stones & stems

where water runs 1
fresh 2 & clear 3

streams and rivers are never pure

the chemical composition of the river
sets the parameters for aquatic life

3 clean water is regarded as having very low levels
of chemicals or sediments originating from human activity


a refuge 4
of bark & leaves 5

4 in the UK very few ecosystems are completely
unimpacted by human activity (arguably none at all)

5 fallen leaves in the water from trees along the river banks
provide essential food and resources for ecosystems

a portable shelter 6
camouflage cocoon

6 the concept of a healthy ecosystem
is quite an elusive one



your surroundings 7

your surroundings

7 there are no unambiguous measures of what
an environment should be like