ارزیابی پولی شکارچیان طبیعی برای کنترل آفات بیولوژیکی در تولید گلابی

Results indicate that the loss of three predators could decrease net farm income with 88.86 € ha− 1 to 2186.5 € ha− 1. For the pear production sector in Flanders in 2011, this constitutes to an indirect use value of 0,68 million € for one predator and 16.63 million € for the presence of three predators. The aim is to provide a justification for the argument for biodiversity conservation, based on the ecological function of species, through the delivery of comparable monetary standards.