Understanding the Geographic Patterns of Closely-Related Species of <i>Paspalum</i> (Poaceae) Using Distribution Modelling and Seed Germination Traits
The sexual species of the Dilatata complex (<i>Paspalum dasypleurum</i>, <i>P. flavescens</i>, <i>P. plurinerve</i>, <i>P. vacarianum,</i> and <i>P. urvillei</i>) are closely related phylogenetically and show allopatric distributions, excep...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/12/6/1342 |
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| author | Nicolás Glison David Romero Virginia Rosso José Carlos Guerrero Pablo Rafael Speranza |
| author_facet | Nicolás Glison David Romero Virginia Rosso José Carlos Guerrero Pablo Rafael Speranza |
| author_sort | Nicolás Glison |
| collection | DOAJ |
| description | The sexual species of the Dilatata complex (<i>Paspalum dasypleurum</i>, <i>P. flavescens</i>, <i>P. plurinerve</i>, <i>P. vacarianum,</i> and <i>P. urvillei</i>) are closely related phylogenetically and show allopatric distributions, except <i>P. urvillei</i>. These species show microhabitat similarities and differences in germination traits. We integrated species distribution models (SDMs) and seed germination assays to determine whether germination divergences explain their biogeographic pattern. We trained SDMs in South America using species’ presence–absence data and environmental variables. Additionally, populations sampled from highly favourable areas in the SDMs of these species were grown together, and their seeds germinated at different temperatures and dormancy-breaking conditions. Differences among species in seed dormancy and germination niche breadth were tested, and linear regressions between seed dormancy and climatic variables were explored. SDMs correctly classified both the observed presences and absences. Spatial factors and anthropogenic activities were the main factors explaining these distributions. Both SDMs and germination analyses confirmed that the niche of <i>P. urvillei</i> was broader than the other species which showed restricted distributions, narrower germination niches, and high correlations between seed dormancy and precipitation regimes. Both approaches provided evidence about the generalist-specialist status of each species. Divergences in seed dormancy between the specialist species could explain these allopatric distributions. |
| first_indexed | 2024-03-11T06:00:19Z |
| format | Article |
| id | doaj.art-7ea985d0a137437aab4d9ae69081f4af |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-11T06:00:19Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-7ea985d0a137437aab4d9ae69081f4af2023-11-17T13:22:35ZengMDPI AGPlants2223-77472023-03-01126134210.3390/plants12061342Understanding the Geographic Patterns of Closely-Related Species of <i>Paspalum</i> (Poaceae) Using Distribution Modelling and Seed Germination TraitsNicolás Glison0David Romero1Virginia Rosso2José Carlos Guerrero3Pablo Rafael Speranza4Departamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Avenida Eugenio Garzón 780, Montevideo 12900, UruguayLaboratorio de Desarrollo Sustentable y Gestión Ambiental del Territorio, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, UruguayCátedra de Botánica Sistemática, Facultad de Agronomía, Universidad de Buenos Aires, Avenida San Martín 4453, Buenos Aires C1417DSE, ArgentinaLaboratorio de Desarrollo Sustentable y Gestión Ambiental del Territorio, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo 11400, UruguayDepartamento de Biología Vegetal, Facultad de Agronomía, Universidad de la República, Avenida Eugenio Garzón 780, Montevideo 12900, UruguayThe sexual species of the Dilatata complex (<i>Paspalum dasypleurum</i>, <i>P. flavescens</i>, <i>P. plurinerve</i>, <i>P. vacarianum,</i> and <i>P. urvillei</i>) are closely related phylogenetically and show allopatric distributions, except <i>P. urvillei</i>. These species show microhabitat similarities and differences in germination traits. We integrated species distribution models (SDMs) and seed germination assays to determine whether germination divergences explain their biogeographic pattern. We trained SDMs in South America using species’ presence–absence data and environmental variables. Additionally, populations sampled from highly favourable areas in the SDMs of these species were grown together, and their seeds germinated at different temperatures and dormancy-breaking conditions. Differences among species in seed dormancy and germination niche breadth were tested, and linear regressions between seed dormancy and climatic variables were explored. SDMs correctly classified both the observed presences and absences. Spatial factors and anthropogenic activities were the main factors explaining these distributions. Both SDMs and germination analyses confirmed that the niche of <i>P. urvillei</i> was broader than the other species which showed restricted distributions, narrower germination niches, and high correlations between seed dormancy and precipitation regimes. Both approaches provided evidence about the generalist-specialist status of each species. Divergences in seed dormancy between the specialist species could explain these allopatric distributions.https://www.mdpi.com/2223-7747/12/6/1342favourability functionlocal adaptationnative grassesregeneration traitsseed dormancyspecialist species |
| spellingShingle | Nicolás Glison David Romero Virginia Rosso José Carlos Guerrero Pablo Rafael Speranza Understanding the Geographic Patterns of Closely-Related Species of <i>Paspalum</i> (Poaceae) Using Distribution Modelling and Seed Germination Traits Plants favourability function local adaptation native grasses regeneration traits seed dormancy specialist species |
| title | Understanding the Geographic Patterns of Closely-Related Species of <i>Paspalum</i> (Poaceae) Using Distribution Modelling and Seed Germination Traits |
| title_full | Understanding the Geographic Patterns of Closely-Related Species of <i>Paspalum</i> (Poaceae) Using Distribution Modelling and Seed Germination Traits |
| title_fullStr | Understanding the Geographic Patterns of Closely-Related Species of <i>Paspalum</i> (Poaceae) Using Distribution Modelling and Seed Germination Traits |
| title_full_unstemmed | Understanding the Geographic Patterns of Closely-Related Species of <i>Paspalum</i> (Poaceae) Using Distribution Modelling and Seed Germination Traits |
| title_short | Understanding the Geographic Patterns of Closely-Related Species of <i>Paspalum</i> (Poaceae) Using Distribution Modelling and Seed Germination Traits |
| title_sort | understanding the geographic patterns of closely related species of i paspalum i poaceae using distribution modelling and seed germination traits |
| topic | favourability function local adaptation native grasses regeneration traits seed dormancy specialist species |
| url | https://www.mdpi.com/2223-7747/12/6/1342 |
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