Relationship of Soil, Microclimate, and Vegetation on a Sandy Hill

Påhlsson, Lars

doi:10.2307/3543542

Cited by 17 publications

(11 citation statements)

References 4 publications

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“…Påhlsson (1974) described the 1964 community as homogeneous, but it was obvious that in 2008 the plots were very different from each other. Some plots had exposed mineral soil, while others had closed vegetation.…”

Section: Discussionmentioning

confidence: 97%

“…Both locations have a slope angle of about 25 • . In 1964 the south slope was classified as sand steppe (Xeric sand calcareous grasslands, Natura 2000 code 6120, EU Habitat Directive 2002/83/EC), while the north slope consisted of dry heath without shrubs (Påhlsson, 1974) which can be identified as Fennoscandian lowland speciesrich dry to mesic grassland (Natura 2000 code 6270, EU Habitat Directive 2002/83/EC). Ungulate grazing stock have been present during the summer season in the area for at least 100 years (S. Skäll-berg, pers.…”

Section: Locationmentioning

confidence: 99%

“…The pH of the new and the stored soil samples (pH H 2 O and pH KCl ) was analyzed according to Påhlsson (1974) a few days after the recent sampling. Two parts of extractant (H 2 O or 0.2 M KCl) were added to one part of soil (by volume) and shaken for 2 h. After overnight sedimentation, the pH was measured in the suspension with an Orion Research microprocessor ionalyser 901.…”

Section: Soil Analysismentioning

confidence: 99%

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Long-term changes in vegetation and soil chemistry in a calcareous and sandy semi-natural grassland

Bahr

Ellström

Schnoor

et al. 2012

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Discussionmentioning

confidence: 97%

Section: Locationmentioning

confidence: 99%

Section: Soil Analysismentioning

confidence: 99%

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Long-term changes in vegetation and soil chemistry in a calcareous and sandy semi-natural grassland

Bahr

Ellström

Schnoor

et al. 2012

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…The marked effects of slope and aspect on microclimate and soils in calcareous grasslands (Perring 1959;Geiger 1965;Påhlsson 1974;Rorison et al 1986b;Amezaga et al 2004) and on the small-scale distribution of species (Boyko 1947;Perring 1959Perring , 1960Pigott 1978;Weiss et al 1988) have been noted in previous studies. Likewise, the effect of low soil phosphorus and moisture content on the resistance of vegetation to invasion by more competitive species has been stressed.…”

Section:     mentioning

confidence: 99%

“…Perring (1959) showed that the species composition of chalk grassland at many sites in Britain was strongly influenced by slope and aspect. Two distinct topographic gradients lie behind the observed distribution patterns, namely (i) the tendency of slopes facing the equator (and hence intercepting more direct solar radiation) to be both drier and warmer than those facing away from the equator (Geiger 1965;Påhlsson 1974;Radcliffe & Lefever 1981;Rorison et al . 1986a) and (ii) the tendency for soils on relatively steep (> c .…”

Section: Introductionmentioning

confidence: 99%

Influence of slope and aspect on long‐term vegetation change in British chalk grasslands

Bennie¹,

Hill²,

Baxter³

et al. 2006

Journal of Ecology

302

232

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Summary 1The species composition of fragmented semi-natural grasslands may change over time due to stochastic local extinction and colonization events, successional change and/or as a response to changing management or abiotic conditions. The resistance of vegetation to change may be mediated through the effects of topography (slope and aspect) on soils and microclimate. 2 To assess long-term vegetation change in British chalk grasslands, 92 plots first surveyed by F. H. Perring in 1952-53, and distributed across four climatic regions, were re-surveyed during 2001-03. Changes in vegetation since the original survey were assessed by comparing local colonization and extinction rates at the plot scale, and changes in species frequency at the subplot scale. Vegetation change was quantified using indirect ordination (Detrended Correspondence Analysis; DCA) and Ellenberg indicator values. 3 Across all four regions, there was a significant decrease in species number and a marked decline in stress-tolerant species typical of species-rich calcareous grasslands, both in terms of decreased plot occupancy and decreased frequency within occupied plots. More competitive species typical of mesotrophic grasslands had colonized plots they had not previously occupied, but had not increased significantly in frequency within occupied plots. 4 A significant increase in Ellenberg fertility values, which was highly correlated with the first DCA axis, was found across all regions. The magnitude of change of fertility and moisture values was found to decrease with angle of slope and with a topographic solar radiation index derived from slope and aspect. 5 The observed shift from calcareous grassland towards more mesotrophic grassland communities is consistent with the predicted effects of both habitat fragmentation and nutrient enrichment. It is hypothesized that chalk grassland swards on steeply sloping ground are more resistant to invasion by competitive grass species than those on flatter sites due to phosphorus limitation in shallow minerogenic rendzina soils, and that those with a southerly aspect are more resistant due to increased magnitude and frequency of drought events.

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Species richness of Orthoptera declines with elevation while elevational range of individual species peaks at mid elevation

Thomas,

Segar,

Cherrill

2024

Ecology and Evolution

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Species richness has been shown to decrease, and elevational range increase (the Rapoport effect), with elevation as a consequence of biotic and abiotic factors, but patterns are inconsistent across taxonomic groups. Despite being an important indicator taxon and a component of local communities, Orthoptera distributions at higher elevations in Europe remain unclear. We investigated the relationship of Orthoptera species richness and elevational range with elevation in the Pyrenees mountains, Europe. We conducted sweepnetting surveys supplemented by hand‐sampling, at 28 sites stratified by elevation, across three study areas. Using generalised linear models, we found that species richness declined with elevation. Elevation was an important predictor of species richness, but sampling effort and vegetation structure (height and cover) also contributed to estimates of species richness. Using a nonlinear regression to model the elevational range of species over the elevational gradient, we did not observe a Rapoport effect, with elevational range peaking at mid‐elevation instead. Smaller elevational ranges of species found at high elevations may be due to a combination of sampling over a restricted elevational range and the presence of specialist high‐elevation species. We argue that our findings are useful for understanding species distributions with elevation at the interface between local and regional scales. Clarifying the biotic and abiotic predictors of species distribution is important for informing conservation efforts and predicting consequences of climate change.

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Relationship of Soil, Microclimate, and Vegetation on a Sandy Hill

Cited by 17 publications

References 4 publications

Long-term changes in vegetation and soil chemistry in a calcareous and sandy semi-natural grassland

Long-term changes in vegetation and soil chemistry in a calcareous and sandy semi-natural grassland

Influence of slope and aspect on long‐term vegetation change in British chalk grasslands

Species richness of Orthoptera declines with elevation while elevational range of individual species peaks at mid elevation

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