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Seagrass meadow extent and meadow-scape was mapped using four alternative approaches at Yule Point, a coastal clear water habitat, in the Cairns section of the Great Barrier Reef, between October 2017 and July 2020. Approach 1 included mapping meadow boundaries and meadow-scape during low spring tides on foot using a handheld GPS. Approach 2 was where the meadows were surveyed at low tide with observations from a helicopter, with observational spot-checks conducted at a number haphazardly scattered points. Approach 3 used imagery collected during low spring tides with a UAV at an altitude of 30 m with a resolution of 0.2cm/pixel. Approach 4 used PlanetScope Dove imagery captured on 05 September 2017 and 09 August 2019 coinciding as close as possible to the field-surveys in 2017 and 2019, with 3.7 m x 3.7 m pixels (nadir viewing) acquired from the PlanetScope archive. This record describes meadow extent data collected using Approach 4 (PlanetScope imagery). View the original metadata record at https://doi.pangaea.de/10.1594/PANGAEA.946604 for the full data collection.
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This dataset has been superseded by https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/0145df96-3847-474b-8b63-a66f0e03ff54 (Victorian Statewide Marine Habitat Map 2023). The Victorian Benthic Habitats - Western Port Bay (CBICS) is a synthesis of all existing benthic habitat characterisations of the embayment which have been reclassified to conform to the Combined Biotope Classification Scheme (CBiCS). Base layers for the synthesised dataset were sourced from data provided by: Marine and Freshwater Resources Institute, Queenscliff, Victoria Institute for Sustainability and Innovation, Victoria University, Melbourne. Parks Victoria, Victorian Government Deakin University, Victoria Department of Environment, Land, Water and Planning, Victorian Government
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This record provides an overview of the scope and research output of the NESP Marine Biodiversity Hub project "Continental-scale tracking of threats to shallow Australian reef ecosystems". For specific data outputs from this project, please see child records associated with this metadata. -------------------- The project will integrate Australia’s largest, most detailed datasets of shallow-water tropical and temperate marine biodiversity, and assess how pollution, fishing, rising sea temperatures and introduced species are impacting associated natural values. An initial outcome will be the identification of state-of-the-environment indicators for inclusion in the 2016 State of the Environment report, with subsequent activities aimed at contributing additional data products needed for other NESP projects, Parks Australia, and the Essential Environmental Measures initiative. The project will also describe a national shallow-water baseline of biodiversity in Commonwealth Marine Reserves for assessment of change through the long term. Planned Outputs Publications describing: • Environmental values at all sites investigated in Commonwealth waters by Reef Life Survey divers • Compatibility of survey data obtained through LTMP, RLS and LTMPA programs, and corrections factors needed when linking outputs of these monitoring programs • Time series data depicting interannual variation over the past two decades in ecological indicators specific to individual threats • Relationships between anthropogenic stressors and reef condition, with emphasis on impacts of sewage and heavy metal pollution, fishing, warming sea temperature, urbanisation and introduced species • Sensitive and cost effective indicators of threats to environmental condition. • Coherent marine ecological data streams that feed into SoE reporting, the Essential Environmental Measures initiative, and future evaluation of Commonwealth Marine Reserves.
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The dynamics of carbonate system of a coastal coral reef system under the influence of submarine groundwater discharge in Sanya Bay in the northern South China Sea were investigated using time-series observation.
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The effect of barrens formed by the long spined sea urchin, Centrostephanus rodgersii, on the standing stocks of southern rock lobsters (Jasus edwardsii) and black lip abalone (Haliotis rubra) was estimated by divers using underwater visual census methods to compare lobster and abalone abundance in barrens with that in adjacent kelp habitat. Abalone (H. rubra) and rock-lobster (J. edwardsii) populations were compared on C. rodgersii barrens and in adjacent algal-dominated habitat at the same depth and on the same substratum type at three sites in eastern Tasmania (Elephant Rock:Binalong Bay, St Helens Is, and Mistaken Cape:Maria Island). At Elephant Rock and St Helens Island , the barrens are extensive and well established Type 1 barrens, while at Mistaken Cape the barrens in 8-14 m are incipient Type 4 barrens, comprising small barren patches in the algal bed (see FRDC report for classification of barren types). Note that while there are extensive barrens in deeper water (>18 m) at Mistaken Cape, at these depths working time is limited and it was difficult to locate intact macroalgal beds on equivalent substrata.
