Shifts in host–parasitoid networks across community garden management and urban landscape gradients

Urban Farm DB summary

Using ecological networks, this study quantified interactions between herbivorous insects and their parasitoids across 22 urban community gardens on the Central Coast of California, relating host abundance, parasitism rates, and network structure to local garden management and surrounding landscape composition. It found that both local management and landscape composition influenced parasitism, while only local factors affected host abundance and network structure, suggesting local garden management decisions may shift host–parasitoid network structure with variable outcomes for biological pest control.