1. Rocky Mountain Research Station, USDA Forest Service; 800 East Beckwith Avenue Missoula Montana 59801 USA
2. Division of Biological Sciences; University of Montana; Missoula Montana 59812 USA
3. Biyoloji Bölümü, Fen Edebiyat Fakültesi, Adnan Menderes Üniversitesi; 09100 Aydın Turkey
4. INCITAP (CONICET-UNLPam) and Facultad de Ciencias Exactas y Naturales; Universidad Nacional de La Pampa; Avenida Uruguay 151 6300 Santa Rosa Argentina