A close correlation exists at four peat sites between pollen indicators of human impact, especially Plantago lanceolata and Cerealia, and the elements silicon and especially titanium as indicators of erosion. Pollen of plants with a short life cycle occur at the peak of silicon or titanium or shortly after, and a tree-pollen response follows later. Short disturbances of the vegetation or very early human impact can be detected and delimited even better by the increase of these elements than by pollen analysis. The combined use of these two elements is not so much subject to interferences of diatoms or macrofossils as the use of ash content. The method provides important environmental information additional to pollen analysis. It can be used to detect not only human impact but also natural changes in the vegetation caused by a changing climate. The determination of these two additional parameters is easy and does not require sophisticated equipment.
Behre, K.E.1981: The interpretation of anthropogenic indicators in pollen diagrams . Pollen et Spores23, 225–245 .
3.
Behre, K.E. and Kučan, D.1986: Die Reflektion archäologisch bekannter Siedlungen in Pollendiagrammen verschiedener Entfernung – Beispiel aus der Siedlungskammer Flögeln, Nordwestdeutschland. In Behre, K.E. , editor,Anthropogenic indicators in pollen diagrams, Rotterdam: Balkema , 95–114.
4.
Bludau, W. and Görres, M.1993: Untersuchungen zur Siedlungstätigkeit des Menschen im süddeutschen Gebirge am Beispiel eines ombrogenen Moores – Pollenanalytische und geochemische Ergebnisse . Telma23, 213–236 .
5.
Bos, J.A.A. and Janssen, C.R.1996: Local impact of palaeolithic man on the environment during the end of the last glacial in the Netherlands . Journal of Archaeological Science23, 731–739 .
6.
Boyd, W.E.1982: Sub surface formation of charcoal and its possible relevance to the interpretation of charcoal remains in peat . Quaternary Newsletter37, 6–8 .
7.
Chapman, S.B.1964: The ecology of Coom Rigg Moss, Northumberland. II: The chemistry of peat profiles and the development of the bog system . Journal of Ecology52, 315–321 .
8.
Clymo, R.S. and Mackay, D.1987: Upwash and downwash of pollen and spores in the unsaturated surface layer of Sphagnum-dominated peat . New Phytologist105, 175–183 .
9.
Dörfler, W.1992: Radiography of peat profiles: a fast method for detecting human impact on vegetation and soils . Vegetation History and Archaeobotany1, 93–100 .
10.
Dumon, J.C. 1976: Action d'acides organiques divers sur des minéraux titanés (ilménite et rutile). Comparaison de leur pouvoir d'extraction du titane avec celui d'acides minéraux. Bulletin de la Société géologique de la France 18, 75–79.
11.
Edelman, H.J. 1985: Late Glacial and Holocene vegetation development of la Goutte Loiselot (Vosges, France). Doctoral thesis, University of Utrecht, 197 pp.
12.
Edwards, K.1979: Palynological and temporal interference in the context of prehistory, with special reference to the evidence from lake and peat deposits . Journal of Archaeological Science6, 255–270 .
13.
Faegri, K. and Iversen J.1992: Textbook of pollen analysis. Chichester: John Wiley .
Görres, M. 1991: Uüber den Eintrag anorganischer Nährstoffe in ombrogene Moore als Indikator der ehemaligen Aerosolbelastung. Dissertationes Botanicae 181. Berlin, Stuttgart: Cramer.
16.
Görres, M. and Bludau, W. 1992: Der Zusammenhang zwischen pollenund 14C-analytisch ermittelten Siedlungsphasen und erhöhten Mineral-stoffgehalten in Profilen des Weidfilzes/Starnberger See). Telma 22, 123–44.
17.
Hölzer, A. and Hölzer, A. 1987: Paläoökologische Moor-Untersuchungen an der Hornisgrinde im Nordschwarzwald. Carolinea 45, 43–50.
18.
Hölzer, A. and Hölzer, A. 1988a: Untersuchungen zur jüngeren Vegetations- und Siedlungsgeschichte im Blindensee-Moor (Mittlerer Schwarzwald). Carolinea 46, 23–30.
19.
Hölzer, A. and Hölzer, A. 1988b: Untersuchungen zur jüngeren Vegetations- und Siedlungsgeschichte in der Seemisse am Ruhestein (Nordschwarzwald). Telma 18, 157–74.
20.
Hölzer, A. and Hölzer, A. 1989: Untersuchungen zur jüngeren Vegetations- und Siedlungsgeschichte im Seewadel (Hegau). Telma 19, 57–75.
21.
Hölzer, A. and Hölzer, A. 1990: Paläoökologische und siedlungsgeschichtliche Untersuchungen im Seewadel bei Singen (Hegau). Berichte der Römisch-Germanischen Kommission 71, 309–33.
22.
Hölzer, A. and Hölzer, A.1994: Studies on the vegetation history of the Lautermoor in the Upper Rhine Valley (SW Germany) by means of pollen, macrofossils, and geochemistry. In Lotter, A.F. and Ammann, B. , editors,Festschrift Gerhard Lang, Dissertationes Botanicae 234, 309–336.
23.
Hölzer, A. and Hölzer, A. 1995: Zur Vegetationsgeschichte des Hornisgrinde-Gebietes im Nordschwarzwald: Pollen, Groβreste und Geochemie. Carolinea 53, 199–228.
