Tropical freshwater sponges develop from gemmules faster than their temperate-region counterparts

Calheira, Ludimila; Lanna, Emílio; Pinheiro, Ulisses

doi:10.1007/s00435-019-00458-0

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…To accommodate such circumstances, these sponges are able to form gemmules, resistance structures made up of a protective spiculated cover that stores in its interior a large number of totipotent cells, known as thesocytes (Calheira et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of alkalinity and light intensity on the growth of the freshwater sponge Ephydatia fluviatilis (Porifera: Spongillidae)

et al. 2023

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The adaptation of sponges to freshwater environments was a major event in the evolutionary history of this clade. The transition from a marine environment to freshwater ecosystems entailed a great number of adaptations to more unstable habitats, such as the ability to form resistance gemmules as a defense mechanism against environmental adversity. However, data on the parameters that modulate hatching and growth of these animals are scarce. In the present study, the growth response capacity of Ephydatia fluviatilis (Porifera: Spongillidae) has been evaluated in relation to both water alkalinity and light intensity. The results obtained revealed a positive association between the growth capacity of this freshwater sponge and high alkalinity values. On the other hand, exposure to light, regardless of its intensity, affected the development and distribution of the symbionts, which in turn, corresponds to a higher growth rate of the sponge. The obtained data suggest an explanation for the greater distribution of this species in alkaline environments. The results of this work also shed light on the importance of the symbiosis phenomenon in E. fluviatilis.

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Section: Introductionmentioning

confidence: 99%

Effect of alkalinity and light intensity on the growth of the freshwater sponge Ephydatia fluviatilis (Porifera: Spongillidae)

et al. 2023

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“…Gemmulation is another very common way of asexual reproduction in freshwater sponges. In addition, sponges display different mechanisms for forming buds (Ayling, 1980; Calheira et al, 2019; Fell, 1974; Simpson, 1984). Apart from the mechanism (fragmentation, budding, or gemmulation), the strategy of asexual reproduction could be important for maintaining sponge populations, especially in highly dynamic environments (Cardone et al, 2010; Corriero et al, 1996; Manconi & Pronzato, 2016; Wulff, 1991).…”

Section: Introductionmentioning

confidence: 99%

Reproductive cycles of the oviparous sponges Cinachyrella apion (Spirophorida) and Tethya maza (Tethyida) in a tropical intertidal environment

Vasconcellos

Lanna

2022

Invertebrate Biology

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Environmental factors are constantly changing in the intertidal region. Consequently, the various benthic organisms that densely colonize this ocean area had to adapt to these constant changes. Reproductive strategy might be considered one of these adaptations. However, knowledge about this aspect of the biology of marine invertebrates is still contentious for some groups, especially with regard to sponges (Porifera). Here, we investigated the effects of different environmental factors on the timing and effort of sexual and asexual reproduction in Cinachyrella apion and Tethya maza, two oviparous demosponges in Salvador, Bahia, Brazil. We analyzed the influence of humidity, atmospheric temperature, seawater temperature, photoperiod, rainfall, height of low tides, and chlorophyll-a concentration on the density and size of oocytes and buds of these sponges. Both species reproduced aperiodically.Cinachyrella apion had a maximum 2.8 ± 4.04 oocytes/mm 2 and 0.73 ± 0.15 buds/ mm 2 , whereas T. maza had a maximum 6.0 ± 12.21 oocytes/mm 2 and 0.31 ± 0.13 buds/mm 2 . The density of oocytes in C. apion was positively influenced by chlorophyll-a concentration, whereas that of T. maza was negatively modulated by relative humidity. We did not observe any relationship between the environmental factors and bud density in C. apion, but bud density variation in T. maza was positively related to chlorophyll-a concentration and to seawater temperature. It seems that individuals of both species alternated between the production of sexual and asexual propagules, suggesting a trade-off between reproductive modes. Therefore, asexual and sexual reproduction seems to impact population growth and reproduction of both species, likely contributing to the recruitment of new sponges. In tropical intertidal regions, multiple environmental factors seem to contribute more to determining the quantity of sexual and asexual reproductive elements rather than the species' reproductive period.

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Some Approaches to the Recovery of Baikal Sponge Populations: A Review

Topchiy

Stom²,

Tolstoy³

et al. 2023

Contemp. Probl. Ecol.

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Tropical freshwater sponges develop from gemmules faster than their temperate-region counterparts

Cited by 4 publications

References 22 publications

Effect of alkalinity and light intensity on the growth of the freshwater sponge Ephydatia fluviatilis (Porifera: Spongillidae)

Effect of alkalinity and light intensity on the growth of the freshwater sponge Ephydatia fluviatilis (Porifera: Spongillidae)

Reproductive cycles of the oviparous sponges Cinachyrella apion (Spirophorida) and Tethya maza (Tethyida) in a tropical intertidal environment

Some Approaches to the Recovery of Baikal Sponge Populations: A Review

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