geol 553 lecture 21 biological evidence microfossils microfossils pollen pollen diatom diatom...
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GEOL 553 LECTURE 21Biological Evidence• Microfossils• Pollen• Diatom
• Macrofossils• Plants• Insects• Mollusca & Ostracoda & Foraminifera & Coccolithophores • Mammalia
• Lab: NSF Grant Writing
• Discussion: NSF Grant Proposal Guide
Biological Records of Climate Change• Nature of Record: • Macrofossils• Microfossils• Biomolecular (DNA)
• Taphonomy• In-situ• Selective transport• Differential degradation
• Interpretation of Assemblages• Modern Analogue• Ecosystems• Paleobiology: single vs. multi proxy
PollenDiatomPlantInsectMoluscaForaminiferaMicropaleontology deep seaVertebrate remains
Biological Records of Climate Change: Diatom
procedures employed to derive quantitative lake-water pH reconstructions from fossil diatom records
BIDI = Brackish Intertidal Diatom Index0 – 1
0 = lower elevation1 = higher elevation
Biological Records of Climate Change: Insect Remains
Subfossil Coleopteran sclerites recovered by flotation from peat deposits overlying a Bronze Age occupation site near Ballyarnet Lake, Co. Derry, Northern Ireland.
Late GlacialSouth Wales, UK
Warmest = FU-2Cooler = FU-3Coldest = FU-4(Younger Dryas)Thermophiles FU-5
Beetles v TreesCentral England
Augment Palynological Analyses
Present-day European distributions of four coleopteran species found in Lateglacial deposits.
Mutual Climate Range method MCR Test
Biological Records of Climate Change: Nonmarine Mollusca<<< Molusca exposed on an abandoned beach of Pluvial Lake Lahontan on the eastern side of Pyramid Lake, Nevada
Biological Records of Climate Change: Nonmarine Mollusca
Biological Records of Climate Change: Marine Mollusca
Examples of some common marine bivalves of the North Atlantic
Distribution of marine zoogeographical provinces in the Northeast Atlantic: a) present time; b) during the Eemian (Last) Interglacial.
https://en.wikipedia.org/wiki/North_Atlantic_oscillation
Biological Records of Climate Change: Foraminifera
Planktonic foraminiferal provinces in the modern ocean showing the close relationship between sea-surface temperature gradients and species abundances.
Biological Records of Climate Change: Megafauna
Biological Records of Climate Change: Micropaleontology Deep Sea