c176bbd1-7ad6-43e7-b82b-7c707e95522f English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2026-02-26T13:16:57 UK GEMINI 2.3 WGS 84 Coral bleaching and nutrient responses to elevated temperature and nutrient exposure, Laamu Atoll, Maldives, 2022-2024 2026-02-25 publication https://catalogue.ceh.ac.uk/id/c176bbd1-7ad6-43e7-b82b-7c707e95522f 10.5285/c176bbd1-7ad6-43e7-b82b-7c707e95522f doi: Arnull, J., Tudhope, A.W., Wilson, A.M.W., Ganeshram, R.S., Hashim, A.S., Ziyadh, A.M. (2026). Coral bleaching and nutrient responses to elevated temperature and nutrient exposure, Laamu Atoll, Maldives, 2022-2024. NERC EDS Environmental Information Data Centre 10.5285/c176bbd1-7ad6-43e7-b82b-7c707e95522f [This dataset is embargoed until December 31, 2026]. The data consist of coral bleaching data; coral elemental and isotopic data (of coral host tissue and algal symbionts); coral metric data (size and depth of coral colonies used in experiment); water nutrient data collected next to corals over the experimental period; diffuser weights of fertiliser bags (to help calculate diffusion rates of fertiliser loss) and temperature data (recorded over the experimental windows in-situ and using satellite data). This dataset contains in-situ experimental information relating two separate nutrient enrichment experiments that were conducted over January - June 2022 and January 2023 - July 2024. The experiments were designed to understand the in-situ bleaching and nutrients responses of corals (Pocillopora spp.) to the interactive effect of elevated temperatures and elevated nutrient concentrations relative to controls. Slow-release agricultural fertilisers were used to elevate local concentrations. In 2022, two types of fertilisers were used (High N = 18-9-10 NPK or High P = 13-13-13 NPK). In 2023-24, the same fertiliser was used (24-7-14 NPK) but at two quantities, medium-N (50-75 g of fertiliser) and high-N (150-200 g of fertiliser) to better understand thresholds. Both experiments were conducted on lagoonal patch reefs in Laamu atoll, Maldives. The work has been undertaken has been funded by the GCRF-UKRI South Asian Nitrogen Hub and enabled through the University of Edinburgh and Maldivian non-governmental organisation, Maldives Resilient Reefs. Full details about this dataset can be found at https://doi.org/10.5285/c176bbd1-7ad6-43e7-b82b-7c707e95522f Jessica Arnull University of Edinburgh Jessica.Arnull@ed.ac.uk pointOfContact Arnull, J. University of Edinburgh Jessica.Arnull@ed.ac.uk https://orcid.org/0009-0007-0389-9292 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Tudhope, A.W. University of Edinburgh sandy.tudhope@ed.ac.uk https://orcid.org/0000-0003-1819-3325 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Wilson, A.M.W. University of Edinburgh meriwether.wilson@ed.ac.uk author Ganeshram, R.S. University of Edinburgh R.Ganeshram@ed.ac.uk https://orcid.org/0000-0002-5150-1310 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Hashim, A.S. Maldives Resilient Reefs shaha@bluemarinefoundation.com https://orcid.org/0000-0003-4735-6752 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Ziyadh, A.M. Maldives Resilient Reefs Mufliha@maldivesresilientreefs.com author University of Edinburgh EMAIL NOT PROVIDED owner NERC EDS Environmental Information Data Centre info@eidc.ac.uk publisher NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian Environmental Monitoring Facilities theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication coral reef enrichment experimental study coastal pollution isotope nitrogen Indian Ocean GEMET - Concepts, version 4.1.3 2019-01-28 creation Pollution Water quality Biodiversity otherRestrictions Embargoed otherRestrictions This resource is available under the terms of the Open Government Licence otherRestrictions If you reuse this data, you should cite: Arnull, J., Tudhope, A.W., Wilson, A.M.W., Ganeshram, R.S., Hashim, A.S., Ziyadh, A.M. (2026). Coral bleaching and nutrient responses to elevated temperature and nutrient exposure, Laamu Atoll, Maldives, 2022-2024. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/c176bbd1-7ad6-43e7-b82b-7c707e95522f textTable English utf8 oceans environment biota 2022-01-01 2024-07-31 73.378 73.585 1.81 1.998 Comma-separated values (CSV) NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor dataset dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Coral bleaching data was generated through a visual assessment against University of Queensland coral bleaching cards for each coral during the experiments, where 1 = bleached, 6 = not bleached. The depth and size of each coral were collected at the start of each experiment. Coral nubbins were collected and separated out into tissue host fraction and algal symbiont fraction. These separate fractions were then analysed for elemental and isotopic compositions (percent carbon, percent nitrogen, δ13C and δ15N). Water sampling was conducted throughout both experiments and analysed for dissolved inorganic nutrients to confirm enrichment. Temperature was logged throughout the experiments using HOBO loggers. Any lapse in logger functionality was addressed using supplementary nearby logger data or satellite data. A record of the fertiliser bags ('diffusers') was kept throughout the experiment to work out weight loss between diffuser changes. Manual checks have been performed on the data to look for any error in data entry or values reported outside the expected range. This data is heterogenous in nature. Any outliers were then investigated and corrected where appropriate.