Nutrient and phytoplankton dynamics in a sewage-impacted Gulf coast estuary: A field test of the PEG-model and equilibrium resource competition theory
Nutrient and phytoplankton dynamics in a sewage-impacted Gulf coast estuary: A field test of the PEG-model and equilibrium resource competition theory
复制标题
受污水影响的墨西哥湾沿岸河口的营养物和浮游植物动态：PEG 模型和平衡资源竞争理论的现场测试
DOI：
10.2307/1352247
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
P. Eldridge
中科院分区：
文献类型：
--
作者：
D. Roelke;Luis A. Cifuentes;P. Eldridge
随着人类活动的增加，富营养化和有毒水华事件变得越来越普遍。为了减少生态破坏，有必要制定旨在促进有益藻类生长的浮游植物管理方案。这种管理方案的成功取决于目标系统内浮游植物演替对可控扰动的可预测性。淡水湖泊似乎表现出一定程度的可预测性，正如peg模型和均衡资源竞争理论所描述的那样。我们调查了这些概念是否可以应用于海洋系统，Nueces河河口，德克萨斯州。peg模型很好地预测了在有利的营养扰动后可食用浮游植物形式的初始发生。然而，平衡资源竞争理论仅成功地预测了营养扰动后主要浮游植物分类群的立即发生。系统范围内氮磷与蓝藻、绿藻和硅藻的相关性较差。在纽埃塞斯河河口，浮游植物群落的演替对养分扰动表现出一定程度的可预测性。因此，对浮游植物群落组成进行管理是可能的。peg模型对浮游植物管理方案似乎是一个有用的指导，而平衡资源竞争的效用可能是有限的。
Eutrophication and noxious bloom events are becoming more prevalent with increasing anthropogenic activities. To lessen ecological damage, there is a need to develop phytoplankton management programs aimed at enhancing growth of beneficial algae. The success of such management schemes with be dependent on the predictability of phytoplankton succession within the target system to a controlled perturbation. Freshwater lakes appear to exhibit a degree of predictability as described by the PEG-model and Equilibrium Resource Competition theory. We investigated whether these concepts could be applied to a marine system, the Nueces River estuary, Texas. The PEG-model predicted nicely the initial occurrence of edible phytoplankton forms after a favorable nutrient perturbation. Equilibrium Resource Competition theory, however, only successfully predicted the occurrence of major phytoplankton taxa immediately after a nutrient perturbation. Systemwide correlations between N:P and cyanobacteria, green algae, and diatoms were poor. In the Nueces River estuary, succession within the phytoplankton community showed a degree of predictability to nutrient perturbations. Therefore, management of the phytoplankton community composition may be possible. The PEG-model appears to be a useful guide for a phytoplankton management scheme, while the utility of Equilibrium Resource Competition may be limited.