scholarly journals The diversification of Pterocarpus (Leguminosae: Papilionoideae) was influenced by biome-switching and infrequent long-distance dispersal

2021 ◽  
Author(s):  
Rowan J Schley ◽  
Qin Ming ◽  
Mohammad Vatanparast ◽  
Panagotia Malakasi ◽  
Manuel de la Estrella ◽  
...  
Keyword(s):  
Dry Forest ◽  
Distribution Data ◽  
Arid Environments ◽  
Long Distance Dispersal ◽  
Sequencing Data ◽  
Long Distance ◽  
Dispersal Syndromes ◽  
Moist Forest ◽  
Spatio Temporal ◽  
Fruit Dispersal

Aim: Phenotypes which evolved for dispersal over ecological timescales may lead to significant macroevolutionary consequences, such as infrequent long-distance dispersal and diversification in novel environments. We aimed to reconstruct the phylogenetic history of Pterocarpus (Leguminosae/ Fabaceae) to assess whether seed dispersal phenotypes help to explain the current biogeographical patterns of this group. Location: Pantropical. Taxon: The Pterocarpus clade, particularly Pterocarpus (Leguminosae/Fabaceae). Methods: We sequenced ~300 nuclear loci captured using Angiosperms-353, a genomic 'bait set' for flowering plants, from which we generated a time-calibrated phylogenomic tree. To corroborate this, we also generated a time-calibrated phylogenetic tree from data-mined Sanger-sequencing data. We then collated distribution data and fruit dispersal morphology traits to compare trait-dependent and trait-independent biogeographical models, allowing us to assess whether dispersal traits influenced the spatio-temporal evolution of Pterocarpus. Finally, using the results of these model tests, we estimated the ancestral ranges and biomes of Pterocarpus species to better understand their biogeographical history. Results: We recovered well-supported phylogenetic relationships within Pterocarpus, within which there were two subclades - one Neotropical and the other Palaeotropical. Our divergence date estimates suggested that Pterocarpus largely diversified from around 12 Ma, during the Miocene. Trait-dependent biogeographical models were rejected for both range and biome evolution within Pterocarpus, but models parameterising dispersal were supported. Pterocarpus largely diversified in the Neotropics, followed by dispersal and diversification into Africa and Asia, with later dispersal into Australasia/Oceania. The neotropical subclade of Pterocarpus underwent multiple biome switches between moist forest and dry forest, while in palaeotropical Pterocarpus we reconstructed multiple switches between moist forest and grassland. Main conclusions: Overall, our analyses suggest that Pterocarpus underwent infrequent cross-continental dispersal and adaptation to novel biomes. While this was minimally impacted by fruit dispersal syndromes, shifts between moist and arid environments precipitated by long-distance dispersal and environmental change have played an important role in diversification within Pterocarpus since the Miocene.

scholarly journals Long-distance dispersal syndromes matter: diaspore-trait effect on shaping plant distribution across the Canary Islands

Ecography ◽  
2017 ◽  
Vol 41 (5) ◽  
pp. 805-814 ◽  
Author(s):  
Yurena Arjona ◽  
Manuel Nogales ◽  
Ruben Heleno ◽  
Pablo Vargas
Keyword(s):  
Canary Islands ◽  
Plant Distribution ◽  
Long Distance Dispersal ◽  
Long Distance ◽  
Dispersal Syndromes

scholarly journals Limited long-distance dispersal success in a Western European fairy shrimp evidenced by nuclear and mitochondrial lineage structuring

2019 ◽  
Vol 66 (3) ◽  
pp. 227-237
Author(s):  
Paula C Rodríguez-Flores ◽  
Ernesto Recuero ◽  
Yolanda Jiménez-Ruiz ◽  
Mario García-París
Keyword(s):  
Genetic Diversity ◽  
Gene Flow ◽  
Iberian Peninsula ◽  
Isolation By Distance ◽  
Local Scale ◽  
Long Distance Dispersal ◽  
Evolutionary Potential ◽  
Long Distance ◽  
Widespread Species ◽  
Spatio Temporal

