Minden Bog, Michigan 3500 Year Testate Amoebae Water Table Depth Booth, R.K.; Jackson, S.T. Booth, R.K. Jackson, S.T. Other Hydroclimate Reconstruction hydrology earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Arcella artocrea) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Arcella vulgaris) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Hyalosphenia papilio) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Amphitrema flavum) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Amphitrema wrightianum) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Assulina seminulum) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Hyalosphenia elegans) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Cyclopyxis arcelloides) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Difflugia pulex) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Habotrocha angusticollis) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Heleopera sphagni) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Heleopera sylvatica) earth science/paleoclimate/climate reconstructions|paleolimnology (depth at sample end,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,depth at top of sample) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Hyalosphenia subflava) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Trigonopyxis minuta) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Centropyxis ecornis) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Difflugia globulosa) earth science/paleoclimate/paleolimnology (total testate amoebae,null,null,count,null,paleolimnology,raw,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (water table depth,testate amoebae assemblage,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (transmittance,peat,null,percent,null,paleolimnology,null,spectrophotometry,N,null) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Arcella discoides) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Assulina muscorum) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Bulinularia indica) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Centropyxis aculeata) earth science/paleoclimate/paleolimnology (identified testate amoeba,null,null,percent,null,paleolimnology,raw,null,N,Trigonopyxis arcula) earth science/paleoclimate/reconstructions (Minden Bog>LATITUDE 43.6119>LONGITUDE -82.8361) We reconstructed the late-Holocene surface-moisture history and vegetation dynamics of a raised bog in Michigan using testate amoebae, peat humification, pollen, stomata and plant macrofossils. Our primary objective was to compare bog palaeohydrology with the water-level history of Lake Michigan, and to regional and local vegetation changes. Hydrologic histories inferred from testate amoebae and humification show similar trends, and correspond with records of past water-level variability in Lake Michigan. The bog clearly shows effective-moisture increases during the Algoma highstand (~3200-2300 cal. BP) and a later unnamed highstand (~1900-1300 cal. BP). Some higher-frequency fluctuations are also similar. The good correspondence indicates that bog hydrology and the water levels of Lake Michigan have been driven by changes in large-scale atmospheric circulation patterns for at least the past 3500 years. Climate during the Algoma highstand may have been spatiotemporally complex, with increasing moisture occurring several hundred years earlier in the northern portion of the western Great Lakes basin. Locally, the expansion and contraction of Picea populations on the bog surface was probably directly related to moisture conditions. The well-documented decline in Fagus populations in the central Great Lakes region after 1000 cal. BP is contemporaneous with a major shift towards drier conditions, suggesting that relative dryness caused the decline. STUDY NOTES: Testate amoebae data from Minden Bog, Michigan, and reconstruction of water table depth at the bog. Minden Bog is a raised bog located in lower Michigan, USA. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Booth, R.K. Investigator : Jackson, S.T. 2003-10-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16462 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/michigan/mindenbog_2003.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/michigan/mindenbog_2003.txt English https://www.ncdc.noaa.gov/paleo/study/16462 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/michigan/mindenbog_2003.txt Robert K. Booth and Stephen T. Jackson 2003A high-resolution record of late-Holocene moisture variability from a Michigan raised bog, USAThe Holocene136863-87610.1191/0959683603hl669rp http://hol.sagepub.com/content/13/6/863.abstract START YEAR: 3429 cal yr BP * END YEAR: -50 cal yr BP -82.8361 43.6119 -82.8361 43.6119