Moreira-Saporiti, Agustín; Teichberg, Mirta (2022): Seegrass cover and shoot density and benthic macroalgae cover during the experiment in Chwaka Bay (Unguja Island, Zanzibar Archipelago, Tanzania) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.942686, 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:
Percentage cover and shoot density of seagrasses were measured taking three random points in each plot at each sampling time with 0.25 m2 and 0.01 m2 quadrats, respectively. Percentage cover was included as the only variable for the measurement of benthic macroalgae as macroalgae could not be assessed by shoot density. The Braun-Blanquet scale was used for the cover measurements (Mueller-Dombios and Ellenberg 1974), consisting of a scale of 8 numbers each one referring to an interval of percentage cover. The scale goes as follows: 0.1 = < 5% solitary, 0.5 = < 5% sparse, 1 = < 5% numerous, 2 = cover ≥ 5% - ≤ 25%, 3 = cover > 25% - ≤ 50%, 4 = cover > 50 - ≤ 75%, and 5 = cover > 75%. The cover categories were transformed into the midpoint cover range (Braun-Blanquet 1964). The final units is the percentage cover (%) of each seagrass species and macrolalgae in the quadrat. Shoot density was measured counting the individual shoots of the two seagrass species within the 0.01 m2 quadrat (Number of shoots per 0.01 square meters). The number of shoots were then standarized by square meter to obtain the final shoot density (number of shoots/m2).
Keyword(s):
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
Further details:
Braun-Blanquet, Josias (1964): Pflanzensoziologie: Grundzüge der Vegetationskunde (3rd ed.). Springer-Verlag Vienna, 866 pp, https://doi.org/10.1007/978-3-7091-8110-2
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: 2016-02-29T00:00:00
Minimum Elevation: 0.0 m * Maximum Elevation: 0.0 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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Moreira-Saporiti, Agustín | |||
| 2 | Site | Site | Moreira-Saporiti, Agustín | |||
| 3 | Experimental treatment | Exp treat | Moreira-Saporiti, Agustín | |||
| 4 | Block | Block | Moreira-Saporiti, Agustín | Treatment Block | ||
| 5 | Halophila stipulacea, shoot density | H. stipulacea shoot den | #/m2 | Moreira-Saporiti, Agustín | see description in data abstract | |
| 6 | Thalassia hemprichii, shoot density | T. hemprichii shoot den | #/m2 | Moreira-Saporiti, Agustín | see description in data abstract | |
| 7 | Macroalgae, cover | Macroalgae cov | % | Moreira-Saporiti, Agustín | see description in data abstract | Benthic |
| 8 | Thalassia hemprichii, cover | T. hemprichii cov | % | Moreira-Saporiti, Agustín | see description in data abstract | |
| 9 | Halophila stipulacea, cover | H. stipulacea cov | % | Moreira-Saporiti, Agustín | see description in data abstract |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1512 data points