Past and Present Clients

Central Government

Ministry for the Environment
Department of Conservation

Regional Councils

Waikato Regional Council
Environment Southland
Otago Regional Council
Horizons Regional Council
Environment Canterbury
Environment Bay of Plenty
Greater Wellington Regional Council
Hawkes Bay Regional Council
Auckland Council

Science Providers

National Institute of Water and Atmospheric Research
Cawthron Institute

Others

Living Waters Partnership (Department of Conservation & Fonterra)
Friends of Lake Hayes

Examples of Work

Lake Condition and Ecological Assessments

Schallenberg M (2023) Lake Whatihua ecological assessment and recommendations for restoration. Hydrosphere technical report prepared for Auckland Council, Auckland. 41 p.

Schallenberg M, O’Connell-Milne S (2023) Lake Hayes State of the Environment 2023. Hydrosphere technical report prepared for the Friends of Lake Hayes. 60 p.

Schallenberg L, Thomson-Laing G, Kelly D, Pearman JK, Howarth JD, Vandergoes M, Puddick J, Fitzsimons S, Rees A and Wood SA (2023) Insights into the ecological impact of trout introduction in an oligotrophic lake using sedimentary environmental DNA. Metabarcoding and metagenomics, 7: e111467

Schallenberg M, Vermeulen M (2022) Phosphorus and nitrogen budgets for Lake Horowhenua. Hydrosphere Technical report prepared for Horizons Regional Council. 26 p.

Schallenberg M. (2019) Ecological assessment of the Parangarahu Lakes. Hydrosphere report prepared for Greater Wellington Regional Council. Wellington. 32p.

Kelly D, Schallenberg M, Waters S, Shearer K, Peacock L. (2016) A calibrated ecological health assessment for Southland Lakes. Cawthron Report prepared for Environment Southland, Invercargill. 82 p.

Schallenberg M. Kelly D. (2013) Estimates of reference conditions for Southlands shallow, coastal lakes. Hydrosphere Technical Report prepared for Environment Southland, Environment Southland, Invercargill. 68 p.

Schallenberg M, Kelly D. (2012) Ecological condition of six shallow, Southland lakes. Cawthron Institute Report 2198, prepared for Environment Southland. Environment Southland, Invercargill. 53 p.

Science Underpinning Policy

Schallenberg M (2024) A monitoring and management framework for Otago’s intermittently closed estuaries. Hydrosphere report prepared for the Otago Regional Council. Dunedin. 36 p.

Schallenberg M, Schallenberg L. (2023) Drivers of trophic state in the lakes of Wairarapa Moana. Hydrosphere report prepared for Greater Wellington Regional Council. 34p.

Schallenberg M (2023) Policy advice – Freshwater threatened species. Hydrosphere technical report prepared for the Otago Regional Council. Dunedin. 15 p.

Schallenberg M (2023) Otago’s intermittently closed estuaries: a preliminary assessment. Hydrosphere report prepared for the Otago Regional Council. 36 p.

Schallenberg M (2022) Wairarapa Moana: water quality: synthesis of current knowledge and analysis of management options. University of Otago report prepared for the Greater Wellington Regional Council. 45 p.

Schallenberg M, van der Zon K-A (2021) Discussion document: Feasibility of inducing a bottom-up trophic cascade using P-binding agents to control pest fish recruitment in Lake Tomarata. Hydrosphere report prepared to Auckland Regional Council. 27 p.

Schallenberg M, van der Zon K-A (2021) Optimisation of sampling effort for state of the environment monitoring of Lake Ellesmere/Te Waihora. Hydrosphere report prepared for Environment Canterbury. 68 p.

Freshwater Leaders Group (2019) Report of the Freshwater Leaders Group to the Minister for the Environment. Ministry for the Environment. Wellington. 27p.

Science and Technical Advisory Group (2019) Freshwater Science and Technical Advisory Group report to the Minister for the Environment. Ministry for the Environment, Wellington. 58p.

Schallenberg M, Schallenberg L. (2018) LakeSPI critical appraisal for monitoring Waikato Lakes. Hydrosphere report prepared for Waikato Regional Council, Hamilton. 47p.

Schallenberg M, Schallenberg, L. (2017) Lake Hayes Restoration and Monitoring Plan . Hydrosphere report prepared for the Friends of Lake Hayes Society, Queenstown. 55p.

Hamill KD, Kelly D, Hamilton D, Howard-Williams C, Phillips J, Robertson B, Schallenberg M, Vant B, Ward N. (2014) Attributes for intermittently closed and open lakes and lagoons (ICOLLs) applicable to the National Objectives Framework for freshwater. Report prepared for the Ministry for the Environment. Ministry for the Environment. Wellington. 43 p.

Schallenberg M. (2013) Nutrient loading thresholds relevant to Wainono Lagoon (Canterbury). Hydrosphere report prepared for Environment Canterbury, Environment Canterbury, Christchurch. 12 p.

Waituna Lagoon Technical Group. (2013) Ecological guidelines for Waituna Lagoon. Hydrosphere report prepared for Environment Southland. Invercargill. 57 p.