The scientists collected seawater from various depths and measured the ratios of certain
oxygen and nitrogen isotopes in the samples.
Phytoplankton prefer to consume nitrate with lighter
oxygen and nitrogen isotopes, so they leave behind heavier isotopes; measuring these can reveal microbial activity in the environment.
Not exact matches
In the study, the researchers examined
nitrogen and oxygen isotopes in N2O samples collected from permafrost peatland sites in northwestern Russia.
I joined the team
and undertook isotopic work using
oxygen,
nitrogen and carbon stable
isotopes to assess his geographical origin
and also his diet.
What's Next: The team also is developing techniques that would work with other
isotopes, including
nitrogen and oxygen.
Isotope measurements that relate to geographical location, pollution
and diet (strontium,
nitrogen,
oxygen, carbon
and lead) were analysed in three locations on the skeleton of Richard III.
However, when measuring the
isotopes in nitrate alone, the team found an unexpected imbalance in the ratio of heavy
nitrogen and oxygen.
Alternative research shows how
isotopes of
oxygen can illustrate water sources
and nitrogen isotopes can show up the protein source.