ExtinctMammals: Difference between revisions
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== Connection to Coral Reefs == | == Connection to Coral Reefs == | ||
• Lots of extinctions/endangerment is caused by loss of habitats – coral reefs have declined 40 percent world wide (Zimmer) | |||
o Partly a result of global warming (Zimmer) | |||
• Loss of coral due to bleaching/global warming have changed the structure of coral reef ecosystems and communities – lead to changes in the fish communities, which lead to more changes through the trophic levels (Munday) | |||
• Direct relationship between abundance of coral and abundance of coral dwelling fish (Munday) | |||
== Prevention == | == Prevention == |
Revision as of 20:44, 29 February 2016
Extinct Marine Mammals
Past Extinctions
Causes
Effects
On Humans
• Overexploitation seems to be the main issue – loss of fish from overfishing and poor practices can destroy ways of life, jobs, industries, etc.
• Marine mammals are often caught as bycatch
• Unregulated harvest
• new and innovative solutions to this problem are required to take account of the socioeconomic conditions experienced by fishermen” (Merritt)
• Issue of regulation versus deregulation – looking at pros and cons of regulation seeing as it costs a lot, but is significant in saving a species
o Regulation = politically unpopular (Merritt)
• Poverty and the collapse of other industries can lead to abrupt changes in local fishing conditions – may start to prey on marine mammals once their value as food and bait is noticed
o Unregulated and unsustainable (Merritt)
o Peruvian dolphins; anchovy fisheries collapsed so people started hunting dolphins; led to depletion in population (Merritt)
On Ecosystems
• World’s fisheries are not only impacting marine mammals, but the trophic structure as well – by capturing huge amounts of fish they are causing changes in energy pathways and species numbers (Merritt)
o Affect marine mammals adversely
• Loss of biodiversity/ decline in mammals can cause population imbalances in other species (Munday)
Connection to Coral Reefs
• Lots of extinctions/endangerment is caused by loss of habitats – coral reefs have declined 40 percent world wide (Zimmer)
o Partly a result of global warming (Zimmer)
• Loss of coral due to bleaching/global warming have changed the structure of coral reef ecosystems and communities – lead to changes in the fish communities, which lead to more changes through the trophic levels (Munday)
• Direct relationship between abundance of coral and abundance of coral dwelling fish (Munday)