منابع مشابه
Large-scale spatial synchrony and cross-synchrony in acorn production by two California oaks.
Seed production that varies greatly from year to year, known as "masting" or "mast-fruiting" behavior, is a population-level phenomenon known to exhibit geographic synchrony extending, at least in some cases, hundreds of kilometers. The two main nonexclusive hypotheses for the driver of such geographically extensive synchrony are (1) environmental factors (the Moran effect), and (2) the mutual ...
متن کاملSerotiny in California Oaks
Although prolonged seed retention, or serotiny, is believed to be an adaptation to highly variable environments such as the Mediterranean regions of California, no prior study has systematically investigated the prevalence of seed retention among California oaks (family Fagaceae), the dominant woody taxon in California foothill woodlands. We quantified the extent to which acorns were retained i...
متن کاملPatterns of Geographic Synchrony in Growth and Reproduction of Oaks within California and Beyond1
We measured patterns of spatial synchrony in growth and reproduction by oaks using direct acorn surveys, published data on acorn production, and tree-ring chronologies. The two data sets involving acorn production both indicate that acorn crops are detectably synchronous over areas of at least 500 to 1,000 km not only within individual species but among species that require the same number of y...
متن کاملWithin-population spatial synchrony in mast seeding of North American oaks
Mast seeding, the synchronous production of large crops of seeds, has been frequently documented in oak species. In this study we used several North American oak data-sets to quantify within-stand (!10 km) synchrony in mast dynamics. Results indicated that intraspecific synchrony in seed production always exceeded interspecific synchrony and was essentially constant over distances ranging from ...
متن کاملSex Allocation in California Oaks: Trade-Offs or Resource Tracking?
Trade-offs in sex resource allocation are commonly inferred from a negative correlation between male and female reproduction. We found that for three California oak species, aboveground annual net productivity (ANP) differences among individuals were primarily correlated with water availability and soil fertility. Reproductive biomass increased with ANP, but the relative allocation to reproduct...
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ژورنال
عنوان ژورنال: Bulletin of the Ecological Society of America
سال: 2013
ISSN: 0012-9623
DOI: 10.1890/0012-9623-94.1.89