The aim of this study was to identify the patterns of short and medium term variations in fish and macroinvertebrate communities in five sandy beach surf zones on the Cádiz coast (southwest Spain). Sampling was done monthly (December 2016 to November 2017) with a beach seine net with a 5 m long purse-bag at its center. A total of 48 different species were identified, of which fish and crustaceans were the most abundant groups. General patterns indicated that warm periods showed higher levels of abundance and species richness than colder periods, and the community's biomass increased at sunset as opposed to sunrise, however, this was not the case for species richness or abundance. The type of beach, on the other hand, had no significant effects. The analysis of abundance by taxa indicated that the most significant responses to the beach, season, time of day, and moon-phase predictors were by the species Trachinotus ovatus, Haplostylus normani, and Crangon crangon. In addition, water temperature together with wave height were the most determining factors affecting the abundance of the most dominant species in the community. Furthermore, our research suggests that sandy beach surf zones are used as a nursery by fish species and that these environments are where short and mid-term spatial-temporal variations of the community's structure occur.

这项研究的目的是确定加的斯海岸（西班牙西南部）的五个沙滩冲浪带中鱼类和大型无脊椎动物群落的短期和中期变化模式。每月（2016年12月至2017年11月）使用海滩围网进行采样，中心围网长5 m。总共鉴定出48种不同的物种，其中鱼类和甲壳类是最丰富的物种。一般模式表明，温暖的时期比寒冷的时期显示出更高的丰度和物种丰富度，并且与日出相比，日落时社区的生物量增加了，但是物种丰富度或丰度却不是这样。另一方面，海滩类型没有明显影响。通过分类单元进行的丰度分析表明，对海滩，季节，卵形曲霉，诺普单倍体和Crangon crangon。此外，水温和波高是影响群落中最主要物种的丰度的最决定性因素。此外，我们的研究表明，沙滩冲浪区被鱼类用作苗圃，这些环境是群落结构发生短期和中期时空变化的地方。