Acid-base adjustments and first evidence of denticle corrosion caused by ocean acidification conditions in a demersal shark species
| Autor: | Lutz Auerswald, Christopher R. Bridges, Joachim Enax, Sarika Singh, Jacqueline Dziergwa, Sven E. Kerwath |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Chronic exposure Haploblepharus Oceans and Seas Chemie lcsh:Medicine Zoology 010603 evolutionary biology 01 natural sciences Article pCO2 Demersal zone Environmental impact Animal physiology medicine Animals Seawater lcsh:Science Acid-Base Equilibrium Skin protection Multidisciplinary biology 010604 marine biology & hydrobiology lcsh:R Ocean acidification Hydrogen-Ion Concentration biology.organism_classification respiratory tract diseases Hydrodynamics Sharks Dental Pulp Calcification Upwelling lcsh:Q medicine.symptom Hypercapnia circulatory and respiratory physiology |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-10 (2019) |
| ISSN: | 2045-2322 |
| Popis: | Global ocean acidification is expected to chronically lower the pH to 7.3 (>2200 µatm seawater pCO2) by the year 2300. Acute hypercapnia already occurs along the South African west and south coasts due to upwelling- and low-oxygen events, with increasing frequency. In the present project we investigated the impact of hypercapnia on the endemic demersal shark species Haploblepharus edwardsii. Specifically, we experimentally analysed acid-base regulation during acute and chronic hypercapnia, the effects of chronic hypercapnia on growth rates and on denticle structure- and composition. While H. edwardsii are physiologically well adapted to acute and chronic hypercapnia, we observed, for the first time, denticle corrosion as a result of chronic exposure. We conclude that denticle corrosion could increase denticle turnover and compromise hydrodynamics and skin protection. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|