Analyses of δ¹⁸O and δ¹³C of original shells of late Valanginian (verrucosum to triptychoides ammonite zones) ammonites preserved in clay at localities in central Poland, and of some Berriasian samples from well cores have been carried out for the first time. Analyses of carbon stable isotope composition have revealed diverse values, representing vital effects rather than recording the palaeoenvironment. In turn, analyses of oxygen stable isotope composition in samples from the verrucosum and triptychoides ammonite zones clearly indicates the connection between particular species and stable isotope ratios, and thus palaeotemperature. The interpretation of ammonite palaeoecology in the present paper is based on estimated palaeotemperatures and supports other interpretations of ammonite behaviour, mainly based on functional morphology of shells. There are two main groups of ammonites associated with lower and higher temperatures. The first group of δ¹⁸ O values indicates lower palaeotemperatures. Genera analysed include Bochianites, Dichotomites and Prodichotomites; a nekto-benthic (demersal) habitat is suggested for these. The second group, characterised by higher palaeotemperatures, includes Saynoceras, Valanginites and Olcostephanus, with a suggested nektonic (or planktic) habitat (free-floating), Neohoploceras and Neocomites with a suggested nektonic habitat (free-swimming) and a seasonal migration from warmer (Tethys) to cooler waters of the Polish Basin or lived in the Polish Basin for several summer and winter seasons. Co-occurring bivalves, echinoid spines and scaphopods were analysed for comparison with results obtained from ammonites for a better overview of the palaeoenvironment. The estimated palaeotemperatures for the Polish Basin are between 12 and 13 °C (at the sea floor) to 21–24 °C (in the upper water column), while for the Tethys or summer surface waters of the Polish basin, these were in the range of 26–30 °C.

δ ¹⁸ O 和 δ ^13的分析首次对波兰中部地区保存在粘土中的瓦兰吉尼晚期（verrucosum 到triptychoides ammonite 带）菊石的原始贝壳以及来自井芯的一些Berriasian 样品进行了研究。对碳稳定同位素组成的分析揭示了不同的值，代表了重要的影响，而不是记录古环境。反过来，对疣状和三联菊属菊石带样品中氧稳定同位素组成的分析清楚地表明了特定物种与稳定同位素比率之间的联系，从而表明古温度。本文对菊石古生态学的解释是基于估计的古温度，并支持对菊石行为的其他解释，主要基于贝壳的功能形态。有两组主要的菊石与较低和较高的温度有关。第一组δ¹⁸ O 值表明古温度较低。分析的属包括Bochianites、Dichotomites和Prodichotomites；建议为这些动物建立一个线栖底栖（底栖）栖息地。第二组，以较高的古温度为特征，包括Saynoceras、Valanginites和Olcostephanus，以及建议的内生（或浮游）栖息地（自由漂浮）、Neohoploceras和Neocomites具有建议的内生栖息地（自由游泳）和从较温暖（特提斯）到波兰盆地较冷水域的季节性迁移，或者在波兰盆地生活了几个夏季和冬季。对同时出现的双壳贝类、海胆棘和舟足类进行了分析，以便与从菊石中获得的结果进行比较，以便更好地了解古环境。波兰盆地的估计古温度在 12 至 13 °C（海底）至 21–24 °C（上层水柱）之间，而对于波兰盆地的特提斯或夏季地表水，这些温度在26-30°C 的范围。