These two vine species play an important role as "nature's band-aid*". Like many vines, they grow in open and disturbed places such as forest edges, young scrubland, landslide scars and cliff tops. Pōhuehue in particular can grow very densely in these high-light environments and effectively stabilise soil, buffer temperature and humidity, and capture energy in the area. These characteristics act like a "band-aid" by preventing further disturbance (e.g. further soil loss after a landslide) and creating conditions in which other species can establish.
*Quote from ecologist Catherine Beard