Tracking fire activity and post-fire limnological responses using the varved sedimentary sequence of Lake Jaczno, Poland

Long-term paleofire perspectives provide key information on natural and human-derived land cover changes. The last few millennia are crucial to understanding the future of wildfire threats, since increasing global temperatures expected have an impact regions previously assumed not be endangered. In this study we investigate interplay between changing climatic conditions, transformation, fires, human activity based first 1750-year-long macrocharcoal record derived from varved sediments Lake Jaczno, located in northeast Poland. is supported by morphotype analysis, pollen historical data, statistical which revealed that vicinity lake both low- high-intensity fires may occurred. Most them were set humans, but some periods biomass burning was favored droughts or even causes (i.e. lightning). Human-induced especially evident AD 1081 1283. This period corresponds peak Jatvings tribe region related deforestation for agrarian purposes. Fire combined with area impacted limnological processes primary productivity shifts water mixing regime.