Chave interativa de espécies lenhosas da Reserva Prof. Dr. Karl Arens, Corumbataí, SP
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2021-11-05
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Universidade Estadual Paulista (Unesp)
Resumo
As chaves de identificação são o principal instrumento na identificação taxonômica, sendo as dicotômicas as mais conhecidas e utilizadas. Apesar disso, as chaves interativas compostas por um software e uma matriz de dados com táxons e caracteres são mais flexíveis e intuitivas. Este estudo foi realizado na reserva Prof. Dr. Karl Arens, Corumbataí (SP), que é um remanescente de Cerrado protegido e sem registros de fogo desde 1962, e que atualmente apresenta o cerradão como fitofisionomia predominante. Apesar dos estudos já desenvolvidos na área, foi notada a ausência de materiais testemunho em herbário, relação dos vouchers nas publicações e de uma chave de identificação para a reserva, que também serve no desenvolvimento de aulas práticas com graduandos. Sendo assim, esse trabalho teve por objetivo a elaboração de uma chave interativa de múltiplas entradas para identificação de espécies lenhosas da reserva, por meio de levantamento florístico e de espécimes depositados em herbário. Através do levantamento realizado na coleção do Herbário Rioclarense (HRCB), foram obtidas 510 exsicatas pertencentes a 160 espécies de 44 famílias. Ao longo de 24 saídas de campo entre 2019 e 2021 foram coletadas 116 espécies de 39 famílias. Ao total, 191 espécies foram consideradas para a reserva de Corumbataí. Espécies como Copaifera langsdorffii e Myrcia neoclusiifolia já tinham sido citadas para a área, mas não possuíam voucher em herbário, até então. Novos registros foram feitos para a reserva, a exemplo de Machaerium nyctitans e Alchornea glandulosa. Fabaceae, Asteraceae, Myrtaceae, Melastomataceae e Rubiaceae foram as famílias com maior diversidade em espécie. A chave interativa foi construída com o software Lucid® e, utilizando características vegetativas e reprodutivas dos espécimes da reserva, a chave foi elaborada com 105 caracteres e 325 estados de caráter associados aos 191 táxons. A chave que está em versão preliminar, apresenta ilustrações para a maioria das espécies. Espera-se que a mesma possa facilitar a identificação das espécies, assim como contribuir no ensino e aprendizagem dos estudantes em aulas práticas. Devido ao livre acesso e possibilidade de contínua atualização, espera-se também que a chave possa servir de subsídio taxonômico a um público amplo.
Identification keys are the main instrument in taxonomic identification, with dichotomous ones being the most known and used. Despite this, the interactive keys composed of a software and a data matrix with taxa and characters are more flexible and intuitive. This study was carried out in the reserve Prof. Dr. Karl Arens, Corumbataí (SP), which is a protected remnant of Cerrado and without fire records since 1962, and which presents the cerradão as the predominant phytophysiognomy. Despite the studies already carried out in the area, it was noticed the absence of testimonial materials in the herbarium, list of vouchers in publications and an identification key for the reserve, which also serves in the development of practical classes with undergraduates. Thus, this work aimed to develop an interactive key with multiple entries for identifying woody species in the reserve, through a floristic survey and specimens deposited in the herbarium. Through the survey carried out in the collection of Herbário Rioclarense (HRCB), 510 specimens belonging to 160 species of 44 families were obtained. Over 24 field trips between 2019 and 2021, 116 species from 39 families were collected. In total, 191 species were considered for the Corumbataí reserve. Species such as Copaifera langsdorffii and Myrcia neoclusiifolia had already been mentioned for the area, but until then they did not have an herbarium voucher. New records were made for the reserve, such as Machaerium nyctitans and Alchornea glandulosa. Fabaceae, Asteraceae, Myrtaceae, Melastomataceae and Rubiaceae were the families with the highest species diversity. The interactive key was built with Lucid® software and, using vegetative and reproductive characteristics of specimens from the reserve, the key was created with 105 characters and 325 character states associated with 191 taxa. The key, which is in a preliminary version, presents illustrations for most species. It is expected that it can facilitate the identification of species, as well as contribute to the teaching and learning of students in practical classes. Due to free access and the possibility of continuous updating, it is also expected that the key can serve as a taxonomic subsidy to a wide audience.
Identification keys are the main instrument in taxonomic identification, with dichotomous ones being the most known and used. Despite this, the interactive keys composed of a software and a data matrix with taxa and characters are more flexible and intuitive. This study was carried out in the reserve Prof. Dr. Karl Arens, Corumbataí (SP), which is a protected remnant of Cerrado and without fire records since 1962, and which presents the cerradão as the predominant phytophysiognomy. Despite the studies already carried out in the area, it was noticed the absence of testimonial materials in the herbarium, list of vouchers in publications and an identification key for the reserve, which also serves in the development of practical classes with undergraduates. Thus, this work aimed to develop an interactive key with multiple entries for identifying woody species in the reserve, through a floristic survey and specimens deposited in the herbarium. Through the survey carried out in the collection of Herbário Rioclarense (HRCB), 510 specimens belonging to 160 species of 44 families were obtained. Over 24 field trips between 2019 and 2021, 116 species from 39 families were collected. In total, 191 species were considered for the Corumbataí reserve. Species such as Copaifera langsdorffii and Myrcia neoclusiifolia had already been mentioned for the area, but until then they did not have an herbarium voucher. New records were made for the reserve, such as Machaerium nyctitans and Alchornea glandulosa. Fabaceae, Asteraceae, Myrtaceae, Melastomataceae and Rubiaceae were the families with the highest species diversity. The interactive key was built with Lucid® software and, using vegetative and reproductive characteristics of specimens from the reserve, the key was created with 105 characters and 325 character states associated with 191 taxa. The key, which is in a preliminary version, presents illustrations for most species. It is expected that it can facilitate the identification of species, as well as contribute to the teaching and learning of students in practical classes. Due to free access and the possibility of continuous updating, it is also expected that the key can serve as a taxonomic subsidy to a wide audience.
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Cerrado, Chave interativa, Florística, Herbário, Taxonomia, Savanna, Interactive key, Floristic, Herbarium, Taxonomy