The global aquarium trade can introduce alien freshwater invaders, potentially impacting local aquatic ecosystems and their biodiversity. The role of the aquarium trade in spreading freshwater red macroalgae that hitchhike on ornamental aquatic plants and animals is unassessed. We investigated this human-mediated phenomenon via a broad biodiversity survey and genetic analysis of freshwater red algae in the field and aquarium shops in East Asia. Results We found 26 molecular operational taxonomic units (mOTUs) in Taiwan,...
Environmental DNA can act as a biodiversity barometer of anthropogenic pressures in coastal ecosystemsJoseph DiBattista, James Reimer, Michael Stat, Giovanni Masucci, Piera Biondi, Maarten De Brauwer, Shaun Wilkinson, Anthony Chariton & Michael Bunce
Loss of biodiversity from lower to upper trophic levels reduces overall productivity and stability of coastal ecosystems in our oceans, but rarely are these changes documented across both time and space. The characterisation of environmental DNA (eDNA) from sediment and seawater using metabarcoding offers a powerful molecular lens to observe marine biota and provides a series of ‘snapshots’ across a broad spectrum of eukaryotic organisms. Using these next-generation tools and downstream analytical innovations including machine...
• Dispersal is a key ecological process that influences plant community assembly. Therefore, understanding whether dispersal strategies are associated with climate is of utmost importance, particularly in areas greatly exposed to climate change. We examined alpine plant communities located in the mountain summits of the tropical Andes across a 4000 km latitudinal gradient. We investigated species dispersal strategies and tested their association with climatic conditions and their evolutionary history. • We used dispersal-related traits (dispersal...
Predicting speciation is a fundamental goal of research in evolutionary ecology. The probability of speciation is often positively correlated with ecosystem size. Although the mechanisms driving this correlation are generally difficult to identify, a shared geographic and ecological context provides a suitable condition to study the mechanisms that promote speciation in large ecosystems by reducing the number of factors to be considered. Here, we determined the correlation between speciation and ecosystem size, and discussed the...
Mantel and partial Mantel test data and scripts of mimetic evolution of Papilio polytes in the Ryukyu Islands, JapanYukuto Sato, Haruki Tatsuta, Kaori Tsurui-Sato & Kazuki Tsuji
Batesian mimicry is a striking example of Darwinian evolution, and the swallowtail butterfly Papilio polytes exhibits Batesian mimicry polymorphism. These P. polytes populations show various mimic ratios among the Ryukyu Islands in Japan. We conducted Mantel and partial Mantel tests regarding the possible relationship among the mimic ratio differences, geographic distances, and average genetic distances among five islands of the Ryukyus based on 259 single nucleotide polymorphisms (SNPs) from 93 individuals.
Data from: Colonize, radiate, decline: unraveling the dynamics of island community assembly with Fijian trap-jaw antsCong Liu, Eli M. Sarnat, Nicholas R. Friedman, Francisco Hita Garcia, Clive Darwell, Douglas Booher, Yasuhiro Kubota, Alexander Mikheyev & Evan P. Economo
The study of island community assembly has been fertile ground for developing and testing theoretical ideas in ecology and evolution. The eco-evolutionary trajectory of lineages after colonization has been a particular interest, as this is a key component of understanding community assembly. In this system, existing ideas such as the taxon cycle posit that lineages pass through a regular sequence of eco-evolutionary changes after colonization, with lineages shifting toward reduced dispersal ability, increased ecological specialization,...
Genetic structures across a biogeographical barrier reflect dispersal potential of four Southeast Asian mangrove plant speciesAlison Wee, Annika Noreen, Junya Ono, Koji Takayama, Prakash Kumar, Hugh Tan, Mohd Saleh, Tadashi Kajita, Edward Webb, Alison K. S. Wee, Annika M. E. Noreen, Prakash P. Kumar, Hugh T. W. Tan, Mohd N. Saleh & Edward L. Webb
Aim Biogeographic barriers restrict the movement of individuals, resulting in population divergence, genetic differentiation, endemism and speciation. Yet, some barriers demonstrate unequal effect across species depending on species dispersal, which manifests in varying genetic structure. We test the hypotheses that the genetic structure of four coastal mangrove species would reflect differences in dispersal potential across the Malay Peninsula, a major biogeographic barrier in the Indo-West Pacific region. Location Twelve sites from the east and west...
Small isolated populations are vulnerable to both stochastic events and the negative consequences of genetic drift. For threatened species, the genetic management of such populations has therefore become a crucial aspect of conservation. Flying foxes (Pteropus spp, Chiroptera) are keystone species with essential roles in pollination and seed dispersal in tropical and subtropical ecosystems. However, many flying fox species are also threatened, having experienced dramatic population declines driven by habitat loss and hunting. The insular...
A major research question concerning global pelagic biodiversity remains unanswered: when did the apparent tropical biodiversity depression (i.e., bimodality of latitudinal diversity gradient [LDG]) begin? The bimodal LDG may be a consequence of recent ocean warming or of deep-time evolutionary speciation and extinction processes. Using rich time-slice datasets of planktonic foraminifers, we show here that a unimodal (or only weakly bimodal) diversity gradient, with a plateau in the tropics, occurred during the last ice age...
Data from: Ecological mechanism of climate-mediated selection in a rapidly evolving invasive speciesAlexandra Mushegian, Naresh Neupane, Zachary Batz, Motoyoshi Mogi, Nobuko Tuno, Takako Toma, Ichiro Miyagi, Leslie Ries & Peter Armbruster
Recurring seasonal changes can lead to the evolution of phenological cues. For example, many arthropods undergo photoperiodic diapause, a programmed developmental arrest induced by short autumnal day length. The selective mechanisms that determine the timing of autumnal diapause initiation have not been empirically identified. We quantified latitudinal clines in genetically determined diapause timing of an invasive mosquito, Aedes albopictus, on two continents. We show that variation in diapause timing within and between continents is explained...
University of the Ryukyus10
Victoria University of Wellington1
National Yang Ming University1
University of Washington1
University of Newcastle Australia1
University of Erlangen-Nuremberg1
Higher University of San Andrés1
Kyoto University of Advanced Science1