Data from: Climate change is associated with increased allocation to potential outcrossing in a common mixed mating speciesMatthew Austin, Piper Cole, Kenneth Olsen & Adam Smith
Premise: The balance between cross- and self-fertilization is driven by the environment. Yet no long-term study has documented whether anthropogenic climate change is affecting reproductive strategy allocation in species with mixed mating systems. Here, we test whether the common blue violet (Viola sororia; Violaceae) has altered relative allocation to the production of potentially outcrossing flowers as the climate has changed across the 20th century. Methods: Using herbarium records spanning 1875 to 2015 from the central...
Premise The woody plant group Memecylon (Melastomataceae) is a large clade occupying diverse forest habitats in the Old World tropics and exhibiting high regional endemism. Its phylogenetic relationships have been previously studied using ribosomal DNA with extensive sampling from Africa and Madagascar. However, divergence times, biogeography, and character evolution of Memecylon remain uninvestigated. We present a phylogenomic analysis of Memecylon to provide a broad evolutionary perspective of this clade. Methods One hundred supercontigs of 67...
Phylogenetic study of the New Caledonian endemic genus Adenodaphne (Lauraceae) confirms its synonymy with LitseaJérôme Munzinger, Gordon McPherson, Stacey Meyer & Chrissen Gemmill
The genus Adenodaphne is currently considered endemic to New Caledonia, but its distinction from Litsea is questionable based on morphological similarity. An earlier phylogenetic analysis (ITS) including one species of Adenodaphne and two Asian species of Litsea did support their close relationship but did not permit resolution of their generic boundary. We sampled the four species of Adenodaphne currently recognized (11 accessions) and 11 of the 13 endemic species of Litsea currently recognized, plus one...
Diversification of the orchid genus Tridactyle: origin of endemism on the oceanic islands of São Tomé & Príncipe in the Gulf of GuineaTania D'haijere, Esra Kaymak, Arthur Boom, Olivier Hardy, Tariq Stévart & Patrick Mardulyn
Aim: Oceanic islands have played an important role in our understanding of the diversification of organisms, and phylogenetic estimates have been used in this context to investigate the origin of island diversity and its relationship to the continent. Using a typical orchid genus rich in island endemics and with widespread continental relatives, we aim to compare alternative hypotheses of diversification with a focus on island endemism. Location: Tropical Africa and the Gulf of Guinea Islands...
Taxonomic studies on Malagasy Dalbergia (Fabaceae). III. Two new species from Southeastern Madagascar and an emended description of the rosewood species D. maritimaSimon Crameri, Peter B. Phillipson, Nivohenintsoa Rakotonirina, Nicholas Wilding, Roger Lala Andriamiarisoa, & Alex Widmer
The Malagasy rosewood species Dalbergia maritima has a long history of unsustainable exploitation for its beautiful, burgundy-colored heartwood. As currently circumscribed, D. maritima has a wide geographic distribution in eastern Madagascar and exhibits significant morphological, ecological, and genetic variation, suggesting it may comprise more than a single entity. Multivariate analyses of leaf, flower, and inflorescence characters as well as eco-geographic features reveal several morphologically well delimited entities with distinct habitat preferences and/or geographic ranges, which...
Ex situ origins and dispersal of taxa have played important roles in the assembly of island-like biodiversity hotspots. Insular limestone karsts in Southeast Asia are hotspots of biodiversity and endemism, but the immigration processes of their unique floras are still poorly known. Here, we used Gesneriaceae as a proxy to investigate immigration dynamics of tropical and subtropical Southeast Asian karst floras. We show that immigration into subtropical Southeast Asian karst floras first occurred in the...
Interspecific hybridization and island colonization history, not rarity, most strongly affect the genetic diversity in a clade of Mascarene-endemic treesAlexander Linan, Christine Edwards, George Schatz, Porter Lowry, Allison Miller & Jean Claude Sevathian
Many factors shape the genetic diversity of island-endemic trees, with important implications for conservation. Oceanic island-endemic lineages undergo an initial founding bottleneck during the colonization process and subsequently accumulate diversity following colonization. Moreover, many island endemics occur in small populations and are further threatened by anthropogenic factors that cause population declines, making them susceptible to losses in genetic diversity through genetic drift, inbreeding, and bottlenecks. However, life-history traits commonly found in trees, such as outcrossing...
Missouri Botanical Garden7
Guangxi Institute of Botany1
University of Waikato1
New College of Florida1
Institut de Systématique, Évolution, Biodiversité1
Saint Louis University1
Indian Institute of Science Education and Research, Thiruvananthapuram1
Université Libre de Bruxelles1
National University of Singapore1
Washington University in St. Louis1