Species composition and distribution of rotifers in Chihuahuan Desert waters of México: is everything everywhere?

Wallace, Robert L.; Walsh, Elizabeth J.; Schröder, Thomas; Rico‐Martínez, Roberto; Ríos-Arana, Judith V.

doi:10.1080/03680770.2008.11902087

Cited by 11 publications

(20 citation statements)

References 5 publications

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“…Although Chihuahuan desert aquatic habitats have been widely sampled (Walsh et al. , 2007; Wallace et al. , 2008), E. chihuahuaensis has been found in few locations.…”

Section: Discussionmentioning

confidence: 99%

Genetic differentiation, behavioural reproductive isolation and mixis cues in three sibling species of Monogonont rotifers

Schröder

Walsh

2010

Freshwater Biology

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Summary Many aquatic species usually considered to be ‘cosmopolitan’ have been identified as cryptic species complexes, based on deep genetic differentiation. However, reproductive isolation among sibling cryptic species has rarely been studied, and interspecific hybridization is common in some taxa.We investigated isolation mechanisms and possible introgression among three cyclical parthenogenetic rotifer species in the Epiphanes senta complex that are found in very different freshwater habitats: temperate floodplains, subtropical desert rock pools and a tropical alpine lake. Whereas Epiphanes ukera is reproductively isolated from E. chihuahuaensis and E. hawaiiensis, the latter hybridize under laboratory conditions.While reproductive isolation is incomplete, RAPD profiles indicated unique genetic signatures and showed no evidence for introgression, indicating that these three species are diverging and have independent evolutionary trajectories.Testing cues for sexual reproduction in these cyclic parthenogens demonstrated that mixis in E. chihuahuaensis and E. ukera is influenced by population density, whereas E. hawaiiensis females rarely produce mictic offspring regardless of density. Different mixis cues are likely to separate sexual periods and effectively cause reproductive isolation between the species. Epiphanes ukera and E. chihuahuaensis males display mate guarding behaviour, and E. ukera males distinguish between conspecific and heterospecific females in mate choice experiments. Geographic isolation, along with different cues for mixis induction and mate recognition, act as reproductive barriers among these sibling species.

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“…Although Chihuahuan desert aquatic habitats have been widely sampled (Walsh et al. , 2007; Wallace et al. , 2008), E. chihuahuaensis has been found in few locations.…”

Section: Discussionmentioning

confidence: 99%

Genetic differentiation, behavioural reproductive isolation and mixis cues in three sibling species of Monogonont rotifers

Schröder

Walsh

2010

Freshwater Biology

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“…Until now, only two published papers are available at species level for rotifers and cladocerans from Mexican brackish waters (Mecoacan lagoon (Sarma et al 2000) and Sontecomapan lagoon (Castellanos-Páez et al 2005)). More recently, two works have been published about the rotifers diversity of inland saline waters contributing to 22 new records from Mexico (Wallace et al 2005(Wallace et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variations of zooplankton community in a shallow tropical brackish lagoon (Sontecomapan, Veracruz, Mexico)

et al. 2014

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Background: We studied the relationships between zooplankton distribution and environmental and trophic factors (abiotic variables, nutrients, bacterial biomass, and chlorophyll pigments) from three sampling surveys carried out during the three hydrological seasons (rainy, dry, and norte) in a tropical coastal lagoon connected to the sea. Results: Twenty eight (28) of the 54 taxa recorded were identified to species level, of which 3 genera of Cladocera were observed for the first time in the lagoon. Season-specific differences were highly significant. The overall zooplankton abundance was significantly higher during the dry season (157,000 ind.m −3 ) than those during the rainy and norte surveys (means of 11,600 and 16,700 ind.m −3 respectively). Copepoda (mostly nauplii) was the most abundant group (>83%) of total zooplankton abundance. Conclusions: Multivariate (coinertia) and multilinear regression analyses showed that transparency, salinity, temperature, pH, and food availability (Chl a, b, and c) were the main determinants of zooplankton abundance, composition, and diversity, explaining the seasonal differences. The relatively low zooplankton density in the lagoon compared to other eutrophic lagoons is attributed to the combined effects of high water exchanges, low depth, and high transparency, which favor instability and vulnerability to UV effects and/or to visual predation.

