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| Titel |
Microbes Characteristics in Groundwater Flow System in Mountainous Area |
| VerfasserIn |
Chisato Yamamoto, Maki Tsujimura, Kenji Kato, Koichi Sakakibara, Mahiro Ogawa, Ayumi Sugiyama, Kazuyo Nagaosa |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250140443
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| Publikation (Nr.) |
 EGU/EGU2017-3838.pdf |
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| Zusammenfassung |
| We focus on a possibility of microbes as a tracer for groundwater flow investigation. Some
previous papers showed that the total number of prokaryotes in groundwater has correlation
with depth and geology (Parkes et al., 1994; Griebler et al., 2009; Kato et al., 2012).
However, there are few studies investigating both microbe characteristics and groundwater
flow system. Therefore, we investigated a relationship between the total number of
prokaryotes and age of spring water and groundwater. Intensive field survey was conducted at
four mountainous areas, namely Mt. Fuji (volcano), a headwater at Mt. Setohachi, a
headwater at River Oi and a headwater at River Nagano underlain by volcanic lava at Mt.
Fuji, granite at Mt. Setohachi and sedimentary rock at River Oi and River Nagano. We
collected totally 40 spring water/ groundwater samples in these mountainous areas in
October 2015, August, October and November 2016 and analyzed concentration of
inorganic ions, the stable isotopes of oxygen – 18, deuterium, CFCs and SF6. Also, we
counted prokaryotic cells under the epifluorescence microscopy after fixation and
filteration.
The total number of prokaryotes in the spring water/ groundwater ranged from 1.0×102
to 7.0×103cells mL−1 at the Mt. Fuji, 1.3×104 to 2.7×105cells mL−1 at Mt. Setohachi,
3.1×104cells mL−1 at River Oi and 1.8×105 to 3.2×106cells mL−1 at River Nagano. The
SF6 age of the spring water/ groundwater ranged from 8 to 64 years at Mt. Fuji, 2
to 32.5 years at Mt. Setohachi, 2.5 years at River Oi and 15 to 16 years at River
Nagano.
The total number of prokaryotes showed a clear negative correlation with residence time
of spring water/ groundwater in all regions. Especially the prokaryotes number increased in
the order of 102 cells mL−1 with decreasing of residence time in approximately 10 years in
the groundwater and spring water with the age less than 15 years. |
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