Abstract
The Holocene record of Lake Lugano (southern basin: surface area 20.3 km2, maximum depth 87 m) comprising organic carbon-rich sediments (sapropels), is divided into eight intervals based on radiocarbon- and varve-dating. The content of organic carbon, inorganic carbon, and biogenic silica, as well as the benthic remains of ostracods and oligochaetes, are converted into accumulation rates and benthic abundances in order to assess past production rates and bottom water oxygen status, respectively. The results suggest three periods of distinct palaeolimnological character: (i) low primary production combined with shifts between aerobic and anaerobic profundal conditions (prior to ca. 3000 BC), (ii) moderate rates of production combined with a relatively high profundal oxygen content (after ca. 1500 BC), and (iii), high production rates (460 g C m−2 a−1) combined with anaerobic profundal conditions (present eutrophic state). Corresponding organic carbon contents in the sediments are: up to 5% (i), 4% (ii), and 8% (iii). Until the beginning of this century, the flux of autochthonous sediments to the lake floor correlated with the fluctuations in the allochthonous sediment accumulation rate, indicating that catchment erosion largely controlled lacustrine production during the Holocene history of Lake Lugano. Pollen data show catchment-vegetational transformations at ca. 3500 BC (change from fir to beech forests), at 1400 BC (onset of cereal vegetation) and at ca. A.D. 450 (strong increase in various cultural plants). The first two changes had a relatively large imprint on lacustrine sedimentation. At ca. 3500 BP, erosion increase in the catchment was triggered by vegetation changes in the mountain zone above ca. 1000 m a. s. l., which may have been induced by climatic and human alteration (drop in the treeline altitude). Maximum catchment erosion occurred at ca. 1400 BC which was clearly dominated by human cultivation during the Bronze Age. More oxygenated profundal conditions in the lake after ca. 3000 BC are possibly related to a better mixing of the lake waters during the winter season by increased wind activity.
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References
Barbieri, A. and Martini, L.: Caratteristiche, fisiche e chimiche delle acque lacustri. In: Peduzzi, R. (Ed.): Studio sull'entrofizzazione del Lago di Lugano. Rapporti Commissione Internazionale per la protezione delle acque italo-svizzere, Campagna 1982, 31–40 (1982).
Berner, R. A.: Principles of Chemical Sedimentology. McGraw-Hill, New York, 240 pp (1971).
Bonacina, C., Bonomi, G. and Monti, C.: Oligochaete cocoon remains as evidence of past lake pollution. — Hydrobiologia, 143:395–400 (1986).
Bralower, T. J. and Thierstein, H. R.: Organic carbon and metal accumulation rates in Holocene and mid-Cretaceous sediments: palaeoceanographic significance. In: Brooks, J. & Fleet, A. J. (Eds.): Marine Petroleum Source Rocks. Geological Society Special Publication, 26, 345–369 (1987).
Brown, L., Sacks, I. S., Tera, F., Klein, J. and Middleton, R.: Beryllium-10 in continental sediments. — Earth Planet. Sci. Lett., 55, 370–376 (1981).
Demaison, G. J. and Moore, G. T.: Anoxic environments and oil source bed genesis. Organic Geochemistry, 2, 9–31 (1980).
Geologisches Institut der ETHZ: Sedimentologische Untersuchungen im Luganersee. Bericht zu Handen des Kanton Tessin (Dipartimento Ambiente), unpublished, 25 pp (1984).
Hollander, D. J.: Carbon and Nitrogen Isotopic Cycling and Organic Geochemistry of Eutrophic Lake Greifen: Implications for Preservation and Accumulation of Ancient Organic Carbon-Rich Sediments. Mitt. Geol. Inst. ETH und Universität Zürich, Neue Folge, 279, 317 pp (1989).
Jaag, O. and Märki, E.: Die neuere Entwicklung und der derzeitige Zustand der schweizerischitalienischen Grenzgewässer. Wasser- und Energiew. 60, 234–247 (1968).