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The data is quantitative abundance of fish and megafaunal invertebrates and algal % cover derived from transect based counts at a wide range of locations across Temperate Australia. The methods are described in detail in Edgar and Barrett (1997). Primarily the data are derived from transects at 5 m depth and/or 10 m depth at each site surveyed. Methods were initially developed for research on temporal changes following protection in Tasmanian MPAs (Maria Is, Tinderbox, Ninepin Point, Governor Island). The data represented by this record was collected in MPA studies and surveys interstate, and was collected from Esperence to Albany (WA). In many cases the dataset involved temporal replication (year scale).
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Data on captive feeding trials for prey preference in southern rock lobsters on longspined sea urchins, black lipped abalone, shortspined sea urchins and periwinkle.
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This record provides an overview of the NESP Marine and Coastal Hub bridging study - "Support for Parks Australia’s Monitoring, Evaluation, Reporting and Improvement System for Australian Marine Parks". For specific data outputs from this project, please see child records associated with this metadata. -------------------- The system of marine parks that spans Australia’s Commonwealth waters is among the largest in the world. These parks play a major role in conserving marine life, supporting commercial and recreational activities, and protecting cultural values significant to Aboriginal and Torres Strait Islander peoples. Parks Australia has developed management plans for five regional Australian Marine Park (AMP) networks (North, North-west, South-west, South-east and Temperate East) and the Coral Sea Marine Park (CSMP). Under each management plan, a science plan sets priorities for monitoring and research to evaluate management effectiveness and identify opportunities for improvement. This prioritisation is vital given the limited knowledge across many AMPs, the technical challenges and high costs of science in remote areas, and the finite resources available for park management. Building on foundational work from the NESP Marine Biodiversity Hub (projects SS2 and D7), this project delivered the scientific and technical advice needed to establish monitoring priorities for natural values and pressures across all AMP networks and the CSMP—completing a full national priority list for monitoring. It applied a nationally consistent four-step prioritisation framework that considered ecological importance, vulnerability to pressures, baseline data availability, and logistical feasibility. The project also updated the National Ecosystem model and Pressures & Activities datasets, conducted expert vulnerability assessments, and produced a Relative Cumulative Impact index. The combined research delivers a nationally accepted "common language" to describe natural values and pressures and a science-based method to derive monitoring priorities, aligned with the Monitoring, Evaluation, Reporting and Improvement (MERI) system—an adaptive management framework that is globally unique and a significant step towards adaptive, integrated, place-based management. Key outputs include a national database of environmental and human-use data for each management region and a refined list of monitoring priorities for each AMP Network and the CSMP. The findings highlight major knowledge gaps—particularly in the distribution of mesophotic and rariphotic reefs, intertidal ecosystems, and recreational fishing impacts—and provide guidance for improving baseline data and pressure assessments. The prioritisation framework and data products developed through this project can be re-generated over time alongside improvements in the evidence base and our understanding of how ecosystems respond to multi-sectoral activities to support continual improvement in iterative, evidence-based park management and environmental outcomes. Outputs • Digital map layers per AMP network of: (1) Ecosystems; (2) Pressures & Activities; and (3) Cumulative Benthic & Pelagic Impacts • Final Technical Report containing maps of Key Natural Values, and of spatial Monitoring Priorities, including a short summary of recommendations for policy makers of key findings [written]
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A 2038-year South West Western Australia rainfall reconstruction. The prolonged rainfall reduction in South West Western Australia (SWWA) in recent decades has previously been reported to be unprecedented in the past 750 years. This rainfall reduction has reduced the water supply for both residents and agriculture in SWWA. However, the cause of this rainfall reduction is unclear. The relatively short length of the SWWA instrumental rainfall record limits longterm studies of SWWA rainfall. In this study, SWWA rainfall is reconstructed based on a statistically significant negative correlation between SWWA rainfall and snowfall at Dome Summit South (DSS), East Antarctica. The 2000-year DSS snow accumulation record is used to reconstruct SWWA rainfall from 22 BCE to 2015 CE. With Cumulative Summation (CUSUM) analysis applied to the rainfall reconstruction, it is found that SWWA rainfall started to reduce around 1971 CE. This prolonged rainfall reduction is unprecedented during the past 750 years, but there have been two prior droughts of similar duration and intensity during the past 2000 years. Applying statistical techniques to compare the rainfall reconstruction with climate model simulations, it is found that greenhouse gases are likely to be the dominant driver of the SWWA rainfall drying trend after 1971 CE.
IMAS Metadata Catalogue