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Moreira-Saporiti, Agustín; Teichberg, Mirta (2022): Light intensity on the water surface and at the bottom of the water column during the experiment in Chwaka Bay (Unguja Island, Zanzibar Archipelago, Tanzania) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.942685, In: Moreira-Saporiti, A; Teichberg, M (2022): Seagrass and associated macroalgae abundance in Chwaka Way (Unguja Island, Zanzibar Archipelago, Tanzania) under control, trampling and seaweed farming conditions [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.942690

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Abstract:
A Li-Cor 1500 with a PAR (photosynthetically active radiation) sensor was used to measure the degree of shading by the seaweed growing over the seagrass meadow at each sampling time. Three random points were chosen within the seaweed farm plots and outside the farmed plots (control). The underwater PAR sensor (μmol photons m−2 s−1) was placed just below the water surface and at the seagrass canopy, while recording also the water depth at the canopy.
Keyword(s):
Halophila stipulacea; Seagrass community dynamics; Shading; Thalassia hemprichii; Trampling
Related to:
Moreira-Saporiti, Agustín; Hoeijmakers, Dieuwke; Msuya, Flower E; Reuter, Hauke; Teichberg, Mirta (2021): Seaweed farming pressure affects seagrass and benthic macroalgae dynamics in Chwaka Bay (Zanzibar, Tanzania). Regional Environmental Change, 21(1), https://doi.org/10.1007/s10113-020-01742-2
Funding:
German Research Foundation (DFG), grant/award no. DFG TE 1046/3-1: Seagrass and Macroalgal Community Dynamics and Performance under Environmental Change (SEAMAC)
Coverage:
Latitude: -6.148900 * Longitude: 39.452800
Date/Time Start: 2015-11-25T00:00:00 * Date/Time End: 2016-01-27T00:00:00
Minimum DEPTH, water: 0.000 m * Maximum DEPTH, water: 1.100 m
Event(s):
Unguja_Island_Chwaka1 (Chwaka1)  * Latitude: -6.148900 * Longitude: 39.452800 * Date/Time: 2015-11-25T00:00:00 * Elevation: 0.0 m * Location: Zanzibar Archipealgo, Tanzania * Campaign: Seaweed_farming_experiment * Method/Device: Experiment (EXP) * Comment: The experiment sites consisted of subtidal meadows.
Unguja_Island_Chwaka2 (Chwaka2)  * Latitude: -6.148900 * Longitude: 39.452800 * Date/Time: 2015-12-09T00:00:00 * Elevation: 0.0 m * Location: Zanzibar Archipealgo, Tanzania * Campaign: Seaweed_farming_experiment * Method/Device: Experiment (EXP) * Comment: The experiment sites consisted of subtidal meadows.
Unguja_Island_Chwaka3 (Chwaka3)  * Latitude: -6.148900 * Longitude: 39.452800 * Date/Time: 2015-12-28T00:00:00 * Elevation: 0.0 m * Location: Zanzibar Archipealgo, Tanzania * Campaign: Seaweed_farming_experiment * Method/Device: Experiment (EXP) * Comment: The experiment sites consisted of subtidal meadows.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventMoreira-Saporiti, Agustín
2 SiteSiteMoreira-Saporiti, Agustín
3 Experimental treatmentExp treatMoreira-Saporiti, Agustín
4 DEPTH, waterDepth watermMoreira-Saporiti, AgustínGeocode
5 Radiation, photosynthetically activePARµmol/m2/sMoreira-Saporiti, AgustínPAR sensor LI-1500, Li-COR Inc.Surface PAR
6 Radiation, photosynthetically activePARµmol/m2/sMoreira-Saporiti, AgustínPAR sensor LI-1500, Li-COR Inc.Bottom PAR
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
288 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Event		2 
Site		3 
Exp treat		4 
Depth water [m]		5 
PAR [µmol/m2/s]
(Surface PAR)		6 
PAR [µmol/m2/s]
(Bottom PAR)
Unguja_Island_Chwaka1 Chwaka1Seaweed Farm Treatment0.5031227.0866.40
Unguja_Island_Chwaka1Chwaka1Seaweed Farm Treatment0.5061217.0664.70
Unguja_Island_Chwaka1Chwaka1Seaweed Farm Treatment0.4021252.0568.40
Unguja_Island_Chwaka1Chwaka1Control0.5001297.0997.00
Unguja_Island_Chwaka1Chwaka1Control0.5001262.0962.80
Unguja_Island_Chwaka1Chwaka1Control0.5021265.01014.00
Unguja_Island_Chwaka1Chwaka1Seaweed Farm Treatment1.0001258.0215.00
