Difference between revisions of "Marine habitats and ecosystems"
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| − | This article | + | This article provides an introduction to habitats that form the basis of [[:Category:Marine_Biodiversity|marine biodiversity]]. Coastal Wiki articles related to coastal and marine habitats are listed under the category [[:Category:Coastal and marine habitats|coastal and marine habitats]]. |
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==Introduction== | ==Introduction== | ||
Marine [[ecosystem]]s are part of the earth’s aquatic ecosystem. The [[habitat]]s that make up this vast system range from the productive nearshore regions to the barren ocean floor. | Marine [[ecosystem]]s are part of the earth’s aquatic ecosystem. The [[habitat]]s that make up this vast system range from the productive nearshore regions to the barren ocean floor. | ||
| − | The marine waters may be fully saline, brackish or nearly fresh. The saline waters have a [[salinity]] of 35-50 ppt (= parts per thousand). The freshwater has a [[salinity]] of less than 0.5 ppt. The brackish water lies in between these 2. Marine [[habitat]]s are situated from the coasts, over the [[continental shelf]] to the [[Open oceans|open ocean]] and [[Deep | + | The marine waters may be fully saline, brackish or nearly fresh. The saline waters have a [[salinity]] of 35-50 ppt (= parts per thousand). The freshwater has a [[salinity]] of less than 0.5 ppt. The brackish water lies in between these 2. Marine [[habitat]]s are situated from the coasts, over the [[continental shelf habitat|continental shelf]] to the [[Open oceans|open ocean]] and [[Deep sea habitat|deep sea]]. The [[ecosystem]]s are sometimes linked with each other and are sometimes replacing each other in other geographical regions. The reason why [[habitat]]s differ from another is because of the '''physical factors''' that influence the functioning and [[Marine Biodiversity|diversity]] of the [[habitat]]s. These factors are temperature, [[salinity]], [[Tide|tides]], [[currents]], wind, wave action, light and substrate. <ref>Levinton J.S. 1995. Marine biology: function, biodiversity, ecology. Oxford University Press. p. 420</ref> |
'''Marine ecosystems''' are home to a host of different species ranging from [[plankton|planktonic]] organisms that form the base of the marine [[food web]] to large marine mammals. Many species rely on marine [[ecosystem]]s for both food and shelter from predators. They are very important to the overall health of both marine and terrestrial environments. | '''Marine ecosystems''' are home to a host of different species ranging from [[plankton|planktonic]] organisms that form the base of the marine [[food web]] to large marine mammals. Many species rely on marine [[ecosystem]]s for both food and shelter from predators. They are very important to the overall health of both marine and terrestrial environments. | ||
| − | '''Coastal habitats''' are those above the spring high [[tide]] limit or above the mean water level in non-tidal waters. <ref>http://eunis.eea.europa.eu/habitats-factsheet.jsp?idHabitat=409</ref> They are close to the sea and include habitats such as [[Sand Dunes in Europe|coastal dunes]] and [[sandy shores]], beaches , | + | '''Coastal habitats''' are those above the spring high [[tide]] limit or above the mean water level in non-tidal waters. <ref>http://eunis.eea.europa.eu/habitats-factsheet.jsp?idHabitat=409</ref> They are close to the sea and include habitats such as [[Sand Dunes in Europe|coastal dunes]] and [[sandy shores]], beaches , cliffs and supralittoral habitats. Coastal [[habitat]]s alone account for approximately 30% of all marine [[biological productivity]]. The diversity and productivity are also important for humans. These habitats provide a rich source of food and income. They also support species that serve as animal feed, fertilizers, additives in food and cosmetics. Habitats such as [[mangrove]]s and [[seagrass]]es protect the coastlines from wave action and erosion. Other areas provide sediment sinks or act as filtering systems. |
| − | Despite the importance of marine [[ecosystem]]s, increased human activities have caused significant damage or are serious threats to the [[Marine Biodiversity|marine biodiversity]]. These activities can be overfishing, pollution, introduction of exotic species or coastal development. For this reason, conservation plans are necessary to save the marine [[ecosystem]]s from being lost. | + | Despite the importance of marine [[ecosystem]]s, increased human activities have caused significant damage or are serious threats to the [[Marine Biodiversity|marine biodiversity]]. These activities can be overfishing, pollution, introduction of exotic species or coastal development. For this reason, conservation plans are necessary to save the marine [[ecosystem]]s from being lost. |
<gallery> | <gallery> | ||
| − | image:Rocky coast in the Azores.jpg|Rocky shores | + | image:Rocky coast in the Azores.jpg|Rocky shores. Photo credit L. Quinta. |
| − | image:Beach zeeuwsvlaanderen.jpg|Sandy shores | + | image:Beach zeeuwsvlaanderen.jpg|Sandy shores. Photo credit Albert Kok. |
