5/28/2023 0 Comments Zotz strain![]() ![]() homunculus in the transmission of Plasmodium in Serra do Mar, southeastern Atlantic Forest. The findings of the current study raise important questions about the role of An. The bromeliad factor that influenced mosquito abundance and assemblage structure was fullness. Conclusions: One of the main findings of our study was that differences in species among mosquito assemblages were influenced by landscape characteristics. homunculus were taken from the same bromeliad, however, the co-occurrence between those two species was not statistically significant. Renyi diversity index show that lowland possesses the highest diversity indices. Landscape categories (pseudo-F value = 1.89, p = 0.04), bromeliad water volume (pseudo-F = 2.99, p = 0.03) and bromeliad fullness (Pseudo-F = 4.47, p < 0.01) influenced mosquito assemblage structure. Results: A total of 2,024 mosquitoes belonging to 22 species were collected. Univariate binary logistic regression analyses were used to assess species co-occurrence. Differences in species diversity between bromeliads within each category of elevation were explored using the Renyi diversity index. Correlations between bromeliad mosquito assemblage and environmental variables were assessed using multivariate redundancy analysis. ![]() Collection sites were divided into landscape categories (lowland, hillslope and hilltop) based on elevation and slope. Methods: Larvae and pupae were collected monthly from Nidularium and Vriesea bromeliads between July 2008 and June 2009. Given that Atlantic Forest includes highly heterogeneous environments, a diverse and medically important Culicidae assemblage, and possible species co-occurrence, we evaluated mosquito assemblages from bromeliad phytotelmata in Serra do Mar (southeastern Brazil). The topographic complexity of the region creates a diverse array of microclimates, which can affect species distribution and diversity inside the forest. Other mechanisms that could produce the high rates of endemism in bromeliad fauna are discussed.īackground: The most substantial and best preserved area of Atlantic Forest is within the biogeographical sub-region of Serra do Mar. We suggest that the changes in water chemistry induced by the bromeliads could play an important role in isolating their microcosm communities from other freshwater systems. We attributed the population decline experienced by the pond organisms to the oligotrophic conditions generated inside the tanks by the bromeliads due to the nutrient absorption. The pond organism populations introduced in the bromeliads presented a high extinction rate and a significant population decrease when compared to the ones introduced in the controls. The samples introduced inside the cleaned bromeliads showed a significant decrease in pH and conductivity compared to the controls. The pH, conductivity and organism densities were monitored in the bromeliad samples and controls for 41 days. We cultivated three invertebrates species (an ostracod, an annelid and a cladoceran) from a pond surrounded by terrestrial bromeliads in Southeastern Brazil and introduced them inside cleaned bromeliads, using recipients with the same volume as controls. We performed a set of experiments to determine which factors maintain the bromeliad aquatic fauna in isolation from neighbouring ponds. Tank bromeliads harbour aquatic microcosms with many endemic species among their leaves. ![]()
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