What are the nutrients in the sea?
主題大綱
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The components that organisms need but tend to lack are called nutrients.
Below is a picture illustrating the differences between factors limiting basic production on land and in the ocean.
In terrestrial vegetation, nutrients are easily circulated between the leaves and the soil, so terrestrial plants have a relatively stable supply of nutrients. Therefore, the main factor limiting the growth of terrestrial plants is the water supply. In the ocean, on the other hand, organic matter produced by photosynthesis is easily transported away from the surface layer (the site of basic production) to deeper water. As a result, nutrients are easily depleted in the surface layer and basic production is frequently limited due to nutrient deficiencies.
二酸化炭素 Carbon dioxide
酸素 Oxygen
窒素 Nitrogen
リン酸 Phosphoric acid
カリウム Kalium
カルシウム Calcium
マグネシウム Magnesium
鉄 iron
亜鉛 Zinc
土壌の鉱物成分 Mineral components of soil
海水の塩成分 Salt component of seawater
陸では、植物と栄養塩が循環しやすく、水が基礎生産を律速する主要因となる。
On land, water is the main factor that rates basic production because plants and nutrients are easily circulated.
海では、栄養塩が深層に輸送されるので、基礎生産を律速する主要因となる。
In the ocean, nutrients are transported to deeper layers and are the main factor in rate-limiting basic production.Let me explain in more detail.
The main components of organic matter are carbon (C), oxygen (O), and hydrogen (H), with sulfur (S), calcium (Ca), magnesium (Mg), nitrogen (N), phosphorus (P), silicon (Si), and potassium (K) as secondary components and iron (Fe), manganese (Mn), zinc (Zn), cobalt (Co), Nickel (Ni), and copper (Cu) are added as trace elements. Marine organisms use these substances to sustain life and eventually die, are excreted, etc., and are mineralized. The inorganic components are then used again by living organisms.Of the secondary components listed above, S, Mg, Ca, and K are abundant in seawater, so their lack is not a limiting factor for the maintenance of life (or basic production in the ecosystem as a whole).Of interest in marine chemistry are the components that are needed by marine organisms but are often lacking in seawater, such as N, P, Si, Fe, Mn,,,,,,,. These components that organisms need but tend to lack are called nutrients.
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