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“…Rotifers and ciliates, which comprised a considerable proportion of the plankton and epiphyton diversity, did not differ significantly among the studied water bodies. Both of these organisms have high dispersal ability due to their small body size and dormant stages, showing broad distributions typical for microscopic organisms (Fontaneto et al, 2008;Wallace et al, 2008). Spatial distribution of plankton, epiphyton and macroinvertebrate abundances and biomasses accorded with their diversity pattern, the highest values of which occurred in the Sutla backwater with complex submerged Ceratophyllum stands.…”

Section: Discussionmentioning

confidence: 80%

Disentangling food webs interactions in the littoral of temperate shallow lakes

et al. 2017

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Elucidation of food web interactions provides a better understanding of ecosystem functioning, indicates anthropogenic impacts which often cause alterations in environmental conditions and deterioration in feeding networks in terrestrial and aquatic ecosystems. The importance of microfauna and macroinvertebrates in the littoral zones of shallow waters has been poorly studied regarding their trophic interactions. This study compares invertebrate assemblage and food web interactions among epiphyton, zooplankton and benthic macroinvertebrates across structural heterogeneity in the littoral zone of three temperate shallow water bodies. Submerged and structurally-complex stands of Ceratophyllum demersum inhabited a higher abundance of cladocerans and supported a higher diversity and biomass of epiphytic protozoans and invertebrates than floating-leaved Nuphar lutea stands. Analysis of the ecosystem functioning illustrated the increased biomass of macroinvertebrate predators and a preference of predation over planktonic crustaceans in more complex macrophyte stands. Food webs displayed higher complexity and size with habitat heterogeneity, while epiphyton and zooplankton shared an important fraction in food resources among the invertebrate trophic network. Results of food web modelling indicated zooplankton and epiphyton as more vulnerable to invertebrate predation in the complex submerged macrophytes than in the floating-leaved macrophyte stands. Integrated approaches to community, ecosystem and food webs in explanation of complex trophic interactions in the littoral zones confirmed an increase in diversity and food-web functional complexity with structural heterogeneity of microhabitats. Razjašnjenje interakcija u hranidbenoj mreži omogućuje bolje razumijevanje funkcioniranja ekosustava te indikaciju antropogenih učinaka koji često uzrokuju promjene uvjeta okoliša i narušavanje hranidbene mreže kopnenih i vodenih ekosustava. Trofičke interakcije mikrofaune i makrozoobentosa slabo su proučavane u priobalnim (litoralnim) zonama plitkih vodenih tijela. Cilj ovog rada je usporediti interakcije beskralježnjaka i izvora hrane, uključujući epifiton, zooplankton i makrozoobentos u strukturno heterogenim litoralnim zonama triju plikih jezera umjerenog pojasa. U submerznim i strukturno složenim makrofitskim sastojinama vrste Ceratophyllum demersum NAT. CROAT. VOL. 26 No 2 145-166 ZAGREB DECEMBER 31, 2017146 Špoljar, M. et al.: Disentangling food webs interactions in the littoral of temperate shallow lakes rašljoticalci su razvili populacije velike brojnosti, a također je u njima zbilježena veća raznolikost i biomasa epifitskih protozoa i beskralježnjaka u usporedbi sa sastojinama plutajuće vrste Nuphar lutea. Analiza funkcioniranja ekosustava ukazivala je na to da je u heterogenim makrofitskim sastojinama povećana biomasa makrozoobentoskih predatora i izraženija je njihova predacija nad planktonskim rakovima. Hranidbene mreže bile su složenije u heterogenima staništima, a epifiton i zooplankton imali su važan udio u hranidbe...

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Species composition and distribution of rotifers in Chihuahuan Desert waters of México: is everything everywhere?

Cited by 11 publications

References 5 publications

Genetic differentiation, behavioural reproductive isolation and mixis cues in three sibling species of Monogonont rotifers

Genetic differentiation, behavioural reproductive isolation and mixis cues in three sibling species of Monogonont rotifers

Spatiotemporal variations of zooplankton community in a shallow tropical brackish lagoon (Sontecomapan, Veracruz, Mexico)

Disentangling food webs interactions in the littoral of temperate shallow lakes

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