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Donald B. Zobel
Oregon State University
UnderstoryEcologyBotanyBiologyTephra
59Publications
18H-index
1,174Citations
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Publications 58
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#1Sushma Naithani (OSU: Oregon State University)H-Index: 14
#2Daniel J. Arp (OSU: Oregon State University)H-Index: 45
Last. Donald B. Zobel (OSU: Oregon State University)H-Index: 18
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Abstract We pay tribute to Donald J. Armstrong, who passed away at age 82 on June 13, 2019 in Corvallis, Oregon, USA. He was both an excellent teacher and a respected scientist. His research spanned more than 40 years and ranged from studying cytokinin structure and activity, to secondary metabolism, to inhibition of seed germination. He is fondly remembered by his colleagues, fellow scientists and students for his mentorship, friendship and, above all, as a gentle and kind human being. This tri...
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#1Dylan G. Fischer (The Evergreen State College)H-Index: 16
#2Joseph A. Antos (UVic: University of Victoria)H-Index: 30
Last. Donald B. Zobel (OSU: Oregon State University)H-Index: 18
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2 CitationsSource
#1Cynthia C. Chang (UW: University of Washington)H-Index: 8
#2Charles B. Halpern (UW: University of Washington)H-Index: 35
Last. Donald B. Zobel (OSU: Oregon State University)H-Index: 18
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2 CitationsSource
#1Donald B. Zobel (OSU: Oregon State University)H-Index: 18
Timber cruise data can provide useful information not available elsewhere. Measurements of timber volume (timber cruises) from the early 20th century for Coos County, Oregon, were used to assess the degree to which tree species distribution and timber volume varied with edaphic and climatic factors. The study area has diverse geology in a moderate maritime climate, and represents an area of forest transition between the Coast Range and the Klamath Mountains. Species distribution was determined f...
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#1Abby J. Watt (The Evergreen State College)H-Index: 1
#2Dylan G. Fischer (The Evergreen State College)H-Index: 16
Last. Donald B. Zobel (OSU: Oregon State University)H-Index: 18
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Ecological impacts of climate change in the Pacific Northwest may hinge on acclimation to drier summers, highlighting the importance of plant physiological studies in forests. Evaluating dominant forest plant species under old-growth and managed forest conditions is similarly important as timber harvest might change microclimates and alter drought effects on plants. We examined water potential and gas exchange rates of four dominant plant species in understories of subalpine forests of the Pacif...
2 CitationsSource
#1Donald B. Zobel (OSU: Oregon State University)H-Index: 18
#2Joseph A. Antos (UVic: University of Victoria)H-Index: 30
We studied the effects of tephra deposits on understory plants in old-growth conifer forests NE of Mount St. Helens, including initial damage and the subsequent 30 years of vegetation redevelopment. The amount of damage to plants increased and the degree of recovery declined as plant size decreased, as tephra depth increased, and where tephra fell on snow. Major herb species were affected strongly by tephra depth, whereas damage to shrubs resulted primarily where tephra fell on snow. Cover in 20...
2 CitationsSource
#1Donald B. Zobel (OSU: Oregon State University)H-Index: 18
#2Joseph A. Antos (UVic: University of Victoria)H-Index: 30
4 CitationsSource
#1Dylan G. Fischer (The Evergreen State College)H-Index: 16
#2Joseph A. Antos (UVic: University of Victoria)H-Index: 30
Last. Donald B. Zobel (OSU: Oregon State University)H-Index: 18
view all 4 authors...
Abstract Large volcanic eruptions can alter forest plant communities through a variety of mechanisms, including direct destruction of forests and changes to forest soils through tephra (aerially transported volcanic ejecta) deposits. While many studies have examined succession following direct destruction of forests, impacts to plant communities through tephra effects are less obvious, especially where the tephra depth is less than plant height. We used a 33-year experiment in an old growth fore...
4 CitationsSource
#1Donald B. Zobel (OSU: Oregon State University)H-Index: 18
1 CitationsSource
AbstractPremise of research. We sought to determine the role of flowering in recovery of understory herbs from a major disturbance and to determine the effects of plant and environmental factors on flowering patterns.Methodology. We counted flowering and nonflowering shoots in permanent plots eight to 10 times over a 30-year period for all 48 understory herb species in four subalpine old-growth conifer forests that received tephra (aerially transported volcanic ejecta) from the 1980 eruptions of...
5 CitationsSource
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