An apex predator, also known as an alpha predator or top predator, is a predator residing at the top of a food chain upon which no other creatures prey.[n 1] Apex predators are usually defined in terms of trophic dynamics, meaning that they occupy the highest trophic levels and serve as keystone species, vital to their ecosystems. One study of marine food webs defined apex predators as those feeding at trophic levels above four. The apex predator concept is commonly applied in wildlife managemen
Ab. Definitions: 1. Abbreviation for antibody. The definition information for Ab is provided by Stedman's. You can search our medical dictionary here. Stedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students.Medical Dictionary Copyright Â© 2006 Lippincott Williams & Wilkins.tedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students. Medical Dictionary Copyright Â© 2006 Lippincott Williams & Wilkins.
As a prefix, ab- is used to mean away from or off, from the Latin word ab meaning away from. For example, the word abnormal is used to denote something which â¦ is outside or away from the realm of normalness. 14 people found this useful.