The Role of Periphyton on the Amazon River Floodplain

附着生物在氮磷循环中的作用 将对亚马逊河漫滩进行调查。 低地 像亚马逊河这样的大河的洪泛平原是 河流系统中生物生产力最高。 一 洪泛区的主要特征， 高生产力是养分保持。 佩里菲顿群岛 在营养捕获和再循环方面， 洪泛区 周丛藻也被认为是一种重要的 不稳定的碳和营养物质的来源到开放的沃茨的 亚马逊从附着生物中获得的碳和营养物质依次 被认为是重要的支持大 开放沃茨的次级生产，包括鱼类生产。 附着生物在亚马逊河漫滩的重要性 使用state.of.the.art技术进行研究。 比如说， 氚标记的胸苷将用于测定微生物活性。 附着生物作为能源的重要性， 将使用稳定同位素确定开放的水食物链。 而从现场的具体研究结果将在外推 在遥感技术的帮助下扩大到更大的规模。 一 这些技术中有多种将被使用，包括陆地卫星TM （30X30米分辨率）和合成孔径雷达（SAR）。 的 遥感技术将有助于确定 泛滥平原的栖息地。 这项研究的意义在于它将帮助我们 了解洪泛区在行动中扮演的角色 热带地区的大型河流流域。 这些地区 在不断扩大的发展压力下， 人口。 洪泛区在这些系统中的重要性 往往被忽视。 这项研究应提供文件 这一重要性，并提供科学依据， 明智地管理这些资源。 费希尔和梅莱克博士的生产力记录良好 在这个非常艰苦的环境中工作。 的 向他们提供的机构支助是最好的上级。

The role of periphyton in nitrogen and phosphorus cycling in the Amazon floodplain will be investigated. Lowland floodplains of large rivers like the Amazon are sites of the highest biological productivity within the river system. A key characteristic of floodplains that leads to their high productivity is nutrient retention. Periphyton is conjectured to be important in nutrient trapping and recycling in the floodplain. Periphyton is also thought to be an important source of labile carbon and nutrients to the open waters of the Amazon. The carbon and nutrients derived from periphyton in turn are thought to be important in the support of the large secondary production of open waters, including fish production. The importance of periphyton in the Amazon floodplain will be studied using state.of.the.art techniques. For example, tritiated thymidine will be used to determine microbial activity. The importance of periphyton as an energy source for open.water food chains will be determined using stable isotopes. And the results from site.specific studies will in extrapolated to larger scales with the aid of remote sensing technologies. A variety of these technologies will be used including LANDSAT TM (30X30 m resolution) and synthetic aperture radar (SAR). The remote sensing technologies will help to establish the extent of floodplain habitat. The significance of this research is that it will help us to understand what role the floodplains play in the operation of large river basins in the tropics. These areas are under increasing development pressure from the expanding human population. The importance of floodplains in these systems is often ignored. This research should provide documentation of this importance and provide a scientific basis for wise management of this resource. Drs. Fisher and Melack have good records of productivity working in this very difficult field environment. The institutional support available to them is superior.