Annika Wagenhoff
Freshwater Ecologist – Land use and River Ecosystem Health
Qualifications
- PhD (Zoology). University of Otago, 2011
- Diploma (Geoecology), equivalent of MSc. University of Tϋbingen, Germany 2006
Role at Cawthron
Annika is a freshwater ecologist specialising in the impacts of agricultural land use on stream ecosystems.
Her research is motivated by providing scientific knowledge that can be applied in the sustainable management of freshwater resources. In particular, she is interested in the way multiple stressors interact to affect biotic communities and ecosystem functioning, and in defining thresholds of harm beyond which ecosystems should not be allowed to move.
Technical skills, experience and interests
- Land-use impacts on stream ecosystems
- Multiple-stressor effects
- Ecological thresholds
- Ecosystem functioning
- Nutrient cycling
- Restoration ecology
- Statistical modelling
Professional affiliations
- New Zealand Freshwater Sciences Society
- Society for Freshwater Science
View Annika's ResearchGate profile
Publication links
- Young RG, Wagenhoff A, Holmes R, Newton MJ and Clapcott JE 2018. What is a healthy river?. Cawthron Report No. 3035. Prepared for Cawthron Foundation .
- Wagenhoff A, Liess A, Pastor A, Clapcott JE, Goodwin E and Young RG 2017. Thresholds in ecosystem structural and functional responses to agricultural stressors can inform limit setting in streams. Freshwater Science. Volume 36, Issue 1. Pages 178-194.
- Wagenhoff A, Clapcott JE, Lau KEM, Lewis GD and Young RG 2017. Identifying congruence in stream assemblage thresholds in response to nutrient and sediment gradients for limit setting. Ecological Applications. Volume 27, Issue 2. Pages 469-484.
- Wood SA, Atalah J, Wagenhoff A, Brown L, Doehring KAM, Young RG and Hawes I 2017. Effect of river flow, temperature, and water chemistry on proliferations of the benthic anatoxin-producing cyanobacterium Phormidium. Freshwater Science. Volume 36, Issue 1. Pages 63-76.
- Wood SA, Wagenhoff A and Kelly D 2015. Phormidium blooms - relationships with flow, nutrients and fine sediment in the Maitai River. Prepared for Nelson City Council. 44 pages plus appendices.
- Wagenhoff A and Olsen DA 2014. Does large woody debris affect the hyporheic ecology of a small New Zealand pasture stream. New Zealand Journal of Marine and Freshwater Research 48(4): 547-559.
- Wagenhoff A and Shearer KA 2014. Assessment of ammonia effects on the Wairoro Stream fauna in the vicinity of the Kaikohe WWTP. Prepared for Far North District Council. 29 pages plus appendices.
- Wagenhoff A and Young RG 2013. Effects of willow removal on Australian and New Zealand stream ecosystems - A literature review of the potential risks and benefits. Prepared for Ministry of Business, Innovation and Employment project C01X1002: Maintenance and rehabilitation of aquatic ecosystems.
- Wagenhoff A, Lange K, Townsend CR and Matthaei CD 2013. Patterns of benthic algae and cyanobacteria along twin-stressor gradients of nutrients and fine sediment: a stream mesocosm experiment. Freshwater Biology 58(9): 1849-1863.
- Wagenhoff A, Clapcott JE and Goodwin E 2012. Review of river ecosystem threshold models. Cawthron Report 2259. Prepared for the 'management of cumulative effects of stressors on aquatic ecosystems' research programme (C01X1005). 41 pages.
- Liess A, Le Gros A, Wagenhoff A, Townsend CR and Matthaei CD 2012. Land use intensity in stream catchments affects the benthic food web: consequences for nutrient supply, periphyton C:nutrient ratios, and invertebrate richness and abundance. Freshwater Science, 31, 813-824.
- Wagenhoff A, Townsend CR and Matthaei CD 2012. Macroinvertebrate responses along broad stressor gradients of deposited fine sediment and dissolved nutrients: a stream mesocosm experiment. Journal of Applied Ecology, 49, 892-902.
- Wagenhoff A, Townsend CR, Phillips N and Matthaei CD 2011. Subsidy-stress and multiple-stressor effects along gradients of deposited fine sediment and dissolved nutrients in a regional set of streams and rivers. Freshwater Biology, 56, 1916-1936.
- Wagenhoff A, Matthaei CD and Townsend CR 2009. Multiple-stressor effects on stream health in Southland streams and rivers. A report provided to Environment Southland in fulfilment of Envirolink medium advice grant.
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