Fossil pollen analyzes include research of pollen grains from various environments such as lake sediments, peatland, river and marine sediments, glaciers, lignite and coal. Lakes are one of the important data sources for Quaternary palynological studies. Akgol, which is selected as a research area, is located in Golkent district of the Ferizli township in the provincial city of Sakarya. Its surface area is 3.5 km2 and its maximum depth is 8 meters. The aim of this study was to investigate vegetation changes around Akgol in the last 1000 years using fossil pollen analysis in the bottom sediments of the lake. The Piston corer of ITU EMCOL Research Centre was used for recovering sediment cores from Akgol. Sediment samples of 2 cm3 were collected every 5 centimeters on one of the cores at the Palynology Laboratory of IUC. Fossil pollen analysis was performed according to the “classical method”. The pollen percentage values were calculated for each plant taxa and relative abundance graphs were plotted in the TILIA program. According to preliminary results of the pollen diagram; deciduous forest vegetation has been predominant in the last 1000 years around Akgol. Maritime pine was introduced into this natural forest by plantation in the recent years.

中文翻译：

---

Akgöl'de (Sakarya) Fosil Polen Analizine Dayalı Paleovejetasyon Araştırmaları: İlk Bulgular

花粉化石分析包括对湖泊沉积物、泥炭地、河流和海洋沉积物、冰川、褐煤和煤炭等各种环境中的花粉粒的研究。湖泊是第四纪孢粉学研究的重要数据来源之一。被选为研究区的 Akgol 位于萨卡里亚省市 Ferizli 镇的 Golkent 区。其表面积为3.5平方公里，最大深度为8米。本研究的目的是使用湖底沉积物中的化石花粉分析来调查过去 1000 年来阿克戈尔周围植被的变化。ITU EMCOL 研究中心的活塞取芯器用于从 Akgol 中回收沉积物岩心。在 IUC 孢粉学实验室的一个岩心上每 5 厘米收集 2 cm3 的沉积物样品。根据“经典方法”进行化石花粉分析。计算每个植物分类群的花粉百分比值，并在 TILIA 程序中绘制相对丰度图。根据花粉图的初步结果；在过去的 1000 年中，Akgol 周围的落叶林植被占主导地位。近年来，海松通过人工林引入这片天然林中。