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Oceanography and the Distribution of Pelagic Larvae around Banks Peninsula
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Research
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We
are working oceanographers at the National Institute of Water and Atmospheric
Research (NIWA) in order to examine how plankton behaves in relation to
tidal cycle, time of day, chlorophyll a, temperature, and oceanographic
events such as upwelling and downwelling. The oragnisms we are studying
include the pelagic larvae of barnacles (nauplii and cyprids), crabs (zoae
and megalopae), gastropods (veliger stage), and mussels (Atrina, Mytilus,
Perna, Aulacomya and Xenostrobus species)
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The pelagic nauplii
stage of a barnacle |
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In this picture
we are deploying drogues, oceanographic intruments that have an underwater
'sail' which allows them to float with the currents. Drogues record their
position, as well as abiotic factors such as temperature and salinity. This
was part of a 24-hour diel study that tracked the movement of larvae in
the neuston.
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We are also seeking to describe the
large scale drivers and their variability along coastal regions of New
Zealand, including regional-scale currents, sea surface temperature
variation (SST) and waves. This is through a variety of methods including
remote sensing, modelling and direct observation process studies.
Rickard
animation of modelled SST off Kaikoura coast
avi file (3mb) "Graham Rickard
– NIWA"
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