scholarly journals Topography, more than land cover, explains genetic diversity in a Neotropical savanna tree frog

2020 ◽  
Vol 26 (12) ◽  
pp. 1798-1812 ◽  
Author(s):  
Renato C. Nali ◽  
C. Guilherme Becker ◽  
Kelly R. Zamudio ◽  
Cynthia P. A. Prado
Keyword(s):  
Genetic Diversity ◽  
Land Cover ◽  
Tree Frog ◽  
Neotropical Savanna

scholarly journals Agricultural Landscape Heterogeneity Matter: Responses of Neutral Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree

2021 ◽  
Vol 11 ◽  
Author(s):  
Tatiana Souza do Amaral ◽  
Juliana Silveira dos Santos ◽  
Fernanda Fraga Rosa ◽  
Marcelo Bruno Pessôa ◽  
Lázaro José Chaves ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Differentiation ◽  
Habitat Loss ◽  
Additive Genetic Variance ◽  
Time Lag ◽  
Agricultural Landscapes ◽  
Neotropical Savanna ◽  
Evolutionary Potential ◽  
Adaptive Traits ◽  
Neutral Genetic Diversity

Plants are one of the most vulnerable groups to fragmentation and habitat loss, that may affect community richness, abundance, functional traits, and genetic diversity. Here, we address the effects of landscape features on adaptive quantitative traits and evolutionary potential, and on neutral genetic diversity in populations of the Neotropical savanna tree Caryocar brasiliense. We sampled adults and juveniles in 10 savanna remnants within five landscapes. To obtain neutral genetic variation, we genotyped all individuals from each site using nine microsatellite loci. For adaptive traits we measured seed size and mass and grown seeds in nursery in completely randomized experimental design. We obtained mean, additive genetic variance (Va) and coefficient of variation (CVa%), which measures evolvability, for 17 traits in seedlings. We found that landscapes with higher compositional heterogeneity (SHDI) had lower evolutionary potential (CVa%) in leaf length (LL) and lower aboveground dry mass (ADM) genetic differentiation (QST). We also found that landscapes with higher SHDI had higher genetic diversity (He) and allelic richness (AR) in adults, and lower genetic differentiation (FST). In juveniles, SHDI was also positively related to AR. These results are most likely due to longer dispersal distance of pollen in landscapes with lower density of flowering individuals. Agricultural landscapes with low quality mosaic may be more stressful for plant species, due to the lower habitat cover (%), higher cover of monocropping (%) and other land covers, and edge effects. However, in landscapes with higher SHDI with high quality mosaic, forest nearby savanna habitat and the other environments may facilitate the movement or provide additional habitat and resources for seed disperses and pollinators, increasing gene flow and genetic diversity. Finally, despite the very recent agriculture expansion in Central Brazil, we found no time lag in response to habitat loss, because both adults and juveniles were affected by landscape changes.

Land cover disturbance homogenizes aquatic insect functional structure in neotropical savanna streams

2018 ◽  
Vol 84 ◽  
pp. 573-582 ◽  
Author(s):  
Diego M. Parreira de Castro ◽  
Sylvain Dolédec ◽  
Marcos Callisto
Keyword(s):  
Land Cover ◽  
Aquatic Insect ◽  
Functional Structure ◽  
Neotropical Savanna

scholarly journals Genetic Diversity and Fitness in Peripheral and Central Populations of the European Tree Frog Hyla Arborea

Hereditas ◽  
2004 ◽  
Vol 133 (2) ◽  
pp. 115-122 ◽  
Author(s):  
Per Edenhamn ◽  
Mats Höggren ◽  
Allan Carlson
Keyword(s):  
Genetic Diversity ◽  
Tree Frog ◽  
Hyla Arborea

scholarly journals A large historical refugium explains spatial patterns of genetic diversity in a Neotropical savanna tree species

2016 ◽  
Vol 119 (2) ◽  
pp. 239-252 ◽  
Author(s):  
Helena Augusta Viana e Souza ◽  
Rosane Garcia Collevatti ◽  
Matheus S. Lima-Ribeiro ◽  
José Pires de Lemos-Filho ◽  
Maria Bernadete Lovato
Keyword(s):  
Genetic Diversity ◽  
Spatial Patterns ◽  
Tree Species ◽  
Neotropical Savanna

scholarly journals Genetic Diversity of Campomanesia adamantium and Its Correlation with Land Use and Land Cover

Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 160
Author(s):  
Bruno do Amaral Crispim ◽  
Juliana dos Santos Fernandes ◽  
Miklos Maximiliano Bajay ◽  
Maria Imaculada Zucchi ◽  
Carlos Eduardo de Araújo Batista ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Land Use ◽  
Land Cover ◽  
Significant Loss ◽  
Inbreeding Coefficient ◽  
Expected Heterozygosity ◽  
Long Run ◽  
Land Cover Data ◽  
Species Specific ◽  
Pearson Correlations

