10 ordspråk av Jennifer Devine
Jennifer Devine
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No population fluctuates as much as 90% naturally, especially in such a stable environment as the deep-sea. Any changes made to halt these population declines would not be evident for several generations?approximately 100 years.
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A recent article in Science has shown how a marine protected area in shallower habitat has been effective. Additionally, we have seen the call for reduced fishing mortality on deep-sea stocks in the Northeast Atlantic and believe that could be an appropriate conservation measure.
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Relative abundance is an index of what's out there. We know a lot of these species move, but within what we have the data for, we are seeing this decline range.
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We're talking about species whose generation time, which is the amount of time (they need) to replace themselves, is 17 to 21 years. So it will be a century before we see any recovery.
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We expected to see declines, but we didn't expect such severe declines. If nothing changes, we could be facing barren oceans or oceans of fish we can't utilize.
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The declines occurred on a timescale equal to, or slightly less than, a single generation of these species.
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They meet the IUCN [World Conservation Union] criteria for being critically endangered.
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Species declines change predator-prey dynamics, energy flow through systems, and ecosystem resilience, stability, function, and form.
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We're learning time and time again as fishery after fishery collapses that you reach such low numbers that they can be considered extinct.
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These are species no one really cares about, but they play a key role in the ecosystem.
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