scholarly journals Drivers of synchrony of acorn production in the valley oak (Quercus lobata) at two spatial scales

Ecology ◽  
2017 ◽  
Vol 98 (12) ◽  
pp. 3056-3062 ◽  
Author(s):  
Walter D. Koenig ◽  
Johannes M. H. Knops ◽  
Mario B. Pesendorfer ◽  
David N. Zaya ◽  
Mary V. Ashley
Keyword(s):  
Spatial Scales ◽  
Acorn Production ◽  
Quercus Lobata ◽  
Valley Oak

Intraspecific variation in the relationship between weather and masting behavior in valley oak, Quercus lobata

2020 ◽  
Vol 50 (12) ◽  
pp. 1299-1306
Author(s):  
Walter D. Koenig ◽  
Johannes M.H. Knops ◽  
William J. Carmen
Keyword(s):  
Seed Production ◽  
Pollen Limitation ◽  
Weather Conditions ◽  
Quercus Petraea ◽  
Weather Factors ◽  
Acorn Production ◽  
Winter Rainfall ◽  
Quercus Lobata ◽  
Valley Oak ◽  
The Relationship

Masting behavior — variable and synchronized reproduction by a population of plants — has long been recognized as correlating with weather. How and why weather conditions influence seed production is, however, poorly understood. We investigated the relationships between acorn production and both local weather and long-term climate in 10 populations across the geographic range of the valley oak (Quercus lobata Née), a California endemic that matures acorns in a single season. Acorn production was larger following a cold spring in the prior year and dry conditions in the winter and spring immediately preceding acorn maturation; similar patterns were also found, with minor differences, at all 10 individual sites. The strength of the relationships varied geographically in the case of the correlation between winter rainfall and annual acorn production, which was stronger (more negative) at wetter sites. Thus, in contrast to a recent study in Quercus petraea (Matt.) Liebl., weather had generally similar effects on acorn production throughout the range of Q. lobata. Similar to Q. petraea, however, the strength of the relationship between site-level annual acorn production and one of the weather factors affecting acorn production (winter rainfall in the case of Q. lobata) varied geographically in ways that may be related to differences among sites in the degree of pollen limitation. Understanding the mechanisms by which weather affects seed production is challenging but critical if we are to understand how climate change will affect masting behavior in the future.

scholarly journals Fitness consequences of seed size in the valley oak Quercus lobata Née (Fagaceae)

2011 ◽  
Vol 68 (3) ◽  
pp. 477-484 ◽  
Author(s):  
Richard D. Sage ◽  
Walter D. Koenig ◽  
Blair C. McLaughlin
Keyword(s):  
Seed Size ◽  
Quercus Lobata ◽  
Valley Oak ◽  
Fitness Consequences

scholarly journals Interspecific and Intraspecific Pollination Patterns of Valley Oak,Quercus lobata, in a Mixed Stand in Coastal Central California

2011 ◽  
Vol 172 (5) ◽  
pp. 691-699 ◽  
Author(s):  
Saji T. Abraham ◽  
David N. Zaya ◽  
Walter D. Koenig ◽  
Mary V. Ashley
Keyword(s):  
Mixed Stand ◽  
Central California ◽  
Quercus Lobata ◽  
Valley Oak

Gene movement and genetic association with regional climate gradients in California valley oak (Quercus lobata Née) in the face of climate change

2010 ◽  
Vol 19 (17) ◽  
pp. 3806-3823 ◽  
Author(s):  
VICTORIA L. SORK ◽  
FRANK W. DAVIS ◽  
ROBERT WESTFALL ◽  
ALAN FLINT ◽  
MAKIHIKO IKEGAMI ◽  
...  
Keyword(s):  
Climate Change ◽  
Genetic Association ◽  
Regional Climate ◽  
Quercus Lobata ◽  
Climate Gradients ◽  
Valley Oak ◽  
The Face

scholarly journals Landscape genetics and population structure in Valley Oak (Quercus lobata Née)

2015 ◽  
Vol 102 (12) ◽  
pp. 2124-2131 ◽  
Author(s):  
Mary V. Ashley ◽  
Saji T. Abraham ◽  
Janet R. Backs ◽  
Walter D. Koenig
Keyword(s):  
Population Structure ◽  
Landscape Genetics ◽  
Quercus Lobata ◽  
Valley Oak

Seedling response to water stress in valley oak ( Quercus lobata ) is shaped by different gene networks across populations

2019 ◽  
Vol 28 (24) ◽  
pp. 5248-5264 ◽  
Author(s):  
Alayna Mead ◽  
Juan Peñaloza Ramirez ◽  
Megan K. Bartlett ◽  
Jessica W. Wright ◽  
Lawren Sack ◽  
...  
Keyword(s):  
Water Stress ◽  
Gene Networks ◽  
Quercus Lobata ◽  
Valley Oak ◽  
Response To Water

scholarly journals Growth Response of Newly Planted Valley Oak Trees to Supplemental Fertilizers

1992 ◽  
Vol 10 (4) ◽  
pp. 242-244
Author(s):  
Ed Perry ◽  
Gary W. Hickman
Keyword(s):  
Growth Response ◽  
Slow Release ◽  
Single Application ◽  
Quercus Lobata ◽  
Adequate Nutrition ◽  
Valley Oak ◽  
Oak Trees ◽  
Native Soil ◽  
Soluble Fertilizer ◽  
One Year

Abstract Growth of Valley Oak (Quercus lobata Neé) trees was not improved by slow-release or soluble fertilizers applied at planting time, nor by a single application of soluble fertilizer one year after planting. The native soil, with nutrient levels typical of newly developed residential and park areas in the region, provided adequate nutrition for good tree growth over the term of the 3-year study.

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