Hillsdale College
Hillsdale College Biology
student, Carolyn Cizek
examines plankton collected in
a local kettle lake.
A Hillsdale College biology
student collects sediment from
the bottom of a lake using a
dredge sampler.
BIO 364:  Freshwater Biology

Instructor:  Dr. Anthony L. Swinehart

Course Objectives:

•        Familiarize students with the abiotic and biotic characteristics of inland,
freshwater lakes and wetlands.
•        Educate students in the study of lakes and wetlands for the development of
scientific reports and publications.
•        Introduce students to traditional natural history topics including the
collection, identification, preservation, and curation of plant and animal
specimens.
Course Activities
A Hillsdale College biology
student, Tanya Eaton-Fraser,
prepares a plant specimen for
the herbarium.
Hillsdale College biology
student Phil Hall collects water
samples from deep in a kettle
lake with a Van Dorn sampler.
Hillsdale College students
collect a sediment core from a
peat bog in northern Michigan
with a Russian flag sampler.
Hillsdale College biology
students Tom Korte (left) and
Wil Fetters examine
invertebrates collected from a
local lake.
Kingdom Protista
Phylum Protozoa
Survey of the Slayton Arboretum Pond (Fall 2008)
Survey of Lake Baw Beese (Fall 2010)
(Click on any thumbnail for a larger image)
Centropyxis sp.  (Testate
Amoeba)
Kingdom Animalia
Phylum Platyhelminthes
cf. Dalyella sp.  
(Planarian)
Kingdom Animalia
Phylum Annelida
Kingdom Animalia
Phylum Mollusca
Unidentified leech
Physa gyrina (Tadpole
Snail)
Helisoma trivolvis
Vivipara sp. (Live-bearing
Snail)
Kingdom Animalia
Phylum Arthropoda
Class Crustacea
Ostracoda (Seed Shrimp)
Kingdom Animalia
Phylum Arthropoda
Class Insecta
Order Diptera:  
Chironomidae larva
(Midge)
Coleoptera:  Haliplidae
Hemiptera:  
Backswimmer
Diptera:  Ceratopogonidae
(No-see-um)
Odonata:  Zygoptera  
larva (Damselfly)
Odonata:  Anisoptera
larva (Dragonfly)
Hemiptera:  Water
Strider
Kingdom Animalia
Phylum Chordata
Subphyllum Vertebrata
Class Osteichthyes
Umbra limi (Central
Mudminnow)
Kingdom Animalia
Phylum Chordata
Subphyllum Vertebrata
Class Amphibia
Kingdom Animalia
Phylum Chordata
Subphyllum Vertebrata
Class Reptilia
Rana clamitans adult
(Green Frog)
Kingdom Plantae
Lemna minor (Lessor
Duckweed)
Ceratophyllum demersum (Hornwort or Coontail) -
Spine on leaf (right)
Nymphaea tuberosa
(White Water-lily)
Kingdom Protista
Phyla Chlorophyta; Pyrrophyta; Euglenophyta, etc.
Cladophora sp.
(filamentous alga)
Myriophyllum spicatum
(Eurasian Water Milfoil)
Bidens comosus (Beggar's Tick (emergent)):  Left -
plant; right - achene
Chrysemys picta
(Eastern Painted Turtle)
Kingdom Monera
Phylum Cyanophyta
Difflugia sp.  (Testate
Amoeba)
Closterium sp. (Desmid)
Cosmarium sp.
(Desmid)
Staurastrum  sp.
(Desmid). Top view (left),
side view (right).
Scenedesmus
quadricaudus
Pediastrum cf. P.
boryanum
Pediastrum cf. P. duplex
cf. Gymnodinium
(dinoflagellate)
Cladocera (Water Fleas)
Copepoda  (Right:  female
with eggs)
Ephemeroptera larva
(mayfly)
Kingdom Animalia
Phylum Rotifera
Keratella sp.  (Testate
rotifer)
Anabaena with
heterocysts
Ankistrodesmus sp.
Unknown (Xanthophyta?)
Centritractus sp.
Ceratium  (dinoflagellate)
Notemigonus chrysoleucas (Golden Shiner)
Trichoptera larva
(caddisfly (without case))
Spirodela polyrhiza (red-leaf duckweed) -
upper leaves (left); lower leaves (right)
Chelydra serpentina (Snapping Turtle)
Arcella sp.  (Testate
Amoeba)
Oscillatoria
Coleps sp.
Actinosphaeria
Phacus sp.
Trichotria sp. (rotifer)
cf. Gleocystis
Synura sp. (silica-scaled
chrysophyte)
Unidentified filamentous
algae
Cymbella sp. (a diatom)
Kingdom Animalia
Phylum Cnidaria
Chlorohydra viridissima
(green hydra)
Tubifex sp.
Unidentified oligochaete
Unidentified crayfish
Kingdom Fungi
Unidentified aquatic fungus
2008 Field Trip to the
Merry Lea
Environmental
Center of Goshen
College
Visit to the Rieth Village, a
Platinum level LEED
(Leadership in Environmental
Engineering & Design) Certified
education and research facility.
A night hike to Kesling Pond to
collect and ignite "swamp gas".
James Howard (left) and Will
Fetters use a funnel and a
gallon jar to collect methane.
When conducted properly, pure
methane is collected and burns
blue in color.
If oxygen gets into the jar when
collecting, the ignition of the
methane is more explosive and
an orange flame results.
Dr. Swinehart discusses the
constructed wetlands near
Bear Lake.
The constructed wetlands near
Bear Lake.
Using a Russian Peat borer to
take core samples of a
peatland.
The sediment core is revealed
as the borer chamber is opened.
One student proved to be too
heavy for the floating mat of a
bog to support, resulting in wet
and muddy clothes.
Paramecium bursaria
Coleochaete sp.
Stentor *
Volvox *
Placobdella decora * (leech - note red
ventral surface and red dots on dorsal
surface)
Kingdom Animalia
Phylum Arthropoda
Class Arachnida
Unidentified Hydracarina mite*
cf Stenostomum sp.*
Succinea sp. * (terrestrial
on emergent aquatic
vegetation)
* = New taxon added in Fall 2009
Dytiscidae (Coleoptera)*
Hydrophilidae (Coleoptera)*
cf. Navicula*
Giant Water Bug
(Hemiptera)*
Dobsonfly Larva*