de.pangaea.dataset986944 und dataset PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact 2026-07-15T17:13:17Z https://doi.pangaea.de/10.1594/PANGAEA.986944 <gco:CharacterString>Photosynthetically active radiation (PAR) in Changuu Island, Zanzibar Archipelago, Tanzania</gco:CharacterString> 2026-04-08T07:57:27 publication https://doi.org/10.1594/PANGAEA.986944 Moreira-Saporiti, Agustín
am.saporiti@gmail.com
https://orcid.org/0000-0002-4798-3775 information author Teichberg, Mirta
mteichberg@mbl.edu
https://orcid.org/0000-0003-1586-738X information author O'Sullivan, Aoife
aoifeosullivan42@gmail.com
author PANGAEA
info@pangaea.de
https://www.pangaea.de/ information publisher tableDigital Photosynthetic active radiation (PAR) was measured during a nutrient enrichment and exclusion field experiment on seagrass. A total of 24 plots were set up parallel to the shore, with presence of the three seagrass species (Syringodium isoetifolium, Thalassodendron ciliatum and Thalassia hemprichii) in each plot. The experiment was the factorial combination of two treatments: macrofauna exclusion using cages (three levels: open, closed and uncaged) and nutrient enrichment using garden NPK fertilizer (two levels: ambient and enriched). Data was collected between July 19th and September 20th of 2017 in four sampling times (Day 0 (19.07.2017), Day 20 (09.08.2017), Day 38 (31.08.2017) and Day 63 (19.09.2017)). Data collection took place in Changuu Island (Zanzibar Archipelago, Tanzania) in the area that the experiment took place, and not per experimental plot. Changuu Island is located 3 km from Stone Town, Zanzibar's busiest town. The study area is characterised by a fringing reef around a multi-specific seagrass ecosystem. The substrate is primarily carbonate sediment. PAR and the calculation of the attenuation coefficient were collected at each sampling time to account for potential confounding variables during the experiment. Photosynthetically active radiation (PAR) was measured every 2 hours at each sampling time using a LiCor-1500 with a PAR sensor. The PAR sensor (μmol photons m−2 s−1) was placed at the water surface and approximately half a meter underwater. The light attenuation coefficient was calculated using the Bouguer-Lambert's law, which follows the equation: I(z)=I0 e -µz, where z is the depth in meters, I(z) is the PAR intensity at a depth z, I0 is the PAR intensity at the water surface and µ is the light attenuation coefficient. completed Moreira-Saporiti, Agustín
am.saporiti@gmail.com
https://orcid.org/0000-0002-4798-3775 information principalInvestigator attenuation coefficient Indian Ocean PAR photosynthetically active radiation Seagrass seawater Tropical theme <gco:CharacterString>PANGAEA Keyword List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact SEAMAC Seagrass and Macroalgal Community Dynamics and Performance under Environmental Change SEATRAIT Seagrass Ecosystem Service Evaluation using a Trait-based Approach theme <gco:CharacterString>PANGAEA Project List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation 39.167289999999994 39.167289999999994 -6.11788 -6.11788 2017-07-19T11:49:00 2017-09-19T13:30:00 0.3 0.6 Event label thematicClassification Type of study thematicClassification Sampling date thematicClassification Time in days physicalMeasurement Days since start of experiment days days LATITUDE thematicClassification LONGITUDE thematicClassification Site thematicClassification Radiation, photosynthetically active physicalMeasurement PAR sensor LI-1500, Li-COR Inc.; Surface µmol/m**2/s µmol/m**2/s Radiation, photosynthetically active physicalMeasurement PAR sensor LI-1500, Li-COR Inc.; Botttom µmol/m**2/s µmol/m**2/s DEPTH, water physicalMeasurement Ruler tape m m Attenuation coefficient physicalMeasurement 1/m 1/m text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.986944?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: Changuu_C1_T0_1 (T0_1) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-07-19T11:49:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-07-19T11:49:00 EVENT LABEL: Changuu_C1_T0_2 (T0_2) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-07-19T13:57:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-07-19T13:57:00 EVENT LABEL: Changuu_C1_T0_3 (T0_3) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-07-19T14:30:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-07-19T14:30:00 EVENT LABEL: Changuu_C1_T1_1 (T1_1) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-09T08:16:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-09T08:16:00 EVENT LABEL: Changuu_C1_T1_2 (T1_2) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-09T09:16:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-09T09:16:00 EVENT LABEL: Changuu_C1_T1_3 (T1_3) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-09T11:16:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-09T11:16:00 EVENT LABEL: Changuu_C1_T1_4 (T1_4) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-09T12:56:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-09T12:56:00 EVENT LABEL: Changuu_C1_T1_5 (T1_5) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-09T13:56:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-09T13:56:00 EVENT LABEL: Changuu_C1_T2_1 (T2_1) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-31T09:22:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-31T09:22:00 EVENT LABEL: Changuu_C1_T2_2 (T2_2) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-31T09:05:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-31T09:05:00 EVENT LABEL: Changuu_C1_T2_3 (T2_3) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-31T10:40:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-31T10:40:00 EVENT LABEL: Changuu_C1_T2_4 (T2_4) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-31T11:32:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-31T11:32:00 EVENT LABEL: Changuu_C1_T2_5 (T2_5) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-08-31T12:25:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-08-31T12:25:00 EVENT LABEL: Changuu_C1_T3_1 (T3_1) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-09-19T07:45:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-09-19T07:45:00 EVENT LABEL: Changuu_C1_T3_2 (T3_2) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-09-19T09:07:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-09-19T09:07:00 EVENT LABEL: Changuu_C1_T3_3 (T3_3) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-09-19T10:20:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-09-19T10:20:00 EVENT LABEL: Changuu_C1_T3_4 (T3_4) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-09-19T12:28:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-09-19T12:28:00 EVENT LABEL: Changuu_C1_T3_5 (T3_5) * LATITUDE: -6.117880 * LONGITUDE: 39.167290 * DATE/TIME: 2017-09-19T13:30:00 * LOCATION: Changuu Island, Zanzibar Archipelago, Tanzania * METHOD/DEVICE: Field experiment 2017-09-19T13:30:00 References <gco:CharacterString>Multi-level trophic cascades in a heavily exploited open marine ecosystem</gco:CharacterString> 2008-01-01 publication https://doi.org/10.1098/rspb.2007.1752 Casini, Michele author Lövgren, Johan author Hjelm, Joakim author Cardinale, Massimiliano author Molinero, Juan-Carlos author Kornilovs, Georgs author documentDigital Proceedings of the Royal Society B-Biological Sciences 275(1644) 1793-1801 References <gco:CharacterString>Effects of nutrient enrichment and small predator density on seagrass ecosystems: An experimental assessment</gco:CharacterString> 2000-01-01 publication https://doi.org/10.4319/lo.2000.45.5.1041 Heck, Kenneth L author Pennock, Jonathan R author Valentine, John F author Coen, Loren D author Sklenar, Susan A author documentDigital Limnology and Oceanography 45(5) 1041-1057 References <gco:CharacterString>Variable and complementary effects of herbivores on different life stages of bloom-forming macroalgae</gco:CharacterString> 2000-01-01 publication https://doi.org/10.3354/meps200167 Lotze, Heike K https://orcid.org/0000-0001-6258-1304 information author Worm, Boris https://orcid.org/0000-0002-5742-8716 information author documentDigital Marine Ecology Progress Series 200 167-175