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首页> 外文期刊>Marine biology >Density, size structure and aspergillosis prevalence in Gorgonia ventalina at six localities in Puerto Rico
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Density, size structure and aspergillosis prevalence in Gorgonia ventalina at six localities in Puerto Rico

机译：波多黎各六个地方的Gorgonia ventalina的密度，大小结构和曲霉病患病率

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Gorgonia ventalina's density, size structure and lesion prevalence was measured at six sites in Puerto Rico that exhibited variation- in horizontal water transparency, sedimentation rates, suspended particle matter, scleractin-ian and macroalgal cover. G. ventalina density varied significantly among sites (between 0.84 and 0.007 colonies/ m~2), and was positively correlated with water transparency. Size structure did not vary much among sites, and reflects high mortality among the smaller size classes and high survivorship in large colonies. Prevalence of active fungi-induced lesions (type Ⅰ) did not vary significantly among sites and was density-independent. However, prevalence of old lesions of unknown origin (type Ⅱ) did vary among reefs and was negatively correlated with water transparency. Prevalence of types Ⅰ or Ⅱ lesions was independent of colony size. Our results suggest that (1) turbidity and sedimentation are important abiotic factors controlling the abundance of sea fans, (2) variation in settlement success and early survivorship of recruits has more impact on the sea fan populations than variation in the survivorship of large colonies and (3) prevalence of aspergillosis (type Ⅰ) at the studied sites is similar to that reported for other Caribbean reefs and supports the epizootic nature of the disease and (4) lesions with exposed skeleton are more likely to be colonized by fouling organisms at impacted reefs. The combined effects of anthropogenic impacts and aspergillosis may cause local extinctions of sea fans, as is becoming evident in many reefs in Puerto Rico.
机译：在波多黎各的六个地点测量了Gorgonia ventalina的密度，大小结构和病变患病率，这些地点显示出水平水透明度，沉降速率，悬浮颗粒物，菌核和巨藻覆盖率的变化。不同部位的通心草密度差异很大（在0.84至0.007个菌落/ m〜2之间），并且与水透明度呈正相关。大小结构在不同地点之间变化不大，反映了较小大小类别的高死亡率和大菌落的高存活率。活动性真菌引起的病变（Ⅰ型）的患病率在各部位之间无显着差异，且与密度无关。但是，未知来源的旧病灶（Ⅱ型）的患病率在珊瑚礁之间确实存在差异，并且与水的透明度呈负相关。 Ⅰ型或Ⅱ型病变的发生率与菌落大小无关。我们的结果表明，（1）浊度和沉积是控制海扇数量的重要非生物因素，（2）新兵的定居成功和早期存活率的变化对海扇种群的影响大于大殖民地和大洋洲幸存者的变化。 （3）研究地点的曲霉病（Ⅰ型）患病率与其他加勒比礁地区的报道相似，并支持该疾病的流行性；（4）骨骼裸露的病斑更容易被受污染的生物定殖。礁石。人为影响和曲霉病的综合影响可能导致海扇局部灭绝，这在波多黎各的许多珊瑚礁中已变得显而易见。

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