Evidence for age-structured depensation effect in fragmented plant populations: The case of the Mediterranean endemic Anchusa sardoa (Boraginaceae)

Budroni, Marcello A.; Farris, Emmanuele; Zirulia, Andrea; Pisanu, Stefania; Filigheddu, Rossella Speranza; Rustici, Mauro

doi:10.1016/j.ecocom.2014.09.007

Cited by 9 publications

(10 citation statements)

References 62 publications

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“…Studying presence / absence or classes of abundance only at the moment of peak flowering means that we cannot differentiate between seed to juvenile regeneration and adult survival as causes of significant transitions among years. The regeneration of young plants is well known to be of vital importance for the viability of annual and perennial plant populations in diverse situations, as the references cited above and others (Budroni et al, 2014;Colling & Matthies, 2006) including the Mediterranean region (Matias, Zamora, & Castro, 2012;Thompson, 2005) illustrate. In addition, in typical arid Mediterranean habitats where most endemic species occur, adult survival is critical for long-term population persistence (García & Zamora, 2003;Thompson, 2005).…”

Section: Pertinence Of the Methodsmentioning

confidence: 99%

Assessing vulnerability of listed Mediterranean plants based on population monitoring

Gauthier¹,

Pons²,

Fisogni³

et al. 2019

Journal for Nature Conservation

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Section: Pertinence Of the Methodsmentioning

confidence: 99%

Assessing vulnerability of listed Mediterranean plants based on population monitoring

Gauthier¹,

Pons²,

Fisogni³

et al. 2019

Journal for Nature Conservation

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“…Additionally, spatiotemporally non-uniform invasion patterns were attributed to variation in the Allee threshold (Tobin et al 2007). The authors did not investigate the causes of this variability, but other investigations corroborate that Allee efects vary in natural populations and shed light on likely causes and their implications Hofman et al 2010;Gray and Arnott 2011;Dooley et al 2013;Budroni et al 2014;Bürgi et al 2014;Kaul et al 2016).…”

Section: Variability In Allee Efectsmentioning

confidence: 99%

Variation in Allee effects: evidence, unknowns, and directions forward

2017

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of variation; and (3) implications for populations, including applications to conservation and management. Future insights are best achieved through robust interactions between theory and empiricism, especially through mechanistic models. Understanding spatiotemporal variation in the demographic processes contributing to the dynamics of small populations is a critical step in the advancement of population ecology.

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“…; Budroni et al . , ; Pisanu et al . ), which are increasingly considered interesting subjects for evolutionary studies (Fernández‐Mazuecos et al .…”

Section: Introductionmentioning

confidence: 99%

“…Both factors conditioned the distribution of many plant species, which are now rare and confined to narrow ranges, often with scattered, isolated and small populations (Thompson 2005). Particular attention has recently been given to the evolution in space and time of population patches of Mediterranean plants (Garc ıa 2003(Garc ıa , 2008Garc ıa et al 2010;Budroni et al 2011Budroni et al , 2014Pisanu et al 2012), which are increasingly considered interesting subjects for evolutionary studies (Fern andez-Mazuecos et al 2014;Mameli et al 2014;Hilpold et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Is population genetic structure of vascular plants shaped more by ecological or geographic factors? A study case on the Mediterranean endemic Centaurea filiformis (Asteraceae)

et al. 2018

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All known populations of the Sardinian endemic Centaurea filiformis Viv. (Asteraceae) were studied in order to understand the impact of both geographic and ecological factors on the genetic structuring of this species. Fourteen populations and 234 individuals were sampled. The demographic structure of the populations and the reproductive ecology were estimated in 28 plots. Population genetic analyses were based on SSR markers. Genetic structure was investigated by spatial Bayesian methods. Average densities of 0.51 individuals m were detected, with a prevalence of adults. Ten species of pollinators were identified; C. filiformis ability to self-pollinate and myrmecochory were demonstrated experimentally. The populations displayed an average heterozygosity value of H = 0.576 and high genetic differentiation (overall F = 0.218). Bayesian analysis suggests that five is the most probable number of gene pools of origin. A strong correlation between geographic distances and genetic distances among populations was highlighted. The demographic population structure of C. filiformis is dominated by adults, suggesting that it is a stable-regressive or senile species, investing more in local persistence than colonisation ability. Despite the scattered distribution, the populations studied do not present evidence of genetic erosion. The analysis of genetic differentiation reveals very high differentiation levels among populations, thus indicating that effective barriers exist against gene flow. A general conclusion is that population distribution results in a clear genetic structure for the populations studied, and that geography and not ecology is shaping the present distribution of this species.

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Evidence for age-structured depensation effect in fragmented plant populations: The case of the Mediterranean endemic Anchusa sardoa (Boraginaceae)

Cited by 9 publications

References 62 publications

Assessing vulnerability of listed Mediterranean plants based on population monitoring

Assessing vulnerability of listed Mediterranean plants based on population monitoring

Variation in Allee effects: evidence, unknowns, and directions forward

Is population genetic structure of vascular plants shaped more by ecological or geographic factors? A study case on the Mediterranean endemic Centaurea filiformis (Asteraceae)

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