| Title | Planktonic and periphytic bdelloid rotifers from Thailand reveal a species assemblage with a combination of cosmopolitan and tropical species |
| Abstract | The dispersal pattern of microorganisms has been a debated topic in the last decade, because for microscopic organisms
with dispersing stages, biogeographic barriers may not exist and geographic distances may have little effect on the
probability of their occurrence. In this study we tested whether a group of microscopic animals, the bdelloid rotifers,
sampled in a tropical country, could indeed be cosmopolitan, strictly tropical, and/or have endemic species. We sampled
freshwater habitats throughout Thailand in dry and rainy seasons between 2014 and 2016, focusing on permanent water
bodies, where the prevalence of species producing resting stages acting as propagules for dispersal should be minimal and
thus dispersal limitation should exist, with several species being narrowly distributed. We used traditional morphological
identification, geometric morphometric analyses on the shape and size of the jaws, and DNA taxonomy to identify species
and to quantify the morphological and genetic distances of Thai samples in comparison with data on bdelloids from other
areas in the world. We found a total of 12 species of planktonic and periphytic bdelloid rotifers, and all approaches we used,
qualitative and quantitative, confirmed a group of nine potentially cosmopolitan species already known from other
continents, one tropical oriental species, and two new species with a potentially narrow geographic distribution, one of
which we here formally describe. We thus support the idea that for microscopic animals the moderate endemicity
hypothesis suggested for protists may also hold true: most of the species we found indeed have a wide geographic
distribution, but other species with narrower distributions do exist. |
| Source | Systematics and biodiversity (Online) |
| Keywords | rotiferathailand |
| Journal | Systematics and biodiversity (Online) |
| Editor | Cambridge University Press, Cambridge, Regno Unito |
| Year | 2018 |
| Type | Articolo in rivista |
| DOI | 10.1080/14772000.2017.1353554 |
| Authors | Rapeepan Jaturapruek; Diego Fontaneto; Phuripong Meksuwan; Pornsilp Pholpunthin; Supiyanit Maiphae |
| Text | 376394 2018 10.1080/14772000.2017.1353554 rotifera thailand Planktonic and periphytic bdelloid rotifers from Thailand reveal a species assemblage with a combination of cosmopolitan and tropical species Rapeepan Jaturapruek; Diego Fontaneto; Phuripong Meksuwan; Pornsilp Pholpunthin; Supiyanit Maiphae Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand; CNR ISE Verbania; Kasetsart University 10900, Thailand The dispersal pattern of microorganisms has been a debated topic in the last decade, because for microscopic organisms with dispersing stages, biogeographic barriers may not exist and geographic distances may have little effect on the probability of their occurrence. In this study we tested whether a group of microscopic animals, the bdelloid rotifers, sampled in a tropical country, could indeed be cosmopolitan, strictly tropical, and/or have endemic species. We sampled freshwater habitats throughout Thailand in dry and rainy seasons between 2014 and 2016, focusing on permanent water bodies, where the prevalence of species producing resting stages acting as propagules for dispersal should be minimal and thus dispersal limitation should exist, with several species being narrowly distributed. We used traditional morphological identification, geometric morphometric analyses on the shape and size of the jaws, and DNA taxonomy to identify species and to quantify the morphological and genetic distances of Thai samples in comparison with data on bdelloids from other areas in the world. We found a total of 12 species of planktonic and periphytic bdelloid rotifers, and all approaches we used, qualitative and quantitative, confirmed a group of nine potentially cosmopolitan species already known from other continents, one tropical oriental species, and two new species with a potentially narrow geographic distribution, one of which we here formally describe. We thus support the idea that for microscopic animals the moderate endemicity hypothesis suggested for protists may also hold true most of the species we found indeed have a wide geographic distribution, but other species with narrower distributions do exist. Preprint http //www.tandfonline.com/doi/abs/10.1080/14772000.2017.1353554 aey 2017_SystBiodiv_Jaturapruek et al EV.pdf Articolo in rivista Cambridge University Press 1478 0933 Systematics and biodiversity Online Systematics and biodiversity Online Systematics and biodiversity Online diego.fontaneto FONTANETO DIEGO |
