Human landscapes and climate change during the Holocene

Abstract

Palaeoecological and archaeobotanical studies of past environments are essential for understanding the kinds of natural settings in which agriculture and prehistoric societies evolved. They increase our knowledge of how human activities have changed environment and vice versa. Human impact on vegetation cover was recognised from the beginning of modern palynological research (Firbas 1937; Iversen 1941). Based on plant communities described from traditional agriculture and the evidence from archaeobotanical records, Behre (1981) identified palynological anthropogenic indicators. They comprise pollen of cultivated plants together with their associated arable weeds and ruderals. These indicators have been widely used and adapted in different European regions (e.g. Rosch 1996; Brun 2011) and the Near East (e.g. Behre 1990). Apart from reconstructing the vegetation dynamics caused by humans, current palynological research attempts to identify the spatial scale and variation of human activities, and their precise duration and location in given landscapes. Recent advances in quantification and numerical analyses of pollen data including climate reconstruction and vegetation/land-cover modelling, which allow for more precise estimates of the opening of woodlands in past times as well as simulating possible scenarios of human impact on the vegetation and landscapes (e.g. Gaillard et al. 2008). With these methodologies, past and future anthropogenic land cover change can be explored (Gaillard et al. 2010). However, until now most applications of these approaches have mainly concentrated on northwestern Europe. Extending them to further regions would be of great interest. Numerical analyses are of increasing importance for estimating human impact on vegetation and to allow disentangling the human and climatically induced vegetation changes in some cases (Feurdean et al. 2010; Bakker et al. 2012). Climate models can be used for the interpretation of human–environment interactions (e.g. Riehl et al. 2009). However, climatic changes of the last millennia are usually too small in amplitude to be detected by most of the quantitative climate reconstructions using pollen data (Kuhl et al. 2010). Also, microand macro-charcoal records in palaeoecological and archaeobotanical studies serving as climate and human indicators are becoming increasingly relevant (Carcaillet et al. 2002). Investigations of charcoal in soil have focussed on the tropics, the boreal zone and around the Mediterranean, however recently the temperate zone has been integrated as well. In addition, on-site wood charcoal analyses can contribute to reconstructing the human impact on vegetation, especially in areas where no suitable pollen archives are available near human occupation sites (Riehl and Marinova 2008). E. Marinova (&) Centre for Archaeological Sciences, University of Leuven, Celestijnenlaan 200E, bus 2408, 3001 Leuven, Belgium e-mail: elena.marinova@bio.kuleuven.be