A CIESE Collaborative Project

Frankfurt International School, Oberursel, Germany

Prediction:

4BN thinks that the invertebrates in our pond will not be exactly the same as in other countries. Some of the creatures may be similar or we may have some of the same creatures, but we do not think they will all be the same.

Location

We went to the pond beside the primary school on 29th April. This is near Hohemark Strasse in Oberursel, Hessen, Deutschland. Our pond is round and it has a drain flowing in to it, and the water flows out into a small stream. There is grass around the edges and a few trees as well. The bottom of the pond is muddy and Rishi and Cat's boot got stuck.

Invertebrate

Sample 1

Amphipods (or scuds)

3

Caddisfly larvae

4

Damselfly nymphs

2

Water fleas

3

Dragonfly nymphs

0

Mayfly nymphs

1

Midge larvae

4

Mosquito larvae

0

Pond snails

3

Worms

0

Other

 

Leech

1

Dead skink (not counted but interesting!)

1

Observation

There are many less creatures this year than in previous years. Altogether we found only 21 living creatures. There are no tadpoles at all. Two students saw a sick frog. We are wondering why there is little life in the pond. Has it been polluted? Has the colder weather this year affected it? Did the amount of snow make a difference? Maybe something is eating everything or there has been a rise in the number of predators which are above the tadpole in the food chain? Maybe they are in the middle of the pond or very deep in the pond and not at the side where we collected the sample.