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2018

38 record(s)
 
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    Biologically relevant macronutrients, nitrate + nitrite, silicate, phosphate and ammonia, were measured at all sites throughout the study. Nitrate + nitrite values (NOx) at the surface showed clear seasonal trends, peaking over winter and drawing down to near zero in summer and autumn. Phosphate concentrations also reached a peak in winter, which was associated with Southern Ocean influence. Median ammonium concentrations at all sites were generally <0.5 μM, with no clear peaks in any season or month. Overall, the lowest values were measured in August and other months showed reasonable spread around the median. Median silicate concentrations were consistently highest at sites 1 and 9, followed by site 5. Water from the River Derwent flows through site 1, then tracks east towards site 9 then site 5. Seasonally, silicate was generally highest in winter when the River Derwent outflow is also greatest.

  • Meta data of all tagged hammerhead sharks detailing tag dates, locations, and shark biological details.

  • This record provides an overview of the scope of NESP Marine Biodiversity Hub Project E5 - "The role of restoration in conserving Matters of National Environmental Significance (MNES)". No raw data products are anticipated for this project. -------------------- This research will assess the capacity of habitat restoration to insulate against loss and degradation of MNES, through restoration key habitats and the species they support. In general, restoration techniques in marine ecosystems have been seen as embryonic and cost-prohibitive. But the risk of decline in key habitats and their potential loss through the cumulative impacts of climate change and local pressures makes the imperative for more effective and efficient techniques urgent. In several habitats, recent advances in technology suggest marked improvement in efficacy and cost-effectiveness. This project will review and assess the capacity of active restoration to secure conservation outcomes for MNES across four habitats: giant kelp forests, seagrass communities, saltmarsh communities, and shellfish communities. Planned Outputs • Report: Review – the role of restoration in conserving matters of national environmental significance • Report: Workshop outcomes - The cost-effectiveness of alternative restoration projects

  • Seven case study locations (Keep, Daly, Roper, McArthur, Flinders, and Gilbert River estuaries, and Darwin Harbour) were used to test the utility of the Australian Landsat data archive in the Digital Earth Australia analysis platform for characterising and monitoring the condition and change in coastal habitats. A suite of analyses was undertaken including: assessing the extent of different coastal habitats, detecting coastal change including change in mangrove communities, and the distribution of intertidal areas. The work was successful in: (a) generating baseline information for the case study areas; and, (b) developing valuable monitoring tools for future use.

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    Zooplankton was counted and identified from three sites over the 5-year period. The net used (200 m Bongo net) was designed to catch meso-zooplankton with an integrated vertical tow through the water column. One net from each of the paired Bongo samples was analysed and the data expressed as numbers per m3. Copepods dominated the zooplankton, with other groups such as salps, krill, appendicularians, cladocerans, chaetognaths and meroplanktonic larvae being seasonally dominant.

  • Australia has established a network of 58 marine parks within Commonwealth waters covering a total of 3.3 million square kilometres, or 40 per cent of our exclusive economic zone (excluding Australian Antarctic Territory). These parks span a range of settings, from near coastal and shelf habitats to abyssal plains. Parks Australia manages the park network through management plans that came into effect for all parks on 1 July 2018. Geoscience Australia is contributing to their management by collating and interpreting existing environmental data, and through the collection of new data. This includes compiling existing bathymetry datasets for select marine parks. This dataset includes a compilation of multibeam sonar bathymetry (gridded to 100 m spatial resolution) for Bremer Marine Park, in the South-west Marine Park Network. The park incorporates Bremer Canyon and adjacent smaller canyons that incise the continental slope and outer shelf. This research is supported by the National Environmental Science Program (NESP) Marine Biodiversity Hub through Project D1.

