The Producer Price Index (PPI) program measures the average change over time in the selling prices received by domestic producers for their output. The prices included in the PPI are from the first commercial transaction for many products and some services.
Amphipods can thrive in marine settings and on moist land. Other species are found in home gardens and beneath flowerpots. Some amphipods are herbivores, while others are carnivores. Sand-, mud-and moist-soil-dwelling amphipods feed on bacteria.Other species are scavengers that feed on dead plants and animals.ehavior, Diet & Habits. All amphipod species prefer moist habitats. Amphipods that live in water are primarily white, although some may also exhibit light brown, green, dark brown or black coloration. Most amphipods become red in color when they die.
Terrestrial isopods are small crustaceans that live on land and are related to shrimp and lobster (see Figure 1). The common names of terrestrial isopods include roly poly, sow bug, and pill bug, among many others.They are detritivores, which means they primarily eat dead plants and dead animals. In the process of eating these organic materials, they also consume bacteria and fungi that are on or in these dead organisms.he common names of terrestrial isopods include roly poly, sow bug, and pill bug, among many others. They are detritivores, which means they primarily eat dead plants and dead animals. In the process of eating these organic materials, they also consume bacteria and fungi that are on or in these dead organisms.