John Wiley & Sons, Ltd.

Effects of temperature and copper pollution on soil community – extreme temperature events can lead to community extinction

0
Global warming affects ecosystems and species' diversity. The physiology of individual species is highly influenced by changes in temperature. Effects on species communities are less studied, and virtually unknown when combining effects of pollution and temperature. To assess the effects of temperature and pollution in the soil community, a 2‐factorial soil mesocosms multispecies experiment was performed. Three exposure periods (28, 61 and 84 days) and four temperatures (19, 23, 26 and 29 °C) were tested, resembling the mean annual values for southern Europe countries and extreme events. The soil used was from a field site, clean or spiked with Cu (100 mg Cu/kg). Results showed clear differences between 29 °C treatment and all other temperature treatments, with a decrease in overall abundance of organisms, further potentiated by the increase in exposure time. Folsomia candida was the most abundant species and Enchytraeus crypticus was the most sensitive to Cu toxicity. Differences in species optimum temperatures were adequately covered, e.g. 19 °C for Hypoaspis aculeifer or 26 °C for E. crypticus. The longer the exposure time duration the more pronounced were the temperature effects. Feeding activity decreased with higher temperature and exposure time, following the decrease in invertebrate abundance, while for the same conditions the organic matter turnover increased. Hence, negative impacts on ecosystem services due to temperature increase can be expected by changes on soil function and as consequence of biodiversity loss. Environ Toxicol Chem © 2013 SETAC

Customer comments

No comments were found for Effects of temperature and copper pollution on soil community – extreme temperature events can lead to community extinction. Be the first to comment!