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Human impacts, climate change, and aquatic ecosystem response during the past 2000 yr at Lake Wandakara, Uganda

Published online by Cambridge University Press:  20 January 2017

James M. Russell ,
S.J. McCoy ,
D. Verschuren ,
I. Bessems  and
Y. Huang
James M. Russell*
Affiliation:
Department of Geological Sciences, Brown University, Box 1846, Providence, RI, 02912, USA
S.J. McCoy
Affiliation:
Department of Geological Sciences, Brown University, Box 1846, Providence, RI, 02912, USA
D. Verschuren
Affiliation:
Limnology Unit, Department of Biology, Ghent University, K. L. Ledeganckstraat 35, B 9000 Gent, Belgium
I. Bessems
Affiliation:
Limnology Unit, Department of Biology, Ghent University, K. L. Ledeganckstraat 35, B 9000 Gent, Belgium
Y. Huang
Affiliation:
Department of Geological Sciences, Brown University, Box 1846, Providence, RI, 02912, USA
*
⁎Corresponding author. E-mail address:[email protected] (J.M. Russell).
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Abstract

Analyses of carbon and hydrogen isotope ratios of terrestrial leaf waxes and the carbon and nitrogen abundance, ratio, and isotopic composition of bulk sediments from Lake Wandakara, a crater lake in western Uganda, East Africa, document human and climatic controls on the aquatic system and on the surrounding terrestrial vegetation during the past two millennia. Our data indicate that Wandakara was a relatively stable, productive lake surrounded by C3 vegetation from AD 70 to 1000. Abrupt changes in the δ13C of terrestrial leaf waxes indicate a series of abrupt shifts in the relative abundance of C3 and C4 vegetation caused by a combination of climate change and human activities around Wandakara beginning at AD 1000. Abrupt shifts in bulk sediment organic geochemistry, particularly C/N ratios and δ15N, indicate that human activities at this time caused permanent changes in the limnology of Lake Wandakara, including eutrophication. Our results suggest that the biogeochemistry of Lake Wandakara was more sensitive to shifting human impacts than to climate variations during the past millennium, highlighting the importance of understanding the intensity of pre-colonial human impacts on Africa's aquatic ecosystems.

Keywords

AfricaPaleoclimatePaleolimnologyHuman impactsHoloceneOrganic matter
Type
Research Article
Information
Quaternary Research , Volume 72 , Issue 3 , November 2009 , pp. 315 - 324
Copyright
University of Washington

