I work at all levels in freshwater ecosystems, ranging from population and community ecology through to ecosystem and aquatic landscape ecology, including work on fish and invertebrates in streams, lakes and wetlands. I’ve been particularly interested in aquatic food webs, predator-prey interactions, the influences of flow-related habitat size and disturbance in rivers, exchanges between aquatic and terrestrial ecosystems, and restoration and rehabilitation. This has included long-running studies in the upper Waimakariri River system in Canterbury, at the Rocky Mountain Biological Laboratory in Colorado and in agricultural streams of the Canterbury Plains. Important aspects include investigations of:
- effects of non-native trout on galaxiid fishes,
- riverscape configuration influences on fish and other aquatic biodiversity,
- changes in river habitat size (e.g. through alteration in flows) on river food webs,
- habitat drying on pond communities,
- connections between aquatic and terrestrial ecosystems (cross-ecosystem influences)
-restoration of agricultural streams in the Canterbury Waterway Rehabilitation Experiment (CAREX).
See the FERG (Freshwater Ecology Research Group) pages for more details on this research and my EcologyLive website (see link under Resources above) for photographs, stories and information of interest to a wider audience.
- Greig HS., McHugh PA., Thompson RM., Warburton HJ. and McIntosh AR. (2022) Habitat size influences community stability. Ecology 103(1) http://dx.doi.org/10.1002/ecy.3545.
- Barrett IC., McIntosh AR., Febria CM. and Warburton HJ. (2021) Negative resistance and resilience: Biotic mechanisms underpin delayed biological recovery in stream restoration. Proceedings of the Royal Society B: Biological Sciences 288(1947) http://dx.doi.org/10.1098/rspb.2021.0354.
- Boddy NC. and McIntosh AR. (2021) Could spatial heterogeneity in flow disturbance drive temporal stability of native–invasive species co-occurrence in riverscapes? Freshwater Biology 66(5): 902-913. http://dx.doi.org/10.1111/fwb.13685.
- Coats SC., Wilson M. and McIntosh AR. (2021) Contextualizing the relative importance of habitat connectivity for metapopulation persistence: A case study of a critically endangered fish. Aquatic Conservation: Marine and Freshwater Ecosystems 31(8): 1956-1969. http://dx.doi.org/10.1002/aqc.3616.
- Fraley KM., Warburton HJ., Jellyman PG., Kelly D. and McIntosh AR. (2021) The influence of pastoral and native forest land cover, flooding disturbance, and stream size on the trophic ecology of New Zealand streams. Austral Ecology 46(5): 833-846. http://dx.doi.org/10.1111/aec.13028.