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A-J: A. Cribraria intricata Schrad.; B. Craterium leucocephalum (Pers. ex J. F. Gmel.) Ditmar; C. C. paraguayense (Speg.) G. Lister; D. Physarum compressum Alb. & Schwein.; E. P. nucleatum Rex; F. Diachea silvaepluvialis M. L. Farr; G. Arcyria cinerea (Bull.) Pers.; H. Hemitrichia serpula (Scop.) Rost. ex Lister; I. Trichia DI¿QLV de Bary; J. Stemonitis fusca Roth.
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Some species belonging to the Bromeliaceae family are called tank-bromeliads, due to the arrangement of its leave in rosettes information about the presence of myxomycetes on Bromeliaceae is scarce, we evaluated the availability and occupation of microhabitats for these organisms offered by bromeliads in fragments of Atlantic Forest located in the...
Citations
... Many bromeliads have the capacity to store rainwater in a small and sometimes complex microcosm, the phytotelm (Benzing, 2000). Moreover, such "bromeliad tanks" store a supply of nutrients capable of supporting a wide variety of organisms such as zooplankton, macroinvertebrates and a whole food chain of vertebrates, like amphibians, which interact with each other and form a complex food web (Ngai & Srivastava, 2006;Ferreira & Cavalcanti, 2010;Islair et al., 2015). Even in bromeliads supporting a high diversity of organisms, changes in water induced by the bromeliads themselves can constitute a barrier for some species (Lopez et al., 2009). ...
Assumptions about the distribution of zooplankton communities in various ecosystems are often limited by lack of data on dispersal mechanisms. Many studies on frog-mediated passive dispersal have been developed in bromeliads, but they usually focus on ostracods and annelids. We investigated the potential for external phoresy of zooplankton (rotifers, cladocerans, copepods) by treefrogs in bromeliad phytotelms. Our hypotheses are that (1) zooplankton composition on frogs’ skin and in phytotelm tanks is similar, and (2) frogs with larger body size carry more propagules of these invertebrates. We filtered phytotelm water (10 to 150 mL) using plankton net (45 µm), and fixed invertebrates with 4% formalin. Frogs were actively collected in and around bromeliads (up to ~1.5 m radius) and then washed with distilled water. Fourteen species of rotifers and three of crustaceans were registered in phytotelm water and frog bodies. We captured 17 frogs with a snout-vent length (SVL) ranging from 2 to 5 cm and belonging to five species: Pristimantis ramagii (Boulenger, 1888), Dendropsophus decipiens (A. Lutz, 1925), Scinax auratus (Wied-Neuwied,1821), S. pachycrus (Miranda-Ribeiro, 1937) and S. x-signatus (Spix, 1824). Among them, 12 (70.59%) had propagules adhered to their bodies, of which the majority (ten individuals) had active zooplankton forms, while only two had dormant eggs. Ten rotifer and two microcrustacean species were recorded adhered to frogs. The zooplankton composition differed between phytotelms and anuran skin, and frog body size does not explain the number of propagules carried, refuting both hypotheses. However, evidence of dispersal was found due to the high number of propagules adhered to anurans. Our study provides evidence that frogs may be potential dispersers of dormant and active forms of zooplankton in bromeliads, through external phoresy.
... Myxomycetes are common inhabitants of several types of ecosystems, often developing on dead tree trunks and branches, litter and on the barks of living trees, microhabitats explored in almost every study published on the diversity of these microorganisms. Different types of aerial litter, such as dead leaves attached to tree branches and dead flowers retained in inflorescences still attached to the mother plant, are microhabitats that are also occupied by Myxomycetes in Neotropical rainforests (Bezerra et al., 2007;Costa et al., 2009;Ferreira and Cavalcanti, 2010;Maimoni-Rodella and Cavalcanti, 2006;Schnittler and Stephenson, 2000). Researching the occurrence of Myxomycetes in different types of microhabitats in Costa Rica, Puerto Rico and Ecuador rainforests, Schnittler and Stephenson (2002) proposed the term floricolous to characterize those species that occurred more frequently on dead floral parts protected by still living inflorescence bracts of large herbs, such as those belonging to the Costaceae, Heliconiaceae, Maranthaceae and Zingiberaceae families, of the Zingiberales order. ...
... In Brazil, information on the occurrence of Myxomycetes in inflorescences is scarce and dispersed in the literature (Cavalcanti and Mobin, 2004;Ferreira and Cavalcanti, 2010;Hochgesand and Gottsberger, 1996;Silva and Cavalcanti, 2010), and only Maimoni-Rodella and Cavalcanti (2006) deal specifically with the subject, recording the occurrence of five species in living plants of Hedychium coronarium J. König (Zingiberaceae), in the state of São Paulo. ...
... • Comments: With low representativeness in the analyzed floricolous myxobiota, the only specimen obtained sporulated on material from PFSP, exhibiting the typical characteristics of the species. (Hochgesand and Gottsberger, 1996;Ferreira and Cavalcanti, 2010). ...
The occurrence of Myxomycetes in Heliconia psittacorum L.f. inflorescences was researched within four conservation units located in Northeast Brazil, aiming at evaluating the occupation of this microhabitat in fragments of Atlantic Forest along an altitude between 30-750 m. Inflorescences attached to the plant were examined; dead flowers and bracts were collected to assemble moist chambers (368). Four families, four genera and 10 species were recorded. A preference was evidenced for a basic pH substrate and a predominance of calcareous species (5:1). The composition of the myxobiota in fragments pertaining to altitudes above 400 m was similar and differed significantly from the one found in fragments of lowland forests (<100 m). Physarum compressum and Arcyria cinerea are the most characteristic species of the studied myxobiota.
... Nesses ambientes as bromélias são pioneiras e têm grande importância na sucessão ecológica devido aos processos de facilitação, promovendo a colonização de outras espécies de plantas formando moitas. Sua capacidade de armazenar água é utilizada por uma ampla diversidade de organismos, tais como: vírus, fungos, bactérias, leveduras, platelmintos, nematódios, anelídeos, moluscos, quilópodos, diplópodos, crutáceos, aracnídeos, insetos, anfíbios, répteis (LAESSLE, 1961;ARAÚJO et al., 1998;LOPEZ et al., 1998;RICHARDSON 1999;WITTMAN, 2000;MESTRE et al., 2001;CAVALCANTI, 2010;BROUARD et al., 2012), incluindo também outros vegetais FURTADO, 1993). ...
Livro com 361 páginas que reúne os resultados das principais pesquisas científicas em biodiversidade, que foram realizadas em unidades de conservação da natureza municipais sob a tutela da Prefeitura Municipal do Rio de Janeiro.
