Rachel Presley
Lehi, Utah, United States of
America
9 Years Experience
PhD Candidate, University of Maine Darling
Marine Center
Education
University of Maine
PhD in Chemical
Oceanography, Oceanography
Experience
University of Maine
Graduate Student
Researcher / August, 2017 —
Present
Research Expertise
nitrogen biogeochemistry
nitrogen fixation
denitrification
dnra
anammox
And 3 more
About
# MY RESEARCH INTERESTS I am
interested in biogeochemical cycling
within marine sediments and the
overlying water column, marine botany,
and marine microbiology. For my
doctoral dissertation, I studied the
balance between competing nitrate
reduction processes (denitrification,
dnra, and anammox) in anoxic marine
sediments using sediment thin disc
experiments. As part of this work, I
used molecular techniques to examine
how microbial communities changed
after the experiments and differed
between treatments. In addition to
this experimental work, I studied the
microbial community composition of
sediments along an estuarine gradient
in the Damariscotta River Estuary
during different seasons. For my
master’s thesis, I studied the
biogeochemistry and microbial
communities associated with nitrogen
fixation in seagrass beds. My thesis
focused on the temporal changes of
biological nitrogen fixation in the
rhizospheres of *Thalassia testudinum*
and *Halodule wrightii* in
Santa Rosa Sound, northwest Florida.
My study included the assessment of
nitrogenase activity, nutrient
availability, and microbial assemblage
using the *nifH* gene. # MY
PASSION I love the natural sciences,
especially biology. Learning the
various mechanisms and processes by
which the natural world functions
fascinates me. I love asking
questions, and I believe that it
facilitates the growth of my
knowledge. During my childhood,
my family and I would often travel to
the Texas coast and visit aquariums.
Even from a young age, I have always
marveled at the wonder and beauty of
the sea. Learning and discovering more
about the ocean increases my interest
and passion for marine science.
# MY BACKGROUND I was born and grew up
in a rural area of northwest Texas.
Until I left to attend the University
of Texas at Austin to obtain my
undergraduate degree, I lived on our
family farm that my
great-great-grandparents established
after migrating to America from
Switzerland. As a child, I was
exposed to the wide open spaces of the
Texas prairie. I have always loved the
outdoors and nature. I attribute my
adoration for the natural world to my
upbringing in such a desolate and
rugged place. Growing up, I
learned how to ride horses and raise
cattle. Without the conveniences of an
urban locale, I obtained experience in
building barns and homes and working
on automobiles, amongst other
necessary skills for life on the
plains. I am not afraid to get my
hands dirty nor work hard.