Impacts of ungulate browsing on forest understorey recruitment in the Wainuiomata/Orongorongo catchments, Remutaka Range, Wellington

For Greater Wellington Regional Council

Analysed the impacts of browsing by goats and deer (ungulates) on forest understorey recruitment in the Wainuiomata and Orongorongo water collection areas in the Remutaka Range, Wellington. Ungulate impacts on recruitment of palatable seedlings were assessed using data from permanent ungulate browse plots measured between 2002 and 2016.

Long-term vegetation change in the Hutt Water Collection Area, Tararua Range

For Greater Wellington Regional Council

Analysed forest growth and the impacts of browsing by goats and deer on forest understorey regeneration over a forty year period.

Analysis of the effect of ground cover weed removal on forest understorey vegetation

For Department of Conservation

Collaboration with DOC scientist Kate McAlpine investigating whether the removal of ground cover weeds using herbicide increases native forest understorey vegetation.

Human versus digital bird counts

For Department of Conservation

Collaboration with DOC scientist James Griffiths comparing the effectiveness of human five minute counts and digital acoustic recorders in detecting changes in forest bird abundance.

Analysis of vegetation change in the Port Hills, Christchurch

For Environment Canterbury

Christchurch City Council and Environment Canterbury (Canterbury Regional Council) have been measuring permanent vegetation plots in the Port Hills, Christchurch, for ten years. Debra analysed Recce data from these plots to assess changes in vegetation community composition over this period.

Wilding pine experiment in Kaweka Forest Park.
Wilding pine experiment in Kaweka Forest Park.

Statistical analysis of wilding pine control experiment

For Department of Conservation

Collaboration with DOC scientists Kate McAlpine and Clayson Howell, investigating whether seed availability, mammal browsing and wilding pine control methods influence seedling regeneration.

 

 

 

 

P1010586
Wire mesh cages were used to exclude mammals.

Statistical analysis of native succession through ground cover weeds experiment

For Department of Conservation

Collaboration with DOC scientist Kate McAlpine investigating whether seed availability, weed abundance and mammal browsing influence native seedling regeneration.

 

 

 

 

Kereru (New Zealand Pigeon).
Kereru (New Zealand Pigeon).

Estimating kereru home ranges and movements using satellite tracking

For Department of Conservation

Analysed kereru (New Zealand pigeon) movement data collected by Ralph Powlesland and Les Moran using satellite transmitters. Kereru travelled long distances, with several flights between Southland and Stewart Island. Kereru home ranges were much larger than recorded in previous studies using radio transmitters, where birds are often unable to be located.