1Cave and Endangered Invertebrate Research Laboratory, SWCA Environmental Consultants, 4407 Monterey Oaks Boulevard, Building 1, Suite 110, Austin, Texas 78749, U.S.A. Email: [email protected] 22016 Boulevard Gouin est Montréal, Québec, Canada, H2B 1W9. Email: [email protected] 3This is publication no. 20 of the Karst Biosciences and Environmental Geophysics Research Laboratories, SWCA En...

Abstract Oaks ( Quercus sp.) are among the most ecologically and economically important woody Angiosperms of northern hemisphere. Nowadays, reduction biodiversity is becoming a matter global concern, several oak species have been included in IUCN Red List Threatened Species. Consequently, characterization preservation strategies for germplasm largely promoted. Thus, this work, genetic diversity...

We studied the relationships among 5-year radial (diameter and basal area) growth of red oak (genus Quercus, subgenus Erythrobalanus) crop trees and predictor variables representing individual tree vigor, distance-dependant competition measures, and distance-independent competition measures. The red oaks we examined are representative of the commercially and ecologically important oak species o...

We investigated the effects of periodical cicadas (Magicicada spp.) on growth of their hosts using records of radial tree-ring growth on oaks (Quercus spp., a common host genus) and pines (Pinus spp., a common nonhost genus) growing within the ranges of 13and 17-year broods. Growth of oaks was significantly depressed during years of adult emergence by about 4%. Effects in years following emerge...

Acorn production by oaks (Quercus spp.) is an important food resource for wildlife in many deciduous forests. Its role as a hard mast crop that can be either stored or used to build fat reserves for winter survival cannot be replaced by most other potential foods. Changes in forest management, introduced pests and pathogens, and increased deer populations have resulted in significant changes in...

Although the functional basis of variable and synchronous seed production (masting behavior) has been extensively investigated, only recently has attention been focused on the proximate mechanisms driving this phenomenon. We analyzed the relationship between weather and acorn production in 15 species of oaks (genus Quercus) from three geographic regions on two continents, with the goals of dete...