Welcome to Ryder Environmental


Ryder Environmental evolved from Ryder Consulting, a Dunedin company established in 1995.

We provide freshwater, marine, and terrestrial ecological advice to clients throughout New Zealand.


We undertake ecological monitoring, data analysis and review. We provide advice to councils, government agencies, boards of inquiry, the Environment Court and private entities.

Freshwater Ecology

  • Ecosystem monitoring (lakes, reservoirs, wetlands, rivers and streams)
  • Assessments and mitigation strategies relating to  hydro-electric power schemes, irrigation, mining, roading and wind farms
  • Fish passage requirements
  • Resource surveys
  • Water quality assessments of discharges and receiving environments

Marine Ecology

  • Ecosystem monitoring (coastal, foreshore, offshore and ports)
  • Marine water/sediment quality investigations
  • Monitoring and impact assessments of coastal industrial and municipal outfall and storm-water discharges
  • Assessment of shellfish stocks
  • Surveys of effluent plumes
  • Identification of benthic coastal fauna and flora

Terrestrial Ecology

  • Fauna and flora surveys (avifauna, botany, herpetofauna)
  • Habitat mapping
  • Management and mitigation plans

Laboratory Services

  • Biological samples from freshwater and marine environments
  • Algae, cyanobacteria (benthic and planktonic), macroinvertebrate and fish sample processing
  • Chlorophyll a, sediment as organic and/or inorganic fractions, whole effluent toxicity testing
  • We routinely process samples from lakes, reservoirs, rivers and treatment ponds for indicators of health
  • We also liaise between client and chemical laboratories for the processing of water quality samples

Our Team

Greg Ryder
Environmental Scientist, Partner
Mark Sanders
Managing Director & Ecologist, Partner
Ben Ludgate
Environmental Scientist, Partner
Ruth Goldsmith
Environmental Scientist, Partner
Mandy Tocher
Ecologist | Herpetologist, Principal
Deni Murray
Environmental Scientist
Shannon Goodwin
Ecology Technician
Mike Wakelin
Ecology Technician
Brian Stewart
Consultant Environmental Scientist
Christiane Funnell
Financial Administration Manager



Ryder Environmental

195 Rattray Street, Dunedin
PO Box 1023, Dunedin 9054
Phone: 03 477 2119
Email: enquiries@ryderenv.nz