Kelts, K.: Environments of deposition of lacustrine petroleum source rocks: an introduction. — In: Fleet, A. J., Kelts, K. and Talbot, M. R. (Eds.): Lacustrine Petroleum Source Rocks. Geological Society Special Publication, 40, 3–26, London (1988).
Kelts, K. & Hsü, K. J.: Freshwater Carbonate Sedimentation. — In: Lerman (Ed.): Lakes. Springer, New York, 295–323 (1978).
Lang, C.: Eutrophication of Lakes Léman and Neuchâtel (Switzerland) indicated by oligochaete communities. Hydrobiologia 115, 131–138 (1984).
Lang, C.: Eutrophisation du Léman indiquée par les communautés d'oligochètes: campagnes 1982–1985. Schweiz. Z. Hydrol. 48/2, 230–239 (1986).
Lang, G.: Holozäne Veränderungen der Waldgrenze in den Schweizer Alpen — Methodische Ansätze und gegenwärtiger Kenntnisstand. Diss. Bot. (in press).
Lauritsen, D. D., Mozley, S. C. and White, D. S.: Distribution of oligochaetes in Lake Michigan and comments on their use as indices of pollution. J. Great Lakes Res. 11(1), 67–76 (1985).
Linik, Suess, Becker, Stuiver, Kromer, Ferguson, Rhein, Schoch, Munnich and Loxx: Average Dataset of LSB, SKBF, KRBSMSB/20 years steps. Radiocarbon, 28 (2B), 805–1021 (1986).
Lister, G. S.: Lithostratigraphy of Zübo sediments. Contr. Sedimentology, 13, 31–58 (1984).
Lister, G. S.: Stable isotopes from lacustrine Ostracoda as tracers for continental palaeoenvironments. In: De Deckker, P., Colin J.-P. & Peypouquet J.-P. (eds) Ostracoda in Earth Sciences. Elsevier, 201–218 (1988).
Lotter, A. F.: Evidence of annual layering in Holocene sediments of Soppensee, Switzerland. Aquatic Sciences 51/1, 19–30 (1989).
McKenzie, J. A.: Carbon isotopes and productivity in the lacustrine and marine environment. In: Stumm, W (Ed.): Chemical processes in lakes. John Wiley, New York, 99–117 (1985).
Meybeck, M.: Carbon, nitrogen, and phosphorus transport by world rivers. Am. J. Science 282, 401–450 (1982).
Niessen, F. and Sturm, M.: Die Sedimente des Baldeggersees (Schweiz). — Ablagerungsraum und Eutrophierungsentwicklung während der letzten 100 Jahre. — Arch. Hydrobiol. 108(3), 365–383 (1987).
Niessen, F.: Sedimentologische, geophysikalische und geochemische Untersuchungen zur Entstehung und Ablagerungsgeschichte des Luganersees (Schweiz). Mitt. Geol. Inst. Eidg. Technische Hochschule und der Universität Zürich, Neue Folge 268, 332 pp (1987).
Niessen, F. and K. Kelts: The deglaciation and Holocene sedimentary evolution of southern perialpine Lake Lugano — implications for Alpine paleoclimate. Eclogae geol. Helv. 82/1, 235–236 (1989).
Niessen, F.: Die Sedimente des Luganersees: Chronik wechselnder Einflüsse von Klima und Mensch. Proceedings International Symposium “Limnological Aspects and Management of the Lake of Lugano”. Laboratorio Studi Ambientali, Dipartimento Ambiente, Bellinzona, 1–12 (1990).
Pavich, M. J., L. Brown, J. N. Valette-Silver, J. Klein and R. Middleton:10Be analysis of a Quarternary weathering profile in the Virginia Piedmont. Geology 13(1), 39–41 (1985).
Pedersen, T. F. and S. E. Calvert: Anoxia vs. Productivity: What Controls the Formation of Organic-Rich Sediments and Sedimentary Rocks? The American Association of Petroleum Geologists Bulletin 74(4), 454–466 (1990).
