At a
UN-organized meeting in Bonn, experts are discussing the plight of endangered
sea turtles. Expert Colin Limpus told DW climate change is just the latest
human-made factor making life tough for turtles.
Deutsche Welle, 17 Sep 2014
DW: Why are
turtles on the agenda?
Marine
turtles have a number of very critical issues related to climate change. The
first is ‘temperature dependent sex determination’. The sex of the hatchlings
is determined by the temperature of the nest half-way through incubation. And a
warm beach creates mostly females, and a cool beach creates mostly males. One
of the concerns with rising global temperatures is that we will shift
potentially into an all-female producing population in a number of places. So
this is a concern of the effect of rising temperatures.
The second
big issue is that turtles nest on sandy beaches. That's the only place they can
lay their eggs. And sea levels rise, then nesting areas could potentially see a
rise in the water table, flooding of the nesting sites and loss of eggs as a
result.
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Limpus is a special UN advisor on turtles |
Additionally,
the increasing the intensity of hurricanes or cyclones: the more intense a
cyclonic disturbance, the greater the destructive effect when the cyclone
crosses coastal waters. So this leads to dramatic changes and the loss of
critical habitat in coastal areas and the feeding areas for sea turtles. And
major damage to a feeding area, may take years to recover. So any change in the
frequency and intensity of these events is going to be detrimental.
Are we
already seeing signs of these things already happening?
Yes, we can
see the effects of major floods and cyclones. Part of the problem is judging
which way this could go with our turtle population. A lot of studies try to
predict on the basis that the population is static and will not shift. But if
we look at what has happened over the last 10 to 12,000 years in Australia, for
example, today, nesting beaches have multiple species nesting in places where
10,000 years ago it was dry land, and the nearest beaches would have been 900
kilometers away. We've gone through a major climate change from the ice ages
through to the present, and sea turtles survived that. They did it by changing
where they breed. So it's a challenge for how the turtles will respond. Will
they stay where they are right now and suffer the consequences? Or can the
population shift to areas that are suitable for them as change occurs? We have
to consider how fast they can adapt with a rapid change in climate compared to
what they went through in the past.
So we are
probably talking about a faster climate change than what we have seen to date?
That's what
some people are saying. If that's the case, it may challenge the capacity of
turtles to do adapt. On the other hand, there are areas of their biology that
we have not really investigated very well. A turtle comes back to the area
where it's born. Recent research suggests that they don’t necessarily go back
to the same beach where they were born, but go back to the region. So that
suggests that as a turtle grows up, it choosing where it wants to breed. It may
be able to make choices and may respond to changes, and choose a different site
maybe within hundreds of kilometers of where it was born. So it could choose a
beach with the right temperatures and stability.
But we
don't know? And what can we do about it?
No but I
guess I have some confidence that these animals, which have survived the past
millions of years, have come through many climate change events. They’ve survived
the catastrophic events that caused the demise of the dinosaurs. But in the
past they didn't have to deal with human impacts. All of our sea turtles are
listed as threatened species. It's going to depend on how we help them.
Obviously the broader community has to address the issue of climate change. We
need to start looking at how we manage temperatures of beaches, how we tackle
the recovery of foraging areas, sea grass pastures, coral reefs. We need to
keep them viable. We have to look at the sediment runoff that comes with
floods, because that has a very big negative impact. How do you stop that soil
eroding from your farmlands? These are all things we can do to soften the
impact on turtles.
Why should
we be worried about marine turtles in general, what role do they play in the
ecosystem?
That
depends on in which society you ask that question. A person living in Berlin
might say “can't see much point in it.” If you were talking to an indigenous
person in northern Australia, they would talk about the iconic value of the
turtles in terms of totemic animals that are an integral part of their
religious culture. And there are areas where it is the primary source of red
meat for the community, so for them as a food resource and a cultural thing,
very important. In the area where I grew up, the eco-tourism around turtles is
the primary cash flow for the district economy for about five months of the
year. Tourists come to look at nesting turtles. So the people in the business
community would see it as an important economic component. As a biologist I see
them as an integral part of the ecosystem. The loggerhead turtles have a
function in the regulation of the density of shellfish in some areas, they feed
on them. The green turtles are herbivores feeding on sea grass and their
activity promotes the turnover of nutrients in a sea grass pasture. So turtles
have lots of significance to different parts of the world.
