New Zealand, or Aotearoa, is a textbook example of why Seacology works on island ecosystems. Many unique species evolved on these islands. But now, mainly because of habitat loss and introduced plants and animals, many of those endemic species are endangered.

This project focuses on restoring habitat around Lake Hayes (Waiwhakaata), on the South Island. It would help return the lake to a healthy state and to bring back native wildlife, especially birds and lizards. (New Zealand has no native terrestrial mammals.) Over the years, an estimated 90% of the wetlands around the lake have been lost. As a result, sediment and nutrients have poured into the lake, causing algal blooms and displacing wildlife.

The key to restoration lies in the creeks that feed the lake. Our project partner, Mana Tāhuna Charitable Trust, and other local organizations have already installed sediment traps, dug out invasive willows, and planted more than 138,000 native plants to restore wetlands and creeks. The results are already evident. The lake had no algal blooms last summer. Plant survival is around 80%, and the plants are now big enough to fruit and go to seed, providing food for native wildlife.

Mana Tāhuna will use a Seacology grant to buy native plants to restore more of Mill Creek, which flows into Lake Hayes. These plants have strong roots that hold the creek banks together and intercept nutrients, keeping them out of the lake.

This project will have significant benefits for wildlife. Mill Creek is a vital spawning ground for declining numbers of native fish species. The restoration will link sections of previously restored creekside, creating a corridor for wildlife. It will provide more food for birds and lizards and lower predator pressure.

Mana Tāhuna is a Māori organization that represents the traditional Māori guardians of the area, and works to preserve the ecological and cultural health of Lake Hayes.