Boris (given name) Boris, Borys or Barys (Bulgarian, Russian, Serbian, Ukrainian: Ð±Ð¾ÑÐ¸Ñ; Belarusian: Ð±Ð°ÑÑÑ) is a male name of Bulgarian origin. Nowadays, it is most widely represented in Russia, Belarus, Bosnia and Herzegovina, Bulgaria, Croatia, Republic of Macedonia, Poland, Montenegro, Serbia, Slovakia, Slovenia, and Ukraine.
A trophic level refers to a level or a position in a food chain or ecological pyramid. It is occupied by a group of organisms that have a similar feeding mode. At the base of an ecological pyramid is trophic level 1. A food chain would start as well at trophic level 1. The trophic level 1 is occupied by the primary producers (e.g. plants).
Wiktionary (0.00 / 0 votes) Rate this definition: troposphere (Noun). The lower levels of the atmosphere extending from the earth's surface up to the tropopause. It is characterized by convective air movements and a large vertical temperature change.he average depth of the troposphere is approximately 17 km in the middle latitudes. It is deeper in the tropics, up to 20 km, and shallower near the polar regions, at 7 km in summer, and indistinct in winter.