Phylogeography and species distribution modeling reveal a historic disjunction for the conifer Podocarpus lambertii

Bernardi, Alison Paulo; Lauterjung, Miguel Busarello; Mantovani, Adelar; Reis, Maurício Sedrez dos

doi:10.1007/s11295-020-01434-2

Cited by 3 publications

(6 citation statements)

References 79 publications

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“…Furthermore, it is worth mentioning the recent expansion of Araucaria forests in southern Brazil, which began ca 4000-3000 years before present and intensified around 2000-1000 before present (Behling 1997, Behling et al, 2004. Additionally, populations of P. lambertii also exhibit clear signs of recent expansion (Bernardi et al, 2020). Hence, it is reasonable to presume that the genetic diversity of P. lambertii populations in southern Brazil may have been influenced by founder effects, in addition to the factors previously mentioned.…”

Section: Genetic Diversity and Effective Sizementioning

confidence: 94%

“…Furthermore, a moderate level of genetic divergence (𝐹𝐹 ̂𝑆𝑆𝑆𝑆 = 0.139) associated with the geographic distance between populations was also detected using cloroplastidial markers (Bernardi et al 2020), highlighting the need for conservation measures at local scale. Finally, the extensive harvesting of timber coupled with the rapid transformation of the species' habitat by human activities has led to the classification of this species as "Near Threatened" in the IUCN Red List (Farjon 2013) and "In Danger" in the Official List of Endangered Flora of Santa Catarina State (CONSEMA 2014).…”

Section: Introductionmentioning

confidence: 95%

“…However, few studies have been carried out with P. lambertii in this specific landscape. Podocarpus lambertii naturally occur in forest-grasslands and continuous forest, in two disjoint areas, one in the northern Bahia (11°32.82'S,41°9.16'W) and another between Minas Gerais and southern Rio Grande do Sul (29°27.32'S, 54°26.26'W) (Bernardi et al, 2020). This is a native and dioecious species, endemic to Brazil, pollinated by bees (Carvalho 2004) and by wind (Bernardi et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Genetic diversity and fine-scale genetic structure of the conifer Podocarpus lambertii in a forest-grassland mosaic from Southern Brazil

Bernardi,

Lauterjung,

Montagna

et al. 2024

Silvae Genetica

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Podocarpus lambertii (Podocarpaceae) is an endangered conifer, endemic to Brazil and occurring in continuous forest and forest-grassland landscapes from the Araucaria Forest. Aiming to support conservation efforts for P. lambertii populations and gain insights into the preservation of forest-grassland mosaics in southern Brazil, we assessed the spatial pattern, genetic diversity, and fine-scale genetic structure (FSGS) within a population situated in a forest-grassland mosaic. The study was conducted in a 9-ha plot in forest-grassland mosaic. All P. lambertii individuals with height ≥ 0.1 m were sampled and the population was stratified into four demographic categories (Seedling, Juvenile, Immature, and Reproductive). For each of these categories, we used 13 allozyme markers to evaluate the spatial pattern, genetic diversity and FSGS. All individuals occurred inside the forest-patches, presenting an aggregated pattern of distribution. Low genetic diversity was recorded for all categories and for the population ( H ⌢ E = 0.046 {\mathord{\buildrel{\lower3pt\hbox{$\scriptscriptstyle\frown$}}\over H} _E} = \,0.046 ), as well as a high number of rare alleles (20). Positive and significant FSGS was estimated only for the Juveniles ( θ ⌢ x y = 0.012 {\mathord{\buildrel{\lower3pt\hbox{$\scriptscriptstyle\frown$}}\over \theta } _{xy}} = \,0.012 ) up to maximum distance of 7.1 m, and the minimum viable area for the long-term conservation of Reproductive genetic diversity was approximately 68 ha. The set of our findings suggests that conservation actions need to enhance connectivity among forest-patches to prevent the loss of rare alleles due to genetic drift. Additionally, we highlight the significance of preserving forest-patches as repositories of species diversity and as crucial connectors between populations.