Abstract Anostraca are known by their ability for long-distance dispersal, but the existence in several species of deep, geographically structured mtDNA lineages suggests their populations are subjected to allopatric differentiation, isolation, and prevalence of local scale dispersion. Tanymastix stagnalis is one of the most widespread species of Anostraca and previous studies revealed an unclear geographical pattern of mtDNA genetic diversity. Here, we analyze populations from the Iberian and Italian Peninsulas, Central Europe, and Scandinavia, with the aim to characterize the patterns of genetic diversity in a spatio-temporal framework using mtDNA and nuclear markers to test gene flow among close populations. For these aims we built a time-calibrated phylogeny and carried out Bayesian phylogeographic analyses using a continuous diffusion model. Our results indicated that T. stagnalis presents a deeply structured genetic diversity, including 7 ancient lineages, some of them even predating the Pleistocene. The Iberian Peninsula harbors high diversity of lineages, with strong isolation and recent absence of gene flow between populations. Dispersal at local scale seems to be the prevailing dispersal mode of T. stagnalis, which exhibits a pattern of isolation-by-distance in the Iberian Peninsula. We remark the vulnerability of most of these lineages, given the limited known geographic distribution of some of them, and the high risk of losing important evolutionary potential for the species.

Dispersal traits in the hyper-arid hot desert of the United Arab Emirates

2018 ◽  
Vol 151 (2) ◽  
pp. 194-208 ◽  
Author(s):  
Hatem A. Shabana ◽  
Teresa Navarro ◽  
Ali El-Keblawy
Keyword(s):  
United Arab Emirates ◽  
Dry Season ◽  
Arid Environments ◽  
Long Distance Dispersal ◽  
Species Dispersal ◽  
Long Distance ◽  
Dispersal Mode ◽  
Dispersal Traits ◽  
Floristic Elements ◽  
Soil Cracks

Background and aims – This study describes the dispersal traits of 302 species in five Afro-Arabian habitats from the hyper-arid hot desert of United Arabian Emirates (UAE).Methods – Diaspore size (diaspora length) was studied in relation to growth forms, dispersal modes, presence of structures for long distance dispersal, APG IV groups, phytogeography and dispersal phenology using ANOVA and Pearson χ2 test-statistical analyses.Results – Small diaspores were predominant (six orders of magnitude from 10-4 to 102). The major diaspores were found in Fabids phylogenetic APG IV group (1.80±0.41 cm) mainly trees and the minor in Commelinids (0.30±0.08 cm). The most dominant dispersal mode was semachory (43.7% of the total and 67.5% of the herbaceous species), followed by anemo-meteochory (28.8%) and barochory (23.8%). Semachores/barochores (67.5%) formed the largest groups from the Fabaceae, Poaceae, Boraginaceae, Brassicaceae and Amaranthaceae families. Savanna trees such as Acacia, Prosopis, Ziziphus sp. and Indigofera sp. produced large diaspores secondarily dispersed by vertebrates. Anemo-meteochoric species with small diaspores were predominantly semi-shrubs such as Haloxylon sp. Graminoids such as Stipa sp. and Stipagrostis sp., without structures for long-distance dispersal had diaspore appendages acted as “active drills” in soil cracks. Dryness (dry season) favours the efficient dispersion by the wind for the small shrub species with haired capsule (e.g. Aerva javanica), winged calyx (e.g. Astragalus squarrosus) or wings (e.g. Tribulus qatarensis). Most of the species studied (64.2%) dispersed in the dry season according to what was found in other arid region from the world. The longer dispersal phenology corresponded to Saharo-Arabian and Sudano-Decanian species which is related to the floristic richness of the study area. Species dispersal throughout the year indicates an important seed resource e.g. barochoric species with fleshy fruits or pods with nutrient structures (e.g. Senna italica and Indigofera sp.).Conclusions – In the hyper-arid hot desert of UAE, the dispersal spectra are close to those recorded in other arid environments but with particularities due to the presence of African floristic elements.

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