 |
| Titel |
Limnocythere (Ostracoda) distribution pattern in the Southern Ethiopian Rift during the Late Pleistocene and Holocene |
| VerfasserIn |
Finn Viehberg, Tsige Gebru, Verena Foerster, Frank Schaebitz, Bernd Wagner |
| Konferenz |
EGU General Assembly 2014
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250100935
|
| Publikation (Nr.) |
 EGU/EGU2014-16960.pdf |
|
|
|
|
|
| Zusammenfassung |
| Sediment records from two lakes in the biodiversity hotspot of the Southern Ethiopian Rift
were retrieved, Lake Chamo (c. 9 ka) and Chew Bahir (c. 45 ka). Sedimentological and
palaeoecological proxies infer rapidly changing environmental conditions (wet-dry cycle)
such as the African Humid Period. The fossil record in both archives is fairly rich in
ostracode taxa throughout the cores and especially diverse in the genus Limnocythere.
Here, we discuss the temporal and spatial distribution pattern of Limnocythere species in the
Omo-Turkana basin in the context of palaeolimnological changes. In addition, we mapped
extensively valve characteristics of the L. species to document morphological intraspecific
variation also as a supplementary measure of environmental change. Our preliminary results
show that regional biogeographical boundaries might have changed as a consequence, too.
For instance, members of the Limnocythere thomasi –group (sensu Martens 1990) occur in
our fossil record. In modern studies this species cluster is regarded as endemic fauna of Lakes
Zway, Langano and Shala, which are associated with the freshwater ecoregion of the
Northern Eastern Rift. |
|
|
|
|
|
|