0000000000211514
AUTHOR
Jorge Ciros-pérez
Resource competition between sympatric sibling rotifer species
Mechanisms underlying competitive interactions are important in understanding the structure of planktonic communities, particularly the coexistence of similar species. Here we present experimental results of exploitative competition among three sympatric sibling species of the Brachionus plicatilis complex for two differently-sized species of food microalgae. These three rotifer species are to be found in seasonal succession in brackish ponds on the Spanish Mediterranean coast; they can, however, co-occur for long periods. The functional and numerical responses of the three Brachionus species to both food microalgae, although similar, differed. Neither rotifer population growth nor grazing …
On the taxonomy of three sympatric sibling species of the Brachionus plicatilis (Rotifera) complex from Spain, with the description of B. ibericus n. sp.
The accumulation of evidence during the last decade led to the splitting of the Brachionus plicatilis complex (Rotifera) into two morphologically recognizable species: B. plicatilis Muller and B. rotundiformis Tschugunoff, previously referred to as L- and S-type B. plicatilis (s.l.), respectively. However, recent population genetics and molecular studies have revealed that each of these taxa concern cryptic species complexes. In particular, in Torreblanca Marsh, a wetland on the Mediterranean coast of Spain, three genetically distinct groups in this rotifer complex have been shown to co-occur. Differences in genetic markers, ecological preferences, mixis responses, mating behaviour and no e…
Fifteen species in one: deciphering the Brachionus plicatilis species complex (Rotifera, Monogononta) through DNA taxonomy
Understanding patterns and processes in biological diversity is a critical task given current and rapid environmental change. Such knowledge is even more essential when the taxa under consideration are important ecological and evolutionary models. One of these cases is the monogonont rotifer cryptic species complex Brachionus plicatilis, which is by far the most extensively studied group of rotifers, is widely used in aquaculture, and is known to host a large amount of unresolved diversity. Here we collate a dataset of previously available and newly generated sequences of COI and ITS1 for 1273 isolates of the B. plicatilis complex and apply three approaches in DNA taxonomy (i.e. ABGD, PTP, …
THE FRESHWATER CLADOCERA (ORDERS CTENOPODA AND ANOMOPODA) OF MEXICO, WITH COMMENTS ON SELECTED TAXA
AbstractKnowledge of the composition and distribution of the freshwater Cladocera in Mexico is still limited. All the available literature was reviewed and added to our own new records in different states of Mexico to present here a revised and updated list of the 110 species of the orders Ctenopoda and Anomopoda recorded for the country, with separate state records. Ecological, biogeographical, and taxonomic comments are made for selected taxa of the commonest neotropical groups: Sididae, Daphniidae, Bosminidae, Macrothricidae, and Chydoridae. La connaissance de la composition et de la repartition des Cladoceres d'eau douce du Mexique est encore tres limitee. Toute la litterature disponibl…