Marine Biodiversity Loss - A Global Crisis
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Although many have known about biodiversity importance for a long time, the loss of marine biodiversity is intensively climbing. The loss of marine biodiversity, both in the past and in the 21st century, is an international problem, resulting in degrading situations, all across the globe. Many marine organisms and ecosystems have come under sevre stress, from the increase of human impacts. In different parts of the world, species face many different threats, but overall, human activities threaten every part of the oceans, with 41% of the the ocean strongly impacted by a variety of human activities.
Before humans began to significantly exploit the ocean, the only disturbances causing sudden declines in biodiversity at all levels, were environmental disturbances. However, human activities are without doubt now the strongest driver of change in marine biodiversitu at all levels of organisation.
Before humans began to significantly exploit the ocean, the only disturbances causing sudden declines in biodiversity at all levels, were environmental disturbances. However, human activities are without doubt now the strongest driver of change in marine biodiversitu at all levels of organisation.
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The pressures of fishing have given rise to a new category of species depletion, commercial extinction. Fish and shellfish populations are depleted to the point that it is no longer economically possible to fish for them. Although they're not extinct, these species are no longer playing their important roles in their ecosystems, and some futher species, have been pushed to the brink of exrinction due to this. Fishing operations, such as trawling, by catch and overfishing, destroys habbitats and depletes species populations. Repetition of such activities delays or prevents recovery in the ecosystem.
Commercial whaling in the past was for whale oil. With no reason to use whale oil today, commercial whaling is mainly for food, while there is also some hunting for scientific research purposes. A large scale commercialised whaling is so destructive.
Climate related threats currently have the highest increasing impact on marine ecosystems, with inceased ocean temperatures, ocean
acidifcation (acid), sea level rise, increased ultraviolet radiation and increased storm frequency/intensity. This results in the production of shifts in species' ranges, ocean productivity, species compostion and population dynamics. Land-based activities cause direct habbitat destruction and result in density runoff.
There is particular concern for large preddators in our oceans; including tunas, billfish, sharks and sea turtles, as a growing number of these animals and their habbitats been listed as threatened or endangered.
Commercial whaling in the past was for whale oil. With no reason to use whale oil today, commercial whaling is mainly for food, while there is also some hunting for scientific research purposes. A large scale commercialised whaling is so destructive.
Climate related threats currently have the highest increasing impact on marine ecosystems, with inceased ocean temperatures, ocean
acidifcation (acid), sea level rise, increased ultraviolet radiation and increased storm frequency/intensity. This results in the production of shifts in species' ranges, ocean productivity, species compostion and population dynamics. Land-based activities cause direct habbitat destruction and result in density runoff.
There is particular concern for large preddators in our oceans; including tunas, billfish, sharks and sea turtles, as a growing number of these animals and their habbitats been listed as threatened or endangered.
"Marine Biodiversity Loss" - YouTube