#10817 Intermediate zone, Kipili Basin, Lake Tanganyika, Tanzania

Environment

Surrounding area

The Kipili Basin is located in the southern region of Lake Tanganyika within the East African Rift Valley. Above the waterline, the shoreline is characterised by rocky headlands, small sandy beaches, and sparse woodland vegetation. The surrounding landscape consists of steep hills, exposed rock formations, and rugged terrain that descends directly into the lake, creating a complex interface between terrestrial and aquatic environments.

The combination of rocky shorelines, shallow littoral zones, and deeper offshore habitats contributes to the exceptional ecological diversity of the Kipili Basin, supporting one of the most species-rich fish communities in the world.

This biotope faces several environmental threats, including climate change, which can alter water temperature, thermal stratification, and nutrient cycling within the lake ecosystem. Increasing human activity along the shoreline contributes to habitat degradation through sedimentation, deforestation, and localised pollution. Overfishing represents an additional pressure, potentially disrupting ecological balances and affecting native fish communities, including the highly specialised endemic species of Lake Tanganyika.

Underwater landscape

Below the surface, the habitat consists of a mosaic of rocky structures, scattered stones, and sandy areas. The transition zone between rock and sand provides shelter, feeding areas, and breeding sites for numerous cichlid species, including Telmatochromis vittatus. The water is exceptionally clear, allowing sunlight to penetrate to considerable depths and supporting the development of algae and aufwuchs biofilms on rocky surfaces, which form an essential component of the local food web.

Fishes:

• Altolamprologus compressiceps (Cichlidae)
• Bathybates hornii (Cichlidae)
• Benthochromis horii (Cichlidae)
• Callochromis macrops (Cichlidae)
• Callochromis sp. ‘pleurospilus Tanzania’ (Cichlidae)
• Chalinochromis cyanophleps (Cichlidae)
• Cunningtonia longiventralis (Cichlidae)
• Cyathopharynx sp. ‘Neon Streak’ (Cichlidae)
• Cyphotilapia gibberosa (Cichlidae)
• Cyprichromis leptosoma (Cichlidae)
• Cyprichromis sp. ‘leptosoma Jumbo’ (Cichlidae)
• Ectodus descampsii (Cichlidae)
• Eretmodus cyanostictus (Cichlidae)
• Jabarichromis pfefferi (Cichlidae)
• Julidochromis marksmithi (Cichlidae)
• Lamprologus callipterus (Cichlidae)
• Lamprologus lemairii (Cichlidae)
• Lamprologus ornatipinnis (Cichlidae)
• Lepidiolamprologus attenuatus (Cichlidae)
• Lepidiolamprologus sp. ‘meeli Kipili’ (Cichlidae)
• Neolamprologus brichardi (Cichlidae)
• Neolamprologus cylindricus (Cichlidae)
• Neolamprologus furcifer (Cichlidae)
• Neolamprologus sexfasciatus (Cichlidae)
• Neolamprologus sp. ‘caudopunctatus Kipili’ (Cichlidae)
• Neolamprologus tetracanthus (Cichlidae)
• Ophthalmotilapia boops (Cichlidae)
• Ophthalmotilapia cf. nasuta (Cichlidae)
• Paracyprichromis brieni (Cichlidae)
• Paracyprichromis nigripinnis (Cichlidae)
• Perissodus microlepis (Cichlidae)
• Petrochromis sp. ‘kasumbe rainbow’ (Cichlidae)
• Petrochromis sp. ‘red Mpimbwe’ (Cichlidae)
• Petrochromis sp. ‘Texas blue’ (Cichlidae)
• Shuja horei (Cichlidae)
• Telmatochromis vittatus (Cichlidae)
• Tropheus sp. ‘Kipili’ (Cichlidae)
• Xenochromis hecqui (Cichlidae)
• Xenotilapia boulengeri (Cichlidae)
• Xenotilapia flavipinnis (Cichlidae)
• Xenotilapia sp. ‘papilio sunflower’ (Cichlidae)
• Xenotilapia spilopterus (Cichlidae)

Threats to ecology

This biotope faces several threats, including climate change, which affects water temperature, stratification, and nutrient cycling within the lake. Additional pressures arise from increasing human populations along the shoreline, leading to habitat degradation, sedimentation, deforestation, and localized pollution. Overfishing may also alter ecological balances and impact native fish communities.

Bibliography

• → Environ Fluid Mech 23, 103–123 (2023) - The impact of seasonal variability and climate change on lake Tanganyika’s hydrodynamics by Kevin Sterckx, Philippe Delandmeter, Jonathan Lambrechts, Eric Deleersnijder, Piet Verburg & Wim Thiery
  
• → AAPG Bulletin, 80(3), 382-409 - Textural and compositional variability across littoral segments of Lake Tanganyika: The effect of asymmetric basin structure on sedimentation in large rift lakes by Soreghan, M. J., & Cohen, A. S.
  
• → Proc Natl Acad Sci U S A. 2016 Aug 23;113(34):9563-8 - Climate warming reduces fish production and benthic habitat in Lake Tanganyika, one of the most biodiverse freshwater ecosystems by Cohen AS, Gergurich EL, Kraemer BM, McGlue MM, McIntyre PB, Russell JM, Simmons JD, Swarzenski PW
  
• → Journal of Great Lakes Research, Volume 46, Issue 2, 2020, Pages 243-254 - Geophysical benthic habitat mapping in Lake Tanganyika (Tanzania): Implications for spatial planning of small-scale coastal protected areas by Joseph S. Lucas, Michael M. McGlue, Ismael A. Kimirei, Michael J. Soreghan, Athanasio Mbonde, Kevin M. Yeager, Peter Limbu, Colin Apse, Peter B. McIntyre
  
• → Nature 424, 766–768 (2003) - Climate change decreases aquatic ecosystem productivity of Lake Tanganyika, Africa by O'Reilly, Catherine M. ; Alin, Simone R.; Plisnier, Pierre-Denis; Cohen, Andrew S.; McKee, Brent A.
  
• → Quaternary Science Advances, Volume 3, 2021, 100023 - Climate, vegetation, and weathering across space and time in Lake Tanganyika (tropical eastern Africa) by Sarah J. Ivory, Michael M. McGlue, Cara Peterman, Patrick Baldwin, Joseph Lucas, Andrew Cohen, James Russell, Justina Saroni, Emma Msaky, Ishmael Kimirei, Michael Soreghan
  
• → Journal of Great Lakes Research, Volume 46, Issue 5, 2020, Pages 1067-1078 - The taxonomic diversity of the cichlid fish fauna of ancient Lake Tanganyika, East Africa by Fabrizia Ronco, Heinz H. Büscher, Adrian Indermaur, Walter Salzburger
  
• → Hydrobiologia 407, 45–58 (1999) - Limnological annual cycle inferred from physical-chemical fluctuations at three stations of Lake Tanganyika by P.-D. Plisnier, D. Chitamwebwa, L. Mwape, K. Tshibangu, V. Langenberg & E. Coenen
  
• → Limnology and Oceanography, 38 - Nutrient chemistry of the water column of Lake Tanganyika by J. M. Edmond, R. F. Stallard, H. Craig, V. Craig, R. F. Weiss, G. W. Coulter
  

Sitography