{"help": "https://data.gov.au/data/api/3/action/help_show?name=package_show", "success": true, "result": {"archived": false, "author_email": null, "contact_point": "Penelope.Pascoe@utas.edu.au", "creator_user_id": "c2fbbe4a-4ba0-4945-808b-67454605a4cf", "duplicate_score": 2, "geospatial_topic": [], "id": "a45f2aa3-0552-4daa-8622-bf28754142b5", "isopen": false, "language": "eng", "license_id": "notspecified", "license_title": "notspecified", "maintainer": null, "maintainer_email": null, "metadata_created": "2025-06-23T13:36:39.286462", "metadata_modified": "2025-06-23T13:36:39.286469", "name": "data-and-code-for-decadal-change-in-seabird-driven-isotopes-on-islands-with-differing-invasion-", "notes": "Invasive mammal eradications are commonplace in island conservation. However, post-eradication monitoring beyond the confirmation of target species removal is rarer. Seabirds are ecosystem engineers on islands and are negatively affected by invasive mammals. Following an invasive mammal eradication, the recovery of seabird populations can be necessary for wider ecosystem recovery. Seabirds fertilise islands with isotopically heavy nitrogen, which means nitrogen stable isotope analysis (\u03b415N) could provide a useful means for assessing corresponding change in ecosystem function. We quantified decadal changes in \u03b415N on eight temperate New Zealand islands subject in pairs to distinct mammal invasion and seabird restoration histories: invaded, never-invaded, invader-eradicated and undergoing active seabird restoration. First, we investigated long-term changes in \u03b415N values on individual islands. Second, we used a space for time analysis to determine if \u03b415N levels on islands from which invaders had been removed eventually recovered to values typical of never-invaded islands. On each island soil, plants (Coprosma repens, C. robust and Myrsine australis) and spiders (Porrhothelidae) were sampled in 2006/07 and 2022 allowing \u03b415N change on individual islands over 16 years to be assessed. Combined, the samples from invader-eradicated islands provided a 7 \u2013 32 year post-eradication dataset. Change in \u03b415N was only detected on one island across the study period, following the unexpected recolonisation of seabirds to an invaded island. Invader-eradicated islands generally had higher \u03b415N values than invaded islands however, they were still lower than never-invaded islands and there was no trend in \u03b415N with time since eradication. This, and the measurable increase in \u03b415N following seabird recolonisation on one island, may suggest that \u03b415N change occurs rapidly following invader-eradication, but then slows, with \u03b415N values staying relatively constant in the time period studied here. Isotope and seabird population studies need to be coupled to ascertain if plateauing in \u03b415N reflects a slowing of seabird population growth and subsequent basal nutrient input, or if the baseline nutrients are entering the ecosystem but then not propagating up the food web.", "num_resources": 5, "num_tags": 2, "organization": {"id": "0143757a-86ab-43e4-bba6-4a3a2a02b6c4", "name": "australian-ocean-data-network", "title": "Australian Ocean Data Network", "type": "organization", "description": "Harvester for Australian Ocean Data Network", "image_url": "", "created": "2025-06-23T12:29:10.320926", "is_organization": true, "approval_status": "approved", "state": "active"}, "original_harvest_source": {"site_url": "https://catalogue.aodn.org.au", "href": "https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/data-and-code-for-decadal-change-in-seabird-driven-isotopes-on-islands-with-differing-invasion-", "title": "Australian Oceans Data Network"}, "owner_org": "0143757a-86ab-43e4-bba6-4a3a2a02b6c4", "private": false, "promotion_level": "0", "spatial": "{\"type\": \"Polygon\", \"coordinates\": [[[172.423099, -41.404298], [175.129228, -41.404298], [175.129228, -40.187028], [172.423099, -40.187028], [172.423099, -41.404298]]]}", "spatial_coverage": "{\"type\": \"Polygon\", \"coordinates\": [[[172.423099, -41.404298], [175.129228, -41.404298], [175.129228, -40.187028], [172.423099, -40.187028], [172.423099, -41.404298]]]}", "state": "active", "temporal_coverage_from": "2006-10-01 00:00:00", "temporal_coverage_to": "2022-04-30 00:00:00", "title": "Data and code for: Decadal change in seabird-driven isotopes on islands with differing invasion histories", "type": "dataset", "unpublished": false, "url": null, "version": null, "extras": [{"key": "harvest_object_id", "value": "8cb02429-6b85-47dd-94ec-2d8fcb66bdb7"}, {"key": "harvest_source_id", "value": "a2216e59-91ec-48b1-83cc-d35d9f09fcec"}, {"key": "harvest_source_title", "value": "Australian Oceans Data Network"}], "resources": [{"cache_last_updated": null, "cache_url": null, "created": "2025-06-23T13:36:39.291484", "datastore_active": false, "datastore_contains_all_records_of_source_file": false, "description": "", "format": "HTML", "hash": "", "id": "ef045dff-193a-4d2b-be00-d70fa5637ec3", "last_modified": null, "metadata_modified": "2025-06-23T13:36:39.279496", "mimetype": null, "mimetype_inner": null, "name": "DATA ACCESS - 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