Title

Bleaching in a Reef-dwelling Foraminifer, Amphistegina gibbosa

Document Type

Conference Proceeding

Publication Date

1993

Keywords

ICRS7, Stress, Bleaching, Amphistegina gibbosa, Foraminifera

Abstract

In field collections from reefs off Key Largo, Florida, in September 199 1, 80% of living adolescent and adult Amphistegina gibbosa, a larger foraminifer that hosts diatom endosymbionts, ex- hibited either mottling or extensive symbiont-color loss. Many Cnidaria in the vicinity also were bleached. Comparison of September and Novem- ber abundance and size-frequency data indicated high mortality, particularly in bleached size classes. Although the cause of bleaching in A. gibbosa has yet to be determined, laboratory observations in- dicate that this species may be vulnerable to ele- vated ultraviolet radiation. In 199 1, volcanic aero- sols globally reduced visible and infrared radiation and promoted stratospheric ozone depletion, thereby increasing UV radiation reaching the sea surface.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Proceedings of the 7th International Coral Reef Symposium, v. 1, p. 44-49

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