Variações anuais e infra-anuais em ecossistemas subterrâneos: implicações para estudos ambientais e preservação de cavernas

Trajano, Eleonora

doi:10.7594/revbio.10.02.01

Cited by 13 publications

(16 citation statements)

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“…It is mandatory a robust sampling effort with standardized replicas to describe the taxonomic diversity and understand the community functioning (Trajano, 2013;Gallão and Bichuette, 2015). This affirmation is corroborated by estimators values observed at Figure 7, allied to the intermediary values of singletons and doubletons, which represent the occurrence of only one (single) or two (double) individuals in all samplings.…”

Section: Discussionsupporting

confidence: 51%

“…This affirmation is corroborated by estimators values observed at Figure 7, allied to the intermediary values of singletons and doubletons, which represent the occurrence of only one (single) or two (double) individuals in all samplings. Gallão and Bichuette (2015) and Bichuette et al (2015), studying sandstone and limestone caves, respectively, stressed this question and proposed the necessity of replicas on subterranean studies to discuss any distribution and diversity pattern, since they are related to intrinsic temporal variations (Trajano, 2013). The spatial and temporal distribution of cave fauna is influenced by several factors which presents variation in their occurrence, such as patches of vegetable organic matter, guano, concentration of prey (Trajano, 2013), allied to the desiccation of surface habitats in climatic marked regions (in this case, cave habitats operate as seasonal shelters).…”

Section: Discussionmentioning

confidence: 99%

“…Gallão and Bichuette (2015) and Bichuette et al (2015), studying sandstone and limestone caves, respectively, stressed this question and proposed the necessity of replicas on subterranean studies to discuss any distribution and diversity pattern, since they are related to intrinsic temporal variations (Trajano, 2013). The spatial and temporal distribution of cave fauna is influenced by several factors which presents variation in their occurrence, such as patches of vegetable organic matter, guano, concentration of prey (Trajano, 2013), allied to the desiccation of surface habitats in climatic marked regions (in this case, cave habitats operate as seasonal shelters). The seasonality must influences the communities, as observed for the cave fauna of Riacho Subterrâneo cave, where several groups showed higher richness and abundance in the beginning of wet seasons when floods carry organic matter, the trophic basis of detritivores.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Terrestrial fauna of the largest granitic cave from Southern Hemisphere, southeastern Brazil: A neglected habitat

Bichuette¹,

Nascimento²,

Schimonsky³

et al. 2017

Neotropical Biology and Conservation

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Studies focusing cave fauna on granitic caves are relatively rare when compared to carbonatic ones and no one considered replicas in the sampling to test fauna distribution patterns. We describe the terrestrial fauna of Riacho Subterrâneo cave through four sampling occasions (replicas) in different seasons. We analyzed seasonality and substrate preference of terrestrial invertebrates and discussed the importance of this neglected habitat as a refuge for fauna. Furthermore, we stressed the importance of the replicas in order to detect subterranean biodiversity patterns. The cave represents the greatest richness considering igneous rocks in Brazil (199 taxa) and has an important role as refuge for epigean fauna, besides the maintenance of troglophilic and trogloxene populations.

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Section: Discussionsupporting

confidence: 51%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Terrestrial fauna of the largest granitic cave from Southern Hemisphere, southeastern Brazil: A neglected habitat

Bichuette¹,

Nascimento²,

Schimonsky³

et al. 2017

Neotropical Biology and Conservation

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“…Outra ameaça tanto para a Gruta Casa de Pedra, como também para outras cavernas na área cárstica de Lagoa da Confusão, é a exploração de calcário na região, e que devido ao Decreto 6640, de 2008, agora existe a possibilidade de destruição de cavernas inteiras (Trajano, 2013), mesmo essas tendo alto grau de relevância biológi-ca. Considerando que o município da Lagoa da Confusão está situado em uma área de alta diversidade biológica (Brasil, 2001), a mineração na área representa uma grande ameaça à diversidade biológica cavernícola, que na região é ainda pouco estudada.…”

