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Red-backed Salamanders (Plethodon cinereus) are widely used as a biological indicator of terrestrial ecosystem health in North America due to their large range, potentially high biomass and large influence on ecosystem regulation. Monitoring projects often overlook the potential influence of intraspecific interactions and how Red-backed Salamander (RBS) abundance and demographics can be affected by symbiotic relationships. The adult to juvenile ratio was explored in relation to presence of ants, tunneling, number of small and large burrows. It was found that between 2011-2015 there was a significant increase in small and large burrows. It was found that ants, small burrows and large burrows were significantly related to both maximum salamander counts and adult-juvenile ratios. The relationship between both abundance and demographics with ants showed a negative relationship, while small and large burrows had a positive relationship. Tunneling was found to have no statistical significance (Table 1, Table 2). These results highlight the importance of considering biotic interactions when analyzing indicator species populations. Future steps should include determining how both biotic and abiotic properties interact to influence RBS populations and determining what type of interspecific interactions are occurring under cover boards via controlled experiments. Les salamandres cendrees (Plethodon cinereus) sont largement utilisees comme des indicateurs biologiques de la sante des ecosystemes terrestres en Amerique du Nord, en raison de leur portee vaste, de leur biomasse potentiellement elevee et de leur influence importante au niveau de la regulation des ecosystemes. Les projets de surveillance negligent souvent l’influence potentielle des interactions intraspecifiques, ainsi que la facon dont les relations symbiotiques peuvent affecter l’abondance et la demographie de la salamandre cendree (SC). L’abondance de la SC et le rapport entre le nombre d’adultes et de jeunes ont ete explores en relation avec la presence de fourmis, de leurs tunnels et du nombre de petits et grands terriers. On a determine qu’entre 2011 et 2015, il y a eu une augmentation importante du nombre de petits et grands terriers et que la presence de fourmis, de petits et grands terriers etait fortement liee au nombre maximal de salamandres et aux rapports adultes-jeunes. Les rapports trouves entre la presence de fourmis, l’abondance de la SC et la demographie de l’espece ont presente une correlation negative, alors que la presence de petits et grands terriers a presente une correlation positive. L’excavation des tunnels n’avait pas d’importance statistique (Tableau 1, tableau 2). Ces resultats soulignent l’importance de considerer les interactions biotiques lors de l’analyse des populations d’especes indicatrices. Les prochaines etapes devraient inclure l’identification de la facon dont les proprietes biotiques et abiotiques interagissent pour influencer les populations de la SC et de determiner quels types d’interactions interspecifiques se produisent sous le couvert des experiences controlees.

canadian young scientist journal

The influence of non-salamander heterospecifics on the demography and abundance of Red-Backed Salamanders (Plethodon cinereus) in the Credit River Watershed