Searching for a needle in a haystack - Sampling the ultra-low biomass deep subsurface environment for microbiology from the ultra-deep drillholes in Otaniemi, Finland

Maija Nuppunen-Puputti; Mari Nyyssönen; Hanna Miettinen; Riikka Kietäväinen; Ville V. Nenonen; Ilmo T. Kukkonen; Aino Karjalainen; Jussi Rytkönen; Malin Bomberg

Searching for a needle in a haystack - Sampling the ultra-low biomass deep subsurface environment for microbiology from the ultra-deep drillholes in Otaniemi, Finland

Maija Nuppunen-Puputti
, Mari Nyyssönen
, Hanna Miettinen
, Riikka Kietäväinen
, Ville V. Nenonen
, Ilmo T. Kukkonen
, Aino Karjalainen
, Jussi Rytkönen
, Malin Bomberg

University of Helsinki
University of Helsinki, Department of Geosciences and Geography
St1 Oy
Geological Survey of Finland (GTK)

Research output: Contribution to conference › Conference Poster › Scientific

Original language	English
Publication status	Published - 13 Jan 2026
MoE publication type	Not Eligible
Event	37th Nordic Geological Winter Meeting, NGWM2026: World in Transition - Logomo, Turku, Finland Duration: 13 Jan 2026 → 15 Jan 2026 https://ngwm2026.fi

Conference

Conference	37th Nordic Geological Winter Meeting, NGWM2026
Country/Territory	Finland
City	Turku
Period	13/01/26 → 15/01/26
Internet address	https://ngwm2026.fi

Funding

SA DAFNE

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

deep biosphere
low biomass
ultra deep
drillhole

1 Conference Poster

Searching for a needle in a haystack - Sampling the ultra-low biomass deep subsurface environment for microbiology from the ultra-deep drillholes in Otaniemi, Finland
Nuppunen-Puputti, M., Nyyssönen, M., Miettinen, H., Kietäväinen, R., Nenonen, V. V., Kukkonen, I. T., Karjalainen, A., Rytkönen, J. & Bomberg, M., 13 Jan 2026.
Research output: Contribution to conference › Conference Poster › Scientific

Cite this

Nuppunen-Puputti, M., Nyyssönen, M., Miettinen, H., Kietäväinen, R., Nenonen, V. V., Kukkonen, I. T., Karjalainen, A., Rytkönen, J., & Bomberg, M. (2026). Searching for a needle in a haystack - Sampling the ultra-low biomass deep subsurface environment for microbiology from the ultra-deep drillholes in Otaniemi, Finland. Poster session presented at 37th Nordic Geological Winter Meeting, NGWM2026, Turku, Finland.

@conference{075e8a48750549bca3a47a25ed0df07d,

title = "Searching for a needle in a haystack - Sampling the ultra-low biomass deep subsurface environment for microbiology from the ultra-deep drillholes in Otaniemi, Finland",

keywords = "deep biosphere, low biomass, ultra deep, drillhole",

author = "Maija Nuppunen-Puputti and Mari Nyyss{\"o}nen and Hanna Miettinen and Riikka Kiet{\"a}v{\"a}inen and Nenonen, \{Ville V.\} and Kukkonen, \{Ilmo T.\} and Aino Karjalainen and Jussi Rytk{\"o}nen and Malin Bomberg",

year = "2026",

month = jan,

day = "13",

language = "English",

note = "37th Nordic Geological Winter Meeting, NGWM2026 : World in Transition ; Conference date: 13-01-2026 Through 15-01-2026",

url = "https://ngwm2026.fi",

}

Nuppunen-Puputti, M , Nyyssönen, M, Miettinen, H, Kietäväinen, R, Nenonen, VV, Kukkonen, IT, Karjalainen, A, Rytkönen, J & Bomberg, M 2026, 'Searching for a needle in a haystack - Sampling the ultra-low biomass deep subsurface environment for microbiology from the ultra-deep drillholes in Otaniemi, Finland', 37th Nordic Geological Winter Meeting, NGWM2026, Turku, Finland, 13/01/26 - 15/01/26.

Searching for a needle in a haystack - Sampling the ultra-low biomass deep subsurface environment for microbiology from the ultra-deep drillholes in Otaniemi, Finland. / Nuppunen-Puputti, Maija ; Nyyssönen, Mari; Miettinen, Hanna et al.
2026. Poster session presented at 37th Nordic Geological Winter Meeting, NGWM2026, Turku, Finland.

Research output: Contribution to conference › Conference Poster › Scientific

TY - CONF

T1 - Searching for a needle in a haystack - Sampling the ultra-low biomass deep subsurface environment for microbiology from the ultra-deep drillholes in Otaniemi, Finland

AU - Nuppunen-Puputti, Maija

AU - Nyyssönen, Mari

AU - Miettinen, Hanna

AU - Kietäväinen, Riikka

AU - Nenonen, Ville V.

AU - Kukkonen, Ilmo T.

AU - Karjalainen, Aino

AU - Rytkönen, Jussi

AU - Bomberg, Malin

PY - 2026/1/13

Y1 - 2026/1/13

KW - deep biosphere

KW - low biomass

KW - ultra deep

KW - drillhole

M3 - Conference Poster

T2 - 37th Nordic Geological Winter Meeting, NGWM2026

Y2 - 13 January 2026 through 15 January 2026

ER -