When does habitat fragmentation lead to changes in populations gene pool of pedunculate oak (Quercus robur L.)?

Деген, Бернд; Yanbaev, Yulai; Ianbaev, Ruslan; Bakhtina, Svetlana; Sultanova, Rida

doi:10.1016/j.foreco.2021.119617

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…However, the low levels of genetic differentiation we found in this area of ∼50,000 km 2 (450 km between MER and FAG, the most distant populations sampled in the Po Valley) were in line with several other studies reporting low to moderate levels of genetic differentiation at the regional scale (e.g. G ST = 0.003 in Burger et al 2021; F ST = 0.031 in Belletti et al 2005; F ST = 0.032 in Kesić et al 2021; F ST = 0.051 in Ballian et al 2010; F ST = 0.054 in Degen et al 2021). Q. robur is indeed a wind-pollinated tree, with a high potential for long-distance dispersal and extensive gene flow.…”

Section: Discussionsupporting

confidence: 91%

“…It has a wide distribution, ranging from the Iberian, Italian and Balkan peninsulas to Scandinavia and from Scotland to the Ural and Caucasus mountains (Eaton et al 2016). Although Q. robur appears to be characterised by a continuous range according to the available distribution maps (Caudullo et al 2017), the species suffers from a high degree of fragmentation, as lowland forests have been increasingly replaced by agroforestry and urban landscapes in large parts of the species distribution over the centuries (Petit et al 2002c;Vakkari et al 2006;Agnoletti et al 2018;Degen et al 2021). In recent decades, fragmentation has been exacerbated by episodes of decline and mortality, which have been fuelled by a complex interplay of changing biotic and abiotic conditions (Gibbs 1997;Ragazzi et al 2000;Thomas et al 2002;de Sampaio e Paiva Camilo-Alves et al 2013;Stojanović et al 2015;Gathercole et al 2021).…”

Section: Introductionmentioning

confidence: 99%

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The latitudinal trend in genetic diversity and distinctiveness ofQuercus roburrear edge forest remnants calls for new conservation priorities

Avanzi,

Bagnoli,

Romiti

et al. 2023

Preprint

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Knowledge of the spatial distribution of intraspecific genetic variation is essential for conserving biodiversity, designing rational networks of protected areas, and informing translocation strategies. Although the Italian peninsula likely harbours unique genetic variation as a legacy of Quaternary migrations towards southern Europe, few genetic data are available for many Italian forest tree species and populations.Here, we present the first, comprehensive characterisation of the nuclear genetic variation of Italian populations of pedunculate oak (Quercus roburL.), an iconic broadleaved species of lowland forests. A total of 745 individuals from 25 populations were sampled across the local range of the species and genotyped with 16 microsatellite markers. The genetic layout ofQ. roburpopulations was assessed through various metrics of diversity and distinctiveness, as well as by Bayesian clustering and multivariate methods. Based on the inferred genetic structure, the demographic history ofQ. roburgene pools was evaluated through Approximate Bayesian Computation (ABC) analysis.We found a clear spatial trend in the estimates of genetic diversity and distinctiveness of ItalianQ. roburpopulations. The genetic distinctiveness and private allelic richness values showed a linear decline with increasing latitude, while allelic richness reached its peak in central Italy. We also observed a south-to-north trend in the complexity of genetic structure, with peninsular Italy being characterised by a mosaic of gene pools, in contrast to the homogeneity exhibited by northern Italian populations. Demographic inference indicated that the southern gene pool has had separate dynamics for the last 135,000 years and, therefore, populations in central Italy did not originate from a northward migration route after the Last Glacial Maximum (LGM). Therefore, they were not only a ‘melting pot’ of multiple recolonization routes, but most likely a mosaic of small refugia where pedunculate oak persisted during the LGM.Our results shed new light on conservation priorities for highly fragmentedQ. roburpopulations, and call for consideration of whether treating the southern and central Italian populations as independent conservation units, or intervening to increase their genetic connectivity, is the best strategy for their long-term conservation.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

The latitudinal trend in genetic diversity and distinctiveness ofQuercus roburrear edge forest remnants calls for new conservation priorities

Avanzi,

Bagnoli,

Romiti

et al. 2023

Preprint

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“…Hu et al suggested that this might be mainly due to the constrained ecological adaptability that plants with small distribution areas usually have [52]. Habitat fragmentation is one of the primary threats to plant populations [53,54] as it reduces local population size and gene flow from other populations, thereby decreasing outcrossing rates, genetic variation, and adaptation to future climates [52,55]. Little is known about the extent to which habitat fragmentation affects the reproductive success and population viability of C. luteoflora and further experiments and explorations are needed.…”

Section: Discussionmentioning

confidence: 99%

Predicting Habitat Suitability and Adaptation Strategies of an Endangered Endemic Species, Camellia luteoflora Li ex Chang (Ericales: Theaceae) under Future Climate Change

Rong,

Luo,

et al. 2023

Forests

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Camellia luteoflora Li ex Chang is an endangered plant endemic to the East Asian flora with high ornamental value as well as phylogenetic and floristic research value. Predicting the impact of climate change on its distribution and suitable habitat is crucial until scientific conservation measures are implemented. Based on seven environmental variables and 17 occurrence records, this study optimized the MaxEnt model using the kuenm data package to obtain the optimal parameter combinations (RM = 1.3, FC = LPT) and predicted the potential distribution pattern of C. luteoflora in various future periods. The results revealed that the mean diurnal range, temperature annual range, and precipitation of the wettest month were the influential factors determining the distribution pattern of C. luteoflora, contributing 60.2%, 14.4%, and 12.3% of the variability in the data, respectively. Under the current conditions, the area of suitable habitats for C. luteoflora was only about 21.9 × 104 km2. Overall, the suitable area around the C. luteoflora distribution points will shrink in a circular pattern in response to future global warming, but some potentially suitable distribution areas will expand and migrate to higher latitudes and the Hengduan Mountains region, representing a survival strategy for coping with climate change. It is hypothesized that the future climate refugia will be the highly suitable area and the Hengduan Mountains region. Furthermore, a retrospective validation method was employed to assess the reliability of the predictions and estimate the model’s predictive performance in the future. This study proposes a survival strategy and adaptation measures for C. luteoflora in response to climate change, and the proposed measures can be generalized for application in conservation planning and restoration processes. We also recommend that future studies incorporate factors such as the anthropogenic disturbances and associated socio-economic activities related to C. luteoflora into the model and to further predict the distribution pattern for C. luteoflora in response to historical climatic changes, tracing the evolutionary history of its population.

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Genetic diversity and population structure of Tunisian wild Kermes oak (Quercus coccifera L.): Assessment by ISSR molecular markers and implication for conservation

et al. 2022

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When does habitat fragmentation lead to changes in populations gene pool of pedunculate oak (Quercus robur L.)?

Cited by 5 publications

References 30 publications

The latitudinal trend in genetic diversity and distinctiveness ofQuercus roburrear edge forest remnants calls for new conservation priorities

The latitudinal trend in genetic diversity and distinctiveness ofQuercus roburrear edge forest remnants calls for new conservation priorities

Predicting Habitat Suitability and Adaptation Strategies of an Endangered Endemic Species, Camellia luteoflora Li ex Chang (Ericales: Theaceae) under Future Climate Change

Genetic diversity and population structure of Tunisian wild Kermes oak (Quercus coccifera L.): Assessment by ISSR molecular markers and implication for conservation

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