Mid-late Holocene pollen evidence from the Ispani-II Sphagnum bog in lowland Western Georgia shows that 4500 years ago Castanea (chestnut)-dominated woods rapidly declined to be replaced by alder swamps and, later, during the first millennium bc, by open, marshy landscapes in which fire played a prominent part. Around 1900 years ago, Sphagnum blanket bog encroached on the marshes and dense Fagus-Carpinus (beech-hornbeam) forest enveloped the surrounding land. This vegetation remained until the mid-twentieth century, when forests were clear-felled and marshes were drained for large-scale, mechanized agriculture. Previous studies have emphasized climate’s governing role in setting the course of Holocene vegetation development in lowland Western Georgia, but our results provide little support for this hypothesis. To a much greater degree, episodes of coastal subsidence, sea-level rise and human impact have shaped the vegetation history of coastal Western Caucasus.
Akhalkatsi, M., Lorenz, R., Matchutadze, I. and Mosulishvili, M.2004: Spiranthes amoena a new species for Flora of Georgia. Journal Europäischer Orchideen36, 745-754.
2.
Aksu, A. E., Hiscott, R. N. and Yasar, D.1999: Oscillating Quaternary water levels of the Marmara Sea and vigorous outflow into the Aegean Sea from the Marmara Sea Black Sea drainage corridor. Marine Geology153, 275-302.
3.
AN GSSR (Akademiia Nauk Gruzinskoi SSR)1964: Atlas Gruzinskoi SSR (Atlas of the Georgian SSR). GUGK (in Russian).
4.
Apakidze, J. B.1991: Tsentralnaiia kolkhida v epokhy pozdnii bronzy-rannyevo zheleza (Central Colchis in the late Bronze and early Iron ages). Metsniereba.
5.
Atanassova, J.2005: Palaeoecological setting of the western Black Sea area during the last 15000 years. The Holocene15, 576-584.
6.
Badenkov, Y. P., Borunov, A. K., Mandych, A. F., Romashkevich, A. I. and Targulian, V. O.1990: Caucasia. In Turner, B. L., II, editor, The Earth as transformed by human actions: global and regional changes in the biosphere over the past 300 years. Cambridge University Press, 513-531.
7.
Ballard, R. D., Coleman, D. F. and Rosenberg, G. D.2000: Further evidence of abrupt Holocene drowning of the Black Sea shelf. Marine Geology170, 253-261.
8.
Behre, K.-E.1986: The interpretation of anthropogenic indicators in pollen diagrams. Pollen et Spores23, 225-245.
9.
Bengtsson, L. and Enell, M.1986: Chemical analysis. In Berglund, B. E., editor, Handbook of Holocene palaeoecology and palaeohydrology. John Wiley & Sons, 423-451.
10.
Bennett, K.D. 2002: PSIMPOLL 4.10. Uppsala Universitet, Department of Earth Sciences.
11.
Berg, L.S. 1950: Natural regions of the U.S.S.R. Macmillan.
12.
Birks, H. J. B. and Gordon, A. D.1985: Numerical methods in Quaternary pollen analysis. Academic Press.
13.
Braund, D.1994: Georgia in antiquity. Clarendon Press.
14.
Chepalyga, A. L.1984: Inland sea basins. In Velichko, A. A., editor, Late Quaternary environments of the Soviet Union. University of Minnesota Press, 229-247.
15.
Clark, R. L.1982: Point count estimation of charcoal in pollen preparations and thin sections of sediments. Pollen et Spores24, 523-535.
16.
Denk, T., Frotzler, N. and Davitashvili, N.2001: Vegetational patterns and distribution of relict taxa in humid temperate forests and wetlands of Georgia (Transcaucasia). Biological Journal of the Linnean Society72, 287-332.
17.
Dokturovskii, V. S.1931: O torfianikakh Zakavkaz’ia (On the peatbogs of Transcaucasia). Torfianoe Delo2, 29-32 (in Russian).
18.
