Fish diversity and trophic interactions in Lake Sampaloc ( Luzon Is . , Philippines )
Fish diversity and trophic interactions in Lake Sampaloc ( Luzon Is . , Philippines )
复制标题
桑帕洛克湖（菲律宾吕宋岛）鱼类多样性和营养相互作用
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
N. Okuda
中科院分区：
文献类型：
--
作者：
J. C. Briones;R. D. Papa;Gil A. Cauyan;Norman;Mendoza;N. Okuda
在本文中，我们的目的是有助于保护研究的严重影响的热带湖泊生态系统的特征，以前未描述的鱼类多样性，并阐明其鱼类群落的营养结构。我们的研究区域是桑帕洛克湖，菲律宾吕宋岛南部地区的一个小火山口湖。几十年来，这个湖一直被大量用于经济资源功能，如水产养殖。有效执行监管规定的障碍对该湖产生了有害的生态影响，该湖最近被宣布为“2014年受威胁湖泊”。我们在两年内（2012年至2014年）进行了几次零星的鱼类调查，以确定湖中的鱼类。我们还使用稳定同位素分析来阐明重要的水生消费者的营养水平和生产依赖。我们发现，湖泊鱼类种群严重依赖于附着生物的生产，主要由非本地和潜在的入侵鱼类。此外，营养生态位重叠之间观察到非本地鱼类和本地物种。在过去的三十年里，桑帕洛克湖一直被列为富营养化与高浮游植物生物量。湖泊修复研究的一个可能方向是研究如何将目前的浑浊状态转变为主要由淹没的原生植被组成的清澈的水体系统。这样一个大型植物为基础的环境可能有助于维持本地幼鱼的发展和招聘，也提供了一个更多样化的功能栖息地的鱼类组合，有重叠的营养生态位。
In this paper, we aimed to contribute to the conservation research of a heavily impacted tropical lake ecosystem by characterizing its previously undescribed fish diversity and also elucidating the trophic structure of its fish community. Our study area is Lake Sampaloc, a small crater lake in the southern region of Luzon Island, Philippines. This lake has been heavily used for economic resource functions, such as aquaculture, for decades. Hindrances to the effective implementation of regulatory provisions have produced detrimental ecological effects on the lake, which has recently been declared as “Threatened Lake of the Year 2014”. We employed several sporadic fish surveys during a span of two years (2012 to 2014) to identify fishes in the lake. We also used stable isotope analysis to elucidate the trophic level and production reliance of important aquatic consumers. We discovered that the lake fish populations are heavily reliant on periphyton production and are mostly composed of non-native and potentially established invasive fish species. In addition, trophic niche overlaps are observed among non-native fish and native species. For the past three decades, Lake Sampaloc has been classified as eutrophic with high phytoplankton standing biomass. A possible direction for lake rehabilitation research is to investigate ways to change the present turbid state into a clear water system that is predominantly composed of submerged native vegetation. Such a macrophyte-based environment may help sustain the development and recruitment of native juvenile fish and also provide a more diverse functional habitat for fish assemblages that have overlapping trophic niches.