The Relationship between Local Species Richness and Species Pool: A Case Study from the High Mountains of the Greater Caucasus

Akatov, V. V.; Chefranov, S. G.; Акатова, Т. В.

doi:10.1007/s11258-004-5088-5

Cited by 20 publications

(5 citation statements)

References 30 publications

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“…Study scale is an important factor that drives relationships between local a-diversity and species pool (Koleff and Gaston 2002;Dufour et al 2006) and thereby the small area of springs might deepen the competitive exclusion and might be therefore responsible for our result. Our result supports the view that inherent linear or curvilinear relationships between local a-diversity and the size of regional species pool (Fox and Srivastava 2006) might not be always manifested (Akatov et al 2005). Our study demonstrates the different pattern of vascular plants and bryophyte species richness along environmental gradients in particular regions.…”

Section: Determinants Of A-diversitysupporting

confidence: 88%

Patterns of bryophyte and vascular plant richness in European subalpine springs

et al. 2011

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The diversity of spring habitats can be determined not only by local environmental conditions, but also by large-scale biogeographical effects. The effects can differ across various groups of organisms. We compared a-, b-and c-diversity patterns of bryophytes and vascular plants of (sub)-alpine springs in three contrasting mountain ranges: Alps (Switzerland), Balkans (Bulgaria), Western Carpathians (Slovakia, Poland). We used univariate and multivariate statistics to test for the effects of pH, conductivity, altitude, slope, mean annual temperature and annual precipitation on diversity patterns of both taxonomic groups and compared diversity patterns among the regions for particular pH and conductivity classes. We identified acidophyte and basiphyte, calcifuge and calcicole species using species response modelling. All regions displayed significant relationship between conductivity and a-diversity of vascular plants. Bulgaria showed the highest a-diversity of vascular plants for the middle part of the conductivity gradient. For both taxonomic groups, the b-diversity in the middle part of gradient was highest in Swiss Alps. The total species pool was lowest in Bulgaria. The percentage of basiphyte and calcicole species was highest in the Alps. In (sub)alpine springs, mineral richness was a better determinant of vascular plant a-diversity than pH, and the extent of the alpine area did not coincide with a-diversity. Observed interregional differences in diversity patterns could be explained by the different proportion of limestone bedrock and different biogeographic history. The Electronic supplementary material The online version of this article (doi:10.1007/s11258-011-9969-0) contains supplementary material, which is available to authorized users. 123Plant Ecol (2012) 213:237-249 DOI 10.1007/s11258-011-9969-0 differences in a-diversity between both taxonomic groups are presumably result of the different rates of adaptation processes.

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Section: Determinants Of A-diversitysupporting

confidence: 88%

Patterns of bryophyte and vascular plant richness in European subalpine springs

et al. 2011

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“…In addition, this second analysis shows that isolation is a question of neighborhood scale. While we have shown that small habitat fragments tend to have less rich species pools (perennials) than equivalent portions of continuous habitat, it seems that increasing the (reachable) amount of habitat in their neighborhood effectively increases this richness (Akatov, Chefranov, & Akatova, ; Pärtel & Zobel, ; Schamp, Laird, & Aarssen, ). This seems consistent with the hypothesis that the matrix surrounding habitat fragments is more permeable than water, especially for perennial plants (e.g., Butaye, Jacquemyn, Honnay, & Hermy, ).…”

Section: Discussionmentioning

confidence: 92%

Islands, mainland, and terrestrial fragments: How isolation shapes plant diversity

