SGER: Development of in Situ Techniques for Quantifying Rates of Feeding, House Production and House Flux by Appendicularians

SGER：开发现场技术，用于量化 Appendologicians 的采食率、鸡舍产量和鸡舍流量

• 批准号: 0086229
• 负责人: Marsh Youngbluth
• 金额: --
• 依托单位: Harbor Branch Oceanographic Institution, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0086229&HistoricalAwards=false
• 关键词: SGER; Development; Situ; Techniques; Quantifying

The contribution of midwater appendicularians to particle dynamics remains understudied in marine food webs. This project will develop in situ submersible-based techniques that will lead to more detailed, long-term investigations of the ecological role of species with relatively large houses (1-30 cm diameter). These species are poorly known but ubiquitous in water column environments on a global scale, are often numerous, and are tractable targets for in situ documentation of rates of feeding, house production, and house flux. The limited but compelling amount of field information about these omnivorous, non-selective filter feeders suggests that they may have a central role in the flux of material throughout the water column, especially in particle-rich layers. First, appendicularians are capable of rapid generation times. Second, most species are capable of high grazing rates on a wide spectrum of particles, including microbial phytoplankton, bacteria, and detritus. The rate of export or recycling of biogenic carbon from particle-laden appendicularian houses depends upon several factors. For example, the investigator believes that particle loading on houses in the epipelagic and epibenthic zones will vary in relation to surface production and resuspension, respectively. Rates (of particle selection, feeding, house-fecal pellet production, and house-fecal pellet sinking) will also vary with species, particle selection, and house age. Therefore, developing reliable field methods will be essential to better understand how behavioral and environmental parameters interact to influence the fate of particulate matter.

海洋食品网中，中间阑尾主义者对颗粒动力学的贡献仍在研究中。该项目将开发基于原位潜水的技术，这将导致对相对较大房屋（直径1-30 cm）物种的生态作用进行更详细的长期研究。这些物种在全球范围内众所周知，但在水柱环境中无处不在，通常是众多的，并且是原位记录喂养，房屋生产和房屋通量速率的可诉诸目标。有关这些杂食性的，非选择性的过滤器馈线的有限但引人注目的现场信息表明，它们可能在整个水柱的材料通量中具有核心作用，尤其是在富含粒子的层中。首先，阑尾主义者能够快速生成时间。其次，大多数物种能够在各种颗粒（包括微生物浮游植物，细菌和碎屑）上具有高放牧速率。从含有颗粒的阑尾房屋中生物碳的出口率或回收率取决于几个因素。例如，研究者认为，在表面产生和重悬于表面和重新悬浮方面，附近和表皮区域中的房屋上的颗粒将有所不同。 （颗粒选择，喂养，房屋狂热颗粒的产生和房屋 - 菲特颗粒下沉的速率）也会随物种，颗粒选择和房屋年龄的变化而变化。因此，开发可靠的场方法对于更好地了解行为和环境参数如何相互作用以影响颗粒物的命运至关重要。