Section: Conservaçãounclassified

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2014

revbio

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Publica textos de todas as áreas da Biologia, abordando questões gerais (ensaios e revisões) e específicas (artigos experimentais originais, descrição de técnicas e resumos expandidos).Há espaço também para perspectivas pessoais sobre questões biológicas com relevância social e politica (opinião).A Revista da Biologia é gratuita e exclusivamente on-line. Sua reprodução é permitida para fins não comerciais. Revista da Biologia (2014) 12(2): 1-7 DOI: 10.7594/revbio.12.02.01 ISSN1984- O Relógio Biológico e os ritmos circadianos de mamíferos: uma contextualização históricaThe Biological Clock and the circadian rhythms of mammals: a history contextualization Resumo. O termo "relógio biológico" se refere ao conjunto de mecanismos endógenos capazes de conferir ritmicidade a processos fisiológicos e comportamentais do organismo independentemente das pistas ambientais externas. As estruturas responsáveis por gerar esta ritmicidade são denominadas "osciladores" e sua capacidade oscilatória circadiana é decorrente da expressão rítmica de certas proteínas ao longo do dia, codificadas pelos "genes do relógio". Nos mamíferos, o oscilador central é composto pelos núcleos supraquiasmáticos (NSQs), os quais são capazes de sincronizar o ritmo das outras células do corpo e os osciladores periféricos ao ciclo claro/escuro ambiental, permitindo que o organismo seja capaz de prever as variações externas circadianas. Fatores genéticos ou ambientais que prejudiquem esta sincronia podem causar diversos distúrbios fisiológicos, inclusive algumas formas de câncer. Palavras-chave. Ritmo circadiano; Oscilador; Núcleos supraquiasmáticos; Genes do relógio.Abstract. The term "biological clock" refers to the set of endogenous mechanisms able to confer rhythmicity to physiological and behavioral processes in the body, regardless of external environmental cues. The structures responsible for generating this rhythmicity are called "oscillators" and its circadian oscillatory ability is due to the rhythmic expression of certain proteins throughout the day, encoded by "clock genes". In mammals, the central oscillator is composed of the suprachiasmatic nuclei (SCN), which are able to synchronize the rhythm of the other body cells and peripheral oscillators to the environmental light / dark cycle, allowing the body to be able to predict the external circadian variations. Genetic or environmental factors that impair this synchrony may cause several physiological disorders, including some forms of cancer. Keywords. Circadian rhythm; Oscillator; Suprachiasmatic nuclei; Clock genes. *Contato do autor: le.biousp@gmail.com Revisão Ritmos biológicos: primeiras observaçõesA existência de ritmos biológicos em plantas, em animais e no homem foi relatada em muitos textos e livros no iní-cio da história do homem. Referências sobre eventos biológicos cíclicos podem ser encontradas, por exemplo, no livro do Gênesis e de Eclesiastes, nos relatos de Hipócra-tes, Aristóteles, entre outros. Porém, a primeira descrição detalhada e com caráter científico que se tem ...

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“…Infra-annual variations, i.e. fluctuations with a period longer than an annual cycle, have also been reported (Trajano 2013). Therefore, to classify subterranean organisms according to the Schiner-Racovitza system in a study, its experimental design should: 1) sample dur-ing three or more years to account, at least, for seasonal variations in the community composition (in order to uncover any cyclical pattern, the length of a study must be at least three times the period of the cycle; 2) include collections in epigean areas; 3) test for sampling sufficiency.…”

Section: Implications For Conservation Of Subterranean Ecosystemsmentioning

confidence: 99%

Towards a biologically meaningful classification of subterranean organisms: a critical analysis of the Schiner-Racovitza system from a historical perspective, difficulties of its application and implications for conservation

Trajano¹,

Carvalho²

2017

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Citation: Trajano E, Carvalho MR (2017) Towards a biologically meaningful classification of subterranean organisms: a critical analysis of the Schiner-Racovitza system frpm a historical perspective, difficulties of its application and implications for conservation. Subterranean Biology 22: 1-26. https://doi.org/10.3897/subtbiol.22.9759 Abstract Subterranean organisms always attracted the attention of humans using caves with various purposes, due to the strange appearance of several among them and life in an environment considered extreme. According to a classification based on the evolutionary and ecological relationships of these organisms with subterranean habitats, first proposed by Schiner in 1854 and emended by Racovitza in 1907, three categories have been recognized: troglobites, troglophles and trogloxenes. The Schiner-Racovitza system has been discussed, criticized, emended, the categories have been redefined, subdivided, original meanings have changed, but it is used until now. Herein we analyze in a conceptual framework the main ecological classifications of subterranean organisms, from Schiner to Trajano, in 2012, so far the last author to introduce a relevant conceptual change on the categories definitions, incorporating the source-sink population model. Conceptual inconsistencies are pointed, especially with regards to the generally ill-defined trogloxene category, and the correspondence between categories according to the original sense and in alternative classifications is discussed. Practical criteria for distinction between these categories and difficulties for their application are presented. The importance of rightly classifying subterranean populations according to the Schiner-Racovitza system for conservation of these fragile and mostly threatened habitats is discussed.

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Variações anuais e infra-anuais em ecossistemas subterrâneos: implicações para estudos ambientais e preservação de cavernas

Cited by 13 publications

References 10 publications

Terrestrial fauna of the largest granitic cave from Southern Hemisphere, southeastern Brazil: A neglected habitat

Terrestrial fauna of the largest granitic cave from Southern Hemisphere, southeastern Brazil: A neglected habitat

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Towards a biologically meaningful classification of subterranean organisms: a critical analysis of the Schiner-Racovitza system from a historical perspective, difficulties of its application and implications for conservation

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