wetlands

The global Human Footprint Map is a measure of human pressures on the environment that has been linked to changes in species extinction risks and the loss of intact ecosystems. Previous work assessed the utility of downscaling the global map to more precise regional scales using a 90 m resolution, and found that doing so supported conservation-based land-use planning. We created a New Zealand human pressure layer in a resolution (100 m) and projection (New Zealand Transverse Mercator 2000) suitable for national-scale analysis for the years 2012 and 2018.

We produced the first national-scale quantitative classification of non-forest vegetation types, including shrubland, based on vegetation plot data from the National Vegetation Survey Databank. Semi-supervised clustering with the fuzzy classification algorithm Noise Clustering was used to incorporate these new data into a pre-existing quantitative classification of New Zealand’s woody vegetation.

This is a preliminary account of the wetlands near Lakes Manapouri and Te Anau, New Zealand. It discusses briefly the vegetational history of the area and describes the general nature and vegetation of certain of the mires

The impact of discharging an oxidation pond effluent into a wetland in the Waitangi Forest (Northland) was assessed by comparing the water, soil, and vegetation of this wetland (the sewage wetland) with that of an adjacent wetland not receiving effluent (the reference wetland). The hydroperiod of the two wetlands differs markedly with the sewage wetland now permanently flooded whereas the reference wetland is subject to summer drawdown. Marked differences were found in gross chemical indicators such as pH and redox potential between the soils of the 2 wetlands.