We wish to encourage abstract submissions to Special Session SS38 "Use of
Natural Abundance 14C in Aquatic Food Web and Ecosystem Studies" at the
upcoming ASLO 2016 Summer Meeting in Santa Fe, New Mexico. Note that this
session will cover all aquatic environments, including freshwater, estuarine
and marine systems.

Session description:

Natural abundance stable isotopes (13C, 15N, 2H) have been used in many
studies assessing aquatic food web structure and contributions of different
sources of organic matter (OM) to consumers. However, while natural
abundance radiocarbon (14C) has historically been used far less often in
these types of studies, its use has been increasing due to advances in
sampling and analytical methods. Natural 14C has many advantages over
natural abundance stable isotopes. It has a greater dynamic range than
stable isotopes, resulting in greater sensitivity in studies of consumers
and their dietary sources. Additionally, use of natural 14C also allows for
estimates of the age(s) of carbon and OM assimilated by consumers. Use of a
multi-isotope approach, including radiocarbon, should allow for even greater
differentiation between potential dietary sources. Assessing the age of OM
utilized by aquatic consumers is also important as climate change and human
landscape disturbance increases the mobility of OM of different ages from
riparian systems and watersheds. This session will include recent and
current research that incorporates natural abundance 14C for assessing the
sources and ages of carbon and OM pools supporting aquatic consumers and

We look forward to seeing you at the meeting-

Amber Bellamy and Jim Bauer, session co-conveners
Aquatic Biogeochemistry Laboratory
Department of Evolution, Ecology and Organismal Biology
The Ohio State University
email: [log in to unmask]