[Parameters: Topic='BIOSPHERE', Term='VEGETATION', Variable_Level_1='NUTRIENTS']
Impacts of climate change on Antarctic vascular plants: warming and UV-B radiationEntry ID: TAD001
Abstract: Our research examined the influence of ultraviolet-B radiation
(UV-B) and warming on the performance of Antarctic flowering plants
(i.e. Deschampsia antarctica, Antarctic hairgrass and Colobanthus quitensis,
Antarctic pearlwort). Our research endeavors fell into the following
1) ... We conducted a long-term field experiment at Stepping
Stones, near Palmer Station, in which we reduced levels of UV
radiation and raised air temperatures around naturally growing
Deschampsia antarctica and Colobanthus quitensis plants for four
consecutive growing seasons. We examined plant responses to
these manipulations by assessing photosynthesis, vegetative growth,
cover, and sexual reproduction. At the end of this
experiment, we collected plant, soil and litter samples, and
examined treatment effects on plant biomass production, litter
accumulation, soil properties, and microarthropod populations.
2) Single growing-season experiments were also conducted
at Stepping Stones, primarily aimed at examining the influence of
UV-B radiation on plant growth processes and concentrations of
UV-screening compounds in leaves, and soil seed banks.
3) We also conducted a more intensive short-term experiment at
Palmer Station, in which we placed potted plants under UV-B transparent
or UV-B absorbing filters from November through late December,
corresponding to the ozone depletion/enhanced UV-B season.
We assessed the influence of ambient UV-B during the ozone depletion
period by examining UV-screening compound concentrations, and
rates of photosynthesis, plant growth and DNA damage.
4) To quantify the short-term UV-B responses of these species
under more controlled conditions, we examined the UV dose response
of DNA damage and screening compound concentrations in these species
in growth chamber studies at our home institution.
5) We examined the temperature response of antarctic plants,
by characterizing the photosynthetic and respiratory responses
of naturally growing plants to temperature at Palmer Station.
We also characterized their long-term, or acclimation, responses
to rising temperatures, in terms of photosynthesis, respiration and growth,
in a series of growth chamber experiments.
Data Set Citation
Dataset Originator/Creator: Day, T.A.
Dataset Title: Impacts of climate change on Antarctic vascular plants: warming and UV-B radiation
Dataset Publisher: Department of Plant Biology, Arizona State University
ATMOSPHERE > ATMOSPHERIC RADIATION > ULTRAVIOLET RADIATION
BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA
BIOSPHERE > TERRESTRIAL ECOSYSTEMS > ISLANDS
BIOSPHERE > VEGETATION > BIOMASS
BIOSPHERE > VEGETATION > CARBON
BIOSPHERE > VEGETATION > CHLOROPHYLL
BIOSPHERE > VEGETATION > LEAF CHARACTERISTICS
BIOSPHERE > VEGETATION > LITTER CHARACTERISTICS
BIOSPHERE > VEGETATION > NUTRIENTS
BIOSPHERE > VEGETATION > PHOTOSYNTHETICALLY ACTIVE RADIATION
BIOSPHERE > VEGETATION > PIGMENTS
BIOSPHERE > VEGETATION > VEGETATION COVER
LAND SURFACE > SOILS > NITROGEN
LAND SURFACE > SOILS > PHOSPHORUS
LAND SURFACE > SOILS > SOIL DEPTH
LAND SURFACE > SOILS > SOIL RESPIRATION
LAND SURFACE > SOILS > SOIL TEXTURE
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > HEXAPODS > INSECTS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS
BIOLOGICAL CLASSIFICATION > PLANTS > ANGIOSPERMS (FLOWERING PLANTS)
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SPECIES COMPETITION
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > EVOLUTIONARY ADAPTATION
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > RANGE CHANGES
BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > POPULATION DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > SPECIES RECRUITMENT
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > NUTRIENT CYCLING
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PHOTOSYNTHESIS
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > DECOMPOSITION
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PRIMARY PRODUCTION
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > RESPIRATION RATE
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > TROPHIC DYNAMICS
Role: DIF AUTHOR
Email: tadday at asu.edu
Department of Plant Biology Life Sciences E-218 PO Box 871601 Arizona State University
Province or State: AZ
Postal Code: 85287-1601
Grobe, CW, CT Ruhland & TA Day. 1997. A new population of the
vascular plant Colobanthus quitensis (Kunth) Bartl. at Arthur Harbor,
Antarctic Peninsula: correlating recruitment with warmer summer air
temperatures. Arctic and Alpine Research 29:217-221.
McGraw, JB & TA Day. 1997. Size and characterization of ... a natural seed
bank in Antarctica. Arctic and Alpine Research 29:213-216.
Day, TA, CT Ruhland, CW Grobe & F Xiong. 1999. Growth and reproduction
of Antarctic vascular plants in response to warming and UV-B radiation
reductions in the field. Oecologia 119:24-35.
Xiong, F, CT Ruhland & TA Day. 1999. Photosynthetic temperature
response of the Antarctic vascular plants Colobanthus quitensis and
Deschampsia antarctica. Physiologia Plantarum 106:276-286.
Xiong, F, EC Mueller & TA Day. 2000. Photosynthetic and respiratory
acclimation and growth response of Antarctic vascular plants to contrasting
temperature regimes. American Journal of Botany 87:700-710.
Ruhland, CT & TA Day. 2000. Effects of ultraviolet-B radiation on
leaf elongation, production and phenylpropanoid concentrations of
Deschampsia antarctica and Colobanthus quitensis in Antarctica.
Physiologia Plantarum 109:244-251.
Xiong, F & TA Day. 2001. Effect of solar ultraviolet-B radiation during
springtime ozone depletion on photosynthesis and biomass production
of Antarctic vascular plants. Plant Physiology 125:738-751.
Ruhland, CT & TA Day. 2001. Size and longevity of seedbanks in
Antarctica and the influence of ultraviolet-B radiation on survivorship,
growth and pigment concentrations of Colobanthus quitensis seedlings.
Environmental and Experimental Botany 45:143-154.
Day, TA, CT Ruhland, & F Xiong. 2001. Influence of solar ultraviolet-B
radiation on Antarctic terrestrial plants: results from a 4-year field study.
Journal of Photochemistry and Photobiology B: Biology 62:78-87.
Day, TA. 2001. Multiple trophic levels in UV-B assessments - completing the
ecosystem. New Phytologist 152:183-186.
Convey, P, PJA Pugh, C Jackson, AW Murray, CT Ruhland, FS Xiong
& TA Day. 2002. Response of Antarctic terrestrial microarthropods to
multifactorial climate manipulation over a four year
period. Ecology, in press.
Xiong, FS, Ruhland, CT & TA Day. 2002. Effect of ultraviolet-B radiation
on growth of Colobanthus quitensis at Palmer Station, Antarctica.
Global Change Biology, in press.
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Creation and Review Dates
DIF Creation Date: 2002-05-09
Last DIF Revision Date: 2016-01-27