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.
E.encyclopedia NATURE. Frogs, toads, salamanders, newts, and the strange, wormlike caecilians are all amphibiansâa group of small, generally moist-skinned vertebrates. The word amphibian, meaning âliving two lives,â refers to the fact that most amphibians spend part of their lives in water and part on land.any young amphibians also have feathery gills to extract oxygen from water, but later lose these and develop lungs. Some axolotl salamanders keep their gills throughout life. Newts and salamanders have long tails and lizardlike bodies. They feed on slugs, insects, and other small animals.