Dokturovskii, V. S.1936: Materialy po izucheniiu torfianikov Zakavkaz’ia (Materials for the study of Transcaucasian peatbogs). Pochvovedenie2, 183-202 (in Russian).
19.
Dolukhanov, A. G.1966: Rastitel’nostii Pokrov (Vegetation cover). In Kavkaz. Nauka, 223-251 (in Russian).
20.
Dzhanelidze, C. P.1980: Paleogeografiia Gruzii v Golotsene (Holocene palaeogeography of Georgia). Metsniereba (in Russian).
21.
Fedorov, P. V.1988: The problem of changes in the level of the Black Sea during the Pleistocene. International Geology Review30, 635-641.
22.
Görür, N., Çağatay, M. N., Emre, öAlpar, B., Sak1nç, M., İslamoğlu, Y., Algan, O., Erkal, T., Keçer, M., Akkök, R. and Karl1k, G.2001: Is the abrupt drowning of the Black Sea shelf at 7150 yr BP a myth? Marine Geology176, 65-73.
23.
Grove, A. T. and Rackham, O.2001: The nature of Mediterranean Europe: an ecological history. Yale University Press.
24.
Gulisashvili, V. Z.1964: Prirodnye zony i estestvenno-istoricheskie oblasti Kavkaza (Natural zones and eco-historical regions of the Caucasus). Nauka.
25.
Gvilava, M., editor 1996: State of the environment Georgia. Geoinformation Center. http://enrin.grida.no//htmls/georgia/soegeor/hp_soege.htm (last accessed 11 October 2006).
26.
Hill, M. O.1979: DECORANA: a FORTRAN program for detrended correspondence analysis and reciprocal averaging. Cornell University.
27.
Huntley, B. and Birks, H. J. B.1983: An atlas of past and present pollen maps for Europe: 0 13 000 years ago. Cambridge University Press.
28.
Joosten, H., Kaffke, A. and Matchutadze, I.2003: The mires of the Kolkheti lowlands (Georgia). International Mire Conservation Group Newsletter2003/3, 19-23.
29.
Kaffke, A., Matchutadze, I., Couwenberg, J. and Joosten, H.2002: Early 20th century Russian peat scientists as possible vectors for the establishment of Calluna vulgaris in Georgian Sphagnum bogs. Suo53, 61-66.
30.
Kaplin, P. A. and Selivanov, A. O.2004: Lateglacial and Holocene sea level changes in semi-enclosed seas of North Eurasia: examples from the contrasting Black and White Seas. Palaeogeography, Palaeoclimatology, Palaeoecology209, 19-36.
31.
Ketskhoveli, N.1959: Sakartvelos Mtsenareuli Sapari (Georgia’s vegetation cover). SSSR Metsnierebata Akademiis Gamomtsemloba (in Georgian).
32.
Kikividze, Z. and Ohsawa, M.2001: Richness of Colchic vegetation: a comparison between refugia of south-western and East Asia. BMC Ecology1, 6-6.
33.
Kolakovskii, A. A.1961: Rastitel’nyi mir Kolkhidi (Plant world of Colchis). Izdatel’stvo Moskovskogo Universiteta (in Russian).
34.
Kolakovskii, A.A. 1980: Flora Abkhazii, tom 1 (Flora of Abkhazia, volume 1). Metsniereba (in Russian).
35.
Kushnareva, K. K.1997: The Southern Caucasus in prehistory. University of Pennsylvania.
36.
Kvavadze, E. V.1982: Novye dannye po stratigrafii i paleogeografii Golotsena Kolkhidskoi nizmennosti (New data for the stratigraphy and Holocene palaeogeography of the Colchis lowland). In Chetvertichnaia Sistema Gruzii, Metsniereba, 123-130 (in Russian).
37.
Kvavadze, E. V. and Dzheiranashvili, V. G.1987: Palinologicheskaia kharakteristika verkhnepleistotsenovykh i golotsenovykh otlozhenii Kobuleti (Palynological characteristics of Upper Pleistocene and Holocene sediments from Kobuleti). Soobshch. AN GSSR127, 189-192 (in Russian).
