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DOI | https://doi.org/10.1594/PANGAEA.835969 |
Acid-base physiology response to ocean acidification of two ecologically and economically important holothuroids from contrasting habitats, Holothuria scabra and Holothuria parva | |
Collard; Marie; Eeckhaut; Igor; Dehairs; Frank; Dubois; Philippe | |
发布日期 | 2014-09-15 |
数据集类型 | dataset |
英文关键词 | Acid-base regulation ; Animalia ; Benthic animals ; Benthos ; Coast and continental shelf ; Containers and aquaria (20- 1000 L or < ; 1 m**2) ; Echinodermata ; Holothuria parva ; Holothuria scabra ; Indian Ocean ; Laboratory experiment ; Other metabolic rates ; Respiration ; Single species ; Tropical |
英文简介 | Sea cucumbers are dominant invertebrates in several ecosystems such as coral reefs, seagrass meadows and mangroves. As bioturbators, they have an important ecological role in making available calcium carbonate and nutrients to the rest of the community. However, due to their commercial value, they face overexploitation in the natural environment. On top of that, occurring ocean acidification could impact these organisms, considered sensitive as echinoderms are osmoconformers, high-magnesium calcite producers and have a low metabolism. As a first investigation of the impact of ocean acidification on sea cucumbers, we tested the impact of short-term (6 to 12 days) exposure to ocean acidification (seawater pH 7.7 and 7.4) on two sea cucumbers collected in SW Madagascar, Holothuria scabra, a high commercial value species living in the seagrass meadows, and H. parva, inhabiting the mangroves. The former lives in a habitat with moderate fluctuations of seawater chemistry (driven by day-night differences) while the second lives in a highly variable intertidal environment. In both species, pH of the coelomic fluid was significantly negatively affected by reduced seawater pH, with a pronounced extracellular acidosis in individuals maintained at pH 7.7 and 7.4. This acidosis was due to an increased dissolved inorganic carbon content and pCO2 of the coelomic fluid, indicating a limited diffusion of the CO2 towards the external medium. However, respiration and ammonium excretion rates were not affected. No evidence of accumulation of bicarbonate was observed to buffer the coelomic fluid pH. If this acidosis stays uncompensated for when facing long-term exposure, other processes could be affected in both species, eventually leading to impacts on their ecological role. |
语种 | 英语 |
国家 | 国际 |
学科大类 | 气候变化 |
学科子类 | 气候变化 |
文献类型 | 数据集 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/217322 |
推荐引用方式 GB/T 7714 | Collard,Marie,Eeckhaut,et al. Acid-base physiology response to ocean acidification of two ecologically and economically important holothuroids from contrasting habitats, Holothuria scabra and Holothuria parva.2014-09-15.https://doi.org/10.1594/PANGAEA.835969. |
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