Climatic conditions affect the distribution of wildlife but also, inevitably, have an impact on plants. The field of archaeobotany covers several specialties (palynology, anthracology) that focus on the interactions between human societies and the plant world based on microscopic and macroscopic vestiges. Unlike cave palynology, which is the source of significant taphonomic problems, marine palynology has the advantage of rapid sedimentation and better registering of phenomena. Studying pollens also allows scientists to compare changes in vegetation with climate indicators. During the Middle Magdalenian, the flora consisted of a sagebrush steppe and grasses (Poaceae) and few trees (fig.). Pine was the dominant tree but its abundance varied depending on the sector. Plant consumption by human groups during the Palaeolithic is difficult to prove. Ultimately, abundant animal remains are the source of our knowledge of the natural resources for the period.