{"help": "https://data.gov.au/data/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author_email": null, "contact_point": "Peter.A.Thompson@csiro.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "f07260fd-63a2-460b-b97a-cf68d4366fc3", "isopen": false, "language": "eng", "license_id": "notspecified", "license_title": "notspecified", "maintainer": null, "maintainer_email": null, "metadata_created": "2025-06-23T14:55:17.231899", "metadata_modified": "2025-06-23T14:55:17.231907", "name": "2016-soe-marine-chapter-state-and-trends-water-column-outer-shelf-25-m-250-m", "notes": "The Marine chapter of the 2016 State of the Environment (SoE) report incorporates multiple expert templates developed from streams of marine data. This metadata record describes the Expert Assessment \"The state and trends of habitats and communities - water column, outer shelf (25 m - 250 m)\". The full Expert Assessment, including figures and tables (where provided), is attached to this record. Where available, the Data Stream(s) used to generate this Expert Assessment are accessible through the \"On-line Resources\" section of this record.\n\nDESCRIPTION OF HABITAT/COMMUNITY FOR EXPERT ASSESSMENT\nThe water column is the primary habitat for pelagic communities that are mainly phytoplankton, bacteria, zooplankton and higher predators (in the ratios of ~300:75:10:1, respectively: Marchant 2002) and their biomass declines exponentially with depth (Rex et al., 2006). The major determinants of habitat quality for most pelagic organisms can be considered to be temperature (T), salinity (S), light, nutrients, dissolved oxygen (DO), pH, and food availability. The continental shelf waters around Australia are generally warm, saline, well illuminated, low in nutrients, and abundances of phytoplankton (Fig. 1), zooplankton (Fig. 2) and fish. Relative to the seasonal variability for the majority of the water column on the outer shelf there have been modest long term changes to these components of the habitat and its communities. Overall its current status should be considered good. The major potential threats that could reduce the existing flora and fauna can be considered to be: inputs from the terrestrial environment (sediments, nutrients, carbon), development, warming, declining [DO], decreasing pH and fishing. While there are areas of local habitat degradation (e.g. near ports and harbours) the overall impacts of local pressures tend to be low as Australia is a large area with a relatively sparse human population. There is increasing evidence our shelf waters are experiencing change due to the global pressures; some of which are deleterious. Shelf waters from Port Hedland to Cape Howe have risen ~ 1\u00b0C from 1993 to 2013 (Foster et al., 2014), and portions of the SW region were 3\u00b0C warmer during February 2011 than normal (Pearce and Feng 2013). There is evidence that dissolved oxygen has declined (Thompson et al. 2009) and continues to decline due to warming (Talley et al., 2016) plus concerns over acidification continue to grow (Mongin et al., 2016). Already there is clear evidence of community responses by phytoplankton, zooplankton and fish to these climatic pressures (e.g. Johnson et al. 2011).\nDATA STREAM(S) USED IN EXPERT ASSESSMENT\nData are computed from the level 3 (L3) daily global products using one merging method following Maritorena and Siegel, (2005). Details can be found at http://www.globcolour.info/products_description.html \nZooplankton data are from Australia\u2019s National Reference Stations operated by the Integrated Marine Observing System.\n\n2016 SOE ASSESSMENT SUMMARY [see attached Expert Assessment for full details]\n\u2022 2016 \u2022\nAssessment grade: Good\nAssessment trend: Unclear\nConfidence grade: Limited evidence or limited consensus\nConfidence trend: Limited evidence or limited consensus\nComparability: Grade and trend are somewhat comparable to the 2011 assessment\n\u2022 2011 \u2022\nAssessment grade: Good\nAssessment trend: Stable\nConfidence grade: Limited evidence or limited consensus\nConfidence trend: Limited evidence or limited consensus\n\nCHANGES SINCE 2011 SOE ASSESSMENT\nThis assessment uses observations from a greater range of spatial and temporal scales allowing a much better assessment of current state and trends to be made.  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