Restoring the mauri of limestone ecosystems

Waitaki valley limestone sites have been identified as ideal candidates for large-scale ecosystem restoration because of their remaining ecological values, ongoing work by DOC at two conservation reserves (Wai o Toura/Gards Road Scenic Reserve and Waipata/Earthquakes Scientific Reserve) and standing collaboration with mana whenua. 

Stage 1:

Landscape-scale restoration of the Wai o Toura Scenic Reserve limestone ecosystem 

Proof of concept demonstration to restore rare limestone ecosystems and their biodiversity, protecting over six highly threatened plant species and many other native plants and animals that are at risk and dependent on the limestone ecosystem.  

If successful, it provides a best-practice guidance for other limestone ecosystem restoration. 

1. Resettling the ecosystem $569,250

Site preparation such as the mechanical removal of weeds and associated above-and below-ground biomass to provide space and opportunity for native species

$221,375 per year across years 1 and 2 $25,300 per year across years 3-5

2. Restore through reforestation $632,500

Purchasing and planting trees and shrubs to restore a forest belt that will provide a buffer for extreme weather events and weed invasion.

$259,325 year 2 $215,050 year 3 $158,125 year 4

3. Bringing endemic plant species back to the ecosystem $63,250

Threatened plant nursery operations – seed collection, nursery propagation, and the translocation of threatened limestone plants into restored habitats.

$12,650 per year across years 1-5

4. Maintain gains $178,250

Ongoing outcome monitoring and weed control, preventing weed (re)invasion so native species can thrive.

$11,500 per year across years 1-5 $12,075 per year across years 6-15

$1,443,250 investment required over 5 years