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The economic impacts of invasive species can be difficult to estimate especially when an invasive species does not affect economically important native species. This is partly because of the difficulty in determining the non-use value of native habitats damaged by invasive species and incomplete knowledge of the effects of all of the invasive species present in the U.S. Estimates for the ...
The Francis E. Walter Dam is an embankment dam located in Bear Creek Township, Luzerne County, Pennsylvania, U.S. Constructed in 1961 by the United States Army Corps of Engineers, it spans the Lehigh River at its confluence with the tributary Bear Creek, creating the Francis E. Walter Reservoir. Although the dam was originally constructed for ...
Ecosystem engineers are ‘organisms that demonstrably modify the structure of their habitats’. [60] Examples of ecosystem engineers in rewilding include beaver, elephants, bison, elk, cattle (as analogues for the extinct aurochs) and pigs (as analogues for wild boar). [61] [62] [63] [64]
The area of the United States that he placed under public protection totals approximately 230,000,000 acres (930,000 km 2). Gifford Pinchot had been appointed by McKinley as chief of Division of Forestry in the Department of Agriculture.
A group of 104 rocket scientists at Fort Bliss, Texas. Operation Paperclip was a secret United States intelligence program in which more than 1,600 German scientists, engineers, and technicians were taken from the former Nazi Germany to the U.S. for government employment after the end of World War II in Europe, between 1945 and 1959.
Since the early 2000s, a division of the U.S. Army Corps of Engineers has worked with FWS and the states to resolve endangered species and ecosystem management issues. ESA-listed species in the area include the least tern (Sterna antillarum), pallid sturgeon (Scaphirhynchus albus), and the fat pocketbook (potamilus capax). [256]
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The lands authorized to be acquired consisted of 15,000 acres (6,100 ha) for the dam and reservoir area, 13,000 acres (5,300 ha) for the public access and recreation area, and 2,000 acres (810 ha) for the wildlife mitigation area for a total acreage of 30,000 acres (12,000 ha) at $20,000,000.00 (U.S. Army Corps of Engineers, 1974).