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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Mon May 03, 2010 8:44 am 
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You're talking about THE most vulnerable to climate change, Toko? In other words, there is one species that is known to be more restricted to a narrow range of climate variation? In South Africa, I know of no part of the country that is relatively constant over a narrow range of climate variation; so would be interested to see the answer. :hmz: :hmz:

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Mon May 03, 2010 5:50 pm 
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There are some flagship species likely to suffer huge losses due to global warming. One important species being affected by climate change impacts is found in SA (and elsewhere).


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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Mon May 03, 2010 5:56 pm 
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bishop3006 wrote:
SWAG - black oystercatcher? Warmer temperature will cause rise of the sea and destruction of their nesting sites (which will be replaced eventually, but maybe too late?). Also, it will, for the time being anyway, destroy their food sources? :huh:


Not black oystercatcher, but beach erosion is one of threats.


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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Mon May 03, 2010 7:12 pm 
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Junior says the crocodile and I agree that it is also a very important species that will be seriously endangered. Just not sure about the sea levels. So that's his answer.

So I'll also ride on his answer and guess that maybe it is turtles?

For both of them erosion will remove their nesting sites, while the temperature increase will wreak havoc with sex ratios.

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Tue May 04, 2010 6:29 am 
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bishop3006 wrote:

So I'll also ride on his answer and guess that maybe it is turtles?

For both of them erosion will remove their nesting sites, while the temperature increase will wreak havoc with sex ratios.


Turtle and beach erosion :thumbs_up:

Which species? More ompacts of climate change?


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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Tue May 04, 2010 8:33 am 
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The Hawksbill turtle (Eretmochelys imbricata), with only approximately 8000 nesting females, is probably one of the most threatened. They are already very threatened by habitat loss simply due to all the coastal development going on. If they lose more due to beach erosion and even disappearance, it can be devastating.

Turtles, as with most other reptiles, are dependent on the nesting temperature at around the third week of incubation for sex ratio. Below a band around 29 degrees gives males only while above the band gives females only. (Interestingly, crocodiles are the other way around, with the females at the cooler temperature.)

I'm not sure about other changes, other than the food of course. Other things that does contribute to their status are marine pollution, compromised feeding habitats as already mentioned, unsustainable egg collection and fishery-related mortality. They are the only commercial source of “tortoiseshell” – the rich colours and intricate patterns of the shell reveal great depth and beauty when worked and polished.

How many ladies here have genuine tortoiseshell jewellery, and how many men has bought some for their ladies? :naughty:

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Tue May 04, 2010 8:44 am 
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Nice question :thumbs_up:

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Tue May 04, 2010 8:57 pm 
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bishop3006 wrote:
How many ladies here have genuine tortoiseshell jewellery, and how many men has bought some for their ladies? :naughty:



Not guilty, as the SO does not buy me gifts. :cry: But I like to spoil myself with his credit card. :lol: :lol: Whoop-whoop. (Never thought anything dead or remnants from something dead looks nice, never will). :wink:

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Last edited by Elzet on Tue May 04, 2010 8:59 pm, edited 1 time in total.

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Tue May 04, 2010 8:58 pm 
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Great Q, Toko, :clap: great answer, B3006 :clap: , although I think there are many species that will suffer increasingly so - until they become extinct - such as insect eating birds that was pointed out in my sources. :thumbs_up:

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Tue May 04, 2010 11:18 pm 
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:clap: Welldone, bishop3006. You are IT. :thumbs_up:

A recent IUCN report released at the Copenhagen climate change conference identifies 10 species that are most vulnerable to climate change. Arctic Foxes, Clownfish, Koalas, Emperor Penguins, Leatherback Turtles, Staghorn Corals, Ringed Seals, Quiver Trees, Salmon and Beluga Whales.
Leatherback Turtles are listed as Critically Endangered on the IUCN’s Red List and already face a number of threats, including accidental capture by fisheries, coastal development and mistaken consumption of plastic debris. Leatherbacks highlight the impacts of increasing air and sea temperatures, rising sea levels and changing ocean currents. These changes are likely to affect all marine turtles and many other marine species.
Increasing feminisation:
Average global temperatures are predicted to increase by at least 2°C in the next 40 years due to climate change. The resulting increase in the temperature of the sand used for nesting could have serious consequences for Leatherbacks. The predicted outcome of this change is an increase in the number of females relative to males in populations. This could threaten the stability of Leatherback populations in the future.
Beach erosion:
Ocean levels are thought to have risen at an average rate of 1.8 mm per year since 1961, and are predicted to rise even more rapidly in the future. Increases in storm frequency and severity have also been predicted. This is likely to lead to increased beach erosion and degradation, which could wash away turtle nests and decrease nesting habitat in the longer term.
Dispersal and food availability:
Ocean currents are important for both juvenile and adult Leatherbacks. Juveniles use them to aid dispersal following hatching and adults use them as aids to navigation and long-distance migration. In addition, changes to oceanic currents are likely to affect the abundance and distribution of jellyfish and other Leatherback prey species. While climate change impacts on ocean currents are likely, the nature of these changes, and hence their effects on Leatherbacks, remain uncertain.

http://www.iucn.org/iyb/about/species_o ... s_climate/" onclick="window.open(this.href);return false;


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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Wed May 05, 2010 7:44 am 
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Thanks for the interesting question Toko, and the link - will go read up some.

IT? Nah, this is an OPEN quiz! :twisted:

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Thu May 06, 2010 2:46 am 
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Bishop :clap: :clap:

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Tue May 18, 2010 11:14 am 
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This cycad is extinct in the wild (2008). However, it seems that a few hidden ones were find in the Drakensberg escarpment - location unknown for safety reasons.

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Wed May 19, 2010 6:18 am 
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Encephalartos nubimontanus?

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 Post subject: Re: Extinct Creatures/Plants Quiz (OQ)
Unread postPosted: Wed May 19, 2010 7:31 am 
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No.

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