Density of Tripneustes gratilla in different seagrass meadows in Changuu Island (Unguja Island, Zanzibar Archipelago, Tanzania)


To assess the sea urchin distribution across the seagrass species, we measured the sea urchin density in three monospecific meadows (T. ciliatum, C. serrulata and H. uninervis) and two mixed meadows (dominated by T. hemprichii and by S. isoetifolium) in the study site. We selected three patches per meadow type. Each patch was 25 square meters, delimited with a transect tape. We counted the number of sea urchins at high tide, and divided this number by the surface of the patch to calculate sea urchin density per square meter of meadow (individuals per square meter).

Related Identifier
Metadata Access
Creator Moreira-Saporiti, Agustín ; Teichberg, Mirta (ORCID: 0000-0003-1586-738X)
Publisher PANGAEA
Publication Year 2022
Funding Reference German Science Foundation, DFG TE 1046 3 1
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 90 data points
Discipline Earth System Research
Spatial Coverage (39.167 LON, -6.118 LAT); Zanzibar Archipealgo, Tanzania