Fine-scale spatial genetic structure analysis in two Argentine populations of Prosopis alba (Mimosoideae) with different levels of ecological disturbance

Bessega, Cecilia; Pometti, Carolina Luciana; Ewens, Mauricio; Saidman, Beatriz Ofelia; Vilardi, Juan C.

doi:10.1007/s10342-016-0948-9

Cited by 17 publications

(30 citation statements)

References 51 publications

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“…Indeed, geographic barriers, rainfall, and temperature may influence genetic diversity and population structure (Manel et al, ; Mosca et al, ; Shen, Bo, Xu, & Wu, ). The populations of P. alba situated in Bolivian highlands showed relatively high levels of genetic diversity, comparable to others woody trees species with the same life form (Hamrick, ; Hamrick, Godt, & Sherman‐Broyles, ; Nybom, ) but lower values than other P. alba populations growing at lower altitudes in Argentina (mean H e = 0.45, A r = 3.3 and H e = 0.67, A r = 11.03, respectively) (Bessega et al, ).…”

Section: Discussionsupporting

confidence: 59%

“… Values among Argentinean populations are based on a random same size matrix from data belonging to Bessega et al () based on the same 10 SSR loci. [CI 95% ]. …”

Section: Resultsmentioning

confidence: 99%

“…One of these clusters is represented by the trees collected in the three Bolivian populations, Tahuapalca, Huajchilla, and Mecapaca (Figure ). The remaining two clusters comprise Campo Duran and Fernandez previously studied Argentinean populations respectively (Bessega et al, ), independently of the model used.…”

Section: Resultsmentioning

confidence: 99%

“…Total diversity ( H T ) was partitioned into among populations ( G ST × H T ) and within population ( H S ) using Nei and Chesser () approach. The estimates of genetic differentiation were compared with those from Argentinean reanalyzing the original matrix of Bessega et al, () using only the same loci amplified in the Bolivian populations and randomly sampled individuals to get similar size matrices.…”

Section: Methodsmentioning

confidence: 99%

“…v) What are the population effective sizes? We compared the results obtained in these populations with previous reports on two P. alba Argentinean populations (Campo Duran and Fernandez‐Forres) (Bessega, Pometti, Ewens, Saidman, & Vilardi, ) situated at much lower altitudes (150–450 m.a.s.l) with different levels of disturbance produced by agricultural activities.…”

Section: Introductionmentioning

confidence: 93%

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Genetic diversity and differentiation among Prosopis alba (Leguminosae) populations from dry valleys of Bolivia with different levels of human disturbance and altitude

Bessega

Pometti

López

et al. 2018

Ecology and Evolution

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The fast expansion of human population around La Paz, Bolivia (3,200–4,100 m.a.s.l.) triggered new suburban settlements in nearby areas in valleys and mountain feet. The white mesquite, Prosopis alba Griseb. (Leguminosae), is a resource (originally used by native communities) that is strongly affected by changes in land use. A gradient in the level of disturbance is found moving away from the La Paz city toward less altitude areas. The main objective of this study was to characterize genetically three P. alba populations with different levels of human disturbance located at different altitudes in Bolivia, in order to provide some guidelines for management and conservation of these species. Based on 10 SSR loci, the populations showed high level of genetic diversity in comparison with other forest species. The population less disturbed and situated at the lowest altitude was the most variable (H e = 0.51–0.42), whereas the less variable was the most disturbed and situated at the highest altitude. Heterozygote excess was observed in all populations. Most of genetic diversity (99%) is contained within populations. Genetic differentiation among populations is low (1%), suggesting low gene flow among populations. No evidence of recent bottlenecks events was detected. The estimates of the effective population size were low in all populations. The results are in agreement with the hypothesis that genetic diversity is reduced by the impact of anthropic disturbance in the population located at higher altitude in comparison with the lightly disturbed situated at lower altitude and farther from urban settlements.

