CRB: Population Structure and Biodiversity of Atlantic Reef Fishes

CRB：大西洋珊瑚礁鱼类的种群结构和生物多样性

• 批准号: 9727048
• 负责人: Brian Bowen
• 金额: $ 14.75万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 2001-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9727048&HistoricalAwards=false
• 关键词: CRB; Population; Structure; Biodiversity; Atlantic

Bowen 9727048 This research will use molecular genetic technology to investigate the limits of dispersal for reef fishes among the four primary reef habitats of the tropical Atlantic: Caribbean Sea, Brazil, mid-Atlantic ridge (Ascension Island), and Gulf of Guinea (West Africa). DNA sequences will be compared among populations of French angelfish (Pomacanthus paru), blackbar squirrelfish (Myripristis jacobus) and five other species to track patterns of colonization and gene flow across the Atlantic Ocean. Reef fish don't move much as adults, so dispersal is accomplished primarily by drifting eggs and larvae. How far can reef fish disperse as larvae? This question is of fundamental importance for understanding the natural recolonization of reef habitats damaged by anthropogenic factors. Reef habitats in Brazil and the Caribbean Sea are separated by 2000 kms of muddy coastline (between the Orinoco and Amazon River basins). West Atlantic reefs are separated from African reefs by 4000 kms of open ocean. Population genetic assessments at these two geographic scales should resolve the limitations of reef fish dispersal. A central focus of this research is the role of Ascension Island on the mid-Atlantic ridge in facilitating colonization between east and west Atlantic. If Ascension Island functions as a stepping stone for colonization across the Atlantic, then this oceanic island may play a substantial (and previously unrecognized) role in enhancing the biodiversity of West Atlantic reef habitats.

Bowen 9727048这项研究将使用分子遗传技术来研究热带大西洋的四个主要珊瑚礁栖息地之间的礁鱼的分散极限：加勒比海，巴西，中大西洋山脊（升天岛）和几内亚的墨西哥湾（西非）。 将比较法国人女妇女（Pomacanthus paru），黑鸭松鼠（Myripristis jacobus）和其他五个物种的DNA序列，以跟踪跨大西洋的殖民化和基因流动的模式。 礁鱼不像成年人那样移动太多，因此分散主要是通过漂移卵和幼虫来完成的。 礁鱼分散为幼虫有多远？ 这个问题对于理解人为因素损害的礁栖息地的自然再殖民化至关重要。 巴西和加勒比海的珊瑚礁栖息地被2000公里的泥泞海岸线（Orinoco和Amazon River盆地之间）隔开。 西大西洋礁与非洲珊瑚礁相距4000公里。 在这两个地理量表上的人口遗传评估应解决礁鱼的局限性。 这项研究的主要重点是升天岛上中大西洋山脊在促进东大西洋之间的殖民化中的作用。如果升天岛是整个大西洋殖民化的垫脚石，那么这个海洋岛上可能在增强西大西洋礁栖息地的生物多样性方面发挥了重要的作用（并且以前未被认可）。