Doctoral student, Michele Melchior, has made an important breakthrough in the effort to save New Zealand's freshwater mussels, or kākahi.
Kākahi were once a valuable food source for Māori, and they also play a crucial role as indicators of the health of waterways. All three kakahi species in New Zealand are in decline.
NIWA is working with DairyNZ, Regional Councils and farmers on a new project to evaluate riparian planting options that have economic as well as environmental benefits. The project is co-funded by the Sustainable Farming Fund. Read the article Research into productive riparian buffers on the DairyNZ website, or contact Dr Fleur Matheson.
The diatom (Lindavia intermedia) that causes lake snow—nuisance slime in clean-water lakes that ruins angling and can block water intakes—was apparently introduced to New Zealand shortly before 2002, but was widespread by 2005. To obtain a clearer picture of when this diatom arrived in New Zealand, Otago Regional Council (ORC) commissioned NIWA to search archived diatom data and collections.