Dynamics of <i>Vaccinium myrtillus</i> patches in mountain spruce forest

Maubon, Michel; Ponge, Jean‐François; André, Jean

doi:10.2307/3236233

Cited by 22 publications

(17 citation statements)

References 16 publications

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“…So far, open plant communities with sparse cover, grazed or abandoned and irregularly disturbed by climatic extremes have been studied. In other types of plant communities plant mobility of all present species has been studied rarely (but see Maubon et al 1995;Økland 1995). Plant mobility in grasslands has been inferred from year-toyear changes in species composition (Glenn & Collins 1990, 1993Stampfli 1995;Hobbs & Mooney 1995;Zhang & Skarpe 1995) from cumulative species numbers and from cumulative species frequency (van der Maarel & Sykes 1993Sykes et al 1994;Pärtel & Zobel 1995;van der Maarel et al 1995;van der Maarel 1996;Geißelbrecht-Taferner et al 1997) and from persistence of species in particular subplots (Herben et al 1993(Herben et al , 1997.…”

Section: Introductionmentioning

confidence: 99%

Small‐scale plant mobility in a species‐rich grassland

Klimeš

1999

J Vegetation Science

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Abstract. Plant mobility was studied in a species‐rich grassland in S. Moravia (Czech Republic) at scales from 0.0025 to 2.25 m2. Cumulative species numbers, cumulative species frequencies and the distribution of distances between sites of occurrence in particular years were established using data collected from 1991 to 1997. The observed values were compared with null models of completely random and restricted random movement of the plants. Most plants persisted at a spot more frequently than expected from the completely random model and with a few exceptions they also spread to neighbouring subplots more often than expected. Cumulative species numbers were between the ranges predicted by the two random models and increased linearly during the 7‐yr period at all scales, indicating a large species pool. The role of clonal spreading and of generative reproduction depended on the growth form of the species. I conclude that a high species richness is not necessarily linked with a high plant mobility, even if coexistence of plant species may be promoted by plant mobility.

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Section: Introductionmentioning

confidence: 99%

Small‐scale plant mobility in a species‐rich grassland

Klimeš

1999

J Vegetation Science

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“…High species turnover in non-successional systems is associated with factors such as: (1) weather fluctuations that promote establishment by seed (Grubb 1988;Rusch & van der Maarel 1992;Hobbs & Mooney 1995;van der Maarel & Sykes 1997), (2) high rates of gap formation (van der Maarel & Sykes 1997, though see Zhang & Skarpe 1995), (3) a high proportion of species with short life spans (Miles 1979;van der Maarel & Sykes 1993), (4) young age of clonal populations (Maubon et al 1995;Zhang & Skarpe 1995) and (5) high number of potential colonizers, i. e. large regional species pools (Glenn & Collins 1992). This variety of results indicates that vegetation dynamics is complex and that our understanding is still rudimentary.…”

Section: Introductionmentioning

confidence: 99%

How fast is the carousel? Direct indices of species mobility with examples from an Oklahoma grassland

Palmer

Rusch

2001

J Vegetation Science

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Abstract. Current interest in small-scale species dynamics has led to a proliferation of mobility indices. We advocate the use of direct measures of mobility such as immigration rate, extinction rate, residence time, and carousel time. We also demonstrate that the null expectation of cumulative frequency under different null models can be calculated explicitly. Species can depart from the commonly-used 'random reassignment' model simply because of longevity, and not mobility per se. We therefore prefer a random immigration null model, which assumes that immigration locations are randomized.We examined mobility patterns of selected plant species, studied in 256 quadrats of each of four grains (ranging from 1/64 m 2 to 1 m 2 ) in an Oklahoma grassland. Residence times and carousel times can be centuries or even millennia for some species. We explore the numerical and biological reasons for relationships between mobility statistics. Mobility statistics are fairly consistent among grains and years, although the residence times of species exhibit some subtle scale dependence. Species depart from a random immigration model very slightly -but the departure is consistent: species tend to re-occupy previously vacated space more often than expected due to chance. We believe that the use of direct indices will facilitate the study of how species characteristics influence mobility.

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“…Herbaceous eco-units are encircled by bilberry heath with a humimor humus Maubon et al 1995). At this altitude, the competition between heath and spruce for the colonisation of herbaceous eco-units generally favours the latter.…”

Section: Methodsmentioning

confidence: 99%

Lumbricus terrestris L. distribution within an experimental humus mosaic in a mountain spruce forest

Bernier¹,

Ponge²

1998

Biology and Fertility of Soils

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An experiment was designed at a mountain site to study the distribution of adult Lumbricus terrestris in relation to a small-scale mosaic of humus forms representative of different stages of a spruce forest ecosystem. Good agreement was found between distribution in the mosaic and that in the field. ANOVA tests demonstrated the strong influence of humus form on earthworm abundance when comparing a vermimull (high earthworm burrowing activity) taken from a spruce regeneration site (61.8 individuals m ). The same pattern was found with individual biomass, but with lower significance. Main differences observed in the experimental design were attributed to the immediate carrying density of the humus forms. A distinction was made between humus profiles built up with or without spruce cover. In the latter case (regeneration site and bilberry heath), the immediate carrying capacity indicated by the experimental approach overestimated the field density by a factor of 4. Under spruce this overestimate was even higher (approximately 10 times too high in an adult spruce stand (160 years old) and 30 times too high under moss cover). The increase in density due to experimental conditions was not determined for leptomoder humus accumulated under the actively growing spruce stand (60 years old) since the earthworm density was near zero in both cases. Relationships between humus form and earthworm populations are discussed.

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Dynamics of Vaccinium myrtillus patches in mountain spruce forest

Cited by 22 publications

References 16 publications

Small‐scale plant mobility in a species‐rich grassland

Small‐scale plant mobility in a species‐rich grassland

How fast is the carousel? Direct indices of species mobility with examples from an Oklahoma grassland

Lumbricus terrestris L. distribution within an experimental humus mosaic in a mountain spruce forest

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