Earthquakes cause the relocation of spawning habitat on a catchment scale

The story of how whitebait spawning sites shifted to new areas after the Canterbury earthquakes - and became exposed to new vulnerabilities.
This spatial ecology study reveals how and where we can take action to protect them.

Read more here

Evaluation of Christchurch City Council's riparian management trial

Christchurch City Council (CCC) recently changed its riparian vegetation clearance practices for a trial period in the summer of 2016/17. While the trial has wider objectives around improved environmental outcomes, īnanga spawning habitat is directly affected by bank cutting and other forms of vegetation clearance. A survey of īnanga (Galaxias maculatus) spawning habitat was completed in April 2017 to evaluate effects of the trial.

Benefits of the trial included increasing the availability of high quality spawning habitat and the discovery of new spawning sites. The Avon/Ōtākaro supported a relatively high area of occupation (AOO) of spawning sites for a single month in comparison to other years. In the Heathcote/Ōpāwaho spawning was found at new sites including upstream of Opawa Road. However, egg production was relatively low in the Heathcote/Ōpāwaho versus the same month in previous years. This suggests a shift in the month of peak spawning activity or a possible adult population decline and requires consecutive month surveys to confirm the actual trend.

The full report is available on the CCC website here:
Response of īnanga spawning habitat to riparian vegetation management

Floodplain planning - a case study on regeneration oppportunities in a post-disaster setting

We're pleased to announce the findings of a three-part study on ecological 'regeneration' opportunities for the red-zoned lands in Avon / Ōtākaro river corridor. The study was supported by Avon-Ōtākaro Network in collaboration with Avon-Ōtākaro Forest Park and Greening the Red Zone.

This study provides an analysis of considerations for land-use planning (including sea level rise), with a focus on opportunities for ecological restoration and building resilience to climate change.

New spawning sites found in Aromahana Lagoon in Greymouth

Dr. Mike Hickford and I recently visited an community restoration project on Cobden Island in the Grey River and nearby Aromahana Lagoon. Our main goal was to scope out a survey strategy for monitoring īnanga spawning in this area. Time was short but we did manage to find two new spawning sites. 

This is an innovative floodplain restoration project on an impressive scale. Thanks to Henk Stengs at DOC for showing us around!

Read more >>

Resilience research on whitebait featured in UC Chronicle

The September 2016 issue of the Chronicle He Kupu Whakamahara ran a story on our research into the resilience of whitebait spawning sites in Ōtautahi Christchurch following the earthquakes.

Follow the link here to the article online

Some recent publications relating to this work:

• Earthquake effects on spawning sites - download the original report here
• Identifying īnanga spawning sites in plans - short report available here
• Census survey approach to quantifying īnanga spawning habitat New Zealand Journal of Marine and Freshwater Research, 52(2), 284-294.
• Earthquake-induced habitat migration Aquatic Conservation: Marine and Freshwater Ecosystems, 2018; 1-11.

Ngāi Tahu Research Centre seminar: earthquake recovery in Ōtautahi Christchurch watwerways

Results from our research into the effects of the Canterbury earthquakes on īnanga spawning sites in the Avon Heathcote Estuary / Ihutai catchment in Ōtautahi Christchurch. It's a story of the resilience and recovery of an iconic New Zealand species following a major disturbance. Thanks to the Ngāi Tahu Research Centre and UC Audio Visual unit the recent seminar was videoed. View the clip on U-tube here.

New report on earthquake effects

The Waterways Centre for Freshwater Research and the Marine Ecology Research Group are pleased to provide a new report on the distribution of īnanga spawning sites in Ōtautahi Christchurch. Thanks to the Engineering New Zealand / Water NZ Rivers Group for supporting this work.

Highlights include comprehensive information on changes in relation to the Canterbury earthquakes, and a summary of the key implications for waterways management.

Read more here

Comparative study of coastal hydrosystems

Over the 2016 summer we are surveying eight coastal hydrosystems for a comparative study. Four study sites are in Canterbury and four on the West Coast. The study sites have been chosen to represent a range of different rivermouth and estuarine environments and a wide range of data are being collected to characterise each site in ecosystem terms. Look out for more news from these surveys in the coming months.

2015 hottest year on record?

This recent information from NOAA is worth a look. It that shows very warm global conditions have prevailed since January.
 
via GIPHY

Read more about the trend versus historical averages on the Think Progress site here.

And some recent comment on the 10 things you need to know about climate change with implications for New Zealand.

There's a lot going on in the lead-up to the COP21 climate change summit in Paris ... watch this space!

Te Karere Interview: Ngāi Tahu team up with scientists for whitebait restoration project

Following the announcement of funding from the DOC Community Fund Te Karere TVNZ reporters interviewed the Whaka Inaka project team (including Shelley McMurtrie (project lead), Te Marino Lenihan (project partner) and Shane Orchard (project partner) to find out more about the collaboration between Ngai Tahu and Christchurch scientists.

Watch the news video here

Whaka Inaka project gaining media attention

Whaka Inaka: Causing Whitebait is a joint collaboration between EOS Ecology, Ngāi Tahu, and the University of Canterbury (UC). We recently receiving funding from the Department of Conservation Community Fund, and together with support from Brian Mason Trust, and businesses such as Ravensdown the project is getting underway!

Coastal Restoration Trust award

A big thank you to the Dunes Trust  for adding their support to our to our dune management case study.

Visit www.dunestrust.org.nz for more information on conservation and restoration New Zealand’s dune ecosystems.

TVNZ coverage