Date post: | 27-Dec-2015 |
Category: |
Documents |
Upload: | elfrieda-pitts |
View: | 216 times |
Download: | 1 times |
Archipelagos Institute of Marine Conservation
Michael Wiest and Regina Wang
Archipelagos:
- marine conservation institute on a Greek island- about 30 interns at a time from many different countries
What we did in Greece:-Surveys (terrestrial & marine)-Necropsy (golden jackal)-Jackal surveys (Emily’s work)-Wildlife Library
Main Project:-Microplastics!
Terrestrial Surveys: Chameleons!
And: hedgehogs and terrapins
Marine surveys:-Underwater visual census
Awesome Cuttlefish!
And finally:
MICROPLASTICS!!!
What are microplastics?
• Plastic fragments <5mm (>500µm)
• Typically: polypropylene, polyethylene, polystyrene, polyethylene terephthalate, polyvinyl chloride
• plastic resin pellets, plastic products, plastic product fragments, fibres, rubber, Styrofoam, plastic sheets and sponges
Source and prevalence• Macroplastics: fishing
gear, industrial production, littering, and waste effluent
• Microplastics: result from photo, thermo-oxidative, bio, and physical degradation. Chemicals contain them. Shipping
• Found on all 6 continents• Accumulate in high
pressure areas (gyres)
Broader Implications
• Plastics resist biodegradation due to short biological timespan
• Can accumulate in organisms• Microplastics accumulate
Persistent Organic Pollutants (polychlorinated biphenyl, Dichlorodiphenyldichloroethylene (DDT), Biphenol A)
Archipelagos past research• 18 H. forskali and 4 H. tubulosa sampled:– 24 hour sampling period– Plastics found in all samples (max 32 fibres)
• 114 beach sites in 2009, 49 sites in 2011.– Plastics at all sites– Max concentration was 112 fibres/sample
Methodology
• Sediment:– Add saturated NaCl soln. Agitate and let settle– Filter and analyze through microscope.
• Holothurians:– Keep in filtered sea water 24 hrs.– Return to sea. Agitate and filter sea water.
Analyze
Ongoing research• Altered methodology for mass
measurements• Take sediment samples at depth rather than
distance from shore.• Added sampling in proximity of Holothuria
for concentration comparison• Sampling sites on Samos and six sites on
Oinousses• Regina analyzed fish guts to study travel
through trophic levels.
Sediment results
Total plastics at depth Average plastics at depth
Fibe
rs
Fibe
rs
Fibe
rs/g
ram
sed
imen
tHolothuria results
Concentration difference (Holothuria)
Some pictures of fun times!
Some pictures of fun times!
Some pictures of fun times!
Some pictures of fun times!