Declining Coral Calcification on the Great Barrier Reef

被引:458
作者
De'ath, Glenn [1 ]
Lough, Janice M. [1 ]
Fabricius, Katharina E. [1 ]
机构
[1] Australian Inst Marine Sci, Townsville, Qld 4810, Australia
关键词
MASSIVE PORITES; OCEAN ACIDIFICATION; CLIMATE-CHANGE; TEMPERATURE; GROWTH; VARIABILITY; CENTURIES; SEAWATER; CARBON;
D O I
10.1126/science.1165283
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Reef- building corals are under increasing physiological stress from a changing climate and ocean absorption of increasing atmospheric carbon dioxide. We investigated 328 colonies of massive Porites corals from 69 reefs of the Great Barrier Reef ( GBR) in Australia. Their skeletal records show that throughout the GBR, calcification has declined by 14.2% since 1990, predominantly because extension ( linear growth) has declined by 13.3%. The data suggest that such a severe and sudden decline in calcification is unprecedented in at least the past 400 years. Calcification increases linearly with increasing large- scale sea surface temperature but responds nonlinearly to annual temperature anomalies. The causes of the decline remain unknown; however, this study suggests that increasing temperature stress and a declining saturation state of seawater aragonite may be diminishing the ability of GBR corals to deposit calcium carbonate.
引用
收藏
页码:116 / 119
页数:4
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