Complete the notes below.
Write ONE WORD ONLY for each answer.

The effects of environmental change on birds

Mercury (Hg)

Highly toxic

Released into the atmosphere from coal

In water it may be consumed by fish

It has also recently been found to affect birds which feed on [1]

Research on effects of mercury or binds

Claire Varian-Ramos is investigating

the effects on birds’ [2] or mental processes, e.g. memory

the effects on bird song (usually learned from a bird’s [3])

Findings

songs learned by birds exposed to mercury are less [4]

this may have a negative effect on birds’ [5]

Lab-based studies

allow more [6] for the experimenter

Implications for humans

Migrating birds such as [7] containing mercury may be eaten by humans

Mercury also causes problems in learning [8]

Mercury in a mother’s body from [9] may affect the unborn child

New regulations for mercury emissions will affect everyone’s energy [10]