Freshwater

Three plants of an endemic submerged quillwort (Isoëtes) were recovered from Lake Ōmāpere by NIWA in 1998, prior to the lake weed (Egeria densa) dying off and the lake switching into an algal dominated turbid state. No further isoëtes plants have been observed in the lake since that time.

NIWA researchers have produced a series of calendars to inform people when New Zealand's native freshwater and sport fish are migrating and spawning.

NIWA's publication "Freshwater Fish Spawning and Migration Periods" is designed to help people working near freshwater to minimise effects of their work on freshwater fish species.

Now back on dry land, Voyage Leader Richard O'Driscoll reflects on the final days of RV Tangaroa's 2015 Antarctica expedition.

Water in the Blue Lake is the clearest freshwater ever reported.

An international team of scientists has analysed 7000 years’ worth of lake-bottom mud from central Hawke’s Bay to work out how often the region might expect earthquakes.

Te Waihora is a special lake in need of some intensive care. Together, scientists, iwi, locals and environmentalists are pooling their knowledge and resources to make it better.

Kneeling in the mud under the cover of trees, covered in anoraks, sandflies and dedication, three scientists are looking out for the little guy.

New Zealand’s climate is changing – and so are our freshwaters.

NIWA and Auckland Council freshwater scientists using fish pheromone samplers have made a rare discovery in two Auckland streams.

CHES (Cumulative Hydrological Effects Simulator) software tool predicts how water flows in a catchment will change with multiple water uses (e.g. direct abstractions or storage reservoirs) and what the consequences will be to in-stream ecosystems and reliability of water-take.