(1) Background: Campomanesia adamantium is an endemic species of the Cerrado and this biome has been under threat by its constant degradation. The genetic diversity of C. adamantium was characterized using species-specific microsatellites in two different time periods and correlations of these parameters of genetic diversity with the land use and land cover data. (2) Methods: We used 10 microsatellite loci to analyze C. adamantium from five populations, collected in 2011 and 2017. Maps of land use and land cover of the collection sites in both years were generated and subsequently correlated with genetic diversity. (3) Results: No significant loss of genetic diversity was observed in the analyzed period and a positive inbreeding coefficient was observed in all populations. AMOVA and STRUCTURE showed that there is no population structure between years and populations. Significant Pearson correlations were observed in 2017 between parameters of genetic diversity and land use and land cover, with a positive correlation between expected heterozygosity and secondary vegetation, and a negative correlation between inbreeding coefficient and exposed soil. (4) Conclusions: There was no decline in genetic diversity from 2011 to 2017. The high rates of the inbreeding coefficient could lead, for the species, in the long run, to an inbreeding depression as the Cerrado fragmentation might cause a population bottleneck.

scholarly journals Genetic differentiation in two European tree frog (Hyla arborea) metapopulations in contrasted landscapes of western Switzerland

2009 ◽  
Vol 30 (1) ◽  
pp. 127-133 ◽  
Author(s):  
Sylvain Dubey ◽  
Luca Fumagalli ◽  
Sylvain Ursenbacher ◽  
Jérôme Pellet
Keyword(s):  
Genetic Diversity ◽  
Gene Flow ◽  
Genetic Differentiation ◽  
Tree Frog ◽  
Genetic Structuring ◽  
Hyla Arborea ◽  
Heterogeneous Landscape ◽  
Loss Of Genetic Diversity ◽  
Suitable Habitats ◽  
Two Sectors

AbstractThe survival of threatened species as the European tree frog (Hyla arborea) is strongly dependent on the genetic variability within populations, as well as gene flow between them. In Switzerland, only two sectors in its western part still harbour metapopulations. The first is characterised by a very heterogeneous and urbanized landscape, while the second is characterised by a uninterrupted array of suitable habitats. In this study, six microsatellite loci were used to establish levels of genetic differentiation among the populations from the two different locations. The results show that the metapopulations have: (i) weak levels of genetic differentiation (FST within metapopulation ≈ 0.04), (ii) no difference in levels of genetic structuring between them, (iii) significant (p = 0.019) differences in terms of genetic diversity (Hs) and observed heterozygozity (Ho), the metapopulation located in a disturbed landscape showing lower values. Our results suggest that even if the dispersal of H. arborea among contiguous ponds seems to be efficient in areas of heterogeneous landscape, a loss of genetic diversity can occur.

scholarly journals Relationship between Genetic Variability and Land Use and Land Cover in Populations of Campomanesia adamantium (Myrtaceae)

Diversity ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 106 ◽  
Author(s):  
Bruno Crispim ◽  
Miklos Bajay ◽  
Adrielle de Vasconcelos ◽  
Thamiris Deo ◽  
Ramilla Braga ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Land Use ◽  
Genetic Variability ◽  
Land Cover ◽  
Aerial Images ◽  
Endemic Plant ◽  
Medicinal Uses ◽  
Mato Grosso ◽  
Diversity Studies ◽  
The Relationship

Campomanesia adamantium is an endemic plant of Cerrado biome that has potential for cultivation because its fruits have culinary and medicinal uses. However, genetic diversity studies using molecular markers with Cerrado species are scarce, and the inadequate extractive exploitation of fruits and the expansion of agricultural frontiers may also affect genetic variability. Therefore, studies in this field are of interest as they can provide sources for conservation and breeding programs. In this context, we investigated the genetic diversity of native populations of C. adamantium from different sites and the relationship between genetic variability and the land use and land cover of each site. A total of 207 plants were sampled in seven sites and characterized with seven polymorphic microsatellite markers. The use and coverage of land were mapped based on aerial images, and the land was classified into different categories. The genetic diversity was high in all populations, with low levels of differentiation due to allele sharing, mainly in Mato Grosso do Sul and Paraguay populations. The geographically closest populations were more genetically similar. The use and coverage of land indicated that intense agriculture promotes a significant decrease in genetic variability.

scholarly journals Multi-Scale Landscape Influences on Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree

2020 ◽  
Vol 11 ◽  
Author(s):  
Rosane Garcia Collevatti ◽  
Juliana Silveira dos Santos ◽  
Fernanda Fraga Rosa ◽  
Tatiana S. Amaral ◽  
Lazaro José Chaves ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Neotropical Savanna ◽  
Adaptive Traits ◽  
Multi Scale ◽  
Landscape Influences

Climatic changes can drive the loss of genetic diversity in a Neotropical savanna tree species

2017 ◽  
Vol 23 (11) ◽  
pp. 4639-4650 ◽  
Author(s):  
Jacqueline S. Lima ◽  
Liliana Ballesteros-Mejia ◽  
Matheus S. Lima-Ribeiro ◽  
Rosane G. Collevatti
Keyword(s):  
Genetic Diversity ◽  
Tree Species ◽  
Climatic Changes ◽  
Neotropical Savanna ◽  
Loss Of Genetic Diversity
Sign in / Sign up

Export Citation Format

Share Document