Author: Kevin S. Cummings
Publisher: Natural History Survey
Published: 1992
Total Pages: 194
ISBN-13: 9781882932009
DOWNLOAD EBOOK →Author: G. Bauer
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 400
ISBN-13: 3642568696
DOWNLOAD EBOOK →All those who think that bivalves are boring are in the best company. Karl von Frisch is reported to have turned the pages more quickly in texts where bivalves were treated because, according to him, they literally lack any behaviour. The fact that they can filtrate huge amounts of water, burrow into the sedi ment, actively swim, drill holes into rocks and boats or detect shadows with the aid of pretty blue eyes located on the rim of their mantle obviously left v. Frisch unimpressed. Why, then, a book on the large freshwater mussels (Naiads or Unionoida), which on first sight are much less spectacular than the marine ones? The main reason is that they are keepers of secrets which they reveal only on close and careful inspection. This is not only true for the pearls some species produce and which over centuries have contributed to the treasures of bishops and kings, but particularly for their ecology: their life cycles are linked with those of fishes, some can occur in incredible densities and some can live for more than 100 years. Thus, the presence or absence of naiads in a lake or stream has manifold implications.
Author: Daniel S. Wovcha
Publisher: U of Minnesota Press
Published:
Total Pages: 256
ISBN-13: 9781452903033
DOWNLOAD EBOOK →Minnesota's St. Croix River Valley and Anoka Sandplain offers a fascinating landscape history of this region in east-central Minnesota. The authors provide detailed accounts of the 39 varieties of native habitats that still exist in the Region, supplying descriptive text, photographs, line drawings, distribution maps, and lists of associated plants and animals for each habitat. They include directions to and interpretations of 35 sites accessible to the public where these native habitats can be explored firsthand.
Author: Lynne Diebel
Publisher: University of Wisconsin Pres
Published: 2015-03-24
Total Pages: 247
ISBN-13: 0299302946
DOWNLOAD EBOOK →Both a traveler's tale of a 359-mile canoe trip and an exploration of the dramatic environment of the Upper Midwest's Driftless region, following the streams of geologic and human history.
Author: Lynne Smith Diebel
Publisher: Big Earth Publishing
Published: 2007
Total Pages: 204
ISBN-13: 9781931599788
DOWNLOAD EBOOK →Detailed maps, photography, trip descriptions, water conditions, wildlife, history
Author: Paul David Scanlon
Publisher: Arcadia Publishing
Published: 2021
Total Pages: 208
ISBN-13: 1467149160
DOWNLOAD EBOOK →Best known for the world-renowned Mayo Clinic, Rochester's rich history holds so much more beyond medical excellence. But why was the world's greatest medical center built virtually in the middle of a cornfield in the first place? What happened to the Native Americans in the area? Were there ever bears in Bear Creek? Why are there so many geese at Silver Lake, and how did the Zumbro River get its name? What do the extinction of the dinosaurs and the passenger pigeon have to do with Rochester? Retired Mayo Clinic doctor and Rochester native Paul Scanlon answers these questions and more in this collection of historic tales from Med City.