Estudo da diversidade morfológica em populações de Micrasterias laticeps (Desmidiaceae, Zygnematophyceae) e suas implicações taxonômicas e nomenclaturais
Data
2023-12-14
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Resumo
A espécie Micrasteria laticeps é classificada e identificada na literatura clássica, por meio de três medidas lineares (comprimento máximo da célula, largura máxima da semicélula e largura do istmo). Entretanto, devido ao polimorfismo e a ampla variabilidade morfológica documentada para essa espécie e a grande quantidade de variedades (quatorze no total), muito é questionado se tais medidas são suficientes para diferir indivíduos em categorias infraespecíficas. Nesse estudo, foram analisadas as três medidas lineares clássicas e propostas outras onze medidas lineares, a fim de melhorar a caracterização da espécie através do uso da morfometria linear. Foi observada ampla sobreposição de medidas, entretanto, oito atributos, todos propostos neste estudo, foram considerados eficientes para caracterizar e diferenciar pelos menos uma das três cepas analisadas. Além disso, também foi verificado que a largura do istmo apresentou pouca variação nas três cepas analisadas. Paralelo a isso, uma revisão bibliográfica foi realizada sobre o ensino de microalgas na educação básica. Foi observado que, pouco é discutido em sala de aula, e muitos alunos acabam associando a palavra alga ou algas com plantas terrestres, além de não compreenderem a importância que algas e microalgas possuem em termos ecológicos e até mesmo no cotidiano, gerando a cegueira ficológica.
The species Micrasteria laticeps is classified and identified in classical literature, using three linear measurements (maximum cell length, maximum semicell width and isthmus width). However, due to polymorphism and the wide morphological variability documented for this species and the large number of varieties (fourteen in total), it is often questioned whether such measures are sufficient to differentiate individuals into infraspecific categories. In this study, the three classical linear measurements were analyzed and another eleven linear measurements were proposed, in order to improve the characterization of the species through the use of linear morphometry. A wide overlap of measurements was observed, however, eight attributes, all proposed in this study, were considered efficient to characterize and differentiate at least one of the three strains analyzed. Furthermore, it was also found that the width of the isthmus showed little variation in the three strains analyzed. Parallel to this, a literature review was carried out on the teaching of microalgae in basic education. It was observed that little is discussed in the classroom, and many students end up associating the word algae with terrestrial plants, in addition to not understanding the importance that algae and microalgae have in ecological terms and even in everyday life, generating phycology blindness.
The species Micrasteria laticeps is classified and identified in classical literature, using three linear measurements (maximum cell length, maximum semicell width and isthmus width). However, due to polymorphism and the wide morphological variability documented for this species and the large number of varieties (fourteen in total), it is often questioned whether such measures are sufficient to differentiate individuals into infraspecific categories. In this study, the three classical linear measurements were analyzed and another eleven linear measurements were proposed, in order to improve the characterization of the species through the use of linear morphometry. A wide overlap of measurements was observed, however, eight attributes, all proposed in this study, were considered efficient to characterize and differentiate at least one of the three strains analyzed. Furthermore, it was also found that the width of the isthmus showed little variation in the three strains analyzed. Parallel to this, a literature review was carried out on the teaching of microalgae in basic education. It was observed that little is discussed in the classroom, and many students end up associating the word algae with terrestrial plants, in addition to not understanding the importance that algae and microalgae have in ecological terms and even in everyday life, generating phycology blindness.