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Introduction
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>Table of Contents
Contents
1. What you can do
2. Water
3. Ecology
4. Amphibians
5. Environmental Issues
6. Keystone species
7. Get Wet!- Field Study Ideas
8. The Zoo Experience
9. Frogs & Friends
10. Case Studies
11. Resources
12. Glossary
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4.1 Those Awesome Amphibians
- To a large degree, geographical distribution depends on the habitat requirements of each species. Although
it can affect their distribution, suitable habitat does not necessarily guarantee that a species will be
present. There is no simple explanation to account for the presence of a species in one wetland and not in
another of similar characteristics. By comparing similar habitats closely, we possibly could infer why such
habitats do not support such species. An interesting observation to bring to the attention of students is the
proximity of these distributions to human habitation. Trends can be established between animal populations in
relation to human encroachment. The impact of human activity usually results in habitat loss, thus resulting in
animal declines.
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4.4 The Making Of A Frog
- The leopard frog's front toes are not webbed, and the hind toes are webbed. This suggests that the hind
feet are used for swimming. The webbing provides a greater surface area to push water.
The answers to the Amphibian Adaptations "fill-in-the-blanks" table can be viewed in this pop-up window (available here if you cannot view pop-up windows).
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4.5 All Things Must Pass
- In Beaker A, the most water moved into the egg from the beaker. The egg became swollen and turgid. The
selectively permeable membrane allows water to pass into the egg. The concentration of water is higher in the
beaker than in the egg.
- In Beaker B, the most water moved into the solution from the egg. The egg became smaller and limp. The
selectively permeable membrane allows only water to pass into the beaker. The concentration of water is higher
in the egg than in the beaker.
- Osmosis occurred. This can be tested by weighing the egg and contents of the beaker before and after the
experiment. In both cases, water passed through the membrane, with the net flow being from a region of high
concentration of water to a region of low concentration of water.
- A major portion of cell mass is water. Water is essential for most living processes to occur. Cells
maintain proper levels of water through osmosis.
- Osmosis occurs through the skin of amphibians.
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4.8 Classing Creatures
- They could include: with or without laces, one particular colour, more than one colour, size, boys or
girls, brand name, etc.
- Classifying is necessary to sort related things into logical groups. When they are sorted, we see
similarities and differences between the groups.
- The newspaper and the telephone book.
4.8 Classing Animals
The answers to the Classing Animals pop-up table can be viewed in this pop-up table (available here if you cannot view pop-up windows).
LIFE IN A WETLAND - CLASSIFICATION
The answers to the Life in a Wetland pop-up table can be viewed in this pop-up table (available here if you cannot view pop-up windows).
ZOO WETLAND SPECIES - CLASSIFICATION
The answers to the Zoo Wetland Species pop-up table can be viewed in this pop-up table (available here if you cannot view pop-up windows).
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4.9 What's In A Name?
- Spotted Salamander - Ambystoma maculatum
- Mudpuppy - Necturus maculosus
- Spring Peeper - Pseudacris crucifer
- Pickerel Frog - Rana palustris
- Eastern Red-backed Salamander - Plethodon cinereus
- Gray Treefrog - Hyla versicolore
- Four-toed Salamander - Hemidactylium scutatum
- Striped Chorus Frog - Pseudacris triseriata
- Green Frog - Rana clamitans
- Northern Two-lined Salamander - Eurycea bislineata
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