Marsh Soils as Potential Sinks for Bacteroides Fecal Indicator Bacteria, Waccamaw National Wildlife Refuge, Georgetown, SC, USA

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• 作者：Judith Z. Drexler (1)
  Heather E. Johnson (2)
  Joseph Duris (2)
  Ken W. Krauss (3)
  
• 关键词：Bacteroides ; Fecal indicator bacteria ; Microbial source tracking ; Tidal freshwater marsh
• 刊名：Water, Air, and Soil Pollution
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：225
• 期：2
• 全文大小：424 KB
• 作者单位：Judith Z. Drexler (1)
  Heather E. Johnson (2)
  Joseph Duris (2)
  Ken W. Krauss (3)
  
  1. California Water Science Center, U.S. Geological Survey, 6000 J Street, Sacramento, CA, 95819, USA
  2. Michigan Water Science Center, U.S. Geological Survey, 6520 Mercantile Way, Suite 5, Lansing, MI, 48911, USA
  3. National Wetlands Research Center, U.S. Geological Survey, 700 Cajundome Blvd., Lafayette, LA, 70506, USA
  
• ISSN：1573-2932

文摘

A soil core collected in a tidal freshwater marsh in the Waccamaw National Wildlife Refuge (Georgetown, SC) exuded a particularly strong odor of cow manure upon extrusion. In order to test for manure and determine its provenance, we carried out microbial source tracking using DNA markers for Bacteroides, a noncoliform, anaerobic bacterial group that represents a large proportion spectrum of the fecal population. Three core sections from 0- cm, 9-2 cm, and 30-3 cm were analyzed for the presence of Bacteroides. The ages of core sediments were estimated using 210Pb and 137Cs dating. All three core sections tested positive for Bacteroides DNA markers related to cow or deer feces. Because cow manure is stockpiled, used as fertilizer, and a source of direct contamination in the Great Pee Dee River/Winyah Bay watershed, it is very likely the source of the Bacteroides that was deposited on the marsh. The mid-points of the core sections were dated as follows: 0-?cm, 2009; 9-2?cm, 1999, and 30-3?cm, 1961. The presence of Bacteroides at different depths/ages in the soil profile indicates that soils in tidal freshwater marshes are, at the least, capable of being short-term sinks for Bacteroides and, may have the potential to be long-term sinks of stable, naturalized populations.