Changes in large-scale climate alter spatial synchrony of aphid pests

2015 ◽  
Vol 6 (6) ◽  
pp. 610-613 ◽  
Author(s):  
Lawrence W. Sheppard ◽  
James R. Bell ◽  
Richard Harrington ◽  
Daniel C. Reuman
Keyword(s):  
Large Scale ◽  
Spatial Synchrony

scholarly journals Spatial synchrony in vegetation response

2019 ◽  
Author(s):  
Haim Weissman ◽  
Yaron Michael ◽  
Nadav M. Shnerb
Keyword(s):  
Remote Sensing ◽  
Large Scale ◽  
Time Lag ◽  
Remote Sensing Data ◽  
Structured Populations ◽  
Terrestrial Vegetation ◽  
Spatial Synchrony ◽  
Spatially Structured Populations ◽  
Power Law Function ◽  
Over Time

Spatial synchrony is ubiquitous in nature, and its decrease with the distance is an important feature that affects the viability of spatially structured populations. Here we present an empirical study of spatial synchrony in terrestrial vegetation using large scale remote sensing data. The decrease of synchrony with distance, as expressed by the correlation in rate of abundance change at a given time lag, is characterized using a power-law function with stretched-exponential cutoff. The range of these correlations appears to decrease when precipitation increases and to increase over time. The relevance of these results to the viability of populations is discussed.

scholarly journals Large-scale spatial synchrony and cross-synchrony in acorn production by two California oaks

Ecology ◽  
2013 ◽  
Vol 94 (1) ◽  
pp. 83-93 ◽  
Author(s):  
Walter D. Koenig ◽  
Johannes M. H. Knops
Keyword(s):  
Large Scale ◽  
Spatial Synchrony ◽  
Acorn Production

scholarly journals Phase-dependent outbreak dynamics of geometrid moth linked to host plant phenology

2009 ◽  
Vol 276 (1676) ◽  
pp. 4119-4128 ◽  
Author(s):  
Jane U. Jepsen ◽  
Snorre B. Hagen ◽  
Stein-Rune Karlsen ◽  
Rolf A. Ims
Keyword(s):  
Host Plant ◽  
Large Scale ◽  
Spatial Dynamics ◽  
Growing Season ◽  
Birch Forest ◽  
Moran Effect ◽  
Spatial Synchrony ◽  
Spring Phenology ◽  
Growth And Survival ◽  
Spread Model

Climatically driven Moran effects have often been invoked as the most likely cause of regionally synchronized outbreaks of insect herbivores without identifying the exact mechanism. However, the degree of match between host plant and larval phenology is crucial for the growth and survival of many spring-feeding pest insects, suggesting that a phenological match/mismatch-driven Moran effect may act as a synchronizing agent. We analyse the phase-dependent spatial dynamics of defoliation caused by cyclically outbreaking geometrid moths in northern boreal birch forest in Fennoscandia through the most recent massive outbreak (2000–2008). We use satellite-derived time series of the prevalence of moth defoliation and the onset of the growing season for the entire region to investigate the link between the patterns of defoliation and outbreak spread. In addition, we examine whether a phase-dependent coherence in the pattern of spatial synchrony exists between defoliation and onset of the growing season, in order to evaluate if the degree of matching phenology between the moth and their host plant could be the mechanism behind a Moran effect. The strength of regional spatial synchrony in defoliation and the pattern of defoliation spread were both highly phase-dependent. The incipient phase of the outbreak was characterized by high regional synchrony in defoliation and long spread distances, compared with the epidemic and crash phase. Defoliation spread was best described using a two-scale stratified spread model, suggesting that defoliation spread is governed by two processes operating at different spatial scale. The pattern of phase-dependent spatial synchrony was coherent in both defoliation and onset of the growing season. This suggests that the timing of spring phenology plays a role in the large-scale synchronization of birch forest moth outbreaks.

scholarly journals Population fluctuations and spatial synchrony in an arboreal rodent

Oecologia ◽  
2019 ◽  
Vol 191 (4) ◽  
pp. 861-871 ◽  
Author(s):  
Vesa Selonen ◽  
Jaanus Remm ◽  
Ilpo K. Hanski ◽  
Heikki Henttonen ◽  
Otso Huitu ◽  
...  
Keyword(s):  
Large Scale ◽  
Extinction Risk ◽  
Winter Precipitation ◽  
Climatic Conditions ◽  
Small Scale ◽  
Population Fluctuations ◽  
Spatial Synchrony ◽  
Flying Squirrels ◽  
Study Sites ◽  
Over Time

Abstract Climatic conditions, trophic links between species and dispersal may induce spatial synchrony in population fluctuations. Spatial synchrony increases the extinction risk of populations and, thus, it is important to understand how synchrony-inducing mechanisms affect populations already threatened by habitat loss and climate change. For many species, it is unclear how population fluctuations vary over time and space, and what factors potentially drive this variation. In this study, we focus on factors determining population fluctuations and spatial synchrony in the Siberian flying squirrel, Pteromys volans, using long-term monitoring data from 16 Finnish populations located 2–400 km apart. We found an indication of synchronous population dynamics on a large scale in flying squirrels. However, the synchrony was not found to be clearly related to distance between study sites because the populations seemed to be strongly affected by small-scale local factors. The regularity of population fluctuations varied over time. The fluctuations were linked to changes in winter precipitation, which has previously been linked to the reproductive success of flying squirrels. Food abundance (tree mast) and predator abundance were not related to population fluctuations in this study. We conclude that spatial synchrony was not unequivocally related to distance in flying squirrels, as has been observed in earlier studies for more abundant rodent species. Our study also emphasises the role of climate in population fluctuations and the synchrony of the species.

CLIMATE CAUSES LARGE-SCALE SPATIAL SYNCHRONY IN POPULATION FLUCTUATIONS OF A TEMPERATE HERBIVORE

Ecology ◽  
2005 ◽  
Vol 86 (6) ◽  
pp. 1472-1482 ◽  
Author(s):  
Vidar Grøtan ◽  
Bernt-Erik SÆther ◽  
Steinar Engen ◽  
Erling Johan Solberg ◽  
John D. C. Linnell ◽  
...  
Keyword(s):  
Large Scale ◽  
Population Fluctuations ◽  
Spatial Synchrony

scholarly journals Large-scale spatial synchrony in red squirrel populations driven by a bottom-up effect

Oecologia ◽  
2020 ◽  
Vol 192 (2) ◽  
pp. 425-437
Author(s):  
Tytti Turkia ◽  
Jussi Jousimo ◽  
Juha Tiainen ◽  
Pekka Helle ◽  
Jukka Rintala ◽  
...  
Keyword(s):  
Large Scale ◽  
Red Squirrel ◽  
Spatial Synchrony ◽  
Bottom Up

scholarly journals Large-scale spatial synchrony in red squirrel (Sciurus vulgaris) sex ratios

2016 ◽  
Vol 97 (3) ◽  
pp. 744-752
Author(s):  
Tytti Turkia ◽  
Vesa Selonen ◽  
Jon Egbert Brommer
Keyword(s):  
Large Scale ◽  
Sex Ratios ◽  
Red Squirrel ◽  
Spatial Synchrony ◽  
Sciurus Vulgaris
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