Plasticidade morfológica em microalgas induzida por predação por Chironomus cf. xanthus Hempel,1939 (Insecta: Chironomidae) ; Morphological plasticity in microalgae induced by Chironomus cf. xanthus Hempel, 1939 (Insecta: Chironomidae) predation
| العنوان: | Plasticidade morfológica em microalgas induzida por predação por Chironomus cf. xanthus Hempel,1939 (Insecta: Chironomidae) ; Morphological plasticity in microalgae induced by Chironomus cf. xanthus Hempel, 1939 (Insecta: Chironomidae) predation |
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| المؤلفون: | Fernandes, Suzana Luisa Alves |
| المساهمون: | Bagatini, Inessa Lacativa, http://lattes.cnpq.br/3904631503604006Test, Fusari, Lívia Maria, http://lattes.cnpq.br/4951378712238107Test, http://lattes.cnpq.br/4214494765998822Test |
| بيانات النشر: | Universidade Federal de São Carlos UFSCar Câmpus São Carlos Ciências Biológicas - CB |
| سنة النشر: | 2021 |
| المجموعة: | Repositório Institucional Universidade Federal de São Carlos (RI UFSCar) |
| مصطلحات موضوعية: | Defesa induzida, Microalgas, Chironomidae, Plasticidade morfológica, CIENCIAS BIOLOGICAS::BOTANICA::MORFOLOGIA VEGETAL, CIENCIAS BIOLOGICAS::ECOLOGIA::ECOLOGIA APLICADA |
| الوصف: | Microalgae and cyanobacteria are photosynthetic microorganisms with different morphologies and may present phenotypic plasticity under predation risk. They are primary producers in aquatic environments and can be predated by innumerous heterotrophic groups, including benthic invertebrates. Among important benthic invertebrates which feed on microalgae, especially green microalgae, diatoms and cyanobacteria, there is the genus of insects Chironomus (Chironomidae, Diptera). Although the morphological variation of microalgae to avoid predation by planktonic invertebrates has been well documented, little is known about the phenotypic plasticity in microalgae predated by those larvae. In this project, we evaluated the morphological plasticity in microalgae as a defense to predation by Chironomus cf. xanthus larvae. We evaluated the morphological alterations in three microalgae strains of the species: Desmodesmus spinosus, since this genus usually presents phenotypic plasticity under predation by other invertebrates; and two microalgae belonging to genera found in benthos, habitat of the larvae: Micrasterias cf. pinnatifida, a green alga (desmid) and Cyclotella sp. a centric diatom. D. spinosus was evaluated directly over predation, however, due to methodological issues, the other algae were evaluated under the extracellular substances released by the larvae. The experiments were performed in triplicates. Under predation, D. spinosus presented significant increase in the coenobium dimensions on the second day, and in the maximum linear dimension (between spines) at the fourth day of growth; in this same period, a higher number of unicellular individuals was observed. Micrasterias biomass and chlorophyll a concentration (determined by cell count and absorbance) increased significantly on the second day in indirect contact with chironomids. In Cyclotella, extracellular substances released by the chironomid larvae (indirect contact), significantly increased the maximum linear dimensions of the individuals after 2 days, ... |
| نوع الوثيقة: | other/unknown material |
| اللغة: | Portuguese |
| العلاقة: | FERNANDES, Suzana Luisa Alves. Plasticidade morfológica em microalgas induzida por predação por Chironomus cf. xanthus Hempel,1939 (Insecta: Chironomidae). 2021. Trabalho de Conclusão de Curso (Graduação em Ciências Biológicas) – Universidade Federal de São Carlos, São Carlos, 2021. Disponível em: https://repositorio.ufscar.br/handle/ufscar/16296Test.; https://repositorio.ufscar.br/handle/ufscar/16296Test |
| الإتاحة: | https://repositorio.ufscar.br/handle/ufscar/16296Test |
| حقوق: | Attribution-NonCommercial-NoDerivs 3.0 Brazil ; http://creativecommons.org/licenses/by-nc-nd/3.0/brTest/ |
| رقم الانضمام: | edsbas.46E50AF1 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |