Early post-settlement events and recruitment ofmarine invertebrates

早期定居后事件和海洋无脊椎动物的招募

• 批准号: 249803-2010
• 负责人: Hunt, Heather
• 金额: $ 1.82万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=479355
• 关键词: Early; post; settlement; events; recruitment

In marine environments, there has been growing recognition that the numbers of juveniles added to the population in a given year, known as recruitment, is extremely variable. This variation in recruitment must be understood to predict population dynamics and make management decisions for commercially important species. Marine species commonly reproduce by producing large numbers of larvae that are transported long distances and have high mortality, uncoupling the supply of new individuals from local reproduction. Most studies assume that patterns of recruitment reflect larval supply or patterns of settlement of larvae. However, my research program has been demonstrating that mortality and dispersal after settlement can have crucial effects on recruitment success. The proposed research program builds on my previous research with the goal of developing a better understanding of the influence of dispersal and mortality during the early post-settlement period on recruitment of bottom-dwelling marine invertebrates. This research will be carried out in two habitats: mudflats and the subtidal fouling community found on docks and other structures. On mudflats, we will examine the linkages between dispersal of juvenile bivalves (e.g. the soft shell clam) and hydrodynamics (currents, waves, movement of sediment) as well as the role of clam burrowing behaviour in dispersal. This research program will also assess the effect of pH and carbonate saturation state as a source of mortality of juvenile bivalves. The ocean is predicted to become more acidic in future due to increasing CO2 emissions. This ocean acidification is expected to impact organisms with calcium carbonate skeletons like bivalves. The final objective of the proposed research program is to investigate the effects of delay of metamorphosis of larvae on the outcome of early post-settlement competition and predation using invasive and native species of ascidians. This research program will substantially advance our understanding of the role of early post-settlement events in recruitment of marine invertebrates. Ultimately, the proposed research program will advance our understanding of coastal marine habitats and assist in managing and conserving marine resources.

在海洋环境中，人们越来越认识到，在给定的一年中增加的少年人数（称为招聘）是极大的变化。必须理解招聘的这种差异，以预测人口动态并为商业重要物种做出管理决策。海洋物种通常通过产生大量长途运输并具有高死亡率的幼虫来繁殖，从而解开了新个个体的供应局部繁殖。大多数研究都认为，募集模式反映了幼虫的幼虫供应或幼虫定居模式。但是，我的研究计划已经证明，定居后的死亡率和散布对招聘成功产生至关重要的影响。拟议的研究计划以我先前的研究为基础，目的是更好地理解分散后早期对陆地海洋无脊椎动物招募的散布和死亡率的影响。这项研究将在两个栖息地中进行：泥质和在码头和其他结构上发现的下端结垢社区。在泥浆上，我们将检查少年双壳类（例如软壳蛤）和流体动力学（电流，波浪，沉积物的运动）以及蛤row挖掘行为在分散中的作用之间的联系。该研究计划还将评估pH和碳酸盐饱和状态作为少年双壳类死亡率的来源。由于二氧化碳排放量的增加，预计将来的海洋将来会变得更加酸性。预计这种海洋酸化会影响碳酸钙骨架（如双壳类）的生物。拟议的研究计划的最终目标是研究幼虫变形延迟对使用侵入性和本地腹部种类的早期植物后竞争和捕食结果的影响。该研究计划将大大促进我们对早期分配事件在招募海洋无脊椎动物中的作用的理解。最终，拟议的研究计划将提高我们对沿海海洋栖息地的了解，并协助管理和保护海洋资源。