The Clematis fremontii Var. Riehlii Population in the Ozarks

Erickson, Ralph O.

doi:10.2307/2394445

Cited by 47 publications

(29 citation statements)

References 20 publications

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“…A very typical example of this scale effect on species distribution is the case of Clematis fremontii in the Ozark glades of Missouri (Erickson 1945) which looks like a continuously distributed species at the continental scale but has strongly clustered populations at the landscape scale. These coarse estimates likely match niche breadth measures obtained from similarly coarse data but not the finer, plot-based, resolution of co-occurrence based niche breadth estimates.…”

Section: Discussionmentioning

confidence: 99%

Of niches and distributions: range size increases with niche breadth both globally and regionally but regional estimates poorly relate to global estimates

et al. 2018

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The relationship between species' niche breadth (i.e. the range of environmental conditions under which a species can persist) and range size (i.e. the extent of its spatial distribution) has mostly been tested within geographically restricted areas but rarely at the global extent. Here, we not only tested the relationship between range size (derived from species' distribution data) and niche breadth (derived from species' distribution and co-occurrence data) of 1255 plant species at the regional extent of the European Alps, but also at the global extent and across both spatial scales for a subset of 180 species. Using correlation analyses, linear models and variation partitioning, we found that species' realized niche breadth estimated at the regional level is a weak predictor of species' global niche breadth and range size. Against our expectations, distribution-derived niche breadth was a better predictor for species' range size than the co-occurrence-based estimate, which should, theoretically, account for more than the climatically determined niche dimensions. Our findings highlight that studies focusing on the niche breadth vs range size relationship must explicitly consider spatial mismatches that might have confounded and diminished previously reported relationships.

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Section: Discussionmentioning

confidence: 99%

Of niches and distributions: range size increases with niche breadth both globally and regionally but regional estimates poorly relate to global estimates

et al. 2018

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“…Erickson 1945;Bullock et al 2000), however, multiple-scale distribution patterns of invasive species tend to be less well documented, even for major pest species. One notable exception lies in the extensive records of the British flora, from which are derived such works as Collingham et al's (2000) study on invasive weeds.…”

Section: Ecological Correlates Of Invasive Species' Distributionsmentioning

confidence: 99%

Spatial Segregation of Congeneric Invaders in Central Pennsylvania, USA

Allen

Shea

2006

Biol Invasions

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Carduus acanthoides and Carduus nutans (plumeless and musk thistles) are among the most noxious weeds in the United States of America, presenting a serious challenge in cropping and pasture systems. Unfortunately, a lack of detailed spatial distribution information hampers both our ability to understand the factors affecting their invasive success, and the effectiveness of monitoring and management efforts. To examine patterns of distribution and co-occurrence at a local level, we sampled a 5000 km 2 area of central Pennsylvania that cut a transect across known areas of C. acanthoides and C. nutans infestation. A number of potential environmental explanatory variables were recorded and analyzed to examine whether they correlated with observed species distribution patterns. Patterns of forest density and spatial aggregation of the thistles were the primary covariates that significantly impacted both speciesÕ distributions. The survey established that the frequency of sightings for each species diminished as the ranges converged, with only brief overlap: the two species are strongly negatively correlated in space. Understanding environmental correlates of infestation and the pattern of spatial dissociation of these two invasive species is an important step towards an improved understanding of the mechanisms underlying their invasive potential, and hence towards effective weed control.

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“…Historically, there has been considerable interest in the spatial distribution of plants across a range of scales (Erickson, 1945;Forman, 1964) together with the environmental and demographic factors determining these patterns (Hutchings, 1997). The sustainable management of plant resources also depends critically upon an understanding of the spatial distribution and population structure of the harvested species (Boll et al, 2005).…”

Section: Introductionmentioning

confidence: 99%