Pontocaspian ecosystems have deteriorated due to increasing anthropogenic pressures, including shipping activities. We studied the relationships between sedimentology, environmental and shipping variables, and the dinocyst distribution and abundance across the Pontocaspian region. Cyst diversity was characterized by the presence of 36 dinocyst morphotypes. Western Black Sea assemblages were dominated by Lingulodinium machaerophorum and Round brown cysts reaching values of 60% and 31.6% respectively. Lingulodinium machaerophorum, Impagidinium caspienense and Round brown cysts dominate the Caspian Sea assemblages with relative abundances of 80, 68 and 52%, respectively. Temperature, salinity and primary productivity are the main drivers for dinocyst distribution and species assemblages. Temperature controls the distribution and relative abundance of the potentially toxic species L. machaerophorum. Dinocysts assemblages reflect enriched-nutrient conditions in the North Caspian Sea and the Western Black Sea. Distance from the harbour correlates with dinocyst assemblages in the North and Middle Caspian Sea. This is likely to be related to the high shipping activities.

由于人为压力（包括运输活动）的增加，庞加索比亚的生态系统已经恶化。我们研究了蓬头孢地区的沉积学，环境和运输变量与恐龙囊分布和丰度之间的关系。囊肿多样性的特征是存在36个囊藻形态型。西部黑海组合主要由灵芝和金黄色的囊肿组成，分别达到60％和31.6％。Lingulodinium machaerophorum，Impagidinium caspienense圆形囊肿和圆形棕色囊肿分别以80％，68％和52％的相对丰度占据里海组合。温度，盐度和初级生产力是藻囊分布和物种集合的主要驱动力。温度控制着潜在毒性物种马氏乳杆菌的分布和相对丰度。藻囊组合反映了北里海和西黑海的营养丰富状况。距港口的距离与里海北部和中部的恐龙囊组合有关。这很可能与高运输活动有关。