| − | image:Continental shelf.jpg|Continental shelf with overlying water | + | image:Continental shelf.jpg|Continental shelf with overlying water |
| − | image:Open Ocean.jpg|Open ocean | + | image:Open Ocean.jpg|Open ocean. Photo credit David Stauffer. |
| − | image:Deep sea vent.jpg|Deep sea with hydrothermal vent | + | image:Deep sea vent.jpg|Deep sea with hydrothermal vent |
| − | image:sea ice.GIF|Sea ice | + | image:sea ice.GIF|Sea ice ecosystem |
| − | image:Coral reef.jpg|Coral reef | + | image:Coral reef.jpg|Coral reef. Photo credit James Walter. |
| − | image:eelgrass NOAA.jpg|Seagrass meadow | + | image:eelgrass NOAA.jpg|Seagrass meadow. Photo credit NOAA. |
| − | image:mangrove thailand.jpg|Mangrove | + | image:Kelp.jpg|Seaweed forest (Kelp) |
| − | image:Saeftinghe NIOO-CEME.jpg|Salt marsh | + | image:mangrove thailand.jpg|Mangrove |
| − | image:Western scheldt.jpg| | + | image:Saeftinghe NIOO-CEME.jpg|Salt marsh |
| + | image:Western scheldt.jpg|Western Scheldt estuary | ||
</gallery> | </gallery> | ||
| − | == | + | ==Habitat types== |
| − | + | We distinguish the following habitat types: | |
| − | [[Rocky | + | [[Rocky shore habitat]] |
| − | [[Sandy | + | [[Sandy shore habitat]] |
| − | [[Continental shelf]] | + | [[Continental shelf habitat]] |
[[Open oceans]] | [[Open oceans]] | ||
| − | [[Deep | + | [[Deep sea habitat]] |
| − | [[Sea ice | + | [[Sea ice ecosystem]] |
[[Coral reefs]] | [[Coral reefs]] | ||
[[Seagrass meadows]] | [[Seagrass meadows]] | ||
| + | |||
| + | [[Seaweed (macro-algae) ecosystem services]] | ||
[[Mangroves]] | [[Mangroves]] | ||
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[[Salt marshes]] | [[Salt marshes]] | ||
| − | [[ | + | [[Estuarine ecosystems]] |
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| + | Related Coastal Wiki articles are listed under the respective habitat types. | ||
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| − | + | [[Category:Coastal and marine habitats]] | |
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Latest revision as of 16:05, 14 November 2024
This article provides an introduction to habitats that form the basis of marine biodiversity. Coastal Wiki articles related to coastal and marine habitats are listed under the category coastal and marine habitats.
Introduction
Marine ecosystems are part of the earth’s aquatic ecosystem. The habitats that make up this vast system range from the productive nearshore regions to the barren ocean floor. The marine waters may be fully saline, brackish or nearly fresh. The saline waters have a salinity of 35-50 ppt (= parts per thousand). The freshwater has a salinity of less than 0.5 ppt. The brackish water lies in between these 2. Marine habitats are situated from the coasts, over the continental shelf to the open ocean and deep sea. The ecosystems are sometimes linked with each other and are sometimes replacing each other in other geographical regions. The reason why habitats differ from another is because of the physical factors that influence the functioning and diversity of the habitats. These factors are temperature, salinity, tides, currents, wind, wave action, light and substrate. [1]
Marine ecosystems are home to a host of different species ranging from planktonic organisms that form the base of the marine food web to large marine mammals. Many species rely on marine ecosystems for both food and shelter from predators. They are very important to the overall health of both marine and terrestrial environments.
Coastal habitats are those above the spring high tide limit or above the mean water level in non-tidal waters. [2] They are close to the sea and include habitats such as coastal dunes and sandy shores, beaches , cliffs and supralittoral habitats. Coastal habitats alone account for approximately 30% of all marine biological productivity. The diversity and productivity are also important for humans. These habitats provide a rich source of food and income. They also support species that serve as animal feed, fertilizers, additives in food and cosmetics. Habitats such as mangroves and seagrasses protect the coastlines from wave action and erosion. Other areas provide sediment sinks or act as filtering systems.
Despite the importance of marine ecosystems, increased human activities have caused significant damage or are serious threats to the marine biodiversity. These activities can be overfishing, pollution, introduction of exotic species or coastal development. For this reason, conservation plans are necessary to save the marine ecosystems from being lost.
Rocky shores. Photo credit L. Quinta.
Sandy shores. Photo credit Albert Kok.
Continental shelf with overlying water
Open ocean. Photo credit David Stauffer.
Deep sea with hydrothermal vent
Sea ice ecosystem
Coral reef. Photo credit James Walter.
Seagrass meadow. Photo credit NOAA.
Seaweed forest (Kelp)
Mangrove
Salt marsh
Western Scheldt estuary
Habitat types
We distinguish the following habitat types:
Seaweed (macro-algae) ecosystem services
Related Coastal Wiki articles are listed under the respective habitat types.
References
- ↑ Levinton J.S. 1995. Marine biology: function, biodiversity, ecology. Oxford University Press. p. 420
- ↑ http://eunis.eea.europa.eu/habitats-factsheet.jsp?idHabitat=409
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