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References

Abbott, M.B., and Wolfe, A.P. A 1300-year record of pre-Incan metallurgy recorded by lake sediments from the Bolivian Andes. Science (2003). Google Scholar
Alin, S.R., and Cohen, A.S. Lake-level history of Lake Tanganyika, East Africa, for the past 2500 years based on ostracode-inferred water-depth reconstruction. Palaeogeography, Palaeoclimatology, Palaeoecology 199, (2003). 31–49.Google Scholar
Appleby, P.G., and Oldfield, F. The calculation of 210Pb dates assuming a constant rate of supply of unsupported 210Pb to the sediment. Cantena 5, (1978). 1–8.Google Scholar
Bessems, I., (2007). Late-Holocene climatic reconstruction in equatorial East Africa: sedimentology and stable isotope geochemistry of lake deposits. Universiteit Gent.Google Scholar
Bessems, I., Verschuren, D., Russell, J.M., Hus, J., and Cumming, B. Paleolimnological evidence for widespread late-18th century drought across equatorial East Africa. Palaeogeography, Palaeoclimatology, Palaeoecology 259, (2008). 107–120.Google Scholar
Binford, M.W., Brenner, M., Whitmore, T.J., Higuera-Gundy, A., Deevey, E.S., and Leyden, B. Ecosystems, paleoecology, and human disturbance in subtropical and tropical America. Quaternary Science Reviews 6, (1987). 115–128.CrossRefGoogle Scholar
Bishop, W.W. Quaternary geology and geomorphology in the Albertine Rift Valley, Uganda. Geologic Society of America Special Publication 48, (1965). 293–320.Google Scholar
Bonnefille, R., and Chalié, F. Pollen-inferred precipitation time-series from equatorial mountains, Africa, the last 40 kyr BP. Global Planetary Change 26, (2000). 1257–1266.Google Scholar
Chikaraishi, Y., and Naraoka, H. Compound-specific dD and d13C analyses of n-alkanes extracted from terrestrial and aquatic plants. Phytochemistry 63, (2003). 361–371.Google Scholar
Cohen, A.S., Lezzar, K.E., Cole, J., Dettman, D.L., Ellis, G.S., Eagle, M., Chorokoa, K., Plisnier, P.D., Langenberg, V., Michelo, V., and Zilifi, D. Late Holocene linkages between decade-scale climate variability and productivity at Lake Tanganyika, Africa. Journal of Paleolimnology 36, (2006). CrossRefGoogle Scholar
Cole, J.J., Caraco, N.F., Kling, G., and Kratz, T.K. Carbon dioxide supersaturation in the surface waters of lakes. Science 265, (1994). 1568–1570.Google Scholar
Collister, J.W., and Hayes, J.M. A preliminary study of the carbon and nitrogen isotope biogeochemistry of lacustrine sedimentary rocks from the Green River Formation, Wyoming, Utah, and Colorado. U.S. Geological Survey Bulletin A–G, (1991). C1–C16.Google Scholar
Craig, H. Isotopic variation in meteoric waters. Science 133, (1961). 1702–1703.CrossRefGoogle ScholarPubMed
Dansgaard, W. Stable isotopes in precipitation. Tellus 16, (1964). 436–468.Google Scholar
Eglinton, G., and Hamilton, R.J. Leaf epicuticular waxes. Science 156, (1967). 1332–1334.Google Scholar
Einsele, G., Yan, J., and Hinderer, M. Atmospheric carbon burial in modern lake basins and its significance for the global carbon budget. Global Planetary Change 30, (2001). 167–195.Google Scholar
Ekdahl, E., Teranes, J.L., Guilderson, T., Turton, C.L., McAndrews, J.H., Wittkop, C., and Stoermer, E.F. Prehistorical record of cultural eutrophication from Crawford Lake, Canada. Geology 32, (2004). 745–748.Google Scholar
François, R., Pilskaln, C.H., and Altabet, M. Seasonal variation in the nitrogen isotopic composition of sediment trap materials collected in Lake Malawi. Johnson, T.C., and Odada, E.O. The Limnology, Climatology, and Paleoclimatology of the East African Lakes. (1996). Gordon and Breach, Amsterdam. 241–250.Google Scholar
Fritz, S.C. Lake development and limnological response to prehistoric and historic land-use in Diss, Norfolk, U. K.. Journal of Ecology 77, (1989). 182–202.CrossRefGoogle Scholar
Hamilton, A.C. The interpretation of pollen diagrams from highland Uganda. Palaeoecology of Africa 7, (1972). 45–149.Google Scholar
Hecky, R.E., and Kling, H.J. Phytoplankton ecology in the great lakes of the rift valleys of central Africa. Archiv fur Hydrobiologie Ergebisse Limnologie 25, (1987). 3–34.Google Scholar
Hecky, R.E., Campbell, P., and Hendzel, L.L. The stoichiometry of carbon, nitrogen, and phosphorus in particulate matter of lakes and oceans. Limnology and Oceanography 38, (1993). 1476–1481.Google Scholar
Hedges, J.I., Keil, R.G., and Benner, R. What happens to terrestrial organic matter in the ocean?. Organic Geochemistry 27, (1997). 195–212.Google Scholar
Hou, J., D'Andrea, W., MacDonald, D., and Huang, Y. Hydrogen isotope variability in leaf waxes among terrestrial and aquatic plants around Blood Pond, Massachusetts (USA). Organic Geochemistry 38, (2007). 977–984.Google Scholar
Hou, J., D'Andrea, W., and Huang, Y. Can sedimentary leaf waxes record D/H ratios of continental precipitation? Field, model, and experimental assessments. Geochimica et Cosmochimica Acta 72, (2008). 3503–3517.Google Scholar
