Epiphytic hydroids on Posidonia oceanica seagrass meadows are winner organisms under future ocean acidification conditions: evidence from a CO2 vent system (Ischia Island, Italy)
| Autor: | Francesco Cozzoli, M. C. Gambi, Cinzia Gravili |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
ocean acidification 010603 evolutionary biology 01 natural sciences Mediterranean sea Colonization 14. Life underwater mediterranean sea Epibiont biology Ecology Settlement (structural) 010604 marine biology & hydrobiology species checklist Ocean acidification 15. Life on land biology.organism_classification Seagrass Geography QL1-991 13. Climate action Posidonia oceanica Animal Science and Zoology Epiphyte epiphytic hydrozoa seagrasses Zoology |
| Zdroj: | The European Zoological Journal, Vol 88, Iss 1, Pp 472-486 (2021) The European Zoological Journal 88 (2021): 472–486. doi:10.1080/24750263.2021.1899317 info:cnr-pdr/source/autori:Gravili, C.; Cozzoli, F.; Gambi, M. C./titolo:Epiphytic hydroids on Posidonia oceanica seagrass meadows are winner organisms under future ocean acidification conditions: evidence from a CO2 vent system (Ischia Island, Italy)/doi:10.1080%2F24750263.2021.1899317/rivista:The European Zoological Journal/anno:2021/pagina_da:472/pagina_a:486/intervallo_pagine:472–486/volume:88 |
| DOI: | 10.6084/m9.figshare.14357413.v1 |
| Popis: | Effects of ocean acidification (OA) on the plant phenology and colonization/settlement pattern of the hydrozoan epibiont community of the leaves of the seagrass Posidonia oceanica have been studied at volcanic CO2 vents off Ischia (Italy). The study was conducted in shallow Posidonia stands (2.5-3.5 m depth), in three stations on the north and three on the south sides of the vent's area (Castello Aragonese vents), distributed along a pH gradient. At each station, 10-15 P. oceanica shoots were collected every three months for one-year cycle (Sept 2009-2010). The shoot density of Posidonia beds in the most acidified stations along the gradient (pH < 7.4) was significantly higher than that in the control area (pH = 8.10). On the other hand, we recorded lower leaf lengths and widths in the acidified stations in the whole year of observations, compared to those in the control stations. However, the overall leaf surface (Leaf Area Index) available for epiphytes under ocean acidification conditions was higher on the south side and on both the most acidified stations because of the higher shoot density under OA conditions. The hydrozoan epibiont community on the leaf canopy accounted for seven species, three of which were relatively abundant and occurring all year around (Sertularia perpusilla, Plumularia obliqua, Clytia hemisphaerica). All hydroids species showed a clear tolerance to low pH levels, including chitinous and non-calcifying forms, likely favoured also by the absence of competition for substratum with the calcareous forms of epiphytes selected against OA. |
| Databáze: | OpenAIRE |
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