Low plant density enhances gene dispersal in the Amazonian understory herb Heliconia acuminata
In theory, conservation genetics predicts that forest fragmentation will reduce gene dispersal, but in practice, genetic and ecological processes are also dependent on other population characteristics. We used Bayesian genetic analyses to characterize parentage and propagule dispersal in Heliconia a...
| Autor principal: | Côrtes, Marina Corrêa |
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| Outros Autores: | Uríarte, Ma?ia, Lemes, Maristerra R., Gribel, Rogério, Kress, W. John, Smouse, Peter E., Bruna, Emilio M. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Molecular Ecology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17801 |
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oai:repositorio:1-17801 |
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oai:repositorio:1-17801 Low plant density enhances gene dispersal in the Amazonian understory herb Heliconia acuminata Côrtes, Marina Corrêa Uríarte, Ma?ia Lemes, Maristerra R. Gribel, Rogério Kress, W. John Smouse, Peter E. Bruna, Emilio M. Aves Heliconia Acuminata Heliconiaceae Microsatellite Dna Dna, Plant Bayes Theorem Biological Model Brasil Gene Flow Genetic Variability Genetics Genotype Heliconiaceae Population Density Genetics, Population Seed Dispersal Bayes Theorem Brasil Dna, Plant Gene Flow Genetic Variation Genetics, Population Genotype Heliconiaceae Microsatellite Repeats Models, Genetic Population Density Seed Dispersal In theory, conservation genetics predicts that forest fragmentation will reduce gene dispersal, but in practice, genetic and ecological processes are also dependent on other population characteristics. We used Bayesian genetic analyses to characterize parentage and propagule dispersal in Heliconia acuminata L. C. Richard (Heliconiaceae), a common Amazonian understory plant that is pollinated and dispersed by birds. We studied these processes in two continuous forest sites and three 1-ha fragments in Brazil's Biological Dynamics of Forest Fragments Project. These sites showed variation in the density of H. acuminata. Ten microsatellite markers were used to genotype flowering adults and seedling recruits and to quantify realized pollen and seed dispersal distances, immigration of propagules from outside populations, and reproductive dominance among parents. We tested whether gene dispersal is more dependent on fragmentation or density of reproductive plants. Low plant densities were associated with elevated immigration rates and greater propagule dispersal distances. Reproductive dominance among inside-plot parents was higher for low-density than for high-density populations. Elevated local flower and fruit availability is probably leading to spatially more proximal bird foraging and propagule dispersal in areas with high density of reproductive plants. Nevertheless, genetic diversity, inbreeding coefficients and fine-scale spatial genetic structure were similar across populations, despite differences in gene dispersal. This result may indicate that the opposing processes of longer dispersal events in low-density populations vs. higher diversity of contributing parents in high-density populations balance the resulting genetic outcomes and prevent genetic erosion in small populations and fragments. © 2013 John Wiley & Sons Ltd. 2020-06-15T21:49:22Z 2020-06-15T21:49:22Z 2013 Artigo https://repositorio.inpa.gov.br/handle/1/17801 10.1111/mec.12495 en Volume 22, Número 22, Pags. 5716-5729 Restrito Molecular Ecology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Aves Heliconia Acuminata Heliconiaceae Microsatellite Dna Dna, Plant Bayes Theorem Biological Model Brasil Gene Flow Genetic Variability Genetics Genotype Heliconiaceae Population Density Genetics, Population Seed Dispersal Bayes Theorem Brasil Dna, Plant Gene Flow Genetic Variation Genetics, Population Genotype Heliconiaceae Microsatellite Repeats Models, Genetic Population Density Seed Dispersal |
| spellingShingle |
Aves Heliconia Acuminata Heliconiaceae Microsatellite Dna Dna, Plant Bayes Theorem Biological Model Brasil Gene Flow Genetic Variability Genetics Genotype Heliconiaceae Population Density Genetics, Population Seed Dispersal Bayes Theorem Brasil Dna, Plant Gene Flow Genetic Variation Genetics, Population Genotype Heliconiaceae Microsatellite Repeats Models, Genetic Population Density Seed Dispersal Côrtes, Marina Corrêa Low plant density enhances gene dispersal in the Amazonian understory herb Heliconia acuminata |
| topic_facet |
Aves Heliconia Acuminata Heliconiaceae Microsatellite Dna Dna, Plant Bayes Theorem Biological Model Brasil Gene Flow Genetic Variability Genetics Genotype Heliconiaceae Population Density Genetics, Population Seed Dispersal Bayes Theorem Brasil Dna, Plant Gene Flow Genetic Variation Genetics, Population Genotype Heliconiaceae Microsatellite Repeats Models, Genetic Population Density Seed Dispersal |
| description |
In theory, conservation genetics predicts that forest fragmentation will reduce gene dispersal, but in practice, genetic and ecological processes are also dependent on other population characteristics. We used Bayesian genetic analyses to characterize parentage and propagule dispersal in Heliconia acuminata L. C. Richard (Heliconiaceae), a common Amazonian understory plant that is pollinated and dispersed by birds. We studied these processes in two continuous forest sites and three 1-ha fragments in Brazil's Biological Dynamics of Forest Fragments Project. These sites showed variation in the density of H. acuminata. Ten microsatellite markers were used to genotype flowering adults and seedling recruits and to quantify realized pollen and seed dispersal distances, immigration of propagules from outside populations, and reproductive dominance among parents. We tested whether gene dispersal is more dependent on fragmentation or density of reproductive plants. Low plant densities were associated with elevated immigration rates and greater propagule dispersal distances. Reproductive dominance among inside-plot parents was higher for low-density than for high-density populations. Elevated local flower and fruit availability is probably leading to spatially more proximal bird foraging and propagule dispersal in areas with high density of reproductive plants. Nevertheless, genetic diversity, inbreeding coefficients and fine-scale spatial genetic structure were similar across populations, despite differences in gene dispersal. This result may indicate that the opposing processes of longer dispersal events in low-density populations vs. higher diversity of contributing parents in high-density populations balance the resulting genetic outcomes and prevent genetic erosion in small populations and fragments. © 2013 John Wiley & Sons Ltd. |
| format |
Artigo |
| author |
Côrtes, Marina Corrêa |
| author2 |
Uríarte, Ma?ia Lemes, Maristerra R. Gribel, Rogério Kress, W. John Smouse, Peter E. Bruna, Emilio M. |
| author2Str |
Uríarte, Ma?ia Lemes, Maristerra R. Gribel, Rogério Kress, W. John Smouse, Peter E. Bruna, Emilio M. |
| title |
Low plant density enhances gene dispersal in the Amazonian understory herb Heliconia acuminata |
| title_short |
Low plant density enhances gene dispersal in the Amazonian understory herb Heliconia acuminata |
| title_full |
Low plant density enhances gene dispersal in the Amazonian understory herb Heliconia acuminata |
| title_fullStr |
Low plant density enhances gene dispersal in the Amazonian understory herb Heliconia acuminata |
| title_full_unstemmed |
Low plant density enhances gene dispersal in the Amazonian understory herb Heliconia acuminata |
| title_sort |
low plant density enhances gene dispersal in the amazonian understory herb heliconia acuminata |
| publisher |
Molecular Ecology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17801 |
| _version_ |
1787145274445004800 |
| score |
11.755432 |