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โป๏ธ
๐ฟ Ecosystems
Carbon & Nitrogen Cycles
Biogeochemical cycles that recycle carbon and nitrogen through atmosphere, land, ocean and living things
UK ๐ 1785 Ecosystems
Key Facts
- 1
Carbon cycle: photosynthesis (absorbs COโ) โ respiration, decomposition, combustion (releases COโ)
- 2
Nitrogen cycle: Nโ fixation (Rhizobium bacteria) โ nitrification โ denitrification โ essential for plant protein
- 3
Ocean absorbs 30% of COโ โ ocean acidification (pH dropped 0.1 unit = 30% more acidic since 1800)
๐ฟ Did you know? Human emissions have increased atmospheric COโ from 280 ppm (pre-industrial) to 422 ppm (2024) โ the highest in 3 million years
Quick Reference
Category
Ecosystems
Country
๐ UK
Year / Era
1785
About
Biogeochemical cycles that recycle carbon and nitrogen through atmosphere, land, ocean and living things