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Full-Text Articles in Life Sciences

Degree Of Call Synchrony During Interactions Between Male Snowy Tree Crickets, James W. Popp Oct 1990

Degree Of Call Synchrony During Interactions Between Male Snowy Tree Crickets, James W. Popp

Field Station Bulletins

Call synchrony has been reported for the snowy tree cricket (Oecanthus fultoni), but the degree to which it occurs in natural interactions has not been previously investigated. I recorded acoustic interactions among ten pairs of male snowy tree crickets to determine the degree to which call synchrony occurs. High levels of call synchrony (percent of calls that temporally overlapped another call) were found in all pairs, but in only half of the pairs was synchrony greater than expected by chance. Males differed considerably in their tendency to temporally overlap the calls of their neighbors. There was minimal frequency overlap of …


Alien Plant Species In Eastern Wisconsin Natural Areas, Lawrence A. Leitner Oct 1990

Alien Plant Species In Eastern Wisconsin Natural Areas, Lawrence A. Leitner

Field Station Bulletins

An expanded study of non-native plant species in eastern Wisconsin Natural Areas resulted in a total of 64 exotics being found. The most abundant were Rhamnus cathartica, Taraxacum officinale, and Berberis thunbergii. Sites suffering the greatest degrees of invasion were the oak openings, while the more mesic areas appeared relatively resistant.


Development Of Vegetation In Wetlands Restored On Ozaukee County Conservation Reserve Program Lands, James A. Reinartz, Elizabeth L. Warne Oct 1990

Development Of Vegetation In Wetlands Restored On Ozaukee County Conservation Reserve Program Lands, James A. Reinartz, Elizabeth L. Warne

Field Station Bulletins

We studied the natural revegetation of six wetlands created in 1988 and six wetlands created in 1989 in Ozaukee County, Wisconsin. By describing the flora and vegetation of these two sets of wetlands we could compare the development of plant communities in one- and two-year old wetlands. Of the 119 species found in the 12 wetlands, 64% were native, 62% were wetland plants, and 65% were perennials. More species were found in two-year old than in one-year old wetlands. There was also a strong correlation between wetland size and the number of species present during the first year after construction. …


Vascular Plants Of The Uwm Field Station Area, James A. Reinartz Apr 1990

Vascular Plants Of The Uwm Field Station Area, James A. Reinartz

Field Station Bulletins

Since 1967, Field Station staff and volunteers have been assembling a vascular plant species list and herbarium for the Field Station. For the purpose of this list the Field Station area is defined as a 15.5 km2 (6 mi2) area that includes all of the Cedarburg Bog, the Sapa Spruce Bog and the uplands surrounding the Field Station and uplands immediately peripheral to the Bog. The vascular plant species list includes 681 taxa (species, varieties, forms, and named hybrids) in 97 families. 455 of these taxa, collected from the area, are contained in the Field Station herbarium. The list is …


Maine's Endangered And Threatened Plants, Maine State Planning Office Jan 1990

Maine's Endangered And Threatened Plants, Maine State Planning Office

Maine Collection

Maine's Endangered and Threatened Plants

Executive Department, Maine State Planning Office, Critical Areas Program, 1990.


Preliminary Study To Determine The Effect Of Microwaves On Green Wood, Rudolph J. Eichenberger Jan 1990

Preliminary Study To Determine The Effect Of Microwaves On Green Wood, Rudolph J. Eichenberger

Journal of the Arkansas Academy of Science

A preliminary study was done to determine the moisture content of green wood by treating the wood with microwaves in an oven for various times between 1 and 4 minutes. The temperature of the wood was measured immediately following the radiation with a probe interfaced to a microcomputer and with a mercury-in-glass thermometer. Temperature probes were inserted into the wood samples. Actual moisture content of the wood was determined by weighing the samples before and after drying. Half of the samples exhibited a directly proportional relationship between moisture content and temperature after microwaving. The linear relationship was not generalizable to …