COSTECH Integrated Repository

Stable carbon and nitrogen isotopic signatures of organic matter sources in near-shore areas of Lake Victoria, East Africa

Show simple item record

dc.creator Machiwa, John F.
dc.date 2015-12-15T12:46:00Z
dc.date 2015-12-15T12:46:00Z
dc.date 2010
dc.date.accessioned 2021-05-03T13:36:17Z
dc.date.available 2021-05-03T13:36:17Z
dc.identifier Machiwa, J.F. 2010 Stable carbon and nitrogen isotopic signatures of organic matter sources in the southern part of Lake Victoria. Journal of Great Lakes Research 36: 1 – 8.
dc.identifier 0380-1330
dc.identifier http://hdl.handle.net/123456789/130
dc.identifier.uri http://hdl.handle.net/123456789/47585
dc.description Stable isotope ratios of organic carbon and nitrogen (δ13C and δ15N) were measured in suspended particulate matter (SPM) and sediment in the near-shore areas of Tanzanian waters of Lake Victoria (LV) to identify the various sources of organic matter in different areas of the lake. Spatial variations in δ13C, δ15N, and C/N ratios in SPM and sediments in inshore areas were due to differences in the proportions and sources of autochthonous or allochthonous matter. Watershed characteristics, such as urbanization, and lake characteristics, such as algal blooms, also immensely influenced the stable isotope signal of the organic matter in sediments. Stable C and N ratios showed that inshore areas in bays without pronounced fluvial input were dominated by autochthonous planktonic organic matter; conversely, for bays receiving significant fluvial inflows, the composition of organic matter depended on the extent of preservation of shoreline vegetation. Signals resulting from input of anthropogenic organic waste as a result of urbanization were distinguishable from natural sources. This work demonstrates the potential to discriminate between input sources of organic material into lakes using stable isotope signals in sediment and suspended particulate matter.
dc.description Lake Victoria Environmental Management Project (LVEMP).
dc.language en
dc.publisher Elsevier B.V.
dc.subject Lake Victoria
dc.subject Total nitrogen
dc.subject Organic carbon
dc.subject Stable isotopes
dc.subject Sediment
dc.subject Suspended particulate matter
dc.title Stable carbon and nitrogen isotopic signatures of organic matter sources in near-shore areas of Lake Victoria, East Africa
dc.type Journal Article
dc.type Journal Article, Peer Reviewed


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search COSTECH


Advanced Search

Browse

My Account