Huang, Y., Dupont, L., Sarnthein, M., Hayes, J.M., and Eglinton, G. Mapping of C4 plant input from North West Africa into North East Atlantic sediments. Geochimica et Cosmochimica Acta 64, (2000). 3505–3513.Google Scholar
Huang, Y., Shuman, B., Wang, Y., and Webb, T. Hydrogen isotope ratios of palmitic acid in lacustrine sediments record late-Quaternary climate variations. Geology 30, (2002). 1103–1106.Google Scholar
Huang, Y., Shuman, B., Wang, Y., and Webb, T. Hydrogen isotope ratios of individual lipids in lake sediments as novel tracers of climatic and environmental change: a surface sediment test. Journal of Paleolimnology 31, (2004). 363–375.Google Scholar
Lamb, H.F., Derbyshire, I., and Verschuren, D. Vegetation response to rainfall variation and human impact in central Kenya during the past 1100 years. Holocene 13, (2003). 285–292.CrossRefGoogle Scholar
Liu, W., Huang, Y., An, Z., Clemens, S.C., Li, L., Prell, W.L., and Ning, Y. Summer monsoon intensity controls C4/C3 plant abundance during the last 35 ka in the Chinese Loess Plateau: carbon isotope evidence from bulk organic matter and individual leaf waxes. Palaeogeography, Palaeoclimatology, Palaeoecology 220, (2005). 243–257.Google Scholar
Marchant, R., and Taylor, D. Dynamics of montane forest in central Africa during the late Holocene: a pollen-based record from western Uganda. Holocene 8, (1998). 375–381.CrossRefGoogle Scholar
Melack, J.M. Morphometric, physical, and chemical features of the volcanic crater lakes of Western Uganda. Archiv fur Hydrobiologie 85, (1978). 430–453.Google Scholar
Meyers, P.A. Preservation of elemental and isotopic source identification of sedimentary organic matter. Chemical Geology 144, (1994). 289–302.Google Scholar
Meyers, P.A. Organic geochemical proxies of paleoceanographic, paleolimnologic, and paleoclimatic processes. Organic Geochemistry 27, (1997). 213–250.Google Scholar
Meyers, P.A., and Ishiwarty, R. Lacustrine organic geochemistry — an overview of indicators of organic matter sources and diagenesis in lake sediments. Organic Geochemistry 20, (1993). 867–900.Google Scholar
Meyers, P.A., and Teranes, J.L. Sediment organic matter. Last, W.M., and Smol, J.P. Tracking Environmental Change Using Lake Sediments. (2001). Kluwer Academic Publishers, Dordrecht.Google Scholar
Muzuka, A.N.N. Isotopic compositions of tropical East African flora and their potential as source indicators of organic matter in coastal marine sediments. Journal of African Earth Sciences 28, (1999). 757–766.Google Scholar
Nicholson, S.E. A review of climate dynamics and climate variability in Eastern Africa. Johnson, T.C., and Odada, E.O. The Limnology, Climatology, and Paleoclimatology of the East African Lakes. (1996). Gordon and Breack Publishers, Amsterdamn. 25–56.Google Scholar
Prahl, F.G., Bennett, J.T., and Carpenter, R. The early diagenesis of aliphatic hydrocarbons and organic matter in sedimentary particulates from Dabob Bay, Washington. Geochimica et Cosmochimica Acta 44, (1980). Google Scholar
Reimer, P.J., Baillie, M.G.L., Bard, E., Bayliss, A., Beck, J.W., Bertrand, C., Blackwell, P.G., Buck, C.E., Burr, G.S., Cutler, K.B., Damon, P.E., Edwards, R.L., Fairbanks, R.G., Friedrich, M., Guilderson, T., Hogg, A.G., Hughen, K.A., Kromer, B., McCormac, F.G., Manning, S.W., Ramsey, C.B., Reimer, R.W., Remmele, S., Southon, J.R., Stuiver, M., Talamo, S., Taylor, F.W., van der Plicht, J., and Weyhenmeyer, C.E. IntCal04 terrestrial radiocarbon age calibration 26–0 ka BP. Radiocarbon 46, (2004). 1029–1058.Google Scholar
Renberg, I., Korsman, T., and Birks, H.J.B. Prehistoric increases in the pH of acid sensitive Swedish lakes caused by land-use changes. Nature 362, (1993). 824–827.Google Scholar
Robertshaw, P., Taylor, D., Doyle, S., and Marchant, R. Famine, climate, and crisis in Western Uganda. Battarbee, R.W., Gasse, F., and Stickley, C.E. Past Climate Variability through Europe and Africa. (2004). Developments Palaeoenvironmental Research, Springer, Dordrecht. 535–547.Google Scholar
Russell, J.M., and Johnson, T.C. A high-resolution geochemical record from Lake Edward, Uganda-Congo, and the timing and causes of tropical African drought during the late Holocene. Quaternary Science Reviews 24, (2005). 1375–1389.Google Scholar
Russell, J.M., and Johnson, T.C. The water balance and stable isotope hydrology of Lake Edward, Uganda-Congo. Journal of Great Lakes Research 32, (2006). 77–90.CrossRefGoogle Scholar
Russell, J.M., and Johnson, T.C. Little Ice Age drought in equatorial Africa: ITCZ migrations and ENSO variability. Geology 35, (2007). 21–24.Google Scholar
Russell, J.M., and Werne, J.P. The use of solid phase extraction columns in fatty acid purification. Organic Geochemistry 38, (2007). 48–51.CrossRefGoogle Scholar
