Alwynne B. Beaudoin - Lake File

Devils Lake (WI)

Location: Wisconsin, USA Latitude (N): 45.91° Longitude (W): 92.34°
Site notes:
Maher Jr, L. J. 1982
The Palynology of Devils Lake, Sauk County, Wisconsin. In Quaternary History of the Driftless Area, edited by J. C. Knox, L. Clayton and D. M. Mickelson, pp. 119-135. Wisconsin Geological and Natural History Field Trip Guide Book Number 5. University of Wisconsin-Extension, Geological and Natural History Survey, Madison, Wisconsin, USA.
Site discussed: Devils Lake (Wisconsin). (27/12/2007).

Maher Jr, L. J. 2006
Environmental Information from the Palynology of Bat Guano. Palaeogeography, Palaeoclimatology, Palaeoecology 237:19- 31.
AEU SCI QE 500 P15 Examined bat guano from Tumbling Creek Cave, southern Missouri. Inhabited by Grey Bat (Myotis grisescens), an insectivorous taxon, endangered. Bats forage up to 40 km from roost; surrounding vegetation is predominantly oak-hickory-pine woodland. Gives details of sampling and processing methods for bat guano. Centre of guano pile yielded date of about 2800 C14 yr BP. Some pollen likely trapped on bat fur; tested this by processing sample of bat fur for pollen. Experiment to see what pollen adheres to insects by trapping and processing night-flying moths for pollen; concludes they act as air-borne pollen traps. Same assumption made about insects on which bats feed. Processed sample of insect debris from a burnt-out light housing. Pollen assemblage compared well with upper sediment sample at Devils Lake. Thus bat guano contains representative sample of airborne pollen rain while they were feeding. If this is the case, then guano piles could contain a palaeoclimatic signal. Surface bat guano samples gives pollen assemblage similar to those from other sources (e.g., moss polsters, lake sediment surface samples). Bat guano deposition may not be continuous, this a guano pile may not be directly analogous to a lake core. Discusses possible techniques to explore stratigraphy of guano piles. Pollen data from Devils Lake, Wisconsin, is used only incidentally for comparative purposes in this study. (27/12/2007).

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