The spatial and seasonal variations in resource use of the lacustrine shrimp Palaemon paucidens were investigated in three different Korean lagoon systems in June and October 2018 by measuring their carbon and nitrogen stable isotope ratios. P. paucidens had much higher δ¹³C values at the permanently open lagoon (PL) as compared to the intermittently open lagoons (ILs), revealing a disparity in resource utilization. Isotopic niches of the shrimp were relatively wider at the PL than at the ILs, suggesting a greater diversity of carbon pathways in the PL system. These results indicate that the degree of water exchange with the sea, associated with lagoon geomorphology, may be a major factor influencing resource availability for P. paucidens. Our findings suggest that the duration and degree of inlet opening may affect dietary variation at the population level, and may be one of the key components of sustainable management for coastal lagoon ecosystems.

2018年6月和2018年10月，在三个不同的韩国泻湖系统中，通过测量湖虾虾Palaemon paucidens的资源利用的空间和季节变化，通过测量其碳和氮稳定同位素比。P。paucidens有更高的δ ¹³相比于间歇地打开泻湖（ILS），揭示了在资源利用的视差在永久开放泻湖（PL）C的值。虾的同位素生态位在PL处比在IL处相对较宽，表明PL系统中碳途径的多样性更大。这些结果表明，与海水交换的程度（与泻湖地貌有关）可能是影响淡水湖资源利用的主要因素。P。paucidens。我们的发现表明，进水口开放的持续时间和程度可能会影响种群水平上的饮食变化，并且可能是沿海泻湖生态系统可持续管理的关键组成部分之一。