Spatial Clustering and Ecological Crowding of Valley Oak (Quercus lobata, Née) Associated with Shifts in Recruitment Establishment Sites in Southern California
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Establishing a Range-Wide Provenance Test in Valley Oak (Quercus lobata Née) at Two California Sites
We present the methods used to establish a provenance test in valley oak, Quercus lobata. Nearly 11,000 acorns were planted and 88 percent of those germinated. The resulting seedlings were measured after 1 and 2 years of growth, and were outplanted in the field in the winter of 2014-2015. This test represents a long-term resource for both research and conservation.
متن کاملPhenotypic Variation in California Populations of Valley Oak (Quercus lobata Née) Sampled Along Elevational Gradients
California oaks exhibit tremendous phenotypic variation throughout their range. This variation reflects phenotypic plasticity in tree response to local environmental conditions as well as genetic differences underlying those phenotypes. In this study, we analyze phenotypic variation in leaf traits for valley oak adults sampled along three elevational transects and in young seedlings grown from ...
متن کامل1. Distribution and Status of the Valley Oak (quercus Lobata Nee) in California
The valley oak (Quercus lobata Neé) is among the largest and longest lived of the North American oaks, attaining trunk diameters up to 4 m, heights of 12 to 25 m, and ages of 300 years or more. Unique to California, this oak is also one of California’s most familiar and evocative icons. Where they occur, large valley oaks are focal visual and ecological elements of both developed and rural land...
متن کاملInfluence of Winter-Spring Livestock Grazing on Survival and Growth of Quercus lobata and Q. agrifolia Seedlings
The relative importance of livestock grazing in limiting or enhancing oak recruitment remains unclear because results from previous studies have been contradictory. In Santa Barbara County, we have replicated large-scale planting experiments from 1997 to 2001 to determine the effects of cattle and other factors on seedling establishment of valley oak (Quercus lobata) and coast live oak (Q. agri...
متن کاملTree community shifts and Acorn Woodpecker population increases over three decades in a Californian oak woodland
Forest communities change in response to shifting climate, changing land use, and species introductions, as well as the interactions of established species. We surveyed the oak (Quercus L. spp.) community and Acorn Woodpecker (Melanerpes formicivorus (Swainson, 1827)) population within 230 ha of oak forest and savanna in central coastal California in 1979 and 2013 to assess demographic changes ...
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تاریخ انتشار 2018