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"Undaria
Gorse of the Sea" earned Emma Grose 2nd place in the Living
World section (yr7-8) and the Best Environmental Exhibit.
Emma is 12 year old from Bohally Intermediate, who first
took an interest in the seaweed when she went looking for
it with her father when it was first noticed in the Marlborough
Sounds. The aim of Emma's project was to find out Undaria's
growth rate and to see if it was effecting other sea life.
First Emma did some research reading about the new Asian
seaweed invader. Then she tagged 10 plants at each of 3
sites and measured the length of the plants every week for
about 8 weeks. From this she was able to calculate the average
growth rate of the plants. At each site Emma also marked
out a 1 metre square quadrates to compare the amount and
variety of other sea life where Undaria was abundant to
Undaria free sites.
Emma learned that as a young small plant
Undaria grows at a rapid rate and reduces the variety of
other species in the same area. She feels the seaweed will
become a big problem in the future. Emma got help from her
father, NIWA and the Department of Conservation. Some help
hints she has for others starting a science investigation
are; "think of original ideas early, make sure you follow
the scientific method, and gather as much data as you can".
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