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Section: Discussionsupporting

confidence: 59%

“… Values among Argentinean populations are based on a random same size matrix from data belonging to Bessega et al () based on the same 10 SSR loci. [CI 95% ]. …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

See 3 more Smart Citations

Genetic diversity and differentiation among Prosopis alba (Leguminosae) populations from dry valleys of Bolivia with different levels of human disturbance and altitude

Bessega

Pometti

López

et al. 2018

Ecology and Evolution

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Genetic studies of various Prosopis species (Leguminosae, Section Algarobia) co‐occurring in oases of the Atacama Desert (northern Chile)

Bessega

Pometti

Fortunato

et al. 2021

Ecology and Evolution

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In the Atacama Desert from northern Chile (19–24°S), Prosopis (Leguminosae) individuals are restricted to oases that are unevenly distributed and isolated from each other by large stretches of barren landscape constituting an interesting study model as the degree of connectivity between natural populations depends on their dispersal capacity and the barriers imposed by the landscape. Our goal was to assess the genetic diversity and the degree of differentiation among groups of Prosopis individuals of different species from Section Algarobia and putative hybrids (hereafter populations) co‐occurring in these isolated oases from the Atacama Desert and determine whether genetic patterns are associated with dispersal barriers. Thirteen populations were sampled from oases located on three hydrographic basins (Pampa del Tamarugal, Rio Loa, and Salar de Atacama; northern, central, and southern basins, respectively). Individuals genotyped by eight SSRs show high levels of genetic diversity (HO = 0.61, Ar = 3.5) and low but significant genetic differentiation among populations (FST = 0.128, FST‐ENA = 0.129, DJOST = 0.238). The AMOVA indicates that most of the variation occurs within individuals (79%) and from the variance among individuals (21%); almost, the same variation can be found between basins and between populations within basins. Differentiation and structure results were not associated with the basins, retrieving up to four genetic clusters and certain admixture in the central populations. Pairwise differentiation comparisons among populations showed inconsistencies considering their distribution throughout the basins. Genetic and geographic distances were significantly correlated at global and within the basins considered (p < .02), but low correlation indices were obtained (r < .37). These results are discussed in relation to the fragmented landscape, considering both natural and non‐natural (humans) dispersal agents that may be moving Prosopis in the Atacama Desert.

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Genetic threats to the Forest Giants of the Amazon: Habitat degradation effects on the socio‐economically important Brazil nut tree (Bertholletia excelsa)

Chiriboga‐Arroyo

Jansen

Lozano

et al. 2020

Plants People Planet

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The Brazil nut is a highly valuable non‐timber forest product from a wild, hyperdominant, emergent tree species that is increasingly vulnerable and exposed to habitat degradation. We provide evidence for how Brazil nut genetic resources are negatively affected by forest degradation and discuss the consequences of this for reproductive success. To avoid negative effects of genetic erosion and inbreeding, we discuss the need to cease large‐scale forest conversion and to promote landscape connectivity. This could support gene flow, maintain genetic diversity across individuals reproducing in clustered patterns, and contribute to securing the long‐termed reproductive viability and resilience of this high socio‐economically and ecologically valuable species.

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Fine-scale spatial genetic structure analysis in two Argentine populations of Prosopis alba (Mimosoideae) with different levels of ecological disturbance

Cited by 17 publications

References 51 publications

Genetic diversity and differentiation among Prosopis alba (Leguminosae) populations from dry valleys of Bolivia with different levels of human disturbance and altitude

Genetic diversity and differentiation among Prosopis alba (Leguminosae) populations from dry valleys of Bolivia with different levels of human disturbance and altitude

Genetic studies of various Prosopis species (Leguminosae, Section Algarobia) co‐occurring in oases of the Atacama Desert (northern Chile)

Genetic threats to the Forest Giants of the Amazon: Habitat degradation effects on the socio‐economically important Brazil nut tree (Bertholletia excelsa)

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