From Individual Behavior to Metapopulation Dynamics: Unifying the Patchy Population and Classic Metapopulation Models

Ovaskainen,; Hanski,

doi:10.2307/3473122

Cited by 35 publications

(50 citation statements)

References 30 publications

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“…Local populations are generally small (median size has been two larval family groups in the 11 487 yearly estimates of local population sizes in 1993-2013) and have a high risk of extinction (annual extinction risk of local populations ranging from 0.19 to 0.60 in 1994-2013; extinction risk is inversely related to population size [2,29]). …”

Section: Materials and Methods (A) Study Systemmentioning

confidence: 99%

Increasing frequency of low summer precipitation synchronizes dynamics and compromises metapopulation stability in the Glanville fritillary butterfly

2015

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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 fluctuations in the size of the metapopulation as a whole has increased, though there is no long-term trend in average abundance; and there is a highly significant increase in the level of spatial synchrony in population dynamics. The increased synchrony cannot be explained by increasing within-year spatial correlation in precipitation, the key environmental driver of population change, or in per capita growth rate. On the other hand, the frequency of drought during a critical life-history stage (early larval instars) has increased over the years, which is sufficient to explain the increasing amplitude and the expanding spatial synchrony in metapopulation dynamics. Increased spatial synchrony has the general effect of reducing long-term metapopulation viability even if there is no change in average metapopulation size. This study demonstrates how temporal changes in weather conditions can lead to striking changes in spatio-temporal population dynamics.

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Section: Materials and Methods (A) Study Systemmentioning

confidence: 99%

Increasing frequency of low summer precipitation synchronizes dynamics and compromises metapopulation stability in the Glanville fritillary butterfly

2015

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“…The morainic uplands adjacent to the alluvial plain function as a regional groundwater recharge area and drain the surrounding plateau and the outwash plain towards the river (Pajnowska and Wiencław, 1984). Groundwater flow is influenced by the highly heterogeneous subsurface; it is focused at hydrogeologic windows and seeps out in the Biebrza valley.…”

Section: Field Sitementioning

confidence: 99%

“…Glacial tills (Pajnowska and Wiencław, 1984;Ber, 2005), however, locally separate the sand and gravel layers, creating confined aquifers of varying extent and resulting in a complex local hydrogeology. The hydrogeological base of the Biebrza catchment consists of Tertiary marls at approximately 0 to −40 m a.s.l.…”

Section: Field Sitementioning

confidence: 99%

“…The supply of exfiltrating groundwater and the presence of shallow groundwater tables is essential for the maintenance of groundwater dependent wetlands and their habitat connectivity (Succow and Joosten, 2001;Ovaskainen and Hanski, 2004). The vegetation in such environments is often found to depend on the quality, quantity and the pattern of river discharge and groundwater-surface water interaction (Wassen and Joosten, 1996;Batelaan et al, 2003) on a local or reach scale.…”

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confidence: 99%

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A hierarchical approach on groundwater-surface water interaction in wetlands along the upper Biebrza River, Poland

Anibas

Verbeiren

Buis

et al. 2012

Hydrol. Earth Syst. Sci.

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Abstract. As recognized in the European Water Framework Directive, groundwater-dependent wetlands and their diverse ecosystems have important functions which need to be protected. The vegetation in such habitats is often dependent on quality, quantity and patterns of river discharge and groundwater-surface water interaction on a local or reach scale. Since groundwater-surface water exchange studies on natural rivers and wetlands with organic soils are scarce, more functional analysis is needed. To this end we combined different field methods including piezometer nests, temperature as tracer and seepage meter measurements. Some of these measurements were used as inputs and/or as validation for the numerical 1-D heat transport model STRIVE. In transient mode the model was used to calculate spatially distributed vertical exchange fluxes from temperature profiles measured at the upper Biebrza River in Poland over a period of nine months. Time series of estimated fluxes and hydraulic head gradients in the hyporheic zone were used to estimate the temporal variability of groundwater-surface water exchange.This paper presents a hierarchical approach for quantifying and interpreting groundwater-surface water interaction in space and time. The results for the upper Biebrza show predominantly upward water fluxes, sections of recharge, however, exist along the reach. The fluxes depend more on hydraulic gradients than on riverbed conductivity. This indicates that the fluvio-plain scale is required for interpreting the exchange fluxes, which are estimated on a local scale. The paper shows that a conceptual framework is necessary for understanding the groundwater-surface water interaction processes, where the exchange fluxes are influenced by local factors like the composition of the riverbed and the position of the measurement on a local scale, and by regional factors like the hydrogeology and topography on a fluvio-plain scale. The hierarchical methodology increases the confidence in the estimated exchange fluxes and improves the process understanding. The accuracy of the measurements and related uncertainties, however, remain challenges for wetland environments. Gaining quantitative information on groundwatersurface water interaction can improve modeling confidence and as a consequence helps to develop effective procedures for management and conservation of valuable groundwater dependent wetlands.

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“…several patches during their lifetime" (Ovaskainen and Hanski 2004). This group requires either a common spawning area for the whole population or the possibility for every individual to spawn in any spawning grounds, and implies that the "patches" are mostly growing/feeding areas.…”

Section: Dispersal Distancementioning

confidence: 99%

Insight on population structure of the Chilean jack mackerel (Trachurus murphyi)

Gerlotto

Gutiérrez

Bertrand

2012

Aquat. Living Resour.

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-The Chilean jack mackerel (Trachurus murphyi) is one of the most important exploited fish populations in the world. Its area of distribution covers the sub-tropical waters of the South Pacific Ocean, from South America up to New Zealand and even Australia. It is subject to high variations in biomass, with annual world catches varying from less than 0.5 to almost 5 million tonnes. Management of this species and its fishery requires a correct understanding of the population structure. Although several hypotheses have been proposed, suggesting that there are up to four independent populations, genetic analysis indicates only a single population in the South Pacific Ocean. We consider the two most probable structures for this population: a "patchy population", where all the fish belong to a single population that expands and contracts depending on the biomass; and a metapopulation, where a source population creates several subpopulations that can remain independent during prolonged periods, depending on the environmental conditions. We studied the conditions for these hypotheses to represent reality, especially the demographic structure and existence of different spawning areas. Using knowledge obtained from fisheries and acoustic surveys, we show that if we apply their definitions strictly, neither of the two hypotheses can be fully rejected. Nevertheless, some particular spatial characteristics observed recently between the Peruvian and Centre-South Chilean parts of the distribution lead us to conclude that the metapopulation definition is likely to better describe the stock. The consequences of each population structure for fisheries management are listed, showing that the metapopulation hypothesis represents a safer definition for stock assessment. We conclude that T. murphyi can be described as a metapopulation, but also that the definitions proposed in the literature on metapopulations are not fully adapted to pelagic fish populations with a basin-scale distribution range, and suggests specific research that could be done in this field.

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From Individual Behavior to Metapopulation Dynamics: Unifying the Patchy Population and Classic Metapopulation Models

Cited by 35 publications

References 30 publications

Increasing frequency of low summer precipitation synchronizes dynamics and compromises metapopulation stability in the Glanville fritillary butterfly

Increasing frequency of low summer precipitation synchronizes dynamics and compromises metapopulation stability in the Glanville fritillary butterfly

A hierarchical approach on groundwater-surface water interaction in wetlands along the upper Biebrza River, Poland

Insight on population structure of the Chilean jack mackerel (Trachurus murphyi)

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