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pro vyhledávání: '"Helmers, Doug"'
Autor:
Thogmartin, Wayne E, López-Hoffman, Laura, Rohweder, Jason, Diffendorfer, Jay, Drum, Ryan, Semmens, Darius, Black, Scott, Caldwell, Iris, Cotter, Donita, Drobney, Pauline, Jackson, Laura L, Gale, Michael, Helmers, Doug, Hilburger, Steve, Howard, Elizabeth, Oberhauser, Karen, Pleasants, John, Semmens, Brice, Taylor, Orley, Ward, Patrick, Weltzin, Jake F, Wiederholt, Ruscena
The eastern migratory population of monarch butterflies (Danaus plexippus plexippus) has declined by >80% within the last two decades. One possible cause of this decline is the loss of >= 1.3 billion stems of milkweed (Asclepias spp.), which monarchs
Externí odkaz:
http://hdl.handle.net/10150/624923
http://arizona.openrepository.com/arizona/handle/10150/624923
http://arizona.openrepository.com/arizona/handle/10150/624923
Autor:
Heitmeyer, Mickey, Fredrickson, Leigh, Laubhan, Murray, Nelson, Frank, Pogue, Gary, Helmers, Doug, King, Wayne
Publikováno v:
Wetland Techniques: Volume 3: Applications & Management; 2013, p69-120, 52p
