These data incorporate the results of water quality monitoring carried out for the purpose of creating a calibration data set for establishing diatom species optima with regard to key water quality parameters

Ocean acidification data from 14 sites from coastal New Zealand. Parameters include measured alkalinity, DIC, temperature and salinity, and calculated pH, carbonate ion concentration and aragonite saturation state. Data are available via the NIWA marine data portal website:https://marinedata.niwa.co.nz/nzoa-on?stage=Stage

Over the past 20+ years the Cawthron Institute has accumulated a large store of information on the nation-wide distribution of freshwater invertebrates and algae. This dataset covers 20 years worth of macoinvertebrate and algal samples processed by Cawthron for regional councils State of the Environment monitoring, funded research work, resource compliance monitoring surveys, and assessments of environmental effects.

Samples were collected in a visiting scientist project (W. Vyverman, K. Saabe; University of Ghent, Belgium), within the FRST-funded freshwater biodiversity programme, in early 2001. All samples were benthic grab samples (composites of several subsamples). A comprehensive suite of environmental data (including water chemistry) was collected at the same time. Identifications were done at the University of Ghent, to genus level except for some probably endemic taxa. Voucher slides of each sample are held in the NIWA diatom collection (slide numbers are the same as the siteID).

The New Zealand Freshwater Fish Database (NZFFD) records the occurrence of fish in fresh waters of New Zealand, including major offshore islands. We maintain the database at our Wellington campus. Data stored include the site location, the species present, their abundance and size, as well as information such as the fishing method used and a physical description of the site. The latter includes an assessment of the habitat type, substrate type, available fish cover, catchment vegetation, riparian vegetation, water widths and depths, and some water quality measures.

Macroinvertebrate abundance data from the littoral zone of a number of large New Zealand lakes

These data are derived from diatom samples collected from throughout New Zealand from 1997 to 2004, from a broad range of freshwater habitats, as part of investigations into diversity patterns in freshwater diatoms

Freshwater invertebrates collected semi-quantitatively from wetlands (e.g. bogs, fens, swamps) below an altitude of 250 m, and which are subject to a range of anthropogenic pressures (i.e. relatively pristine to heavily impacted). At the scale of each wetland, environmental information was collected; then, within each wetland an average of 3 (but up to 6) different water bodies (i.e. sites) were sampled with water quality parameters measured at each site; and at each site, two 'replicate' invertebrate samples were collected (i.e. A and B samples).

Comprises over 2,000 invasive plant survey results held by the Department of Conservation, New Zealand herbaria, and regional councils. The Pest Status and Aquatic Weed Risk Assessment Ranking of invasive plant species are also recorded.

These samples were collected from three locations in the Waimakariri River as part of a biodiversity survey. Subsamples were examined at x400 and an assessment made of the relative abundance of the main taxa present, on a scale of 1 (rare) to 8 (dominant). Identifications are to genus level, and to species level for some of the diatoms.