Date post: | 10-May-2015 |
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INLAND SEAS EDUCATION
ASSOCIATION
INLAND SEAS EDUCATION
ASSOCIATION“Protecting the Great Lakes through
Education”Plankton StationPlankton Station
Plankton Station Learning Objectives
1. Identify the collection device used to sample plankton.
2. Define phytoplankton as suspended plants & zooplankton as suspended animals.
3. Recognize plankton as the basis of the aquatic food web.
4. Describe the trophic (feeding) relationships among phytoplankton, zooplankton, & fish.
5. Identify zooplankton seen on the video monitor & record their findings.
Students will be able to:
Plankton
Plankton are microscopic plants & animals that are free-floating or suspended
in the water
Plankton
= Phytoplankton
= Zooplankton
Plant plankton
Animal plankton
Plankton
Plankton are the basis of the aquatic food web
What is a Food Web?
A food web describes the feeding relationships
between different organisms
Feeding Relationships
1. Producers: organisms that produce their own food through photosynthesis using sunlight & nutrients
2. Consumers: organisms that cannot produce their own food (need to consume another organism to obtain energy)
3. Decomposers: organisms that break down organic material
Zooplankton
Large Fish (Piscivores)
The Great Lakes Food Web
SUN
Phytoplankton
Forage Fish
Benthos
Detritus
Contaminants in the Great Lakes Food Web
Source: EPA Great Lakes National Program Office
Bioaccumulation
Bioaccumulation refers to the accumulation of contaminants in the
tissues of organisms
Many contaminants are hydrophobic (they prefer to be in the lipids/fats of an organism rather than in water) & are taken up in the fatty tissues of
organisms
Bioconcentration
Source: EPA Great Lakes National Program Office
Diel vertical migration
Shallow waters at nightDeep waters during the day
…in response to changing light intensity
Why?1.Metabloic advantage2.Predator avoidance
LogisticsCheck to make sure the micro-video system is working
Begin by discussing how the plankton were collected, where plankton fit into the food web, etc.
Students put several drops of the sample on a petri dish (the smaller the better)
Since the boat & plankton are moving & this station is below deck, students may get seasick– Let the lead instructor know & they will take
the student on deck for a break
COPEPODS
CalanoidCopepod
CyclopoidCopepod
Source: NOAA Great Lakes Environmental Research Laboratory
CalanoidCopepod
Cyclopoid Copepods
Sources: NOAA Great Lakes Environmental Research Laboratory
Sources: NOAA Great Lakes Environmental Research Laboratory
HarpacticoidCopepod
Source: USGS Nonindigenous Aquatic Species Database
Copepod nauplius/nauplii
COPEPODS
Copepod nauplius
Source: Micrographia
CLADOCERANS
BosminaDaphni
a
Bosmina
Source: Central Michigan University
Daphnia
Sources: Advancing the Science of Limnology and Oceanography (left); NOAA Great Lakes Environmental Research Laboratory (right)
CLADOCERANS
Chydorus
Chydorus
Source: Central Michigan University
Leptodora
CLADOCERANS
PolyphemusSource: Central Michigan University
ROTIFERS
Asplanchna
Keratella
ColonialRotifer
Asplanchna
Source: Micrographia
Keratella
Source: Advancing the Science of Limnology and Oceanography
Colonial rotifer
MYSIDS
Mysis relicta(opossum shrimp)
Mysis relicta
Source: NOAA Great Lakes Environmental Research Laboratory
EXOTIC SPECIES
Bythotrephes longiramus(spiny water flea)
Source: NOAA Great Lakes Environmental Research Laboratory
Bythotrephes
EXOTIC SPECIES
Cercopagis pengoi(fish hook water flea)
Cercopagis
Bythotrephes
Source: NOAA Great Lakes Environmental Research Laboratory
ZEBRA MUSSELS
Veliger Adult
Source: NOAA Great Lakes Environmental Research Laboratory (right)
Zebra mussel veliger
Source: NOAA Great Lakes Environmental Research Laboratory
Bloody Red ShrimpHemimysis anomala
Source: NOAA Great Lakes Environmental Research Laboratory
Seasonal Succession of Zooplankton Abundance
May June July Aug
Plankton Net30
CA
A
R
The Plankton Station
SourcesAdvancing the Science of Limnology and Oceanography (
http://www.aslo.org/photopost/showgallery.php/cat/518)
Central Michigan University “Zooplankton of the Great Lakes” (www.cst.cmich.edu/users/mcnau1as/zooplankton%20web/index.html)
Micrographia (www.micrographia.com)
National Oceanic and Atmospheric Administration Great Lakes Environmental Research Laboratory (http://www.glerl.noaa.gov/pubs/photogallery/Waterlife/index.html)
United States Environmental Protection Agency Great Lakes National Program Office (www.epa.gov/glnpo/atlas/index.html)
United States Geological Survey Nonindigenous Aquatic Species Database (http://nas.er.usgs.gov/)
All pictures and drawings not cited during the presentation were provided by Inland Seas Education Association. These pictures can be used freely for educational purposes if ISEA is correctly attributed. All commercial use of these pictures is prohibited.