Related Article:
(Subjects: Religion, Shift of Human Consciousness, 2012, Intelligent/Benevolent Design, EU, South America, 5 Currencies, Water Cycle (Heat up, Mini Ice Ace, Oceans, Fish, Earthquakes ..), Middle East, Internet, Israel, Dictators, Palestine, US, Japan (Quake/Tsunami Disasters , People, Society ...), Nuclear Power Revealed, Hydro Power, Geothermal Power, Moon, Financial Institutes (Recession, Realign integrity values ..) , China, North Korea, Global Unity,..... etc.) - (Text version)
“… The Weather
Let's talk about the weather. We retreat to exactly what we told you before in this very chair. The water cycle is a cooling cycle, not a heating cycle. You're going to have more severe winters and storms. It's going to get colder. But it gets warmer before it gets colder. That is the cycle, and it has always been the cycle. You can see it in the rings of the trees and the cores of the ice. Don't let your scientists pull the political wool over your eyes for their own purposes. Start seeing these things for what they are. It's a recurring cycle based on four Earth alignment attributes, including the wobble (the precession). You're in this cycle. Prepare.
The beginnings of it will be with you from now at least until the end of the 2012 36-year window, and you can watch it work. The first thing that happens is that the ice melts at the poles, but not completely. It's the way it has happened before. As the redistribution of weight from the poles to the oceans of the earth takes place, the weight is redistributed to the crust, and that creates earthquakes. And the earthquakes that will be the most powerful are the ones that are closest to the poles. We told you that some time ago. So it's not a mystery that suddenly you have some of the most powerful earthquakes that you've ever had. Not only that, but a cooling ocean creates larger storms.
What do the conspiracists do with all this? "See? We're doomed. Here it comes," they say. "Here it comes! The end is here!" Twenty-two years ago, we gave you the information that is happening today. We told you about the weather. We told you to get ready for it, but we still haven't told you why the water cycle is needed. We've hinted at it since it is very controversial, and we'll lose many readers right here and now. Here's the prediction: The scientists are going to laugh and biologists are going to scratch their heads and roll their eyes.
The Refreshing of the Cycle of Life
When you change the temperature of the waters of the planet, it changes the life cycle of the ocean and it eventually renews itself. The life cycle of the planet has a limit to its viability over time. There has to be a refreshing of the very cycle of life, and this is what the water cycle does. Are there any places you've seen too many fish lately? Yes. Millions of salmon in the north. Odd that it was in Alaska, isn't it? Alaska is very close to the poles where the water temperature is being felt first. Oh, again the experts will tell you that this is not the reason. It's about hatcheries and rivers. But nobody predicted this, did they? Science is fast to give you reasons, but slow to give you logic in advance. They always seem to be surprised.
We are saying things we haven't said before. Again, watch for this, an actual change in the life cycle of the planet's oceans because of the water temperature shift. Biologists are going to have to start redesigning the paradigm of how everything works, including reefs, ocean bottoms, and how plankton survive and reproduce. Listen, this is not the first time that the life cycle has been refreshed! But again, this may take generations of humanity to complete. In the process, you may again lose species. This is normal. Gaia is slow, and Humans are impatient. Your textbooks may someday tell of how naive humanity was back in 2011 when they tried to blame weather changes on everything but a natural cycle. Now you know why there is a water cycle.
So what does that tell you about Gaia? Gaia is beginning the cycle of refreshing life on over-fished oceans. It tells you that in the cracks, there is love and caring about the Humans who live on the earth. There's a reason you're here. There's a plan here, and a benevolent Universe and quantum energy with intelligent design. All is there for you, precious, sacred Human Being. …”
So what does that tell you about Gaia? Gaia is beginning the cycle of refreshing life on over-fished oceans. It tells you that in the cracks, there is love and caring about the Humans who live on the earth. There's a reason you're here. There's a plan here, and a benevolent Universe and quantum energy with intelligent design. All is there for you, precious, sacred Human Being. …”
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