Primary production | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-06

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Primary_production


00:00:58 1 Overview
00:02:42 2 Gross primary production and net primary production
00:04:24 3 Terrestrial production
00:06:37 4 Oceanic production
00:09:11 4.1 Light
00:11:37 4.2 Nutrients
00:13:02 4.3 Iron
00:14:15 5 Measurement
00:15:48 5.1 Terrestrial
00:17:40 5.1.1 Grasslands
00:18:47 5.1.2 Forests
00:19:25 5.2 Aquatic
00:23:57 5.3 Global
00:26:13 5.4 Estimates
00:26:38 6 Primary production and plant biomass for the Earth
00:27:01 7 Human impact and appropriation
00:29:24 8 See also



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SUMMARY
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In ecology, primary production is the synthesis of organic compounds from atmospheric or aqueous carbon dioxide.  It principally occurs through the process of photosynthesis, which uses light as its source of energy, but it also occurs through chemosynthesis, which uses the oxidation or reduction of inorganic chemical compounds as its source of energy.  Almost all life on Earth relies directly or indirectly on primary production. The organisms responsible for primary production are known as primary producers or autotrophs, and form the base of the food chain. In terrestrial ecoregions, these are mainly plants, while in aquatic ecoregions algae predominate in this role. Ecologists distinguish primary production as either net or gross, the former accounting for losses to processes such as cellular respiration, the latter not.