Effects of elevated temperature on the shell density of the large benthic foraminifera Amphistegina lobifera

Prazeres, Martina and Pandolfi, John M. (2016) Effects of elevated temperature on the shell density of the large benthic foraminifera Amphistegina lobifera. Journal of Eukaryotic Microbiology, 63 6: 786-793. doi:10.1111/jeu.12325


Author Prazeres, Martina
Pandolfi, John M.
Title Effects of elevated temperature on the shell density of the large benthic foraminifera Amphistegina lobifera
Formatted title
Effects of elevated temperature on the shell density of the large benthic foraminifera Amphistegina lobifera
Journal name Journal of Eukaryotic Microbiology   Check publisher's open access policy
ISSN 1550-7408
1066-5234
Publication date 2016-06-02
Year available 2016
Sub-type Article (original research)
DOI 10.1111/jeu.12325
Open Access Status Not yet assessed
Volume 63
Issue 6
Start page 786
End page 793
Total pages 8
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
This study investigated the effects of elevated temperature on shell density and Mg-ATPase activity of Amphistegina lobifera. This species is abundant in shallow reef habitats, and can be vulnerable to daily physicochemical fluctuations. To assess potential responses and acclimation mechanisms of A. lobifera to changing temperature conditions, we performed a blocked-design experiment exposing specimens collected from different reef sites (inshore and offshore) to three temperature treatments (Control: 24 °C, + 2 °C: 26 °C and + 5 °C: 29 °C) for 30 days. The final size and shell density of inshore reef foraminifera were unaffected by elevated temperature, and the enzyme activity in these individuals showed that they were able to acclimate to new temperature conditions. In contrast, offshore A. lobifera were more sensitive to changes in temperature, and heat stress caused growth impairment and inhibited Mg-ATPase activity. However, newly added chambers were not affected. These results suggested that Mg-ATPase plays an important role in regulating intracellular Mg2+ ions, but has little influence in the onset of calcification in A. lobifera. Moreover, it suggests that even though A. lobifera can regulate intracellular functions, local habitat seems to play a crucial role in determining how foraminifera respond to environmental changes.
Keyword Acclimation
Enzyme activity
Great Barrier Reef
Mg-ATPase
Size
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Biological Sciences Publications
 
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