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37 results for “Quercus velutina”
Data and R code for “Individual-level variation in reproductive effort in chestnut oak (Quercus montana Willd.) and black oak (Q. velutina Lam.)”, Forest Ecology and Management, 2022
Masting is a population-level reproductive strategy, where individuals synchronize large but intermittent seed production. Despite the high degree of synchrony at the population level, there can be considerable variation in reproduction among individuals (intraspecific variation). Here, we use 18 years of acorn production data from individual chestnut oak and black oak from control and thinned stands, to understand what factors influence individual differences in reproductive effort and variability. We included a variety of tree-level measurements, environmental characteristics, and measurements from tree cores to determine if certain characteristics were associated variations in reproduction. We considered both mean annual acorn production per m2 crown and interannual variation in acorn production (CV) as response variables. We also classified individuals as super producers (i.e., those that consistently produce more acorns than others), good, fair and poor producers (i.e., those that consistently produce less or have a higher number of failure years). In chestnut oak, 14% of the individuals were classified as super producers and contributed 34% of the total acorns, while poor producers made up 35% of the trees and contributed only 16% to total acorn production. In black oak, super producers (14% of the individuals) contributed 31% of total acorns and poor producers (24% of the individuals) contributed only 9% of the acorns. Diameter at breast height (DBH) was the most consistent variable for explaining intraspecific variation in reproductive effort and variability (i.e., larger individuals had higher mean acorn production for both chestnut oak and black oak, and lower CV for black oak). Other variables that influenced reproduction and variation included elevation and clay content for chestnut oak, and slope for black oak. We found no significant effect from the thinning treatment on acorn production. Our results illustrate how tree-level and environmental characte
Quercus velutina (Fagaceae) - inflorescence - whole - unspecified
Image of Quercus velutina (Fagaceae) - inflorescence - whole - unspecified
Quercus velutina (Fagaceae) - inflorescence - whole - male
Image of Quercus velutina (Fagaceae) - inflorescence - whole - male
Quercus velutina (Fagaceae) - inflorescence - whole - female
Image of Quercus velutina (Fagaceae) - inflorescence - whole - female
Quercus velutina (Fagaceae) - leaf - margin of upper + lower surface
Image of Quercus velutina (Fagaceae) - leaf - margin of upper + lower surface
Quercus velutina (Fagaceae) - fruit - lateral or general close-up
Image of Quercus velutina (Fagaceae) - fruit - lateral or general close-up
Quercus velutina (Fagaceae) - leaf - unspecified
Image of Quercus velutina (Fagaceae) - leaf - unspecified
Quercus velutina (Fagaceae) - leaf - whole upper surface
Image of Quercus velutina (Fagaceae) - leaf - whole upper surface
Quercus velutina (Fagaceae) - twig - orientation of petioles
Image of Quercus velutina (Fagaceae) - twig - orientation of petioles
Quercus velutina (Fagaceae) - twig - orientation of petioles
Image of Quercus velutina (Fagaceae) - twig - orientation of petioles
Quercus velutina (Fagaceae) - leaf - margin of upper + lower surface
Image of Quercus velutina (Fagaceae) - leaf - margin of upper + lower surface
Quercus velutina (Fagaceae) - leaf - whole upper surface
Image of Quercus velutina (Fagaceae) - leaf - whole upper surface
Quercus velutina (Fagaceae) - leaf - whole upper surface
Image of Quercus velutina (Fagaceae) - leaf - whole upper surface
Quercus velutina (Fagaceae) - leaf - showing orientation on twig
Image of Quercus velutina (Fagaceae) - leaf - showing orientation on twig
Quercus velutina (Fagaceae) - leaf - unspecified
Image of Quercus velutina (Fagaceae) - leaf - unspecified
Quercus velutina (Fagaceae) - twig - close-up winter leaf scar/bud
Image of Quercus velutina (Fagaceae) - twig - close-up winter leaf scar/bud
Quercus velutina (Fagaceae) - twig - orientation of petioles
Image of Quercus velutina (Fagaceae) - twig - orientation of petioles
Quercus velutina (Fagaceae) - leaf - margin of upper + lower surface
Image of Quercus velutina (Fagaceae) - leaf - margin of upper + lower surface
Quercus velutina (Fagaceae) - leaf - unspecified
Image of Quercus velutina (Fagaceae) - leaf - unspecified
Quercus velutina (Fagaceae) - twig - orientation of petioles
Image of Quercus velutina (Fagaceae) - twig - orientation of petioles
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