When carbon dioxide (CO2) is absorbed by seawater, chemical reactions occur that reduce seawater pH, carbonate ion concentration, and saturation states of biologically important calcium carbonate minerals. These chemical reactions are termed "ocean acidification".
Ocean acidification is expected to impact ocean species to varying degrees. Photosynthetic algae and sea grasses may benefit from higher CO2conditions in the ocean, as they require CO2 to live just like plants on land. On the other hand, studies have shown that a more acidic environment has a dramatic effect on some calcifying species, including oysters, clams, sea urchins, shallow water corals, deep sea corals, and calcareous plankton. When shelled organisms are at risk, the entire food web may also be at risk.
:Watch the attached video and then answer the question
How does the carbon dioxide (CO2) level in the atmosphere affects the coral's life in the ocean?
Considering the Gulf of Eilat, which is (as said in the article) the
world's northernmost tropical sea ecosystem. Containing spectacular habitat for
the rich biodiversity in the area.
A marked deterioration in water clarity and quality has been
noted in recent years. Findings show that in 1996, about 70% of the corals in
the Eilat area were alive and 30% dead; in 2001, the situation was reversed
with only 30% live corals and 70% dead.
The main sources of harm doesn’t come from the exceeding
level of CO2 but is a result of direct human activities - such as littering,
oil leaks from marine vessels and from other sources, fishing, mariculture and industrial development.
Dealing with the subject of preserving sea life and coral reefs,
we must look also into other aspects rather than just the carbon dioxide (Co2)
Being long time scuba diver, enjoying the magnificent views of
corals and sea life, my preliminary concern is stopping the sea contamination
caused directly by human activities.
Figure 1: Sviva 2, oil combat vessel, during an oil spill drill, Dec. 2008. Photo:
topic emphasizes the chain effect between different pollution processes in
different locations and their global effect. In this article we see that CO2
emission from sources on earth influences the sea ecosystem. It demonstrates
that all processes on our blue plant are well connected in a way that is much
more visible than the "butterfly effect".
this topic is presented, in this questionnaire and its introduction, requires
some background in chemistry and biology.
In order to
extend the audience, I think that there is a place to try to explain it in a less
Using video with basic animation as in the following
Credite to: New Understandings of Air-Sea CO2 Exchange in Polynya Systems: Results from the IPY ArcticNet and CFL Projects in the Cape Bathurst Polynya By Brent Else
to : Marthese Azzopardi Dr at
University of Malta
(There are problems to attach the pictures when
Finally, the issue presented is a good
demonstration of the chain relations between pollution process from different
types and locations. It shows their interaction and their global
influence on our world. The issue is presented with accurate scientific
The information marks
on the map extend the understanding of the topic and give good examples of the
issues referred in the introduction and the questionnaire. They are
related to the topic and to our location (Israel).
First of all, I must compliment you on your chosen subject. It seems that the subject was carefully chosen, and you learn about him a lot during the preparation of the question. On this subject, Nature Reserves members are dealing with it today-worldwide. And the attention you gave it certainly will not disappear from the eyes of the people concerned.
I would have recommendad to use as list description as needed, leave the youtube scene, and a link if needed, and let the viewers search the answer for themself. I would have puts it like this:
"according to the link and movie above, look for an articles reffering to the subject, read them and answer How does the carbon dioxide (CO2) level in the atmosphere affects the coral's life in the ocean? "
Thus, the question difficeltys level was rising from "understanding" to "Study". And by the "Bloom's Taxonomy" This would be a higher level question.
The distractions Were excellent. Well written. And forcing the respondent to pay attention to small details. I wouldn't have touch them.
Thank you for your remark and the added graph it made it clearer to others to understand the subject . we thought that adding numbers and graphs is needed , howerer, our aim was to keep the subject as simple as possible and not complicated .