Martín-Queller

Albert

Dumas

et al. 2017

Ecology and Evolution

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The fragmentation of natural habitats is a major threat for biodiversity. However, the impact and spatial scale of natural isolation mechanisms leading to species loss, compared to anthropogenic fragmentation, are not clear, mainly due to differences between fragments and islands, such as matrix permeability. We studied a 500 km2 Mediterranean region in France, including urban habitat fragments, continuous habitat, and continental‐shelf islands. On the basis of 295 floristic relevés, we built species–area relationships to compare isolation in fragments after urbanization, with continuous habitat and continental‐shelf islands. We assumed either no dispersal, infinite dispersal, or estimated intermediate levels of habitat reachability through graph theory. Isolation mechanisms occurred in fragments but with a lower strength than in near‐shore islands, and most importantly affected perennial plants. Annual plants were less affected, probably due to their smaller size and shorter life cycle. Isolation occurred at landscape level in fragments and at patch level in islands. The amount of reachable habitat (accounting for spatial configuration) explained local species richness in both systems, but the amount of habitat (no consideration of spatial configuration) was already a good predictor. These results suggest an important role of habitat amount around fragments in mitigating the isolation effects observed in near‐shore islands, and the importance of carefully considering different functional groups.

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“…Bruun, 2000;Cousins and Eriksson, 2002;Öster et al, 2007). However, it has been recognized that plant community structure and diversity may also be affected by neighbouring habitats via effects on the regional species pool and dispersal limitations (Akatov et al, 2005;Pärtel et al, 1996;Söderström et al, 2001;Zobel, 1997). It is supposed that the habitats surrounding certain plant communities represent sources of species which are not regular components of the given community, as their ecological optima lie in another vegetation type, but which can survive under suboptimal conditions (accessory or satellite species).…”

Section: Introductionmentioning

confidence: 99%

Landscape effects on diversity of semi-natural grasslands

Janišová¹,

Michalcová²,

Bacaro³

et al. 2014

Agriculture, Ecosystems & Environment

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We studied how the landscape structure (percentage cover and diversity of surrounding habitats) affects different components of species diversity (alpha, beta and gamma) of vascular plants in semi-natural grasslands in the Slovak Republic. We analyzed all grasslands combined as well as four main types delimited according to their position along a moisture gradient (xerophilous, sub-xerophilous, mesophilous and wet grasslands). We used grassland records stored in the Slovak Vegetation Database. The geographically stratified dataset included 3795 plots with 1221 species of vascular plants. Along with the total number of species in the vegetation plots, we considered the numbers of target grassland species, forest species, archaeophytes, neophytes and species with high fidelity to non-natural habitats. The landscape parameters based on CORINE land cover maps and the National Grassland Inventory, were calculated for plot neighbourhoods of 4km2. Spatially constrained rarefaction curves were constructed to examine how different diversity components behave with changing structure of the surrounding landscape. Our study revealed that alpha diversity was affected by both percentage cover and diversity of different habitats in the plot neighbourhood. It increased with increasing proportion or diversity of different natural and semi-natural habitats and decreased with increasing proportion or diversity of non-natural habitats in the surrounding landscape. Beta and gamma diversities showed opposite pattern to that of alpha diversity for most analyzed factors. Alpha diversity in sub-xerophilous and mesophilous grasslands was more susceptible to changes in landscape structure than alpha diversity in xerophilous or wet grasslands. Regression trees and linear or quadratic regression models revealed that in xerophilous or wet grasslands, high alpha diversity was best predicted by a high proportion of ecologically valuable grasslands in the surroundings. In sub-xerophilous and mesophilous grasslands, the best predictor was proportion of natural and semi-natural habitats followed by the proportion of non-natural habitats. The detected pattern regarding alpha, beta and gamma diversity calculated for grassland target species did not differ from the pattern for the whole species assemblage. However, the surrounding landscape affected the number, proportion and cover of species typical of forest or non-natural habitats (including alien species) in the plots. We explain the results by the interplay of two main mechanisms: species pool and spatial mass effects. In our study, the effect of species pool on alpha diversity was stronger than the spatial mass effect. Based on differences indicated in the responses of various grassland types to the surrounding landscape structure, we suggest adoption of community type specific conservation measures

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The Relationship between Local Species Richness and Species Pool: A Case Study from the High Mountains of the Greater Caucasus

Cited by 20 publications

References 30 publications

Patterns of bryophyte and vascular plant richness in European subalpine springs

Patterns of bryophyte and vascular plant richness in European subalpine springs

Islands, mainland, and terrestrial fragments: How isolation shapes plant diversity

Landscape effects on diversity of semi-natural grasslands

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