Low impact of present and historical landscape configuration on the genetics of fragmented Anthyllis vulneraria populations

Honnay, Olivier; Coart, Els; Butaye, Jan; Adriaens, Dries; Glabeke, Sabine Van; Roldán‐Ruiz, Isabel

doi:10.1016/j.biocon.2005.09.006

Cited by 94 publications

(87 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A previous study examining current levels of gene flow among the same populations of L. flos-cuculi as studied here revealed that present-day functional connectivity of this species is indeed low (Aavik et al, 2013), and therefore it is likely that genetic differentiation F ST rather represents historical than current functional connectivity in our study landscape. The most dramatic landscape changes in Switzerland took place in the second half of the twentieth century (Schultz and Dosch, 2005), and thus the effects of these changes on the genetic differentiation of perennial plants might only become traceable in the future (Honnay et al, 2006;Klank et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

The structural and functional connectivity of the grassland plant Lychnis flos-cuculi

2013

View full text Add to dashboard Cite

Understanding the relationship between structural and functional connectivity is essential for successful restoration and conservation management, particularly in intensely managed agricultural landscapes. We evaluated the relationship between structural and functional connectivity of the wetland plant Lychnis flos-cuculi in a fragmented agricultural landscape using landscape genetic and network approaches. First, we studied the effect of structural connectivity, such as geographic distance and various landscape elements (forest, agricultural land, settlements and ditch verges), on gene flow among populations as a measurement of functional connectivity. Second, we examined the effect of structural graph-theoretic connectivity measures on gene flow among populations and on genetic diversity within populations of L. flos-cuculi. Among landscape elements, forests hindered gene flow in L. flos-cuculi, whereas gene flow was independent of geographic distance. Among the structural graphtheoretic connectivity variables, only intrapopulation connectivity, which was based on population size, had a significant positive effect on gene flow, that is, more gene flow took place among larger populations. Unexpectedly, interpopulation connectivity of populations, which takes into account the spatial location and distance among populations, did not influence gene flow in L. flos-cuculi. However, higher observed heterozygosity and lower inbreeding was observed in populations characterised by higher structural interpopulation connectivity. This finding shows that a spatially coherent network of populations is significant for maintaining the genetic diversity of populations. Nevertheless, lack of significant relationships between gene flow and most of the structural connectivity measures suggests that structural connectivity does not necessarily correspond to functional connectivity.

show abstract

Section: Discussionmentioning

confidence: 99%

The structural and functional connectivity of the grassland plant Lychnis flos-cuculi

2013

View full text Add to dashboard Cite

show abstract

“…However, empirical studies of small, isolated populations have yielded variable results [9,12]. Cases have been reported in which fragmented populations of some widespread plant species promoted gene flow and were not detrimental [15][16][17]. Several factors responsible for such discrepancy have been proposed such as interspecific longevity differential, pre-fragmentation abundance, different mating system, the presence of seed banks, and interaction of animal population and seed dispersal [12].…”

Section: Introductionmentioning

confidence: 99%

Genetic Risk Assessment of a Threatened Remnant Population of Hairy Prairie-Clover (Dalea villosa var. villosa) in the Canadian Prairie

Peterson

Richards

2011

Diversity

View full text Add to dashboard Cite

Abstract:Hairy prairie-clover [Dalea villosa (Nutt.) Spreng. var. villosa] is a threatened Canadian wildflower. To facilitate the efforts of conserving this threatened plant, amplified fragment length polymorphism (AFLP) technique was applied to assess genetic diversity in a remnant hairy prairie-clover population in the Canadian Prairie. Three AFLP primer pairs were employed to genotype 610 individual plants from the population and 15 plants from a North Dakota composite population, and 100 polymorphic AFLP bands were analyzed. The assayed plants displayed 23% AFLP variation present between the remnant population and the North Dakota composite population, but maintained a high level (91%) of AFLP variation within patches of the remnant population. The individual genetic distinctiveness measured by average AFLP dissimilarity was positively associated with latitude and negatively with elevation. The among-patch AFLP variation was significantly related to inter-patch distance, indicating local genetic differentiation within the remnant population. However, the proportions of within-patch AFLP variation were not associated with any patch characteristics assessed (i.e., patch size, perimeter, nearest neighbor distance, mean inter-patch distance). No fine-scale genetic structure was found within three large patches, suggesting little genetic correlations present for plants five meters apart. Some genetically distinctive and diverse patches were also identified. These findings indicate that the genetic risk of the remnant hairy prairie-clover population in the Canadian Prairie is low. OPEN ACCESSDiversity 2011, 3 376

show abstract

“…In plants, the signature of historical habitat connectivity has been detected in several studies. For example, genetic diversity in Anthyllis vulneraria was more closely related to current fragment area and population size than to historical landscape configuration [33]. For Globularia bisnagarica, historical landscape structure and its influence on gene flow are thought responsible for the genetic similarity of currently fragmented populations [20].…”

Section: Past and Current Landscape Effects On Genetic Variationmentioning

confidence: 99%

“…Other patterns include lower genetic variation in degraded and logged habitats [21], clines in allele frequencies [22,23] discontinuities among geographically-separated portions of the range [18,24] or between organisms separated by landscape barriers [25], higher variation in unglaciated portions of species' ranges [26], higher genetic variation in core versus marginal populations [27][28][29][30], and differences in genetic variation between distinct habitats (prairie versus alvar) [31]. Studies considering the effects of original habitat patch size, current patch size, population area, and areas of nearby suitable habitat within the landscape on local genetic variation are less common but also show positive relationships [32,33]. In general, habitat fragmentation tends to decrease genetic variation of remaining populations [34].…”

Section: Introductionmentioning

confidence: 99%

Genetic Variation in Past and Current Landscapes: Conservation Implications Based on Six Endemic Florida Scrub Plants

Menges

Dolan

Pickert

et al. 2010

International Journal of Ecology

View full text Add to dashboard Cite

If genetic variation is often positively correlated with population sizes and the presence of nearby populations and suitable habitats, landscape proxies could inform conservation decisions without genetic analyses. For six Florida scrub endemic plants (Dicerandra frutescens, Eryngium cuneifolium, Hypericum cumulicola, Liatris ohlingerae, Nolina brittoniana, and Warea carteri), we relate two measures of genetic variation, expected heterozygosity and alleles per polymorphic locus (APL), to population size and landscape variables. Presettlement areas were estimated based on soil preferences and GIS soils maps. Four species showed no genetic patterns related to population or landscape factors. The other two species showed significant but inconsistent patterns. For Liatris ohlingerae, APL was negatively related to population density and weakly, positively related to remaining presettlement habitat within 32 km. For Nolina brittoniana, APL increased with population size. The rather weak effects of population area/size and both past and current landscape structures suggest that genetic variation needs to be directly measured and not inferred for conservation planning.

show abstract

Low impact of present and historical landscape configuration on the genetics of fragmented Anthyllis vulneraria populations

Cited by 94 publications

References 43 publications

The structural and functional connectivity of the grassland plant Lychnis flos-cuculi

The structural and functional connectivity of the grassland plant Lychnis flos-cuculi

Genetic Risk Assessment of a Threatened Remnant Population of Hairy Prairie-Clover (Dalea villosa var. villosa) in the Canadian Prairie

Genetic Variation in Past and Current Landscapes: Conservation Implications Based on Six Endemic Florida Scrub Plants

Contact Info

Product

Resources

About