38.
Kvavadze, E. V. and Dzheiranashvili, V. G.1989: Palinologicheskaia kharakteristika Golotsenovykh otlozhenii shel’fa Chernogo Moria v raione Sukhumi (Palynological characteristics of Holocene Black Sea shelf sediments in the Sukhumi area). Soobshch. AN GSSR135, 201-204 (in Russian).
39.
Lordkipanidze, O. D.1994: Recent discoveries in the field of classical archaeology in Georgia. Ancient Civilizations1, 127-168.
40.
Matchutadze, I. 2004: The evidence for prehistoric climate and ecology in the Ispani excavations. The Black Sea region: past, present and future. Abstracts, British Academy Black Sea Initiative Conference, Istanbul Technical University: 14-16 October 2004. http://www.biaa.ac.uk/blackseaconference (last accessed 11 October 2006).
41.
Mikeladze, T. K. and Baramidze, M. B.1976: O nekotorykh itogakh polevykh issledovanii v Kolkhidskoi nizmennosti v zonakh novostroiek (Some results of fieldwork in the Colchis lowland construction zone). In Arkheologicheskii issledovaniia na novostroikakh Gruzinskoi SSR. Metsniereba, 95-101 (in Russian).
42.
Moore, P. D.1993: The origin of blanket mire, revisited. In Chambers, F. M., editor, Climate change and human impact on the landscape. Chapman and Hall, 217-224.
43.
Moore, P. D., Webb, J. A. and Collinson, M. E.1991: Pollen analysis. Blackwell Science Publishers.
44.
Mudie, P., Rochon, A., Aksu, A. and Gillespie, H.2002: Dinoflagellate cysts, freshwater algae, and fungal spores as salinity indicators in Late Quaternary cores from Marmara and Black Seas. Marine Geology190, 203-231.
45.
Nakhutsrishvili, G. S.1999: The vegetation of Georgia (Caucasus). Braun-Blanquetia15, 1-68.
46.
Neishtadt, M. I.1957: Istoriia lesov i paleogeografiia SSSR v Golotsene (Forest history and Holocene palaeogeography of the USSR). Izdat. AN SSSR (in Russian).
47.
Neishtadt, M. I., Khotinskiy, N. A., Devirts, A. L. and Markova, N. G.1965: Imnatskoe boloto, Gruzinskaia SSR (Imnati bog, Georgian SSR). In Paleogeografiia i khronologiia verkhnego pleistotsena i golotsena po dannym radiouglerodnogo metoda. Nauka, 105-112 (in Russian).
48.
Oksanen, J. and Minchin, P.1997: Instability of ordination results under changes in input data order: explanations and remedies. Journal of Vegetation Science8, 447-454.
49.
Röhrig, E.1991: Deciduous forests of the Near East. In Röhrig, E. and Ulrich, B., editors, Temperate deciduous forests. Ecosystems of the world, vol. 7. Elsevier, 527-537.
50.
Rübel, E. A.1914: The forests of the western Caucasus. Journal of Ecology2, 39-42.
51.
Ryan, W. B. F., Pitman, W. C., III, Major, C. O., Shimkus, K., Moskalenko, V., Jones, G. A., Dimitrov, P., Gorür, N., Sakinç, M. and Yüce, H.1997: An abrupt drowning of the Black Sea shelf. Marine Geology138, 119-126.
52.
Serebryannyi, L. R., Margalitadze, N. A., Janelidze, C. P., Gei, N. A., Ilves, E. O., Skobeeva, E. I., Vinievskaya, E. M. and Orlov, A. V.1984: Pozdne-i poslelednikovaia istoriia fitolandshaftov Kolkhidy (Late- and post-glacial history of the phyto-landscapes of Colchis). Izvestiia Akademii Gruzinskoi SSR, Seria Biologiia10, 5-5 (in Russian).
53.
