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UCL Home  /  Geography  /  News & Events  /  News  /  News Archive  /  October 2015  /  Flood pulses in the Okavango Delta

Flood pulses in the Okavango Delta

Richard’s fieldwork on unique river regime

Flood pulses in the Okavango Delta

This summer Richard Mazebedi travelled to Botswana to undertake his first PhD fieldwork  in the Okavango Delta, based at the Okavango Research Institute (ORI).

The overall objective of his research is to understand the importance of the annual flood pulse in the trophic interactions of aquatic organisms and energy processing in the Delta.

With the assistance of ORI field staff, he successfully undertook fieldwork in two stages - in June and in August. The objectives were to identify sampling sites, collect samples for stable isotope analyses and community characterization data, and to collect environmental data during high water conditions.

Richard was able to gather samples from 20 sites chosen from Lake Ngami, at the south-eastern part of the Okavango, and Chief’s Island, in the mid-part of the Delta. The stable isotope samples were collected from different trophic levels, from aquatic primary producers to the apex predator.

He also collected fish samples and aquatic macroinvertebrate samples for community analysis, measured physico-chemical parameters in the waters, and estimated the sedimentation rate and benthic colonization by algae using trapping techniques. In total, he acquired over 300 samples.

For more details of his research, click here.

See also: http://www.geog.ucl.ac.uk/about-the-department/news/news-archive-2014/july-2014/okavango-delta-placed-on-world-heritage-list

 


Image

Richard collecting samples


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