Environmental control of asexual reproduction and somatic growth of Aurelia spp. (Cnidaria, Scyphozoa) polyps from the Adriatic Sea

Autor: Stefano Piraino, Cathy H. Lucas, Nathan Damien Hubot
Přispěvatelé: Hubot, Nathan, Lucas, Cathy H., Piraino, Stefano
Jazyk: angličtina
Předmět:
0106 biological sciences
Cnidaria
Salinity
Jellyfish
Scyphozoa
Speciation
Adaptation
Biological
Marine and Aquatic Sciences
lcsh:Medicine
Fresh Water
Asexual reproduction
Physical Chemistry
01 natural sciences
lcsh:Science
Phylogeny
Data Management
media_common
Multidisciplinary
biology
Temperature
Habitats
Phylogenetics
Chemistry
Productivity (ecology)
Habitat
Physical Sciences
Asexual reproduction
growth
environmental control
polyps
scyphozoan blooms
Reproduction
Research Article
Freshwater Environments
Computer and Information Sciences
Evolutionary Processes
Oceans and Seas
media_common.quotation_subject
Zoology
Environment
010603 evolutionary biology
Sea Water
biology.animal
Reproduction
Asexual
Cryptic Speciation
Animals
Evolutionary Systematics
14. Life underwater
Ecosystem
Taxonomy
Evolutionary Biology
010604 marine biology & hydrobiology
Ecology and Environmental Sciences
lcsh:R
Organisms
Aquatic Environments
Biology and Life Sciences
Bodies of Water
biology.organism_classification
Invertebrates
Marine Environments
Lakes
Chemical Properties
Earth Sciences
lcsh:Q
Adaptation
Zdroj: PLOS ONE
PLoS ONE, Vol 12, Iss 6, p e0178482 (2017)
PLoS ONE
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0178482
Popis: Polyps of two moon jellyfish species, Aurelia coerulea and A. relicta, from two Adriatic Sea coastal habitats were incubated under multiple combinations of temperature (14, 21°C), salinity (24, 37 ppt) and food regime (9.3, 18.6, 27.9 μg C ind−1 week−1) to comparatively assess how these factors may influence major asexual reproduction processes in the two species. Both species exhibited a shared pattern of budding mode (Directly Budded Polyps: DBP; Stolonal Budded Polyps: SBP), with DBP favoured under low food supply (9.3 μg C ind −1 week−1) and low temperature (14°C), and SBP dominant under high temperature (21°C). However, A. coerulea showed an overall higher productivity than A. relicta, in terms of budding and podocyst production rates. Further, A. coerulea exhibited a wide physiological plasticity across different temperatures and salinities as typical adaptation to ecological features of transitional coastal habitats. This may support the hypothesis that the invasion of A. coerulea across coastal habitats worldwide has been driven by shellfish aquaculture, with scyphistoma polyps and resting stages commonly found on bivalve shells. On the contrary, A. relicta appears to be strongly stenovalent, with cold, marine environmental optimal preferences (salinity 37 ppt, T ranging 14–19°C), corroborating the hypothesis of endemicity within the highly peculiar habitat of the Mljet lake. By exposing A. relicta polyps to slightly higher temperature (21°C), a previously unknown developmental mode was observed, by the sessile polyp regressing into a dispersive, temporarily unattached and tentacle-less, non-feeding stage. This may allow A. relicta polyps to escape climatic anomalies associated to warming of surface layers and deepening of isotherms, by moving into deeper, colder layers. Overall, investigations on species-specific eco-physiological and ontogenetic potentials of polyp stages may contribute to clarify the biogeographic distribution of jellyfish and the phylogenetic relationships among evolutionary related sister clades.
Databáze: OpenAIRE
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