More Concerns About Spread of Marine Invasive Species from Sandspit During Marina Construction

Jon Nicholson from the Sandspit Yacht Club Marina Society has assured us that the various marine invasive species found at Sandspit within the proposed marina footprint will not be spread by dumping the dredged spoil at sea because of the technique they intend to use for dealing with the dredged material (Mahurangi Matters, 19 March 2014, page 7).

Figure 1.  Large quantities of highly invasive Australian droplet tunicate festoon the low tide and shallow sandstone reef in the Sandspit estuary, including the footprint of the proposed marina.  Although tunicates may be killed in the stockpiling and draining process before dredgings are shipped to Great Barrier island, there is still a huge risk of larvae settling on the bottom of the barges themselves while being loaded at Sandspit.  Tunicates attached to the barges would then release larvae all the way across the Hauraki Gulf to the dump site and return. (Photo: 8 April 2014).

Figure 1. Large quantities of highly invasive Australian droplet tunicate festoon the low tide and shallow sandstone reef in the Sandspit estuary, including the footprint of the proposed marina. Although tunicates may be killed in the stockpiling and draining process before dredgings are shipped to Great Barrier island, there is still a huge risk of larvae settling on the bottom of the barges themselves while being loaded at Sandspit. Tunicates attached to the barges would then release larvae all the way across the Hauraki Gulf to the dump site and return. (Photo: 8 April 2014).

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Progress Toward Marine Spatial Plan for the Hauraki Gulf

Hauraki Gulf

Kawau Island – Hauraki Gulf

Following the official  launch of “Sea Change”, the Marine Spatial Planning process proposed for the Hauraki Gulf, at the Hauraki Gulf Forum seminar at the Auckland Museum on 9th September 2013, further progress has been made.

A meeting at the Auckland Museum on Friday 11th October collected a very diverse group of marine-oriented individuals and organizations together in one room.  There were roughly 200 people there.  The day was focused mainly on getting started on procedures to end up with who is on the Stakeholder Working Group, which is really the grass-roots part of the project where individuals and groups effectively produce the plan.

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Krill Invasion in Whangateau Harbour

Krill Invasion

Krill Invasion

Millions of krill, tiny crustaceans important in the marine food chain, have appeared washed up along the sandy harbour shore north of the Omaha boat ramp and jetty.
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