Upload
audrey-jennings
View
219
Download
0
Tags:
Embed Size (px)
Citation preview
The Effects of Elevated The Effects of Elevated Carbon Dioxide on Carbon Dioxide on MicroarthropodsMicroarthropods
Jarret M. Childers. Undergraduate at Jarret M. Childers. Undergraduate at Northern Arizona University. Northern Arizona University.
Environmental Science: Management.Environmental Science: Management.
Carbon DioxideCarbon Dioxide
Carbon dioxide (COCarbon dioxide (CO22) emitted from use of ) emitted from use of fossil fuelsfossil fuels
Large player in Large player in climate change climate change
Emissions expected Emissions expected to continueto continue
Varied impacts Varied impacts on ecosystemson ecosystems
http://probaway.files.wordpress.com/2008/02/mauna_loa_carbon_dioxide.png
MicroarthropodsMicroarthropods
Very small yet importantVery small yet important Nutrient cyclesNutrient cycles Decomposition cyclesDecomposition cycles
Extremely abundantExtremely abundant
Dependent on other parts of systemDependent on other parts of system Roots, fungi, limiting nutrientsRoots, fungi, limiting nutrients
Photo by Dr. Bruce Hungate
1mm
Study SiteStudy Site
Merrit Island National Wildlife Refuge, FLMerrit Island National Wildlife Refuge, FL 16 chambers; 8 ambient (378ppm) and 8 16 chambers; 8 ambient (378ppm) and 8
elevated (796ppm)elevated (796ppm) Post fire (regeneration)Post fire (regeneration) Heavily studiedHeavily studied
General increase in General increase in plant productivityplant productivity
Low nutrientsLow nutrients Adverse and Adverse and
extreme conditionsextreme conditions
http://pics2.city-data.com/city/maps/fr987.png
Photo by Dr. Bruce Hungate
HypothesisHypothesis
Microarthropod abundance Microarthropod abundance
will increase when exposed will increase when exposed
to elevated COto elevated CO2 2
With increase inWith increase in
plant productivityplant productivity
Laboratory MethodsLaboratory Methods
Dissecting microscope Dissecting microscope Sort thousands ofSort thousands of
microarthropodsmicroarthropods Very time consumingVery time consuming
Statistical analysisStatistical analysis One way ANOVAOne way ANOVA
ResultsResults
Data indicate no major influence of COData indicate no major influence of CO22
p= 0.84
Soil
ResultsResults
Photo by Dr. Bruce Hungate
Soil
ResultsResults
Arthropod abundance highest in litter andArthropod abundance highest in litter andtop soil layer (0-10cm)top soil layer (0-10cm)
DiscussionDiscussion
What are other factorsWhat are other factors RootsRoots Soil FungiSoil Fungi Environmental factorsEnvironmental factors
Sampling Sampling
Continuation of projectContinuation of project Other studies in different ecosystemsOther studies in different ecosystems
http://www.energybulletin.net/image/uploads/23428/SBPfoodwebWords.jpg
AcknowledgementsAcknowledgements
Dr. Catherine GehringDr. Catherine Gehring
Todd WojtowiczTodd Wojtowicz
Dr. Bruce HungateDr. Bruce Hungate
NASA Space Grant ProgramNASA Space Grant Program
Questions/Comments?Questions/Comments?
http://www.toonsart.co.uk/aspx/dbImage.aspx?blobId=722