Sharadze, N. N., editor 1987: Derevia i kustarniki Batumskogo botanicheskogo sada: annotirovannii spisok (Trees and shrubs of the Batumi Botanical Garden: an annotated list). Metsniereba (in Russian).
54.
Shatilova, I. I. and Mchedlishvili, N. S.1980: Palinologicheskie kompleksy Chaudinskikh otlozhenii zapadnoi Gruzii i ikh stratigraficheskoe znachenie (Palynological complexes of Western Georgian Chaudian deposits and their stratigraphic significance). Metsniereba (in Russian).
55.
Sluka, V. P.1973: Palinologicheskie i litologo-fatsial’nye issledovaniia golotsenovykh torfianykh otlozhenii Kolkhidskoi nizmennosti (Palynological and litho-facies analysis of Holocene peat sediments of the Colchis lowland). In Palinologiia golotsena i marinopalinologia. Nauka, 53-58 (in Russian).
56.
Strabo 2000: Geography (Books 10-12, translated by H.L. Jones). Harvard University Press.
57.
Stuiver, M. and Reimer, P. J.1993: Extended 14C database and revised CALIB radiocarbon calibration program. Radiocarbon35, 215-230.
58.
Tarasov, P. E., Volkova, V. S., Webb, T., III, Guiot, J., Andreev, A. A., Bezusko, L. G., Bezusko, T. V., Bykova, G. V., Dorofeyuk, N. I., Kvavadze, E. V., Opisova, I. M., Panova, N. K. and Sevastyanov, D. V.2000: Last glacial maximum biomes reconstructed from pollen and plant macrofossil data from northern Eurasia. Journal of Biogeography27, 609-620.
59.
Tsetskhladze, G. R.1994: Archaeological investigations in Georgia in the last ten years and some problems of the ancient history of the eastern Black Sea region. Revue des é tudes Anciennes96, 385-414.
60.
Tsetskhladze, G. R. 1997: How Greek colonists adapted their way of life to the conditions in Kolkhis. In Fossey, J. M., editor, Proceedings of the first international conference on the archaeology and history of the Black Sea. J.C. Gieben, 121-136.
61.
Tsetskhladze, G. R. and Treister, M. Y.1995: The metallurgy and production of precious metals in Colchis before and after the arrival of the Ionians (towards the problem of the reasons for Greek colonisation). Bulletin of the Metals Museum24, 1-32.
62.
Tumajanov, I. I.1971: Changes of the Great Caucasus forest vegetation during the Pleistocene and Holocene. In Davis, P. H., Harper, P. C. and Hedge, I. C., editors, Plant life of South-West Asia. Botanical Society of Edinburgh, 73-87.
63.
Tvalchrelidze, M., Lebanidze, Z. and Jaoshvili, G.2004: Eustatics of the Black Sea and sedimentation peculiarities during the last 20 000 years (Georgian sector of the Black Sea). Shromata krebuli Trudy GIN AN Gruzii, nov. ser.119, 656-666.
64.
Uchupi, E. and Ross, D. A.2000: Early Holocene marine flooding of the Black Sea. Quaternary Research54, 68-71.
65.
Umbanhowar, C. E. and McGrath, M. J.1998: Experimental production and analysis of microscopic charcoal from wood, leaves and grasses. The Holocene8, 341-346.
66.
van Geel, B.1978: A palaeoecological study of Holocene peat bog sections in Germany and the Netherlands, based on the analysis of pollen, spores and macro- and microscopic remains of fungi, algae, cormophytes and animals. Review of Palaeobotany and Palynology25, 1-120.
67.
Walter, H. 1974: Die vegetation Osteuropas, Nord-und Zentralasiens. Fischer.
68.
Yazvenko, S. B.1994: Holocene pollen record from a peatland in the West Caucasus, Abkhasia, Black Sea region. Journal of Paleolimnology12, 65-74.
69.
Zohary, D. and Hopf, M.1993: Domestication of plants in the Old World. Clarendon Press.
