primary vegetation — pirminė augalija statusas T sritis ekologija ir aplinkotyra apibrėžtis Per evoliuciją susiformavusi augalija, esanti dinaminėje pusiausvyroje ir nepažeista žmogaus veiklos ir gaivalinių nelaimių. atitikmenys: angl. primary plants; primary… … Ekologijos terminų aiškinamasis žodynas
Primary succession — is one of two types of ecological succession and biological succession of plant life, and occurs in an environment in which new substrate, devoid of vegetation and usually lacking soil, is deposited (for example a lava flow). (The other type of… … Wikipedia
Primary producers — are those organisms in an ecosystem that produce biomass from inorganic compounds (autotrophs). In almost all cases these are photosynthetically active organisms (plants, cyanobacteria and a number of other unicellular organisms; see article on… … Wikipedia
Primary production — For other uses, see Primary production (economics). Global oceanic and terrestrial photoautotroph abundance, from September 1997 to August 2000. As an estimate of autotroph biomass, it is only a rough indicator of primary production potential,… … Wikipedia
Primary School Leaving Examination — The Primary School Leaving Examination (PSLE) is a national examination taken by all students in Singapore near the end of their sixth year in primary school, which is also their last year in primary school before they leave for secondary school … Wikipedia
Primary root — Root Root, n. [Icel. r[=o]t (for vr[=o]t); akin to E. wort, and perhaps to root to turn up the earth. See {Wort}.] 1. (Bot.) (a) The underground portion of a plant, whether a true root or a tuber, a bulb or rootstock, as in the potato, the onion … The Collaborative International Dictionary of English
primary — I. adjective Etymology: Middle English, from Late Latin primarius basic, primary, from Latin, principal, from primus Date: 15th century 1. first in order of time or development ; primitive < the primary stage of civilization > < the primary… … New Collegiate Dictionary
Primary nutritional groups — An organism may be placed into one each of the three pairs of major nutritional groups based on their carbon, energy, and electron sources.*Carbon source refers to the source of carbon used by an organism for growth and development. An organism… … Wikipedia
Primary energy consumption — Consumption of primary energy. (Energy sources that are produced from other energy sources, e.g., coal coke from coal, are included in primary energy consumption only if their energy content has not already been included as part of the original … Energy terms
primary consumer — noun : a plant eating organism : herbivore * * * primary consumer, Ecology. an animal in a food chain, such as a rabbit or deer, that eats grass and other green plants … Useful english dictionary
