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Barnard College

Publication Date

Fall 2017

Program Name

Tanzania-Zanzibar: Coastal Ecology and Natural Resource Management


The declining seaweed industry coupled with efforts by the NGO Marine Cultures have led to the establishment of sponge mariculture in Jambiani, Zanzibar. However, growing cyanobacteria levels have substantially increased sponge mortality rates. In order to determine successful cyanobacteria mitigation treatments, six populations of farm ropes, support lines, and sponges were (a) untreated, (b) manually cleaned or submerged in solutions of (c) 2% hydrogen peroxide, (d) 4% hydrogen peroxide, (e) 50 g/L salt, or (f) 70 g/L salt. No conclusions were drawn from rope treatments, no techniques were effective for support line treatments, and both concentrations of hydrogen peroxide were successful for sponge treatments. Additionally, unstructured interviews were conducted with sponge farmers to ascertain longitudinal climate change and bacteria growth data in Jambiani.


Biodiversity | Environmental Indicators and Impact Assessment | Environmental Monitoring | Environmental Sciences | Oceanography | Research Methods in Life Sciences


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