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Section: Genetic Diversity and Effective Sizementioning

confidence: 94%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Genetic diversity and fine-scale genetic structure of the conifer Podocarpus lambertii in a forest-grassland mosaic from Southern Brazil

Bernardi,

Lauterjung,

Montagna

et al. 2024

Silvae Genetica

Self Cite

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“…These seven predictor variables were used to model the species distribution for all the species to allow for comparisons between species and are variables used by other studies predicting the species distribution of podocarps (e.g. Bernardi et al 2020 ; Tesfamariam et al 2022 ).…”

Section: Methodsmentioning

confidence: 99%

“…Here, we used 10 different algorithms available within the biomod2 package ( Thuiller et al 2021 ) in R version 4.1.1 to obtain an ensemble of predicted distributions. An ensemble approach was used because numerous studies have shown that ensemble SDMs improve the predictive performance of SDMs in comparison to using one algorithm ( Grenouillet et al 2011 ; Guo et al 2015 ; Bernardi et al 2020 ; Zurell et al 2020 ). The following algorithms were used to develop the ensemble SDMs: generalized linear model, generalized additive models, generalized boosting model/boosted regression trees (GBM), surface range envelop/BIOCLIM (SRE), classification tree analysis, artificial neural network, flexible discriminant analysis, multiple adaptive regression splines, random forest and maximum entropy.…”

Section: Methodsmentioning

confidence: 99%

Projecting Podocarpaceae response to climate change: we are not out of the woods yet

2023

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Under the changing climate, the persistence of Afrotemperate taxa may be threatened as suitable habitat availability decreases. The unique disjunct ranges of podocarps in southern Africa raise questions about the persistence of these species under climate change. Here, we identified likely environmental drivers of these distributions, characterised the current and future (2070) environmental niches, and projected distributions of four podocarp species in South Africa. Species distribution models were conducted using species locality data for A. falcatus, P. latifolius, P. elongatus and P. henkelii and both historical climate data (1970 – 2000) and future climate scenarios (RCP 4.5 and 8.5, 2061 – 2080) to estimate the current and future distributions. We also used this opportunity to identify the most important climatic variables that likely govern each species’ distribution. Using niche overlap estimates, a similarity test, and indices of niche expansion, stability and unfilling, we explored how niches change under different climate scenarios. The distribution of the study species was governed by max temperature of the warmest month, temperature annual range, mean temperature of the wettest quarter, and precipitation of the wettest, driest, and warmest quarters. The current distribution of A. falcatus was predicted to expand to higher elevations under RCP 4.5 and RCP 8.5. Podocarpus henkelii was predicted to lose most of its suitable habitat under RCP 4.5 and expand under RCP 8.5, however this was the opposite for P. elongatus and P. latifolius. Interestingly, P. elongatus, which had the smallest geographic distribution, showed the most vulnerability to climate change in comparison to the other podocarps. Mapping the distribution of podocarps and understanding the differences in their current and future climate niches provides insight into potential climate drivers of podocarp persistence and the potential for adaptation of these species. Overall, these results suggest that P. elongatus and P. henkelii may expand to novel environmental niches.

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Impacts of Early Pleistocene glacial vicariance among refugial lineages and Mid-Late Pleistocene interglacial dispersal and expansion on forging population genetic structure of the giant clam Tridacna squamosa (Bivalvia: Cardiidae: Tridacninae) across the Red Sea and Indo-West Pacific oceans

Deli

2024

Acta Oceanol. Sin.

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Phylogeography and species distribution modeling reveal a historic disjunction for the conifer Podocarpus lambertii

Cited by 3 publications

References 79 publications

Genetic diversity and fine-scale genetic structure of the conifer Podocarpus lambertii in a forest-grassland mosaic from Southern Brazil

Genetic diversity and fine-scale genetic structure of the conifer Podocarpus lambertii in a forest-grassland mosaic from Southern Brazil

Projecting Podocarpaceae response to climate change: we are not out of the woods yet

Impacts of Early Pleistocene glacial vicariance among refugial lineages and Mid-Late Pleistocene interglacial dispersal and expansion on forging population genetic structure of the giant clam Tridacna squamosa (Bivalvia: Cardiidae: Tridacninae) across the Red Sea and Indo-West Pacific oceans

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