Farmer investment pays off
Investment by landowners to keep stock and sediment out of the Rangitikei River and its tributaries has been given the big tick from a population of Dwarf Galaxiids, which require healthy streams to survive.
'Persistence of biodiversity in a dryland remnant within an intensified dairy farm landscape', looks at Bankside Scientific Reserve, a small (2.6 ha) remnant in Canterbury surrounded by dairy paddocks.
It still has valuable communities of native species, despite being impacted by nitrate and phosphate encroachment, and habitat fragmentation.
It concludes "it does not appear to be an intractable management issue for the interface between agricultural systems and conservation sites within a dairy landscape mosaic".
One of the study's authors, Professor of Ecology, Nick Dickinson, and other Lincoln scientists have been tasked by Ngāi Tahu Farming and Manawhenua from Tuahuriri Marae, to turn the little triangles of land which irrigators in paddocks cannot reach into an oasis for native plants and animals on Ngāi Tahu's Eyrewell dairy farm.
Professor Dickinson says the study shows there are "means and ways" to restore natural biodiversity into a dairy farming environment, and the Ngai Tāhu Farming project was an example, covering 150ha on 17 reserves, with a similar additional amount of native species being planted on paddock borders and under irrigators.
These create conditions for more than 65 species of plants to regenerate, and also provide corridors for insects and birds between the reserves.
The research hinges on finding the benefits to the farmer of doing this, to encourage more native planting, he says.
