نتایج جستجو برای: sniezko

تعداد نتایج: 5  

2007
Whitebark Pine Sandra J. Kegley Ellen Michaels Goheen Richard A. Sniezko

Goheen, Ellen M.; and Sniezko, Richard A., tech. coords. 2007. Proceedings of the conference whitebark pine: a Pacific Coast perspective. 2006 August 27-31: Ashland, OR. R6-NR-FHP-2007-01. Portland, OR: Pacific Northwest Region, Forest Service, U. S. Department of Agriculture; p. 175. The Conference Whitebark Pine: A Pacific Coast Perspective provided a forum for current research on whitebark p...

1999
J. Bradley Richard A. Sniezko

Tree improvement programs have generally relied on testing families in open light environments. With increased interest in multiaged silvicultural systems, some people have questioned whether families selected in the open are appropriate for planting in the shade. We grew Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) families from two climatically distinct seed sources for 2...

2007
Nick S Dudley Robert L James Richard A Sniezko Aileen Yeh

Fusarium isolates obtained from diseased Acacia koa Gray (Fabaceae) plants, adjacent soil, and seeds and seedpods may or may not be pathogenic on young seedlings under greenhouse conditions. This includes isolates of Fusarium oxysporum, the putative cause of koa wilt and dieback disease (“koa wilt”) in Hawai‘i. We tested 10 Fusarium isolates, made up of 4 different species (F. solani, F. subglu...

Journal: :محیط زیست طبیعی 0
محسن احمدی کارشناس ارشد، گروه محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تهران محمد کابلی دانشیار، گروه محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تهران افشین علیزاده شعبانی استادیار گروه محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تهران سهراب اشرفی استادیار گروه محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تهران

-   ahmadi, m., kaboli, m., imani harsini, j., khosravi sharifabadi, r., almasi, m., 2012. strategic management plan for wolf (canis lupus) in hamedan province: an approach to reducing human-wolf conflicts. journal of natural environment, iranian journal of natural resources. 65, 271–281. -   ballard, w.b., dau, j.r., 1983. characteristics of gray wolf, canis lupus, den and rendezvous sites in ...

Journal: :One earth 2021

•Canopy mortality has consistently increased across Europe in the past three decades•Increasing canopy will have profound changes on forest demography•Current rates of hold aging trend Europe's forests•Future increases might lead to widespread decline age Land use and climate change are challenging forests around globe. An important indicator increasing pressure ecosystems is tree mortality, th...

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