Ocypodid crabs are important components of sandy beach ecosystems and potential indicators of environmental stress. This is the first study about Ocypode quadrata population on an equatorial, macrotidal, high-energy dissipative beach, located in the Amazon coast. The steady temperature and marked hydrological seasons in this region, along with a wide supralittoral extension, provide exceptional conditions for assessing the effect of rainfall on population structure and across shore distribution. Additionally, von Bertalanffy growth parameters were estimated in order to compare with other studied populations of this crab at higher latitudes (subtropical beaches). Burrow abundance had marked differences between the two hydrological seasons in the Amazon coast, with higher values related to higher rainfall. A bimodal burrow zonation was observed, with a significant relationship between burrow abundance and depth, which shows that burrows are generally less abundant and deeper under drier conditions. Growth parameters were similar to those on some subtropical areas, as opposed to some global, expected ecological trends. Large beach width and local climate were important factors to identify clear population trends, which implies that moisture affects the use of the space by these individuals.

拟蟹是沙滩生态系统的重要组成部分，也是环境压力的潜在指标。这是关于四瓣O的第一项研究位于亚马逊海岸的赤道，大潮汐，高能耗散海滩上的人口。该地区的稳定温度和明显的水文季节以及沿岸上的广泛扩展，为评估降雨对人口结构和整个海岸分布的影响提供了特殊条件。此外，估算了冯·贝塔兰菲的生长参数，以便与该纬度较高的地区（亚热带海滩）该螃蟹的其他研究种群进行比较。亚马逊河沿岸两个水文季节之间的洞穴丰度存在明显差异，较高的值与较高的降雨有关。观察到一个双峰洞穴地带，在洞穴丰度与深度之间存在显着的关系，这表明在干燥的条件下，洞穴通常不那么丰富，而且深度更深。生长参数与某些亚热带地区的参数相似，与某些全球预期的生态趋势相反。宽阔的海滩和当地的气候是确定明显的人口趋势的重要因素，这意味着水分会影响这些人对空间的利用。