Tactical Research Fund: Nutrient and phytoplankton data from Storm Bay to support sustainable resource planning
University of Tasmania (UTAS)
Christine D. Crawford
Knowledge of changing environmental conditions and productivity as a result of climate change is essential for adaptive management. In addition to direct applicability to fisheries and aquaculture in southern Tasmania, this information will have numerous important applications to other industries and stakeholders in the broader catchment. CSIRO and TAFI have established a program (INFORMD- Inshore network for observation and regional management: Derwent-Huon) to guide multiple use coastal zone development and management. Storm Bay is an integral component of the INFORMD region and a priority is to understand both the short term (climate variability) and long-term (climate change) drivers of productivity in the region and link these to production of fisheries and aquaculture. CSIRO have a project investigating novel observing technologies (NOTe) to characterize the Derwent to shelf environment and TAFI will fund a charter vessel to monthly sample water column environmental variables, and support the CSIRO observing system. Thus an opportunity exists to obtain nutrient and productivity data in the Storm Bay region in a very cost-effective manner by collaborating with the existing research program. Important background information is that the East Australian Current is predicted to penetrate further south causing significant warming and decreased productivity. Previous work (Harris et al 1991) showed that the nutrient status of waters clearly indicated the influence of the EAC, and primary producers indicated the productivity of the region, demonstrating the potential for Storm Bay to act as an indicator of productivity for Southern and Eastern Tasmania. Such information is important to understanding changes in fisheries and aquaculture production and, as a consequence, to assist with developing climate change adaptive management strategies. This project also provides an opportunity for FRDC to invest in a project that will have significant influence on multiple use management in Australia.
1. To provide information on the effects of a changing climate on water quality in Storm Bay and associated potential impacts on fisheries and aquaculture.
2. To collect nutrient and algal data from a targeted suite of sampling sites in Storm Bay to support sustainable development of the aquaculture industry.
This project has provided preliminary data on environmental conditions in Storm Bay that is assisting managers and marine industries to better understand effects of climate change and climate variability on fisheries and aquaculture in the region, including changing currents and primary productivity. This information is being used to inform the development of climate change adaptive management strategies for commercial and recreational fisheries and for the potential expansion of salmon aquaculture into Storm Bay. The environmental characterisation of Storm Bay is also supporting planning in the region, by providing baseline data and data for projects modelling the bay’s water circulation and ecosystem dynamics. This information will support the development of multiple use management plans for the region.
Keywords: Climate variability, Storm Bay, water quality, productivity, offshore salmon aquaculture