Trophic-level
noun, Ecology.
1.
any class of organisms that occupy the same position in a food chain, as primary consumers, secondary consumers, and tertiary consumers.
trophic level
Any of the sequential stages in a food chain, occupied by producers at the bottom and in turn by primary, secondary, and tertiary consumers. Decomposers (detritivores) are sometimes considered to occupy their own trophic level. ◇ The rate at which energy is transferred from one trophic level to the next is called the ecological efficiency. Consumers at each level convert an average of only about 10 percent of the chemical energy in their food to their own organic tissue. Since plants can only convert approximately 1 percent of incident sunlight into chemical energy at the lowest trophic level (the bottom of the food chain), the percentage of the energy in incident sunlight that reaches a tertiary consumer is about 0.0001.
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a foster-child, an Ephesian who accompanied Paul during a part of his third missionary journey (Acts 20:4; 21:29). He was with Paul in Jerusalem, and the Jews, supposing that the apostle had brought him with him into the temple, raised a tumult which resulted in Paul’s imprisonment. (See TEMPLE, HEROD’S ØT0003611.) In writing to Timothy, […]
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1. a combining form meaning “nourishment,” used in the formation of compound words: trophosome. combining form 1. indicating nourishment or nutrition: trophozoite tropho- or troph- pref. Nutrition; nutritive: trophoblast.
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noun, Embryology. 1. the layer of extraembryonic ectoderm that chiefly nourishes the embryo or develops into fetal membranes with nutritive functions. noun 1. the outer layer of cells of the embryo of placental mammals, which is attached to the uterus wall and absorbs nourishment from the uterine fluids trophoblast tro·pho·blast (trō’fə-blāst’) n. The outermost layer […]