Prairie Works is the source for ecological and landscape services in Northwest Illinois. Prairie Works can assist on projects large and small ranging from prairie and woodland restoration, invasive species control, controlled burning, bio-engineered erosion control and landscaping through the use of native plants. Prairie Works offers an environmentally friendly and dynamic solution to traditional land use practices and strives to connect people to the natural history of the area.

Cory's Blog: A cyber bulletin containing information, inside dope, statements, news, reports, observations and ramblings. Please browse the archives at you leisure.

Monthly Archive for January, 2008

Historic Aerial Photography

Example: Guilford & Ford Roads, JoDaiviess Co Before the execution of any ecological restoration project the first step is to learn about the history of the land. It’s similar to how someone restoring a historic building will first seek out old photographs. The early surveyors’ notes from the 1800s offer a great overview, but they are most useful for large tracts of land and often lack the detail needed for smaller projects. The first aerial photographs of an area are the next most valuable tool. The Illinois Historical Aerial Photography Project (ILHAP) began around a decade ago and Northwest Illinois is its newest addition.

Photographs of all counties in Illinois were taken between 1937 and 1947, under the Agricultural Adjustment Act of 1933. These photos were used mainly for tax purposes and for post-depression land analysis. Today, the photos are used by the goverment, historians, ecologists, and many others for several purposes including: determining past land uses, restoration of natural areas, assessing historical changes in stream dynamics, declaring brownfields and many other applications. Aerial photography is widely used today and is a very important tool for land managers.

Due to the chemical makeup of the old film negatives they are now detiorating at an alarming rate and it is necessary to transfer the images into a digital format, or digitize, to save the first aerial photos. This motivated the project to be done sooner rather than later. In total around 250,000 individual negatives are archived in Springfield. At the time of writing, 58 of Illinois’ 102 counties have been digitized. The Chicago metro area was first to be done in 2003 as the declaration of wetlands is an important issue in that area.

Although the images are rather rough by today’s standards, the overall experience of viewing these photos is fascinating. Viewing them is not something to do if you’re in a hurry - it is easy to consume many hours doing so. Looking back in time and realizing the transformation that has occurred since the 1940s can be mind boggling and the comparison to recent aerial images is astounding.

Our landscape has changed a lot since small farms, country schoolhouses and railroads dotted the landscape. The comment heard most often from people is how “open” the landscape was. This solidifies what ecologists have known - the woodlands in the Driftless Area were not as dense as they are today. The Midwest has changed from open Oak-Hickory savannas and woodlands to the dense Maple-Softwood forests that we find today. Fire shadows, a remnant from pre-settlement times, were much more evident in 1940 then they are today. Also, we see natural meandering courses of small streams and not the channelized irrigation canals that have become so familiar. Looking at our cities and villages is also very interesting.

Consider the following by Dr. Dov Gavish of the Hebrew University of Jerusalem, from the book Historical Aerial Photography Collection of Israel: “Through the aerial photograph, the landscape revealed to the camera lens is translated into visual language. The aerial photograph captures scenes and events that have vanished with time, and the testimony it embodies is unassailable. The scene that appears in a single aerial photo is a link in the chain of the landscape’s ever-changing and ever evolving history; there is a story that preceded it, and another one that followed it.”

The photographs can be viewed here: http://www.isgs.uiuc.edu/nsdihome/webdocs/ilhap/ and you must download the Mr. Sid software http://www.lizardtech.com/download/  in order to view the .sid files. The Mr. Sid compression software is 4.39kb.

When viewing the images you will notice a series of numbers on the images. Those numbers are the exposure numbers and were in the corner of each frame. When the images were fused together they look out of place and are sometimes in the way of the desired imagery. You also will notice the wing of the plane or what could be part of the camera equipment at some points - all part of the character of these historic images.

Iowa and Wisconsin have there own forms of historic aerials as well:

http://ortho.gis.iastate.edu/PhotosMetadata.htm Iowa

http://www.geography.wisc.edu/maplib/aerial.html  Wisconsin

Cold

The temperature dropped to -18 degrees on Sunday morning (1/20) in Galena.