Peduzzi, R.: Discussione e conclusioni. In: R. Peduzzi (Ed.): Studio sull'eutrofizzazione del Lago di Lugano. Rapporti Commissione Internazionale per la protezione delle acque italo-svizzere, Campagna 1981, 75–84 (1981).
Pokras, E. M.: Preservation of fossil diatoms in Atlantic sediment cores: control by supply rate. Deep-Sea Res. 33 (7), 893–902 (1986).
Probst, L.: Sublittoral and profundal Oligochaeta fauna of Lake Constance (Bodensee-Obersee). Hydrobiologia 155, 277–282 (1987).
Rhoads, D. C. & J. W. Morse: Evolutionary and ecologic significance of oxygen-deficient marine basins. Lethaia 4, 413–428 (1971).
Rufli, H.: Produzione Primaria. In: R. Peduzzi (Ed.) Studio sull'eutrofizzazione del Lago di Lugano. Rapporti Commissione Internazionale per la protezione delle acque italo-svizzere, Campagna 1981, 59–61 (1982).
Rosenberg, R.: Benthic macrofaunal dynamics, production and dispersion on an oxygen — deficient estuary of west Sweden. J. Exp. Mar. Biol. Ecol. 26, 107–133 (1977).
Savrda, C. E., D. J. Bottjer and D. S. Gorsline: Development of a comprehensive oxygen-deficient marine biofacies model: Evidence from Santa Monica, San Pedro, and Santa Barbara Basins, California continental borderland. The American Association of Petroleum Geologists Bulletin 68, 1179–1192 (1984).
Schelske, C. L., H. Züllig and M. Boucherle: Limnological investigation of biogenic silica sedimentation and silica biogeochemistry in Lake St. Moritz and Lake Zürich. Schweiz. Z. Hydrol. 49/1, 42–50 (1987).
Schneider, R.: Pollenanalytische Untersuchungen zur Kenntnis der spät- und postglazialen Vegetationsgeschichte am Südrand der Alpen zwischen Turin und Varese (Italien). Bot. Jb. Syst. 100, 26–109 (1978).
Schneider, R. and K. Tobolski: Lago di Ganna — Late-Glacial and Holocene environments of a lake in the southern alps. Diss. Bot. 87, 229–271 (1985).
Stuiver, M., T. F. Braziunas, B. Becker and B. Kromer: Climatic, Solar, Oceanic, and Geomagnetic Influences on Late-Glacial and Holocene Atmospheric14C/12C Change. Quaternary Research 35, 1–24 (1991).
Wick, L.: Pollenanalytische Untersuchungen zur spät- und postglazialen Vegetationsgeschichte am Luganersee (Südtessin, Schweiz). Eclogae Geol. Helv. 82/1, 265–276 (1989).
Wick, L.: Indagini paleoecologiche al Lago Basso, Pian dei Cavalli (area dello Spluga): primi risultati. — In: Fedele, F. et al.: Preistoria e paleoambienti della Valchiavenna: Pian dei Cavalli. Clavenna 30, 9–122 (1991).
Zoller, H.: Pollenanalytische Untersuchungen zur Vegetationsgeschichte der insubrischen Schweiz. Denkschr. Schweiz. Naturf. Ges. 83, 45–156 (1960).
Züllig, H.: Untersuchungen über die Stratigraphie von Carotinoiden im geschichteten Sediment von 10 Schweizer Seen zur Erkennung früherer Phytoplankton-Entfaltungen. Schweiz. Z. Hydrol. 44(1), 1–98 (1982).
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Niessen, F., Wick, L., Bonani, G. et al. Aquatic system response to climatic and human changes: Productivity, bottom water oxygen status, and sapropel formation in Lake Lugano over the last 10 000 years. Aquatic Science 54, 257–276 (1992). https://doi.org/10.1007/BF00878140
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DOI: https://doi.org/10.1007/BF00878140