A hypothetical community on a barren mid-Atlantic island consists of two fish-eating seabirds (the booby and the noddy), the fungi and microorganisms that live on the birds' dung, a tick that feeds on these two birds, a cactus, a moth that feeds on cast-off feathers, a beetle that lives on dung organisms, and spiders that eat the other arthropods. There are no other plants and no lichens. Which pair of organism and trophic structure is incorrect?
◦ cactus—producer
◦ fungi—detritivores
◦ booby—primary consumer
◦ moth—detritivore