Environmental Geology & Geochemistry Seminar (EGGS)

Thu, Sep 16, 2021, 12:30 pm to 1:30 pm

Abstract
Relationships between body size and temperature are widely observed in laboratory experiments and the geological record of marine species, but a predictive theory is lacking. We derive a mechanistic model to predict this ‘Temperature Size Rule’ from organismal O_2 supply and demand across the range of ocean temperatures and body sizes. The model predicts a magnitude and variability of inter-generational size reductions consistent with laboratory experiments and fossil evidence of diverse aquatic species, supporting O_2 limitation as the underlying mechanism. Stronger temperature-size responses among larger species arise from convergent trends in allometric dependence of metabolic rate and diffusive O_2 supply, consistent with both theoretical scaling and measured species traits across the size spectrum from microbes to macrofauna. Without rapid physiological adaptation, accelerating ocean warming and O_2 loss in this century will cause >20% reductions in the body mass of the smallest animal species, with larger and more variable shrinkage at higher trophic levels, compounding the direct impact of human harvesting on size-structured ocean food webs.

Location: 
Guyot 220 & via Zoom
Speaker(s): 

Upcoming Events

Environmental Geology & Geochemistry Seminar (EGGS)

Thu, Sep 30, 2021, 12:30 pm to 1:30 pm
Location: Guyot 220 & Zoom
Speaker(s):

GEO Solid Earth Brown Bag

Fri, Oct 1, 2021, 12:00 pm to 1:00 pm

Melinda Rucks of the Duffy lab will be speaking Friday (Oct 1st) at noon in Guyot 10 as part of GEO's weekly Brown Bag seminar series.

Location: Guyot 10 & Zoom
Speaker(s):

David Bradford Energy and Environmental Policy Seminar Series

Mon, Oct 4, 2021, 12:15 pm to 1:15 pm

Eric Tate is an Associate Professor at the University of Iowa, in the Department of Geographical and Sustainability Sciences.

Location: Virtual
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AOS/GEO/HMEI Climate Seminar

Mon, Oct 4, 2021, 4:00 pm to 5:00 pm
Location: Virtual
Speaker(s):

HMEI Faculty Seminar

Tue, Oct 5, 2021, 12:30 pm to 1:30 pm
Location: Venue and viewing location are forthcoming.
Speaker(s):

Environmental Geology & Geochemistry Seminar (EGGS)

Thu, Oct 7, 2021, 12:30 pm to 1:30 pm
Location: Virtual
Speaker(s):

GEO Solid Earth Brown Bag

Fri, Oct 8, 2021, 12:00 pm to 1:00 pm
Location: Guyot 10
Speaker(s):

David Bradford Energy and Environmental Policy Seminar Series

Mon, Oct 11, 2021, 12:15 pm to 1:15 pm

Dr. Narasimha Rao is an associate professor of Energy systems at the Yale school of the Environment.

Location: Virtual
Speaker(s):

AOS/GEO/HMEI Climate Seminar

Mon, Oct 11, 2021, 4:00 pm to 5:00 pm
Location: Guyot 220
Speaker(s):

GEO Department Seminar

Tue, Oct 12, 2021, 12:30 pm to 1:30 pm
Location: Guyot 10
Speaker(s):