Unguja_Island_Chwaka1Chwaka1Seaweed Farm Treatment1.0501484.0137.20
Unguja_Island_Chwaka1Chwaka1Seaweed Farm Treatment1.1001314.0308.70
Unguja_Island_Chwaka1Chwaka1Control1.0701606.0831.70
Unguja_Island_Chwaka1Chwaka1Control1.1001513.0511.00
Unguja_Island_Chwaka1Chwaka1Control1.1001711.01038.00
Unguja_Island_Chwaka1Chwaka1Seaweed Farm Treatment0.4101348.01117.00
Unguja_Island_Chwaka1Chwaka1Seaweed Farm Treatment0.4101354.0944.90
Unguja_Island_Chwaka1Chwaka1Seaweed Farm Treatment0.6001361.0803.50
Unguja_Island_Chwaka1Chwaka1Control0.3101361.01061.00
Unguja_Island_Chwaka1Chwaka1Control0.4001324.01244.00
Unguja_Island_Chwaka1Chwaka1Control0.4001323.01214.00
Unguja_Island_Chwaka2 Chwaka2Seaweed Farm Treatment0.6001025.053.61
Unguja_Island_Chwaka2Chwaka2Seaweed Farm Treatment0.620964.9116.90
Unguja_Island_Chwaka2Chwaka2Seaweed Farm Treatment0.7001022.075.12
Unguja_Island_Chwaka2Chwaka2Control0.6401124.0710.50
Unguja_Island_Chwaka2Chwaka2Control0.620976.1826.60
Unguja_Island_Chwaka2Chwaka2Control0.5501080.0784.90
Unguja_Island_Chwaka2Chwaka2Seaweed Farm Treatment0.4801058.0240.30
Unguja_Island_Chwaka2Chwaka2Seaweed Farm Treatment0.4501170.0165.30
Unguja_Island_Chwaka2Chwaka2Seaweed Farm Treatment0.4501143.073.18
Unguja_Island_Chwaka2Chwaka2Control0.5501169.0836.20
Unguja_Island_Chwaka2Chwaka2Control0.6201101.0723.40
Unguja_Island_Chwaka2Chwaka2Control0.5501104.0818.10
Unguja_Island_Chwaka2Chwaka2Seaweed Farm Treatment0.520972.973.24
Unguja_Island_Chwaka2Chwaka2Seaweed Farm Treatment0.540999.751.97
Unguja_Island_Chwaka2Chwaka2Seaweed Farm Treatment0.5401046.077.36
Unguja_Island_Chwaka2Chwaka2Control0.4501083.0829.10
Unguja_Island_Chwaka2Chwaka2Control0.480959.5703.50
Unguja_Island_Chwaka2Chwaka2Control0.500981.2800.10
Unguja_Island_Chwaka3 Chwaka3Seaweed Farm Treatment0.350665.139.48
Unguja_Island_Chwaka3Chwaka3Seaweed Farm Treatment0.300648.947.04
Unguja_Island_Chwaka3Chwaka3Seaweed Farm Treatment0.320593.1128.20
Unguja_Island_Chwaka3Chwaka3Control0.300541.2491.80
Unguja_Island_Chwaka3Chwaka3Control0.200529.1506.90
Unguja_Island_Chwaka3Chwaka3Control0.350517.7493.60
Unguja_Island_Chwaka3Chwaka3Seaweed Farm Treatment0.250510.695.85
Unguja_Island_Chwaka3Chwaka3Seaweed Farm Treatment0.120495.9104.50
Unguja_Island_Chwaka3Chwaka3Seaweed Farm Treatment0.250494.5112.30
Unguja_Island_Chwaka3Chwaka3Control0.200528.0447.70
Unguja_Island_Chwaka3Chwaka3Control0.150489.0436.90
Unguja_Island_Chwaka3Chwaka3Control0.080584.4465.00
Unguja_Island_Chwaka3Chwaka3Seaweed Farm Treatment0.200690.6162.50
Unguja_Island_Chwaka3Chwaka3Seaweed Farm Treatment0.1701213.0360.82
Unguja_Island_Chwaka3Chwaka3Seaweed Farm Treatment0.100685.6163.50
Unguja_Island_Chwaka3Chwaka3Control0.170763.6702.50
Unguja_Island_Chwaka3Chwaka3Control0.200656.6606.90
Unguja_Island_Chwaka3Chwaka3Control0.200679.6629.80
Unguja_Island_Chwaka5 Chwaka5Seaweed Farm Treatment0.2001782.0111.90
Unguja_Island_Chwaka5Chwaka5Seaweed Farm Treatment0.3001836.032.29
Unguja_Island_Chwaka5Chwaka5Seaweed Farm Treatment0.3001796.081.50
Unguja_Island_Chwaka5Chwaka5Control0.3501810.01430.00
Unguja_Island_Chwaka5Chwaka5Control0.3001871.01467.00
Unguja_Island_Chwaka5Chwaka5Control0.2001818.01314.00
Unguja_Island_Chwaka5Chwaka5Seaweed Farm Treatment0.2001662.0145.50
Unguja_Island_Chwaka5Chwaka5Seaweed Farm Treatment0.3001680.0118.20
Unguja_Island_Chwaka5Chwaka5Seaweed Farm Treatment0.3001737.030.09
Unguja_Island_Chwaka5Chwaka5Control0.1001711.01515.00
Unguja_Island_Chwaka5Chwaka5Control0.2001652.01606.00
Unguja_Island_Chwaka5Chwaka5Control0.2001719.01541.00
Unguja_Island_Chwaka5Chwaka5Seaweed Farm Treatment0.0001643.0109.50
Unguja_Island_Chwaka5Chwaka5Seaweed Farm Treatment0.0501687.085.20
Unguja_Island_Chwaka5Chwaka5Seaweed Farm Treatment0.1501711.056.62
Unguja_Island_Chwaka5Chwaka5Control0.3001902.01499.00
Unguja_Island_Chwaka5Chwaka5Control0.2501840.01513.00
Unguja_Island_Chwaka5Chwaka5Control0.1501849.01674.00