Sacred natural sites (SNS) are found all over the world. They are thought to play an important role in conservation but until recently there was little systematic investigation of this claim. Now, new research published in the journal Biological Conservation by an international and multidisciplinary team, led by the University of Ioannina, has shown that there is a notable conservation benefit to SNS. The researchers of the project, known as THALIS-SAGE, chose for their study the region of Epirus, in north-western Greece, that is host to numerous sacred groves protected through religion for several hundred years.
By studying a wide range of plant and animal taxonomic groups in eight sacred natural sites and comparing their diversity with nearby control sites, mostly reforested areas, the researchers found that the SNS have a small but persistent biodiversity advantage. This advantage is expressed in a number of ways, the most clear indication being the existence of more distinct species assemblages amongst the sacred groves than amongst control sites (a measure called beta diversity). It is often asserted that the conservation benefits of SNS are marginal owing to their usually-small sizes. However, this study finds the influence of size to be relatively weak and shows that even small SNS can play a considerable role in biodiversity conservation.
Caption 1: ‘Our Lady of the Nightingales’ – the sacred forest of Panagia Aidonolaloussa. Branches, roots and holes of giant old oaks, Judas-trees, mahaleb cherries and hornbeams bring a Tolkienesque air to this ancient woodland. (Photo©K. Stara)
Despite their role in conserving biodiversity, the SNS of Epirus are now themselves endangered. This is due to changing demographics and land use, primarily through rural depopulation in most mountainous areas of Epirus since WW2. Given in addition changing lifestyles, it is difficult for local communities to continue to enforce the rules, which used to protect their SNS as locally adapted management systems. For this reason, the THALIS-SAGE project also included initiatives for the promotion of their cultural and educational value. Project leader, Professor John Halley, thinks that “the best conservation strategy for these and other SNS of similar sizes worldwide is to link them in networks within conventional conservation schemes”. Adds project researcher, Dr. Kalliopi Stara, “this needs to be done in collaboration with local communities”.
Caption 2: The carved cross in the trunk of this oak tree is a recent offering from a young shepherd to Saint Nikolas, patron of the church in Vitsa’s sacred forest. The church celebrates on the 20th of May. After the service and festivities, grazing used to be permitted in the pasture for the village livestock. Today only two shepherds still tend their flocks there. (Photo©K. Stara)
Link to the paper: https://www.sciencedirect.com/science/article/pii/S0006320717321183
A similar (less academic) article is available here: https://theconversation.com/sacred-sites-have-a-biodiversity-advantage-that-could-help-world-conservation-95599
Contact for further details/interviews, etc.:
John M Halley 6944-328099 jhalley@cc.uoi.gr
Kalliopi Stara 6956-155961 kstara@cc.uoi.gr
