Long-term demographic variation in range-margin populations ofGypsophila fastigiata

Bengtsson, Karin

doi:10.1007/bf02803093

Cited by 8 publications

(17 citation statements)

References 33 publications

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“…However, no observations were available for 2002. Sites D and C represent the lower distribution limits of C. rosae and fitness may be reduced, as was found for several other species growing at the margins of their distribution area (Bengtsson, 2000;Gaudeul et al, 2000). Table 3 that averaged over all available dynamic information for the plots.…”

Section: Discussionmentioning

confidence: 99%

“…For long-lived species, conclusions based on only 1 or 2 years of study may be misleading, and the importance of long-term demographic studies has frequently been stressed. Long-term observations enable critical stages of population development and environmental factors causing population changes to be detected (Bengtsson, 2000). Population development and/or extinction can then be predicted.…”

Section: Introductionmentioning

confidence: 99%

“…Long-term studies of plant populations have been mainly concerned with annuals, biennials (Symonides, 1987;Watkinson, 1990), and perennials of lowland ecosystems (Inghe and Tamm, 1985;Falinska, 1991;Willems and Bik, 1991;Bengtsson, 1993Bengtsson, , 2000Svensson et al, 1993;Woodward, 1997;Menges and Dolan, 1998). Populations of alpine or arctic species have rarely been studied for longer periods (Callaghan, 1976;Carlsson and Callaghan, 1991;Diemer, 1992;Forbis and Doak, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Long-term Population Development and Spatial Pattern of Carex curvula Subspecies

Erschbamer¹,

Winkler²

2005

Arctic, Antarctic, and Alpine Research

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Long-term Population Development and Spatial Pattern of Carex curvula Subspecies

Erschbamer¹,

Winkler²

2005

Arctic, Antarctic, and Alpine Research

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“…Generally, marginal populations of species with disjunct distributions are more sensitive to environmental variation than more continuous, central populations of the same species (Bengtsson 2000;Hunter 2002). Management can potentially maintain the population size high enough to avoid extinction due to an unpredictable disturbance event of great magnitude.…”

Section: Discussionmentioning

confidence: 99%

Seashore disturbance and management of the clonalArctophila fulva: Modelling patch dynamics

Rautiainen

Laine

Aikio

et al. 2004

Applied Vegetation Science

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Methods:We constructed a matrix population model based on colonization and disappearance events and patch size changes of A. fulva. Patches were divided into hydric and nonhydric zones according to proximity to the seashore and intensity of disturbance. Perturbation analyses were carried out in order to identify transitions critical for population growth. Seed bank and seed germination studies provided background information for the model design. Results: A. fulva patches observed in the more disturbed hydric zone (closest to the sea) increased in number, as did the total number of patches. However, the number of patches in the less disturbed non-hydric zone decreased. Conclusions: Short-term dynamics of the A. fulva population at Liminka Bay seem to be determined by environmental fluctuations, which cause annual variation in transition rates between patch size classes. The long-term dynamics are probably governed by initiation of primary succession by isostatic land uplift. Increased disturbance at the water's edge may promote persistence of A. fulva through reduced interspecific competition. Our results suggest that shoreline disturbance of the hydric zone is sufficient for maintaining a viable population. Competitive exclusion of A. fulva in the non-hydric zone may be delayed by management practices, such as mowing.Keywords: Arctophila fulva var. pendulina; Bothnian Bay; Hydric zone; Lefkovitch matrix model; Liminka Bay; Perturbation; Seashore.Nomenclature: Hämet-Ahti et al. (1998).Abbreviations: LTRE = Life table response experiment; TTC = 2,3,5-triphenyl-2H-tetrazolium chloride.

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“…The persistence of northern peripheral populations can be better addressed by modelling their dynamics and the spatiotemporal variation in fitness components. Such studies on northern populations of woody and herbaceous perennials have found that their persistence depends mostly on the survival of mature individuals, and less on individual reproduction (Bengtsson 1993(Bengtsson , 2000Nantel and Gagnon 1999). Remnant dynamics allow the populations to bridge periods of unfavourable environmental conditions (Eriksson 1996) and is common among long-lived perennials García 2003García , 2008.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of isolatedSaponaria bellidifoliaSm. populations at northern range periphery

Csergö

Molnár

García³

2010

Population Ecology

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Four populations of Saponaria bellidifolia situated at the species’ northern range periphery (Apuseni Mountains, southeastern Carpathians) were monitored over a period of 5 years. They were chosen to represent different habitat types (rocky, fixed screes, open screes and grassy), disturbance regime (fire), and population sizes (categorized as large and small). The reproductive effort was quantified, and matrix models were used to describe the population dynamics and to assess population viability. Saponaria bellidifolia had very stable population dynamics in the harsh and stable abiotic conditions of the outcrops where populations occur. Habitat conditions exerted a notable influence on the species’ population reproductive performance, growth rate, and vital rates, whereas population size and climate did not have a clear‐cut effect on the dynamics of the species. Saponaria bellidifolia maintains viable populations in the southeastern Carpathians, at its northern range periphery.

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Long-term demographic variation in range-margin populations ofGypsophila fastigiata

Cited by 8 publications

References 33 publications

Long-term Population Development and Spatial Pattern of Carex curvula Subspecies

Long-term Population Development and Spatial Pattern of Carex curvula Subspecies

Seashore disturbance and management of the clonalArctophila fulva: Modelling patch dynamics

Dynamics of isolatedSaponaria bellidifoliaSm. populations at northern range periphery

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