Jennifer F. Biddle

The deep biosphere

Microorganisms have been found deep within the Earth and the majority of these microbes are in the marine subsurface. Research has shown many of these deeply buried microbes to be unlike the microbes in surface environments. Much more needs to be known about these organisms, including what they do and how they survive in such extreme conditions. We are working on developing better genomic tools for the study of the subsurface, in addition to continual efforts at cultivating new species.


Deep drill cores are facilitated by the Integrated Ocean Drilling Program, and are usually taken by the R/V Joides Resolution. The Biddle lab has participated in recent expeditions, including Expedtion 339 and Expedition 342, which is featured here:

Microbial Life in Local Marine Sediments

Many local relatives of deep biosphere bacteria, archaea, and fungi are found around Delaware.

Gene expression in the deep biosphere

Gene expression in the deep biosphere

PLoS One

Deep sequencing of subseafloor eukaryotic rRNA reveals active Fungi across marine subsurface provinces.

Featured Faculty

Jennifer Biddle

Jennifer Biddle picture

Associate Professor Marine Biosciences


CEOE School & Departments

School of Marine Science & Policy

Advancing the understanding, stewardship, and conservation of estuarine, coastal, and ocean environments.

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Department of Geological Sciences

Discovering how geological processes have operated over various time scales to create and influence the planet’s surface environments.

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Department of Geography

Investigating the interactions between people and the environment and the processes that explain the location of human and natural phenomena.

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College of Earth, Ocean, and Environment • 111 Robinson Hall • Newark, DE 19716 • USA • Phone: 302-831-2841
Geography: 302-831-2294 • Geology: 302-831-2569 • Marine Science and Policy: 302-645-4212 • E-mail:

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