24.
Hölzer, A. and Schloss, S. 1981: Paläoökologische Studien an der Hornisgrinde (Nordschwarzwald) auf der Grundlage von chemischer Analyse, Pollen- und Groβrestuntersuchung. Telma 11, 17–30.
25.
Iversen, J. 1941: Landnam i Danmarks stenalder. En pollenanalytisk Undersögelse över det förste Landbrugs Indvirkning paa Vegetationsudviklingen. Danmarks Geologiske Undersøgelse II. Række 66, 1–32.
26.
Iversen, J.1973: The development of Denmark's nature since the last glacial. Geology of Denmark III. Danmarks Geologiske Undersøgelse V(7c), Copenhagen.
27.
Jorgensen, E.G.1955: Solubility of silica in diatoms . Physiologia plantarum8, 846–851 .
28.
Kramm, E. 1978: Pollenanalytische Hochmooruntersuchungen zur Floren- und Siedlungsgeschichte zwischen Ems und Hase. Abhandlungen aus dem Landesmuseum für Naturkunde zu Münster in Westfalen 40, 1–44.
29.
Lotter, A.F. and Hölzer, A. 1989: Spätglaziale Umweltverhältnisse im Südschwarzwald: Erste Ergebnisse paläolimnologischer und paläoökologischer Untersuchungen an Seesedimenten des Hirschenmoores. Carolinea47, 7–14.
30.
Lotter, A.F. and Hölzer, A.1994: A high-resolution Late-Glacial and early holocene environmental history of Rotmeer, Southern Black Forest (Germany). In Lotter, A. F. and Ammann, B. , editors,Festschrift Gerhard Lang, Dissertationes Botanicae 234, 365–388.
31.
Maher, L.J.1972: Nomograms for computing 0.95 confidence limits of pollen data . Review of Palaeobotany and Palynology13, 85–93 .
32.
Mackereth, F.J.H.1965: Chemical investigation of lake sediments and their interpretation . Proceedings of the Royal SocietyB161, 295–309 .
33.
Maxwell, J.A.1968:Rock and mineral analysis. Chemical Analysis, vol. 27. New York: Interscience Publishers .
34.
Merkt, J. and Streif, H.1970: Stechrohr-Bohrgeräte für limnische und marine Lockersedimente . Geologisches Jahrbuch88, 137–148 .
35.
Oldfield, F.1960: Studies in the post-glacial history of British vegetation: Lowland Lansdale . New Phytologist59, 192–217 .
36.
Oldfield, F.1963: Pollen-analysis and man's role in the ecological history of the south-east Lake District . Geografiska Annaler45, 23–40 .
37.
Oldfield, F.1977: Lakes and their drainage basins as units of sediment-based ecological study . Progress in Physical Geography1, 460–504 .
38.
Reeves, R.D. and Brooks, R.R.1978:Trace element analysis of geological material. Chemical Analysis, vol. 51. New York: John Wiley .
39.
Ruzicka, J. and Hansen, E.H.1981:Flow injection analysis. Chemical analysis, vol. 62. New York: John Wiley .
40.
Sarmaja-Korjonen, K.1992: Fine-interval pollen and charcoal analyses as tracers of early clearance periods in S. Finland . Acta Botanica Fennica146, 1–75 .
41.
Schneider, S.1963: Chemical and stratigraphical investigations of high-moor profiles in north-west Germany. Internationaler Torfkongress Leningrad, 1963, Sekt. I, Nr. 9 VNIITP, 75–90.
42.
Stuiver, M. and Reimer, P.J.1993: Extended 14C age calibration program . Radiocarbon35, 215–230 .
43.
Sudom, M.D. and Arnaud, R.J.S.1971: Use of quartz, zirconium and titanium as indices in pedological studies . Canadian Journal of Soil Science51, 385–396 .
44.
Tolonen, K.1983: The post-glacial fire record. In Wein, R.W. and MacLean, D.A. , editors,The role of fire in northern circumpolar ecosystems. SCOPE, 21–44, New York: John Wiley .
45.
Tolonen, M.1978: Palaeoecology of annually laminated sediments in Lake Ahvenainen, S. Finland. I. Pollen and charcoal analyses and their relation to human impact . Annales Botanicae Fennici15, 177–208 .
46.
Tolonen, M.1983: Late Holocene vegetational history in Salo, Pukkila, SW Finland, with particular reference to human interference . Annales Botanicae Fennici20, 157–168 .
47.
Vuorela, I.1972: Human influence on the vegetation of Katinhäntä bog, Vihti, S. Finland . Acta Botanica Fennica98, 1–21 .
48.
Vuorela, I.1983: Field erosion by wind as indicated by fluctuations in the ash content of Sphagnum peat . Bulletin of the Geological Society of Finland55, 25–33 .
49.
Vuorela, I.1992: Indicator species and human activities in pollen analysis. In Grönlund, E. , editor,The first meeting of Finish palaeobotanists state of the art in Finland – May 2–4, 1990, 41–50.
50.
Wardenaar, E.C.P.1987: A new hand tool for cutting peat profiles . Canadian Journal of Botany65, 1772–1773 .
