he dunelands of the Manawatu are certainly
distinctive and some of the most representative of these can be reached via Scotts Ferry,
about 19 kilometres south-west of Bulls. These dunes are among the most exacting
environments to be found anywhere in this country, with dessicating winds and
temperatures, drifting sands, and low nutrient levels.
In response to duneland conditions, a small group of highly specialised
plants has evolved, of which pingao, an endemic sedge, and spinifex, a grass, are the most
widespread. Spinifex is found on most beaches in the North Island and in the top half of
the South Island, while pingao extends from North Cape to Stewart Island and the Chathams.
Pingao's graceful orange-green leaves make it one of the dunelands' most colourful plants
and it was much used by the Maori for weaving. Despite its range, pingao is now under
threat from the planting of exotic plants such as marram grass and tree lupin, both of
which consolidate sand and destroy the shifting sands pingao favours. Other duneland
plants are less common and some of them are becoming scarce. Among these are the shore
milkweed, the sand daphne and two ranunculi.
Any developed areas of the dune country are home to a surprisingly wide
range of fauna, both native and exotic. Even the kereru relishes the protein-rich leaves
of the nitrogen-fixing legumes. Swamps, lakes, scrub and open pastureland are all found
here, along with sizeable stands of trees, and each of these habitats supports its own
particular communities. Exotic birds flourish as do their enemies - rats, stoats and
weasels.
In the winter great flocks of finches inhabit the dunelands and feast
on seeds. It is not altogether surprising that the decline of the kakariki and the
extinction of the native quail (koreke), was accelerated by the introduction of these
birds and their competition for food. The native insect-eaters are doing better against
the foreign competition with large populations of warblers, fantails, kingfishers, pipits
and even fembirds to be seen.
Waterbirds are in their element in the chain of lakes and ponds in the
hinterland of the dunes. Dabchicks and a wide range of ducks, including the scarce grey
teals, can be found, together with herons, rails and a number of waders. Brown teal were
once found here as well but have now disappeared, possibly because their habit of walking
from the ponds or streams to their nesting sites left clear tracks for predators to
follow.