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FACULTY
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Brian W. Teasdale
Assistant Professor
Education
B.S., University of
Kansas
M.S., University of South Florida
Ph.D. in Plant Biology, University of New Hampshire
Areas
of Expertise
Botany, Marine Botany,
Molecular Systematics and
Evolution, Marine Phycology, Microscopy, Microbiology
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Dr. Brian W. Teasdale
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Bio
and Research
My research has primarily been on the molecular
systematics and ultrastructural characteristics of economically
valuable red
seaweeds (Rhodophyta). Other interests include endosymbiosis,
evolution, and
population genetics. My current
research has been the phylogeographic analysis of the cosmopolitan
North
Atlantic species Porphyra umbilicalis Kutzing.
Interpretation
of Paleoclimate records leads to the supposition that glacial processes
repeatedly eradicated Northwest Atlantic temperate marine organisms
during the
Pleistocene (Van den Hoek 1975, Wares & Cunningham 2001). It is
further
hypothesized that since the last Glacial Maximum (21,000 YBP) the
Northwest
Atlantic coast was repopulated by vicariant events from European
populations
(Van den Hoek 1975). I (unpubl. obs.) have compared sequence variation
in ITS
for thirty accessions of P. umbilicalis (see figure 2):
Northwest
Atlantic samples covering most of the latitudinal range of the species
and
samples from the Northeast Atlantic, ranging from the Baltic Ocean to
as far
south as Portugal. There is less intraspecific sequence variation
within P.
umbilicalis ITS (0-2.5%) than observed for P. suborbiculata
(0-5.4%). (Broom et al. 2002) or P. yezoensis (0-4%; (Kunimoto
et al.
1999). The phylogeographic pattern observed for P. umbilicalis
is
consistent with a mixture of vicariant and dispersal processes sensu
Templeton
and colleagues (1995). |
Teaching
BLY204 Botany
BLY301 Microbiology
BLY312 Plant Taxonomy
MSC407 Marine Botany
BLY499 Senior Seminar
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Contact Information
Office: Reid 114
Phone: (904) 256-7319
E-mail: bteasda@ju.edu
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