Richard A. Evans

3 Questions 12 Answers 0 Followers

Questions related from Richard A. Evans

Any one have information about "Rusty" Crayfish (Faxonius or Orconectes rusticus) within its Native Range (mid- to upper Ohio River Drainage)?

What limits the distribution and abundance of rusty crayfish within its native range? How do rusty crayfish affect other crayfish, fish, and plant populations and ecosystems within its native...

01 March 2018 1,938 2 View

To what extent do levels of Cladophora, Oscillatoria, & Lyngbia indicate nutrient pollution in a stream ?

I've recently (May, 2017) found moderate levels of Cladophora, Oscillatoria, and Lyngbia in a 2nd order, softwater, coldwater stream in northwestern New Jersey (USA). A concern has been expressed...

06 June 2017 3,267 2 View

What is the longest undammed river open to an ocean in the contiguous 48 United States? Anything longer than the Delaware River (330 miles)?

I know there are longer un-dammed rivers open to the ocean in Alaska and British Columbia. I also know there are longer un-dammed rivers in the contiguous 48 United States, but they are not open...

13 January 2017 7,936 18 View