Environmental factors related to the production of a complex set of spicules in a tropical freshwater sponge.

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Autor(es): dc.creatorMatteuzzo, Marcela Camargo-
Autor(es): dc.creatorRibeiro, Cecília Volkmer-
Autor(es): dc.creatorVarajão, Angélica Fortes Drummond Chicarino-
Autor(es): dc.creatorVarajão, César Augusto Chicarino-
Autor(es): dc.creatorAlexandre, Anne-
Autor(es): dc.creatorGuadagnin, Demetrio L.-
Data de aceite: dc.date.accessioned2025-08-21T15:54:42Z-
Data de disponibilização: dc.date.available2025-08-21T15:54:42Z-
Data de envio: dc.date.issued2017-10-03-
Data de envio: dc.date.issued2017-10-03-
Data de envio: dc.date.issued2015-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/8844-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/0001-3765201520140461-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1027256-
Descrição: dc.descriptionAdverse natural conditions will, generally, induce gemmulation in freshwater sponges. Because of this environmental dependence, gemmoscleres are given exceptional value in taxonomic, ecological and paleoenvironmental studies. Other spicules categories such as microscleres and beta megascleres have received little attention with regard to their occurrence and function during the sponge biological cycle. Metania spinata, a South American species common to bog waters in the Cerrado biome, produces alpha and beta megascleres, microscleres and gemmoscleres. To detect the environmental factors triggering the production of all these kinds of spicules, the species annual seasonal cycle was studied. Artificial substrates were devised, supplied with gemmules and placed in Lagoa Verde pond which contained a natural population of M. spinata. Field monitoring was conducted for eight months in order to observe the growth of sponges and spicules formation. Samples of water were taken monthly for physical and chemical parameters determination. The appearance of the alpha megascleres was sequentially followed by that of microscleres, gemmoscleres and beta megascleres. The first ones built the new sponge skeleton, the last three were involved in keeping inner moisture in the sponge body or its gemmules. The water level, temperature and the silicon (Si) concentration in the pond were the most important factors related to this sequential production of spicules, confirming environmental reconstructions based on the presence or absence of alpha megascleres and gemmoscleres in past sediments.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsaberto-
Direitos: dc.rightsOs trabalhos publicados no periódico Anais da Academia Brasileira de Ciências, exceto onde identificado, está sob uma licença Creative Commons que permite copiar, distribuir e transmitir o trabalho desde que sejam citados o autor e o licenciante. Fonte: Anais da Academia Brasileira de Ciências <http://www.scielo.br/scielo.php?script=sci_serial&pid=0001-3765&lng=en&nrm=iso>. Acesso em: 23 jan. 2020.-
Palavras-chave: dc.subjectField monitoring-
Palavras-chave: dc.subjectMetania spinata-
Palavras-chave: dc.subjectSpicules-
Palavras-chave: dc.subjectPaleointerpretations-
Título: dc.titleEnvironmental factors related to the production of a complex set of spicules in a tropical freshwater sponge.-
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