Aplysina red band syndrome:: a new threat to Caribbean sponges

被引:44
|
作者
Olson, J. B.
Gochfeld, D. J.
Slattery, M.
机构
[1] Univ Alabama, Dept Biol Sci, Tuscaloosa, AL 35487 USA
[2] Univ Mississippi, Natl Ctr Nat Prod Res, University, MS 38677 USA
[3] Univ Mississippi, Dept Pharmacognosy, University, MS 38677 USA
关键词
sponge; Aplysina cauliformis; disease; syndrome; coral reef;
D O I
10.3354/dao071163
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
A substantial and increasing number of reports have documented dramatic changes and continuing declines in Caribbean coral reef communities over the past 2 decades. To date, the majority of disease reports have focused on scleractinian corals, whereas sponge diseases have been less frequently documented. In this study, we describe Aplysina red, band syndrome (ARBS) affecting Caribbean rope sponges of the genus Aplysina observed on shallow reefs in the Bahamas. Visible signs of disease presence included 1 or more rust-colored leading edges, with or without a trailing area of necrotic tissue, such that the lesion forms a contiguous band around part or all of the sponge branch. Microscopic examination of the leading edge of the disease margin indicated that a cyanobacterium was consistently responsible for the coloration. Although the presence of this distinctive coloration was used to characterize the diseased state, it is not yet known whether this cyanobacterium is directly responsible for disease causation. The prevalence of ARBS declined significantly from July to October 2004 before increasing above July levels in January 2005. Transmission studies in the laboratory demonstrated that contact with the leading edge of an active lesion was sufficient to spread ARBS to a previously healthy sponge, suggesting that the etiologic agent, currently undescribed, is contagious. Studies to elucidate the etiologic agent of ARBS are ongoing. Sponges are an essential component of coral reef communities and emerging sponge diseases clearly have the potential to impact benthic community structure on coral reefs.
引用
收藏
页码:163 / 168
页数:6
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