative contribution of native soil and STE to these communities.
- Subjects :
- lcsh:Hydraulic engineering
Soil texture
media_common.quotation_subject
Geography, Planning and Development
soil depth
0207 environmental engineering
Septic tank
02 engineering and technology
010501 environmental sciences
Aquatic Science
01 natural sciences
Biochemistry
03 medical and health sciences
lcsh:Water supply for domestic and industrial purposes
lcsh:TC1-978
020701 environmental engineering
Effluent
0105 earth and related environmental sciences
030304 developmental biology
Water Science and Technology
media_common
0303 health sciences
lcsh:TD201-500
030306 microbiology
Ecology
Community structure
soil texture
15. Life on land
Soil type
6. Clean water
Terminal restriction fragment length polymorphism
Agronomy
microbial community structure
Loam
Soil water
Environmental science
onsite wastewater treatment systems
soil treatment area
terminal restriction fragment length polymorphism
septic tank effluent
Subjects
Details
- Language :
- English
- ISSN :
- 20734441
- Volume :
- 4
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Water
- Accession number :
- edsair.doi.dedup.....b91a70280468fc3398d9de62621e908c