| Bfn Nutrient cycling | |
|---|---|
| Context | Bfn Natural temperate rocky shores |
| Decompositie type | IOR |
Organisms living on rocky shores contribute to transport, recycling and storage to a variety of nutrients, including carbon, nitrogen, phosphorus and sulfur. Terrestrial human activities, especially farming, create an excess inflow of nitrogen and phosphorus, that can lead to algae blooms and disrupt the balance in aquatic ecosystems.
Cyanobacteria, that are oftentimes found in the biofilm covering coastal rocks and macroalgae, fixate gaseous nitrogen (N2) and convert it into ammonia (NH3), that in turn is assimilated by algae and used in production of various organic compounds, such as DNA, amino acids, and proteins. Denitrifying anaerobic bacteria that dwell in the bottom sediment and detritus decompose ammonia into gaseous nitrogen compounds.
Phosphorus enters water as runoff from terrestrial systems and enter the marine food web when it is taken up by various aquatic autotrophic organisms. When plant and animal matter sinks to the bottom of the ocean and decomposes, phosphorus becomes locked in the sediment. Due to the slow nature of phosphorus cycle at least when compared to human lifetime, its net uptake and storage in aquatic systems greatly exceeds its net export out of the system (Miller, 2002).
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| Produceert | Bfn CO2 absorption |
|---|---|
| Consumeeert | |
| Onderdeel van | Bfn Ecosystem functions of rocky shores |
| Instantie van | |
| Betreft |
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| Komt van | Type | Connectie type | Conditie | Waarde | Opmerkingen |
|---|---|---|---|---|---|
| Bfn Sediment concentration in water | Contributes | + |
