Kiryu Y, Landsberg J H, Peters E C, Tichenor E, Burleson C, Perry N
Fish and Wildlife Research Institute (FWRI), Florida Fish and Wildlife Conservation Commission (FWC), 100 Eighth Avenue SE, St. Petersburg, FL 33701, USA.
Department of Environmental Science and Policy, George Mason University, Fairfax, VA 22030, USA.
J Invertebr Pathol. 2015 Jul;129:13-27. doi: 10.1016/j.jip.2015.04.007. Epub 2015 May 7.
In early August 2008, observations by divers indicated that sea fans, particularly Gorgonia ventalina, Gorgonia flabellum, and Iciligorgia schrammi, were being covered by benthic filamentous cyanobacteria. From August 2008 through January 2009 and again in April 2009, tissue samples from a targeted G. ventalina colony affected by cyanobacteria and from a nearby, apparently healthy (without cyanobacteria) control colony, were collected monthly for histopathological examination. The primary cellular response of the sea fan to overgrowth by cyanobacteria was an increase in the number of acidophilic amoebocytes (with their granular contents dispersed) that were scattered throughout the coenenchyme tissue. Necrosis of scleroblasts and zooxanthellae and infiltration of degranulated amoebocytes were observed in the sea fan surface tissues at sites overgrown with cyanobacteria. Fungal hyphae in the axial skeleton were qualitatively more prominent in cyanobacteria-affected sea fans than in controls.
2008年8月初，潜水员观察发现，海扇，尤其是扇枝柳珊瑚、扇形柳珊瑚和施氏艾氏柳珊瑚，正被底栖丝状蓝细菌覆盖。从2008年8月到2009年1月，以及在2009年4月，每月从一个受蓝细菌影响的目标扇形柳珊瑚群体和附近一个明显健康（无蓝细菌）的对照群体采集组织样本，进行组织病理学检查。海扇对蓝细菌过度生长的主要细胞反应是嗜酸性变形细胞数量增加（其颗粒内容物分散），这些细胞散布在共肉组织中。在蓝细菌过度生长的部位，海扇表面组织中观察到造骨细胞和虫黄藻坏死以及脱颗粒变形细胞浸润。与对照相比，受蓝细菌影响的海扇轴骨骼中的真菌菌丝在定性上更为突出。