Aldo Leopold

Aldo Leopold “As a society, we are just now beginning to realize the depth of Leopold’s work and thinking.”- Mike Dombeck, Chief Emeritus U.S. Forest Service

Today, January 11, marks the birth of Aldo Leopold (1887). Aldo Leopold was a highly influential environmentalist and is often credited for begining the environmental movement as early as the 1940s. He is a respected scholar, scientist, philiosopher and writer. Leopold influenced the begining of conservation education in schools, developed the first game management plans and his perspective on environemntal thought known as ’Land Ethic’ carved the way for land conservation, restoration ecology, sustainable farming, and proper land management practices in general. During his 61 years he published nearly 500 works including technical reports, speeches, textbooks, newsletters, reviews, and poems. But he is best-known for A Sand County Almanac, essays published 18 months after his death.

Aldo Leopold was born in Burlington, IA and his parents planted a Red Oak to commemorate his birth. His love affair with the outdoors was evident as a child and led him to Yale University School of Forestry, where he graduated with a masters in forestry in 1909.  Following Yale he worked for the U.S. Forest Service for 19 years. He left the Forest Service in 1928 and began doing independent contract work for land owners throughout the Midwest. In 1933 he was appointed Professor of Game Management in the Agricultural Economics Department at the University of Wisconsin-Madison (a first for the nation) and also published the first textbook in Wildlife Game Management. He was involved in the world’s first prairie restoration, now known as Curtis Prairie, at the UW-Madison Arboretum and bought a farm on the Wisconsin River near Baraboo, WI in 1935. At what he referred to as ”The Shack,” Leopold carried out several ecological experiments and it served as the setting for his many essays to come.

In 1941, Aldo began planning for a series of essays to be published to be enjoyed by all americans. Writtten from his “Shack” on his Baraboo farm, this series of essays was accepted for publishing by Oxford Press on April, 14 1948. One week later, on April 21st, Aldo Leopold died while fighting a wildfire on his Baraboo farm. Oxford Press released Leopold’s “Great Possessions” under the name “A Sand County Almanac” in 1949. 

Land Ethic - With over 2 million copies sold and translated into 9 languages A Sand County Almanac it is the most respected book about the environment ever published. Every proffesional conservationist points to this book as a catalyst for thier career, no matter in what capacity they work. The term ‘Land Ethic’ was coined in the final chapter of this groundbreaking book.  Leopold’s idea is that land is not a commodity to be possessed; rather, humans must have mutual respect for Earth in order to not destroy it. He also puts forth the idea that humans will never be free if they have no wild spaces in which to roam. Leopold also states the basic principle of his land ethic as, “A thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community. It is wrong when it tends otherwise.” and “The land ethic simply enlarges the boundaries of the community to include soils, waters, plants, and animals, or collectively: the land. The land ethic changes the role of Homo sapiens from conqueror of the land-community to plain member and citizen of it. It implies respect for his fellow-members, and also respect for the community as such.”

Like many pioneers and visionaries, their influence is not entirely appreciated or known until many decades later. It was not until the 1970s that his great book became well known with the begining of environmentalism. Today, the Leopold legacy is still gaining strength. In 2004 the state of Wisconsin declared the first weekend in March as Aldo Leopold days. The Baraboo, WI, “Shack” is a tourist site drawing thousands of visitors a year and recent biographies have elevated his status even further. From a scientific point of view, his approach of looking at all parts of the land as one whole system, and not catagorized into seperate parts, has recently been accepted by academia and is the train of thought now being instilled into conservation scholars today.

Historically, the overall appreciation for Leopold has mirrored society’s overall appreciation for nature. So we can only wish for his popularity to continue…

http://www.aldoleopold.org/  The Aldo Leopold Foundation

http://www.amazon.com/ Buy A Sand County Almanac

http://gargravarr.cc.utexas.edu/chrisj/leopold-quotes.html Excerpts from A Sand County Almanac

http://www.leopold.iastate.edu/about/aldo.htm Leopold Center for Sustainable Agriculture

December Snow

Galena received around 20 inches of snow and ice in December. One of the snowiest and coldest Decembers in recent memory.

Galena in the New York Times

“The Nations Official Recorder of Modern Events”Recently, the New York Times featured Galena, IL in its travel section. It was a rather lengthy article and was written from an interesting perspective, a national one. Several people that I know were quoted and I learned about the local real estate climate, among other things.

What does this have to do with nature? Absolutely nothing. But it is great to have the country’s largest and most respected news source feature our town. Read the article here.

http://travel.nytimes.com/2007/12/07/travel/escapes/07havens.html