Climatic Niche Dynamics of the Astereae Lineage and <i>Haplopappus</i> Species Distribution following Amphitropical Long-Distance Dispersal
The tribe Astereae (Asteraceae) displays an American Amphitropical Disjunction. To understand the eco-evolutionary dynamics associated with a long-distance dispersal event and subsequent colonization of extratropical South America, we compared the climatic and geographic distributions of South Ameri...
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MDPI AG
2023-07-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/12/14/2721 |
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| author | Marcelo R. Rosas Ricardo A. Segovia Pablo C. Guerrero |
| author_facet | Marcelo R. Rosas Ricardo A. Segovia Pablo C. Guerrero |
| author_sort | Marcelo R. Rosas |
| collection | DOAJ |
| description | The tribe Astereae (Asteraceae) displays an American Amphitropical Disjunction. To understand the eco-evolutionary dynamics associated with a long-distance dispersal event and subsequent colonization of extratropical South America, we compared the climatic and geographic distributions of South American species with their closest North American relatives, focusing on the diverse South American Astereae genus, <i>Haplopappus</i>. Phylogenetic analysis revealed that two South American genera are closely related to seven North American genera. The climatic niche overlap (D = 0.5) between South and North America exhibits high stability (0.89), low expansion (0.12), and very low unfilling (0.04). The distribution of the North American species predicted the climatic and geographic space occupied by the South American species. In central Chile, <i>Haplopappus</i> showed a non-random latitudinal gradient in species richness, with Mediterranean climate variables mainly explaining the variation. Altitudinal patterns indicated peak richness at 600 m, declining at lower and higher elevations. These findings support climatic niche conservatism in shaping <i>Haplopappus</i> species distribution and diversity. Two major endemism zones were identified in central Chile and the southern region, with a transitional zone between Mediterranean and Temperate macro-bioclimates. Our results indicate strong niche conservatism following long-distance dispersal and slight niche expansion due to unique climatic variables in each hemisphere. |
| first_indexed | 2024-03-11T00:42:49Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-11T00:42:49Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-3ddae51c6c76458fb3e8bfa769a1e85b2023-11-18T21:01:07ZengMDPI AGPlants2223-77472023-07-011214272110.3390/plants12142721Climatic Niche Dynamics of the Astereae Lineage and <i>Haplopappus</i> Species Distribution following Amphitropical Long-Distance DispersalMarcelo R. Rosas0Ricardo A. Segovia1Pablo C. Guerrero2Departamento de Botánica, Facultad de Ciencias Naturales & Oceanográficas, Universidad de Concepción, Casilla 160C, Concepcion 4030000, ChileDepartamento de Botánica, Facultad de Ciencias Naturales & Oceanográficas, Universidad de Concepción, Casilla 160C, Concepcion 4030000, ChileDepartamento de Botánica, Facultad de Ciencias Naturales & Oceanográficas, Universidad de Concepción, Casilla 160C, Concepcion 4030000, ChileThe tribe Astereae (Asteraceae) displays an American Amphitropical Disjunction. To understand the eco-evolutionary dynamics associated with a long-distance dispersal event and subsequent colonization of extratropical South America, we compared the climatic and geographic distributions of South American species with their closest North American relatives, focusing on the diverse South American Astereae genus, <i>Haplopappus</i>. Phylogenetic analysis revealed that two South American genera are closely related to seven North American genera. The climatic niche overlap (D = 0.5) between South and North America exhibits high stability (0.89), low expansion (0.12), and very low unfilling (0.04). The distribution of the North American species predicted the climatic and geographic space occupied by the South American species. In central Chile, <i>Haplopappus</i> showed a non-random latitudinal gradient in species richness, with Mediterranean climate variables mainly explaining the variation. Altitudinal patterns indicated peak richness at 600 m, declining at lower and higher elevations. These findings support climatic niche conservatism in shaping <i>Haplopappus</i> species distribution and diversity. Two major endemism zones were identified in central Chile and the southern region, with a transitional zone between Mediterranean and Temperate macro-bioclimates. Our results indicate strong niche conservatism following long-distance dispersal and slight niche expansion due to unique climatic variables in each hemisphere.https://www.mdpi.com/2223-7747/12/14/2721amphitropical disjunctionAsteraceaebiogeographic patternsChileclimatesMediterranean biome |
| spellingShingle | Marcelo R. Rosas Ricardo A. Segovia Pablo C. Guerrero Climatic Niche Dynamics of the Astereae Lineage and <i>Haplopappus</i> Species Distribution following Amphitropical Long-Distance Dispersal Plants amphitropical disjunction Asteraceae biogeographic patterns Chile climates Mediterranean biome |
| title | Climatic Niche Dynamics of the Astereae Lineage and <i>Haplopappus</i> Species Distribution following Amphitropical Long-Distance Dispersal |
| title_full | Climatic Niche Dynamics of the Astereae Lineage and <i>Haplopappus</i> Species Distribution following Amphitropical Long-Distance Dispersal |
| title_fullStr | Climatic Niche Dynamics of the Astereae Lineage and <i>Haplopappus</i> Species Distribution following Amphitropical Long-Distance Dispersal |
| title_full_unstemmed | Climatic Niche Dynamics of the Astereae Lineage and <i>Haplopappus</i> Species Distribution following Amphitropical Long-Distance Dispersal |
| title_short | Climatic Niche Dynamics of the Astereae Lineage and <i>Haplopappus</i> Species Distribution following Amphitropical Long-Distance Dispersal |
| title_sort | climatic niche dynamics of the astereae lineage and i haplopappus i species distribution following amphitropical long distance dispersal |
| topic | amphitropical disjunction Asteraceae biogeographic patterns Chile climates Mediterranean biome |
| url | https://www.mdpi.com/2223-7747/12/14/2721 |
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