An analysis of drumlin form in the northeastern and north-central United States: Discussion and reply

Algal chlorophyll a is commonly used as a surrogate for algal biomass. Data from three lakes in western Nebraska, five wetlands in north-central North Dakota, and two lakes in north-central Minnesota represented a range in algal biovolume of over four orders of magnitude and a range in chlorophyll a from less than 1 to 380 mg∙m−3. Analysis of these data revealed that there was a linear relation, log10 algal biovolume = 5.99 + 0.09 chlorophyll a (r2 = 0.72), for cases in which median values of chlorophyll a for open-water periods were less than 20 mg∙m−3. There was no linear relation in cases in which median chlorophyll a concentrations were larger than 20 mg∙m−3 for open-water periods, an occurrence found only in shallow prairies lakes and wetlands for years in which light penetration was the least.

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Processing Snap Bean Variety Responses to Applied Nitrogen and Irrigation in the North Central United States

Agronomy Journal ◽

10.2134/agronj14.0406 ◽

2015 ◽

Vol 107 (4) ◽

pp. 1401-1410 ◽

Cited By ~ 1

Author(s):

Yi Wang ◽

Matthew D. Ruark ◽

Amanda J. Gevens ◽

Don T. Caine ◽

Amanda L. Raster ◽

...

Keyword(s):

United States ◽

Snap Bean ◽

North Central ◽

The North ◽

Bean Variety ◽

Central United States ◽

Applied Nitrogen

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The Pseudoscorpions of Illinois

Illinois Natural History Survey Bulletin ◽

10.21900/j.inhs.v24.198 ◽

1949 ◽

Vol 24 (1-4) ◽

pp. 413-500 ◽

Cited By ~ 5

Author(s):

C. Clayton Hoff

Keyword(s):

United States ◽

Natural Habitat ◽

Habitat Preferences ◽

The United States ◽

Accurate Information ◽

North Central ◽

Taxonomic Importance ◽

Central United States ◽

Identification Of Species ◽

Made In

Pseudoscorpions are minute animals only a few millimeters long, with the general appearance of diminutive scorpions except that they have no tails. They belong to the large phylum of joint-legged animals, the Arthropoda, and to the class Arachnida. which, in addition to the pseudoscorpions, embraces the spiders, mites, ticks, scorpions, and other related groups. Pseudoscorpions are seclusive in habit, occurring in soil cover and rotten logs, under bark, and in similar places out of doors: one species is found in houses. In their natural habitat, these little brown animals arc difficult to see. especially when they draw in their legs and "play possum." In this position they look like little specks of dirt. Probably because pseudoscorpions are inconspicuous, few collections of the group have been made in the past, and the fauna, at least of North America, and especially of the central and north-central United States, has remained scantily known. The object of this report is twofold, first to present illustrated keys and descriptions for the identification of species in this region, and, secondly, to summarize information regarding the distribution, biology, and habitat preferences of the species. As an aid in use of the keys, a section has been included on morphology, in which the structures now considered of major taxonomic importance are explained. Summarizing the distribution has been especially difficult because many identifications made prior to Chamberlin's work are probably incorrect and should be rechecked before they are cited. Because of this situation there is little accurate information to serve as a guide in foretelling what additional described species may be collected in Illinois. In order to make this report of wide application, the keys have been made to include all the genera known from the central and northeastern portions of the United States and adjacent portions of Canada.

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