The understanding of the processes that regulates the distribution of the resident macroinfauna on sandy beaches is an urgent need at the current global change scenario. Here, we examine whether the spatial-temporal distribution of the burrowing shrimp Callichirus major (Callichiridae) is affected by the climatic and tidal regimes in two sandy beaches of Brazil (José de Menino and Itaguaré), where is totally prohibited the capture of this species. To this end, we counted shrimp burrows across transects plotted perpendicular to the water line. We found that C. major had a non-random pattern of distribution with dense aggregations of burrows near to the low-tide line. Burrow density and distribution of C. major did not differ across the annual cycle, not following the remarkably environmental seasonality of the southeastern region of Brazil. However, both population parameters were adversely affected when C. major was subject to a high tidal variability. Also, the probability of C. major builds a gallery in intertidal habitats is greater on beaches with very fine sand and low variability of tide amplitude than on beaches with coarser sediments and greater tidal dynamics. Our results point to survival of C. major is not seriously compromised by temperature and precipitation variations, but rather by eventual changes in the tidal regime and sediments. Considering the current scenario of climate change, we argue in favor of C. major may be a good biological model to assess the potential impact of tidal flooding connected to the sea level rise and erosion on coastal habitats.

在当前的全球变化形势下，迫切需要了解调节沙滩上常驻大型动物的分布的过程。在这里，我们检查了巴西两个沙滩（何塞·德·梅尼诺和伊塔瓜雷）的穴居虾Callichirus major（Callichiridae）的时空分布是否受到气候和潮汐制度的影响，在该处完全禁止捕捞该物种。为此，我们计算了垂直于水线绘制的横断面的虾洞。我们发现大孢梭菌具有非随机的分布模式，在低潮线附近有密集的洞穴聚集。洞穴密度和分布C.主要在整个年度周期中没有变化，没有遵循巴西东南部地区明显的环境季节性。但是，当C. major潮汐变化较大时，这两个种群参数都会受到不利影响。此外，概率C.主要建立在潮间带栖息地画廊是更大的海滩，那里有很细的沙子和潮汐幅度比用粗糙的沉积物和更大的潮汐动力海滩的低可变性。我们的研究结果指向的生存C.主要是没有认真温度和降水的变化妥协，而是由潮汐规律和沉积物中可能的变化。考虑到当前的气候变化情况，我们主张采用C. Major 可能是一个很好的生物学模型，用于评估与海平面上升和侵蚀有关的潮汐洪水对沿海生境的潜在影响。