Russell, J.M., Eggermont, H.E., and Verschuren, D. Spatial complexity of Little Ice Age climate in East Africa: sedimentary records from two crater lake basins in Western Uganda. Holocene 17, (2007). 183–193.Google Scholar
Ryves, D.B., Mills, K., Bennike, O., Brodersen, K.P., Lamb, A.L., Leng, M.J., Russell, J.M., Ssemmanda, I., in revision. Testing the coherence of paired lakes to environmental change: a late Holocene multiproxy palaeolimnological study from two crater lakes in western Uganda. Quaternary Science Reviews.Google Scholar
Schefuß, E., Schouten, S., and Schneider, R.R. Climatic controls on central African hydrology during the past 20,000 years. Nature 437, (2005). 1003–1006.Google Scholar
Schelske, C.L., and Hodell, D.A. Using carbon isotopes of bulk sedimentary organic matter to reconstruct the history of nutrient loading and eutrophication in Lake Erie. Limnology and Oceanography 40, (1995). 918–929.Google Scholar
Sessions, A.L., Burgoyne, T.W., Schimmelmann, A., and Hayes, J.M. Fractionation of hydrogen isotopes in lipid biosynthesis. Organic Geochemistry 30, (1999). 1193–1200.Google Scholar
Ssemmanda, I., Ryves, D.B., Bennike, O., and Appleby, P.G. Vegetation history in western Uganda during the last 1200 years: a sediment-based reconstruction from two crater lakes. Holocene 15, (2005). 119–132.Google Scholar
Stager, J.C., Ryves, D.B., Cumming, B., Meeker, L., and Beer, J. Solar variability and the levels of Lake Victoria, East Africa, during the last millennium. Journal of Paleolimnology 33, (2005). 243–251.Google Scholar
Stuiver, M., Reimer, P.J., Bard, E., Beck, J.W., Burr, G.S., Hughen, K.A., Kromer, B., McCormac, F.G., van der Plicht, J., and Spurk, M. INTCAL98 radiocarbon age calibration, 24,000–0 cal BP. Radiocarbon 40, (1998). 1041–1083.Google Scholar
Sutton, J.E.G. The growth of farming communities in Africa from the equator southwards. Azania 29, /30 (1995). 1–332.Google Scholar
Sutton, J.E.G. Ntusi and Bigo: farmers, cattle-herders, and rulers in western Uganda, AD 1000–1500. Azania 33, (1998). 39–72.Google Scholar
Talbot, M.R. Nitrogen isotopes in paleolimnology. Last, W.M., and Smol, J.P. Tracking Environmental Change using Lake Sediments Volume 2: Physical and Geochemical Methods. (2001). Kluwer Acadmic Publishers, Dordrecht. 401–440.Google Scholar
Talbot, M.R. A review of the paleohydrological interpretation of carbon and oxygen isotopic ratios in primary lacustrine carbonates. Chemical Geology (Isotope Geoscience Section) 80, (1990). 261–279.Google Scholar
Talbot, M.R., and Johannessen, T. A high resolution paleoclimatic record for the last 27,500 years in tropical West Africa from the carbon and nitrogen isotopic composition of lacustrine organic matter. Earth Planetary Sciences Letter 110, (1992). 23–37.Google Scholar
Talbot, M.R., and Lærdal, T. The late Pleistocene–Holocene paleolimnology of Lake Victoria, East Africa, based upon elemental and isotopic analyses of sedimentary organic matter. Journal of Paleolimnology 23, (2000). 141–164.CrossRefGoogle Scholar
Talbot, M.R., Jensen, N.B., Laerdal, T., and Filippi, M.L. Geochemical responses to a major transgression in giant African lakes. Journal of Paleolimnology 35, (2006). 467–489.Google Scholar
Taylor, D. Environmental change in montane southwest Uganda: a pollen record for the Holocene from Ahakagyezi Swamp. Holocene 3, (1993). 324–332.Google Scholar
Taylor, D., Marchant, R., and Robertshaw, P. A sediment-based history of medium altitude forest in central Africa: a record from Kabata Swamp, Ndale volcanic field, Uganda. Journal of Ecology 87, (1999). 303–315.Google Scholar
Taylor, D., Robertshaw, P., and Marchant, R. Environmental change and political upheaval in precolonial western Uganda. Holocene 10, (2000). 527–536.Google Scholar
Teranes, J.L., and Bernasconi, S.M. The record of nitrate utilization and productivity limitation provided by δ15N values in lake organic matter — a study of sediment trap and core sediments from Baldeggersee, Switzerland. Limnology and Oceanography 45, (2000). 801–813.Google Scholar
Verschuren, D. Decadal and century-scale climate variability in tropical Africa during the past 2,000 years. Battarbee, R.W. Past Climate Variability Through Europe and Africa. (2004). Elsevier Paleoenvironmental Research Book Series, Amsterdam.Google Scholar
Verschuren, D., Laird, K.R., and Cumming, B. Rainfall and drought in equatorial East Africa during the past 1,100 years. Nature 403, (2000). 410–414.Google Scholar
Vuille, M., Werner, M., Bradley, R.S., and Keimig, F. Stable isotopes in precipitation in the Asian monsoon region. Journal of Geophysical Research 110, (2005). 108 Google Scholar
White, F. The Vegetation of Africa. A Descriptive Memoir to Accompany the UNESCO/AETFAT/UNSO Vegetation Map of Africa. (1983). UNESCO, Paris.Google Scholar