Calamagrostis Canescens: Population Biology of a Clonal Grass Invading Wetlands

Soukupová, Lenka

doi:10.2307/3544965

Cited by 21 publications

(9 citation statements)

References 8 publications

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“…in Dutch, English and Welsh wet heathlands (Berendse and Aerts 1984;Aerts and Berendse 1988;Berendse 1990;Hogg et al 1995;Kirkham 2001;Tomassen et al 2003), the increasing dominance of Deschampsia flexuosa (L.) Trin. in Dutch and English dry heathlands (Berendse and Aerts 1984;Hogg et al 1995;Bakker and Berendse 1999), the spread of Holcus mollis (L.) and Calamagrostis villosa (Chaix) Gmelin in central European understory poor soils and of Calamagrostis canescens (Weber) Roth in continental wetlands (Soukupova 1992), the encroachment of Calamagrostis epigejos (L.) Roth on dunes or sandy soil communities (Soukupova 1992;Bakker and Berendse 1999), and the recent invasion of European salt marshes by Elymus athericus (Link) Kerguélen along the coasts of the North Sea, English Channel and Atlantic Ocean (Van Wijnen et al 1997;Bockelmann and Neuhaus 1999;Valéry et al 2004). This long list of examples unfortunately shows how frequent native invasions are.…”

Section: Native Invasive Species As a New Complementary Approachmentioning

confidence: 99%

“…and Arrhenaterum elatius (L.) beauv. in Dutch and English calcareous meadows (Bobbink and Willems 1987;Soukupova 1992;Hurst and John 1999), the rapid spread of Molinia caerulea (L.) Moench. in Dutch, English and Welsh wet heathlands (Berendse and Aerts 1984;Aerts and Berendse 1988;Berendse 1990;Hogg et al 1995;Kirkham 2001;Tomassen et al 2003), the increasing dominance of Deschampsia flexuosa (L.) Trin.…”

Section: Native Invasive Species As a New Complementary Approachmentioning

confidence: 99%

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Ecosystem-level consequences of invasions by native species as a way to investigate relationships between evenness and ecosystem function

et al. 2008

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Biodiversity is currently undermined worldwide principally as a result of human activities. The irreversibility of species extinction has encouraged the research community to investigate the potential effect of declining species or functional group diversity and/or composition on ecosystem function since the beginning of the 1990s. However, while changes in relative abundance among species (i.e., evenness) are more frequent than extinction of species and are able to cause important changes in ecosystem function, most studies have curiously not examined thoroughly the potential role of that diversity component. The few small-scale experimental manipulations that have so far examined the relationship between evenness and ecosystem function have produced ambiguous results, sometimes indicating an effect on selected functions, and sometimes not. Because one reason for the inconsistency of the previous results may be scale-dependency issues, we propose here an alternative approach, investigation of this relationship directly at the system-level through the opportunity offered by field studies of ecosystemlevel consequences of invasions by native species. Indeed, the specificities of changes in ecosystem structure induced by native invaders compared to exotic ones could constitute a useful tool to improve our understanding of the relationship between evenness and ecosystem function as well as to evaluate the importance of the spatial arrangement of species in the stability of ecosystems.

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Section: Native Invasive Species As a New Complementary Approachmentioning

confidence: 99%

Section: Native Invasive Species As a New Complementary Approachmentioning

confidence: 99%

Ecosystem-level consequences of invasions by native species as a way to investigate relationships between evenness and ecosystem function

et al. 2008

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“…Almost always the species which take an advantage of undisturbed competition and changing environmental conditions are clonal (e.g. Bobbink and Willems, 1987;Soukupova´, 1992 and references therein). Yet the most species-rich communities also consist mainly of clonal species (Kull and Zobel, 1991;Kukk and Kull, 1997;Cantero et al, 1999;Klimesˇet al, 2001).…”

Section: Relationship Between Clonal Mobility and Species Richnessmentioning

confidence: 99%

A comparison of plant communities on the basis of their clonal growth patterns

et al. 2004

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This study was performed to analyse how a vegetative propagation pattern of plants affects the coexistence of species and subsequent species richness of the community. We compared community average clonal growth in the herbal communities of forests, wooded meadows, and open meadows in Laelatu, Estonia. The parameters used for the calculation of the community averages and measured for each species were ramet life span, rhizome branching, and clonal mobility. We also examined the intrinsic (i.e. independent of the environment) relationship between community clonal growth and plant species density. We found strong correlations between the environmental factors (productivity, light availability, and mowing regime) and community averages of clonal growth parameters, while species density was (negatively) correlated only with community average of rhizome increment. The community average of ramet life span decreased with the increasing biomass of the herb layer. No evidence was found to support the hypothesis that species-rich communities may consist of species with more contrasting mobility compared with species-poor communities. Independent of the effect of the environmental factors, species density was positively correlated with ramet density. There was intrinsic positive relationship between species density and community average of ramet life span at open meadow sites and intrinsic negative relationship between species density and community average of rhizome increment at wooded meadow sites. We conclude that in forest communities the capability of clonal plants to forage for light is favoured, while in unmown meadows a competitively strong phalanx growth form is advantageous. We established that ramet turnover increases and vegetative mobility decreases with increasing species diversity, although these two relationships depend strongly on the type of the studied community.

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“…The second scale refers to the local dynamics of the founder populations (e.g. Soukupova 1992;D'Antonio 1993;Kowarik 1995;Luken and Goessling 1995). The local dynamics is of considerable importance for the change in community structure and for the production of propagules.…”

Section: Introductionmentioning

confidence: 99%

Seedling recruitment in the invasive clonal shrub, Mahonia aquifolium Pursh (Nutt.)

Auge

Brandl

1997

Oecologia

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The clonal shrub, Mahonia aquifolium, is an aggressive invader of some forests in central Germany. We analysed the importance of seedling recruitment for the local dynamics of these invasive populations. In contrast to many other clonal plants, repeated seedling recruitment takes place in M. aquifolium, contributing to the colonization of available space within populations. Thus, sexual reproduction is not only important for dispersal to new sites but also for the local invasion␣process. In situations with grass competition (Calamagrostis epigejos) the number of successful recruits is reduced, and clonal growth is the predominant mode of reproduction. Since seedling recruitment results in an increasing number of genets as well as ramets, the investigated populations are still below their carrying capacities. Seedling densities are higher beneath the canopy of adults than outside adult patches, and increase with increasing cover of adult ramets. The spatially clumped pattern of seedling emergence results in density-dependent mortality especially in the most crowded seedling clusters. However, adult neighbourhood imposes a much higher mortality. Therefore, we expect that the importance of seedling recruitment for the dynamics of local M. aquifolium populations will decline as the invasion process continues.

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Calamagrostis Canescens: Population Biology of a Clonal Grass Invading Wetlands

Cited by 21 publications

References 8 publications

Ecosystem-level consequences of invasions by native species as a way to investigate relationships between evenness and ecosystem function

Ecosystem-level consequences of invasions by native species as a way to investigate relationships between evenness and ecosystem function

A comparison of plant communities on the basis of their clonal growth patterns

Seedling recruitment in the invasive clonal shrub, Mahonia aquifolium Pursh (Nutt.)

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