Environmental Geology & Geochemistry Seminar (EGGS) Seminar

Thu, Dec 5, 2019, 12:30 pm to 1:30 pm

Abstract

Bioturbation—sediment mixing by burrowing animals—critically shapes seafloor ecology and sediment properties, as well as global marine biogeochemical cycling. Observation of strong bioturbation-biogeochemical feedbacks in modern marine environments suggests that the evolutionary development of bioturbation should have profoundly impacted contemporaneous biogeochemical (e.g., C, P, O and S) cycling. Stratigraphic archives indicate that the early Paleozoic development of bioturbation was a protracted process, and that the appearance of intensively and deeply mixed sediments lagged significantly behind relatively early advances in infaunal seafloor colonization. However, the precise biogeochemical impact of early Paleozoic bioturbation has remained debated. To further address this question, I use a new, multi-component diagenetic model to explore the relationship between bioturbation, porosity and biogeochemical (e.g., C, P, O and S) cycling. This approach indicates that these relationships are complex and non-linear, and that not only intensity but style of bioturbation (e.g., biodiffusion, bioirrigation and changes in porosity) influence the magnitude of both P recycling and S oxidation.

Location: 
Guyot 220
Speaker(s): 

GFDL Informal Seminar

Thu, Dec 5, 2019, 10:30 am to 11:30 am
Location: GFDL 317

Environmental Geology & Geochemistry Seminar (EGGS) Seminar

Thu, Dec 5, 2019, 12:30 pm to 1:30 pm
Location: Guyot 220

GFDL Formal Seminar

Thu, Dec 5, 2019, 2:00 pm to 3:00 pm
Location: Smagorinsky Seminar Room 209

GEO Solid Earth Brown Bag

Fri, Dec 6, 2019, 12:00 pm to 1:00 pm
Location: Guyot 220

David Bradford Energy and Environmental Policy Seminar

Mon, Dec 9, 2019, 12:15 pm to 1:15 pm
Location: 300 Wallace Hall

Andlinger Center Highlight Seminar

Thu, Dec 12, 2019, 12:30 pm to 1:30 pm
Location: Maeder Hall

Informal Lunchtime Seminar

Mon, Dec 16, 2019, 12:00 pm to 1:00 pm
Location: Sayre Hall Conference Room 312

GFDL Lunchtime Seminar

Wed, Dec 18, 2019, 12:00 pm to 1:00 pm
Location: Smagorinsky Seminar Room 209

GFDL Formal Seminar

Thu, Dec 19, 2019, 2:00 pm to 3:00 pm
Location: Smagorinsky Seminar Room 209

GFDL Lunchtime Seminar

Wed, Jan 8, 2020, 12:00 pm to 1:00 pm
Location: Smagorinsky Seminar Room 209