Spatial Synchrony in Population Dynamics ∗
نویسندگان
چکیده
Andrew Liebhold,1 Walter D. Koenig,2 and Ottar N. Bjørnstad3 1Northeastern Research Station, USDA Forest Service, Morgantown, West Virginia 26505; email: [email protected] 2Hastings Reservation, University of California, Berkeley, Carmel Valley, California 93924; email: [email protected] 3Departments of Entomology and Biology, Pennsylvania State University, University Park, Pennsylvania 16802; email: [email protected]
منابع مشابه
Using mechanistic models to understand synchrony in forest insect populations: the North American gypsy moth as a case study.
In many forest insects, subpopulations fluctuate concurrently across large geographical areas, a phenomenon known as population synchrony. Because of the large spatial scales involved, empirical tests to identify the causes of synchrony are often impractical. Simple models are, therefore, a useful aid to understanding, but data often seem to contradict model predictions. For instance, chaotic p...
متن کاملIncreasing frequency of low summer precipitation synchronizes dynamics and compromises metapopulation stability in the Glanville fritillary butterfly.
Climate change is known to shift species' geographical ranges, phenologies and abundances, but less is known about other population dynamic consequences. Here, we analyse spatio-temporal dynamics of the Glanville fritillary butterfly (Melitaea cinxia) in a network of 4000 dry meadows during 21 years. The results demonstrate two strong, related patterns: the amplitude of year-to-year fluctuation...
متن کاملSynchrony of population dynamics of two vineyard arthropods occurs at multiple spatial and temporal scales.
When populations are synchronized, they rise and fall together. Analysis of population synchrony and its relationship to distance has played a major role in population ecology but has been absent from most studies of managed populations, such as agricultural arthropods. The extent to which populations at different locations are synchronized reflects the relative roles of shared environmental im...
متن کاملSynchrony and second-order spatial correlation in host parasitoid systems
1. Recent theoretical studies on population synchrony have focused on the role of dispersal, environmental correlation and density dependence in single species. Trophic interactions have received less attention. We explored how trophic interactions affect spatial synchrony. 2. We considered a host–parasitoid coupled map lattice to understand how the selforganizing spatial patterns generated by ...
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 کاملSpatial Synchrony in Forest Insect Outbreaks: Roles of Regional Stochasticity
Spatial synchrony, that is, correlated population fluctuation over wide geographical areas, has been detected in diverse taxa and over various geographical scales. The most commonly suggested mechanisms to explain spatial synchrony include dispersal and regional stochasticity (i.e., “the Moran effect”). We analyzed landscape-scale historical outbreak data for six forest insect species: spruce b...
متن کامل