This research investigates the diversity and behaviour of zooplankton around Rangitāhua, Aotearoa New Zealand. By combining microscopy and underwater acoustics, it identifies species and tracks their daily vertical migrations. The findings will improve understanding of marine ecosystems, climate change impacts, and support Ngāti Kuri's stewardship of this culturally significant region.

The Mississippi River relies on dams for commercial navigation, but these structures block fish migration and damage ecosystems and local fishing economies. This research uses hydrodynamic modelling to test fish-passage designs, such as bypass channels, showing how they can reconnect habitats, support biodiversity, and allow economic and ecological goals to coexist.