Haemolymph [Na+] and [Cl-] loss in Gammarusfossarum exposed in situ to a wide range ofacidic streams

Diseases of Aquatic Organisms

Vincent Felten¹  François Guerold¹ 

关键词: Gammarus fossarum;    Haemolymph;    Ion loss;    Acid stress;    In situ markers;   

DOI  :  10.3354/dao061113

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: The acid-sensitive amphipod Gammarus fossarum was exposed in situ for 24, 96 and 168 h to 18 streams (9 draining from granite and 9 draining from sandstone bedrock), selected in order to provide a wide range of acidification. After24 h, exposure to slightly acidic (6.00 ¾ pH ¾ 5.50) and strongly acidic water (pH < 5.50) led to a severe and significant depletion in haemolymph [Na⁺] and [Cl^-] compared to organisms exposed in circumneutral water. Highlysignificant linear correlations between stream mean pH value and haemolymph [Na⁺] and [Cl^-] were observed for each exposure time on each bedrock. Organisms exposed to slightly acid streams draining granite bedrock (pH = 5.71, pH =5.81) showed a physiological adaptation after 96 h of exposure, while animals in acidic sandstone streams did not. Results of this study indicate that haemolymph [Na⁺] and [Cl^-] in G. fossarum could be an effectiveecophysiological marker for monitoring freshwater ecosystem acidification.

【 授权许可】

Unknown