Intraspecific Divergence Associated with a Biogeographic Barrier and Climatic Models Show Future Threats and Long-Term Decline of a Rainforest Conifer

Mellick, Rohan; Rossetto, Maurizio; Allen, Christopher; Wilson, Peter; Hill, Robert S.; Lowe, Andrew J.

doi:10.2174/1874839201307010001

Cited by 8 publications

(4 citation statements)

References 66 publications

(106 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In any case, the total allelic richness was identified as a more adequate directive than the H E estimate for conservation purposes, and marker types, such as SSRs or DNA sequence-based data, that are highly polymorphic are required for an accurate estimate [82]. A recent study integrating molecular genetic analysis based on four SSR and five sequence loci along with climate modeling [83] forecasted the long-term decline of the late-successional Australian rainforest conifer, Podocarpus elatus, in its southern populations, due to habitat fragmentation (and the decline in N e ), for which conservation strategies are now invoked. Isozyme markers (15 loci) were used to characterize the genetic diversity of Carapa procera, which occurs in low density within a tropical rain forest [15].…”

Section: Forest Tree Population Diversitymentioning

confidence: 99%

Assessment of the Genetic Diversity in Forest Tree Populations Using Molecular Markers

2014

View full text Add to dashboard Cite

Molecular markers have proven to be invaluable tools for assessing plants' genetic resources by improving our understanding with regards to the distribution and the extent of genetic variation within and among species. Recently developed marker technologies allow the uncovering of the extent of the genetic variation in an unprecedented way through increased coverage of the genome. Markers have diverse applications in plant sciences, but certain marker types, due to their inherent characteristics, have also shown their limitations. A combination of diverse marker types is usually recommended to provide an accurate assessment of the extent of intra-and inter-population genetic diversity of naturally distributed plant species on which proper conservation directives for species that are at risk of decline can be issued. Here, specifically, natural populations of forest trees are reviewed by summarizing published reports in terms of the status of genetic variation in the pure species. In general, for outbred forest tree species, the genetic diversity within populations is larger than among populations of the same species, indicative of a negligible local spatial structure. Additionally, as is the case for plants in general, the diversity at the phenotypic level is also much larger than at the marker level, as selectively neutral markers are commonly used to capture the extent of genetic variation. However, more and more, nucleotide diversity within candidate genes underlying adaptive traits are studied for signatures of selection at single sites. This adaptive genetic diversity constitutes important potential for future forest management and conservation purposes.

show abstract

Section: Forest Tree Population Diversitymentioning

confidence: 99%

Assessment of the Genetic Diversity in Forest Tree Populations Using Molecular Markers

2014

View full text Add to dashboard Cite

show abstract

“…85 Much higher overall nucleotide diversity levels in a conifer were uncovered for P. taeda (π=0.00398). 86 Among the studied poplars, interestingly, the European species, P. tremula, showed the highest nucleotide diversity (π=0.007 or even π=0.0111, 87,88 dependent on the surveyed genes), but differences in diversity were also consistent with its different and complex demographic history. However, nucleotide diversity is best interpreted on a gene-by-gene basis, as population history and selection affect these mutation rates more specifically.…”

Section: Diversity Of Forest Tree Populationmentioning

confidence: 82%

Untitled

2018

FREIJ

View full text Add to dashboard Cite

Information of the genetic diversity of the threatened tree species in any region of the world may contribute to the creation of effective strategies for their preservation and future use. Nowadays, molecular markers have proven to be invaluable tools for assessing genetic resources of tree plants by improving understanding of the users with regards to the distribution and the extent of genetic variation within and among species. Recently developed marker technologies allow the uncovering of the extent of the genetic variation in an unprecedented way through increased coverage of the genome. Markers have diverse applications in plant sciences, but certain marker types, due to their inherent characteristics, have also shown their limitations. A combination of diverse marker types is usually recommended to provide an accurate assessment of the extent of intra-and inter-population genetic diversity of naturally distributed plant species on which proper conservation directives for species that are at risk of decline can be issued. Here, specifically, natural populations of forest trees are reviewed by summarizing published reports in terms of the status of genetic variation in the pure species. In general, for out bred forest tree species, the genetic diversity within populations is larger than among populations of the same species, indicative of a negligible local spatial structure. Additionally, as is the case for plants in general, the diversity at the phenotypic level is also much larger than at the marker level, as selectively neutral markers are commonly used to capture the extent of genetic variation. However, more and more, nucleotide diversity within candidate genes underlying adaptive traits are studied for signatures of selection at single sites. This adaptive genetic diversity constitutes important potential for future forest management and conservation purposes.

show abstract

“…In relation to other Podocarpus species that have been analysed under future change scenarios and genetic characteristics, the work of Mellick et al . [66] on Podocarpus elatus (east coast of Australia) also shows evidence of a change in range, where northern populations would move further north and south, and southern populations would be reduced in size and confined to a small portion of the south coast. Therefore, Podocarpus species are susceptible to climate change and at least in the past, have been able to trace their optimum.…”

Section: Discussionmentioning

confidence: 99%

Niche squeeze induced by climate change of the cold-tolerant subtropical montane Podocarpus parlatorei

2018

View full text Add to dashboard Cite

Under changing climates, the persistence of montane subtropical taxa may be threatened as suitable habitats decrease with elevation. We developed future environmental niche models (ENNMs) for Podocarpus parlatorei, the only conifer from southern Yungas in South America, and projected it onto two greenhouse gas concentration scenarios based on 13 global climate models for the years 2050 and 2070. Modelling identified that P. parlatorei is sensitive and restricted to a relatively narrow range of both warm season temperature and precipitation. By the mid-late twenty-first century areas of high suitability for P. parlatorei will not migrate but overall suitability will become substantially reduced across its whole range and surrounding areas. Despite extensive areas in high mountain ranges where the species may encounter thermally optimal conditions to potentially allow upward local migration, these same areas will likely become strongly aridified under future conditions. On the other hand, in lowland locations where rainfall levels will not change substantially (e.g. northern range), excessive warming will likely generate abiotic and biotic restrictions (e.g. competition with lowland species) for this cold-tolerant species. Urgent measures should be developed for the local long-term preservation of the gene pool of the unique conifer that characterizes Yungas forests for reasons of biodiversity conservation and ecosystem services.

show abstract

Intraspecific Divergence Associated with a Biogeographic Barrier and Climatic Models Show Future Threats and Long-Term Decline of a Rainforest Conifer

Cited by 8 publications

References 66 publications

Assessment of the Genetic Diversity in Forest Tree Populations Using Molecular Markers

Assessment of the Genetic Diversity in Forest Tree Populations Using Molecular Markers

Untitled

Niche squeeze induced by climate change of the cold-tolerant subtropical montane Podocarpus parlatorei

Contact Info

Product

Resources

About