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787811
Chemistry
Description
Mind Map on Chemistry, created by Gavin Niall on 24/04/2014.
No tags specified
nvq (national vocational qualification)
Mind Map by
Gavin Niall
, updated more than 1 year ago
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Created by
Gavin Niall
over 10 years ago
21
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0
Resource summary
Chemistry
Macro Nutrients
Silicon
Sources
weathering of rocks
transported by rivers
Hydrothermal Vents
Distribution higher in coastal waters
due to river runoff
concentrations increase in spring
higher in pacific because more time accumulate
deep water has more because there is no photosynthesizers to use up nutrients
Phosphate
Attachments:
Chemistry - created from Mind Map
Essential for:
Photosyntheses
creating cell walls (phospholipids)
Energy Transfer
Dissolved Inorganic
Most behavioural form
PO43-
80% of total Inorganic P
8.2pH
Dissolved Organic
poorly defined
Occurs in surface waters due to:
Plant decompostion
Decomposition and excretion of Marine Animals
Sources
Natural Weathering of Apatites
Annotations:
E.g. Ca3
Anthropogenic Sources
Chemical and Biological fertilizers
Excretion from farm animals
transported to ocean via rivers
sewage disposal on coasts
Affected By:
The rate of Primary Productivity
Photosynthesis by Phytoplankton
rate of respiration
Nitrogen
Annotations:
NO3
Attachments:
Chemistry - created from Mind Map_1
Sources
Volcanic Activity (NH3)
Atmospheric
Annotations:
NO2 from Nitrogen fixation
Rivers
Annotations:
Fertilizers
removed
Fixation
Plants
Carried out by nodular bacteria from land plants
insignificant in water column
when plants die Nitrogen is released back into water column
Phytoplankton
Euphotic zone
rapid removal in spring due to plankton growth
Regeneration
Oxidation of organic nitrogen
excretion of phytoplankton by fish and zooplankton
Surface waters have low levels
Deep water is rich in Nitrates
Pacific
Higher Concentrations
Water is older thus accumulated more NO3
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