Population Structure of Psammophyte Vegetation

Symonides, Ewa

doi:10.1007/978-94-009-5500-4_12

Cited by 9 publications

(8 citation statements)

References 26 publications

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“…These results suggest that the dominant and more persistent perennial species might regulate the dynamics of the subordinate and more mobile species. A similar result was reported from a field experiment by Symonides (1985). She found that removing the tussocks of dominant grasses from a sand grassland community (Festuco-Koelerietum glaucae) resulted in an increase in the temporal fluctuation of an annual species (Cerastium semidecandrum).…”

Section: Hidden Temporal Aspectssupporting

confidence: 77%

Beyond Trivial Relationships: on the Hidden Aspects of Biodiversity

Bartha

2008

Folia Geobot

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The strong correlation found between detailed and simple measures of biodiversity at landscape-scale may suggest that patterns of detailed diversity measures are artifacts (sensu Palmer et al. 2008, this issue). For example the regional pattern of Compositional Diversity (a measure of within-stand structural complexity) can be considered as a correct but trivial result because this pattern is almost completely determined (at least statistically) by the regional pattern of species richness. However, I argue that this interpretation is misleading. Using spatially-explicit individual-based simulations I demonstrate that fine-scale patterns and assembly rules (between a dominant grass and some annual species) significantly affect the dynamics of diversity, and fine-scale constraints are able to generate regional diversity patterns. Simulations illustrate that patterns that seem to be artifacts in a static view might acquire functional relevance in a temporal-dynamic approach. While a static view suggests that variation of fine-scale community attributes (e.g. Compositional Diversity) is explained by the variation of species richness, a dynamic approach shows the opposite. In the long term, variation of species richness is explained by the patterns of fine-scale community organization. I propose the use of mechanistic simulations coupled with the analyses of within-stand variability and spatial dependence of species combinations to reveal otherwise hidden spatiotemporal aspects of biodiversity.

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Section: Hidden Temporal Aspectssupporting

confidence: 77%

Beyond Trivial Relationships: on the Hidden Aspects of Biodiversity

Bartha

2008

Folia Geobot

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“…For Corynephorus this was simply an increase in tuft size ( Fig. 3G-I; see also Symonides 1985). For 'all other species' an interesting pattern was observed: in the second year a positive association to the pattern of the first year occurred only in the immediate 4 cm neighbourhood and showed a tendency to repulsion at larger scales (Fig.…”

Section: Discussionmentioning

confidence: 80%

“…The species were classified into two groups: (1) the pioneer species Corynephorus canescens and (2) 'all other species'. Corynephorus is considered as a typical pioneer on sandy substrates (Marshall 1967;Symonides 1985). This perennial is capable of renewing its tufts layer by layer and establishing a rich secondary root system.…”

Section: Study Area Species and Data Collectionmentioning

confidence: 99%

Exploring spatiotemporal patterns in early stages of primary succession on former lignite mining sites

Felinks

Wiegand

2008

J Vegetation Science

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Questions: 1. Does random colonization predominate in early stages of primary succession? 2. Do pioneer species facilitate the establishment of later arriving species? 3. Does an initially random distribution change to an aggregated pattern with ongoing succession? Location: Lignite mining region of Lower Lusatia, eastern Germany. Methods: Individual plants were mapped along a 2 m × 28 m transect during three successive years and classified into two groups (1) the pioneer Corynephorus canescens and (2)‘all other species’. Using the pair‐correlation function, univariate point pattern analysis was carried out by applying a heterogeneous Poisson process as null model. Bivariate analysis and a toroidal shift null model were applied to test for independence between the spatial patterns of the two groups separately for each year, as well by exploring spatiotemporal patterns from different years. Results: In the first year Corynephorus and ‘all other species’ showed an aggregated pattern on a spatial scale > 40 cm and in the second and third years a significant attraction for distances between 4 and 12 cm, with an increasing radius in the third year. The analyses of interspecific spatiotemporal dynamics revealed a change from independence to attraction between distances of 4 cm and 16 cm when using Corynephorus as focal species. However, applying ‘all other species’ as focal points results in a significant attraction at distances up to 60 cm in the first year and a diminishing attraction in the second and third years with distances ≤ 6 cm. Conclusions: Facilitative species‐species interactions are present in early stages of primary succession, resulting mainly from pioneer species acting as physical barriers and their ability to capture diaspores being drifted by secondary dispersal along the substrate surface. However, due to gradual establishment of perennial species and their ability of lateral extension by vegetative dispersal, facilitation may influence spatial pattern formation predominantly on short temporal and fine spatial scales.

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“…As a result of such competition, the populations of the same species occurring in different communities may be characterised by different patterns of population dynamics. These patterns were first noted for aclonal plants, which represented a more convenient subject for studies, because of their unitary growth pattern, short life span, and solely generative manner of reproduction (e.g.. Wilkoñ-Michalska 1976;Watkinson and Harper 1978;Symonides 1979aSymonides , 1979bSymonides , 1979cLaw 1981, Faliñska andPiro¿nikow 1983;Watkinson and Davy 1985). Much less known is the population number dynamics in clonal species, with a multi-shoot architecture of individuals, longevity, as well as propagation of both generative and vegetative ways (cf.…”

Section: Introductionmentioning

confidence: 99%

The effect of dominant species on numbers and agę structure of Iris sibirica L. population on blue moor-grass meadow in southern Poland

Kostrakiewicz

2011

Acta Soc Bot Pol

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Two populations of Iris sibirica, a clonal species protected by law in Poland, occurring in patches of Molinietum caeruleae, of similar floristic composition although with different dominant species, were studied. In the Stanis³awice locality, species with a high competitive potential prevailed, contrary to the Opatkowice locality, where the species of low competitive potential dominated. It was established that vegetative propagation ensures the continued presence of populations in both localities, although the proximity of plants with high competitive potential limits the vegetative propagation of ramet clusters of Iris sibirica. Despite the high level of seed production, the recruitment of seedlings in both patches is possible only in artificially created gaps. The field observations support the conclusion that creating gaps allowing for germination of seeds and development of seedlings, as well as eliminating expansive neighbours allowing proliferation of ramet clusters of Iris sibirica, is an affective way of protecting populations of this species.

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Population Structure of Psammophyte Vegetation

Cited by 9 publications

References 26 publications

Beyond Trivial Relationships: on the Hidden Aspects of Biodiversity

Beyond Trivial Relationships: on the Hidden Aspects of Biodiversity

Exploring spatiotemporal patterns in early stages of primary succession on former lignite mining sites

The effect of dominant species on numbers and agę structure of Iris sibirica L. population on blue moor-grass meadow in southern Poland

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