  • This record provides an overview of the scope of NESP Marine Biodiversity Hub Project E1 - "Guidelines for analysis of cumulative impacts and risks to the Great Barrier Reef". No raw data products are anticipated for this project. -------------------- The project will develop guidance for the analysis of cumulative impacts and risks to the environmental, social and economic values of the GBR. The project will use existing information to develop guidance for use by GBRMPA, DoEE, the Queensland Government and proponents of future development proposals. The project will build on the work undertaken in the GBR Strategic Assessment and support works undertaken under the Reef 2050 plan. The guidance will provide a practical science-based approach to assessment of cumulative risks to the Reef. Research will focus on providing a general and repeatable approach to be applied at the whole-of-reef scale (to meet planning, assessment and reporting requirements of the GBRMPA) and also at the development-site-scale (to meet the environmental assessment requirements of the GBRMPA and future proponents). The guidance will be developed in close collaboration with the GBRMPA and DoEE to ensure it is practical and compatible with relevant legislation and policy applicable to proposed actions within the GBR. The project will include a case study focused on attributing impacts of pressures and their cumulative impacts on shallow-water coral reefs of eastern Australia (including cumulative impacts for the whole-of-GBR). It will also examine how this could be applied to shallow temperate reefs follow recent risk assessments conducted in NSW. Research is primarily designed to meet the specific needs of GBRMPA and future proponents. NSW DPI, QLD Government and Parks Australia, may also benefit from the case study and insights to assessment of cumulative impacts. Planned Outputs • Case Study Report on GBR & Coral Sea reefs pressure analysis. • Final report - guidance for analysis of cumulative impacts and risk

  • This record provides an overview of the scope and research data outputs of NESP Marine Biodiversity Hub Project E2 - "Characterising anthropogenic underwater noise to improve understanding and management of acoustic impacts to marine wildlife". For specific data outputs from this project, please see child records associated with this metadata. -------------------- Shipping noise is a marine pollutant that contributes significantly to the marine soundscape and is a stressor of marine animals, particularly marine mammals. In Australia, the characterisation and actual impacts of shipping noise on species behaviour are not clearly understood and information is needed. This research will provide quantitative spatial and temporal maps of shipping noise to inform on noise exposure and impacts to MNES within the EEZ and in WHA’s. The outputs will provide key information to marine management agencies such as DoEE, AMSA and GBRMPA to help them meet responsibilities and obligations under international and national law and policy to minimise the impacts of shipping noise on MNES. Planned Outputs • A suite of maps of chronic shipping noise for key areas and species of concern, identifying key management areas and gross polluters. • A database of ship source spectra for predominant large vessels • A paper on improved methods or ambient noise estimation • Report on the quantification of shipping noise on Matters of National Environmental Significance • Final report on the characterisation of shipping noise in Australia

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    Phytoplankton was counted and identified from five sites over the 5-year period. Annual cycles in abundance are available (as cells mL-1), along with detailed species identification. Cell measurements and approximate geometric shape were also recorded for the calculation of biovolume (μL cell-1). Diatoms and dinoflagellates dominated the samples in terms of biomass, however, small cells were also very abundant throughout each year. The data are restricted to an integrated sample from the top 12 m of the water column. Fluorescence profiles elsewhere in this dataset can provide an indication of phytoplankton presence lower in the water column.

  • This record provides an overview of the scope and research data outputs of NESP Marine Biodiversity Hub Project E4 - "Recreational fishing in Commonwealth waters". For specific data outputs from this project, please see child records associated with this metadata. -------------------- Recent assessment have suggested that Australian marine recreational fishers (MRF) are moving further offshore in pursuit of fishing opportunities, which places them in areas managed by the Australian Government. As recreational fishers are key stakeholders in marine management, of MRF effort, catch, motivations and values are required to effectively inform administration of Australian Marine Parks (AMPs) and fisheries. In 2018 the use of exiting MRF state-wide assessment was trialled in WA and NSW to quantify fishing within the Hunter and Ningaloo AMPs. In 2019 this work will be extended to analyse state charter-boat MRF datasets with a particular emphasis on our selected AMPs and the Perth Canyon AMP. Planned Outputs • State of knowledge and gap analysis of recreational fishing in Commonwealth waters (spatial data) • On ground motivation and targets by active fishers of AMP [report]