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Project details
| Title: | Carbonate chemistry sampling in Bass Strait |
| Id: | 2643 |
| Investigator(s): | Zanna Chase
University of Tasmania [details] |
| Description: | This Piggyback project will collect 30 samples for Dissolved Inorganic Carbon (DIC) and Alkalinity on the SEAMES-3 voyage (IN2024_V05). This work supports an initiative to study the efficacy and impact of Ocean Alkalinity Enhancement (OAE) in Bass Strait. There is currently limited information on inorganic carbon chemistry in Bass Strait. This data is needed to better understand the suitability of Bass Strait for OAE, to establish a baseline, and to assess our regional biogeochemical model. |
| Description (full): | This Piggyback project will collect 30 samples for Dissolved Inorganic Carbon (DIC) and Alkalinity on the SEAMES-3 voyage (IN2024_V05). This work supports an initiative to study the efficacy and impact of Ocean Alkalinity Enhancement (OAE) in Bass Strait. There is currently limited information on inorganic carbon chemistry in Bass Strait. This data is needed to better understand the suitability of Bass Strait for OAE, to establish a baseline, and to assess our regional biogeochemical model. Preliminary data will also strengthen proposals to secure funding for future research. The project will contribute to an undergraduate summer project at UTAS that aims to review existing knowledge of oceanographic and environmental conditions in Bass Strait relevant to OAE. The work is being supported onboard by Claire Davies (CSIRO) and Jackson Griffin (UTAS). |
| Years: | 2024 |
List of surveys that this project was on.
Use [details] link to view survey details (map, reports, metadata etc) including links to download data.
| Survey | Investigator | Description |
|---|---|---|
| IN2024_V05 [details] |
Little, Rich | The marine waters of southeast Australia are one of a series of global ocean hotspots. Species abundances are changing. Many are shifting their distributions southward. Extreme events, such as marine heatwaves, are leading to additional impacts. In this hotspot lies the Australian Commonwealth Southeast Marine Park Network (SE-MPN). It is unclear whether ecosystem changes have also affected the marine parks, or whether the network has mitigated them. Also, in this hotspot lie important fisheries, providing the bulk of fresh fish to Melbourne and Sydney markets. Observations from the fisheries in the region over the past 20 years have indicated declines in abundance and commercial catch rates of several species. Stocks that were historically over-fished seem not to have recovered as expected, despite active fisheries management and a reduction in fishing effort. A recent review of the fisheries concluded that physical and ecosystem factors are likely to be affecting the main species, directly or indirectly. The last survey of the ecosystem was conducted 25 years ago. This project will repeat this survey to document changes in the ecosystem and establish a new biological and environmental baseline to help answer three broad questions: 1. How and why have fish assemblages and species abundances changed in the southeast ecosystem, and can the causes be mitigated? 2. How does this affect the multiple-use management of the region, particularly conservation and biodiversity management of Australian Marine Parks and the range of human activities in it? 3. What are the implications for marine spatial planning and adaptive management in the sectors that use the marine ecosystem? The survey is also testing new monitoring techniques including environmental DNA, and AI technology to detect and count seabirds. IN2024_V05 is the third of four monitoring surveys planned to help answer the above questions. For more details, please refer to the voyage documentation. |