Carretas-Pereyra is an estuarine lagoon system located in the southern Mexican Pacific coast. Its connection to the sea is intermittent, because the mouth of the system closes seasonally under natural conditions, but it is often opened artificially for artisanal fishery purposes. In order to know the degree of development, structure, and functioning of this system, under intermittent communication with the sea, a trophic model was built using software Ecopath. The model was composed of 32 functional groups: one for birds, one for crocodylians, 18 for fishes, 9 invertebrates, 2 plankton, and detritus. The pedigree index of the model was 0.62, which mean it is an acceptable model. The results are consistent with findings for lagoon systems with permanent connection to the sea. Some of the ecosystemic mechanisms probably used to face the abrupt changes induced by the opening of a sea inlet are: system omnivory, elevated overhead, efficient metabolism in phytoplankton, species replacement, and species adaptability to dominant environmental conditions. These elements provide stability to the ecosystem and help in its recovery. Detritus, zooplankton, and phytoplankton were important components for the resiliency of the system. In spite of the biological and environmental changes induced by the intermittent opening of an inlet, Carretas-Pereyra has the necessary elements to absorb the impacts and function adequately.

Carretas-Pereyra是位于墨西哥太平洋南部海岸的河口泻湖系统。它与大海的连接是断断续续的，因为该系统的嘴在自然条件下会季节性关闭，但通常是为人工捕鱼而人为打开的。为了了解该系统的开发，结构和功能的程度，在与海进行间歇性通信的情况下，使用软件Ecopath建立了一个营养模型。该模型由32个功能组组成：一个组用于鸟类，一个组用于鳄鱼，18个用于鱼类，9个无脊椎动物，2个浮游生物和碎屑。该模型的谱系指数为0.62，这表明它是可以接受的模型。结果与永久连接到海洋的泻湖系统的发现是一致的。一些可能用来应对因海口打开而引起的突然变化的生态系统机制包括：系统杂食性，高架空，浮游植物的有效代谢，物种替代以及物种对主要环境条件的适应性。这些元素为生态系统提供了稳定性，并有助于其恢复。碎屑，浮游动物和浮游植物是系统弹性的重要组成部分。尽管进水口的间歇打开会引起生物和环境变化，但Carretas-Pereyra具有必要的元素来吸收冲击并充分发挥作用。这些元素为生态系统提供了稳定性，并有助于其恢复。碎屑，浮游动物和浮游植物是系统弹性的重要组成部分。尽管进水口的间歇打开会引起生物和环境变化，但Carretas-Pereyra具有必要的元素来吸收冲击并充分发挥作用。这些元素为生态系统提供了稳定性，并有助于其恢复。碎屑，浮游动物和浮游植物是系统弹性的重要组成部分。尽管进水口的间歇打开会引起生物和环境变化，但Carretas-Pereyra具有必要的元素来吸收冲击并充分发挥作用。