Here is a research abstract on bioaccumulation in orcas modeled by scientists at Simon Fraser University.
I strongly recommend viewing the presentation, which is in poster format at the link:
Juan
Jose Alava and ; Frank Gobas. A Marine Food Web Bioaccumulation model for
Cesium 137 in the Pacific Northwest,” Conference for Society
for Environmental Toxciology & Chemistry (SETAC); 2014 Nov 9 – Nov 13; Vancouver,
Canada. Available https://www.researchgate.net/publication/268982476_A_Marine_Food_Web_Bioaccumulation_model_for_Cesium_137_in_the_Pacific_Northwest
ABSTRACT
BODY: The Fukushima nuclear accident on 11 March 2011 emerged as a global
threat to the conservation of the Pacific Ocean, human health, and marine
biodiversity. On April 11 (2011), the Fukushima nuclear plant reached the
severity level 7, equivalent to that of the 1986-Chernobyl nuclear disaster.
This accident was defined by the International Atomic Energy Agency as “a major
release of radioactive material with widespread health and environmental
effects requiring implementation of planned and extended countermeasures”.
Despite the looming threat of radiation, there has been scant attention and
inadequate radiation monitoring.
This is unfortunate, as the potential
radioactive contamination of seafoods through bioaccumulation of radioisotopes
(i.e. 137Cs) in marine and coastal food webs are issues of major concern for
the public health of coastal communities.
While
releases of 137Cs into the Pacific after the Fukushima nuclear accident are
subject to high degree of dilution in the ocean, 137Cs activities are also
prone to concentrate marine food-webs. With the aim to track the long term fate
and bioaccumulation of 137Cs in marine organisms of the Northwest Pacific, we
assessed the bioaccumulation potential of 137Cs in a North West Pacific foodweb
by developing, applying and testing a simulation time dependent bioaccumulation
model in a marine mammalian food web that includes fish-eating resident killer
whales (Orcinus orca) as the apex predator.
The model outcomes showed that 137Cs can be
expected to bioaccumulate gradually over time in the food web as demonstrated
through the use of the slope of the trophic magnification factor (TMF) for
137Cs, which was significantly higher than one (TMF > 1.0; p < 0.0001),
ranging from 5.0 at 365 days of simulation to 30 at 10,950 days.
From 1 year to
30 years of simulation, the 137Cs activities predicted in the male killer whale
were 6.0 to 182 times 137Cs activities in its major prey (Chinook salmon, Oncorhynchus
tshawytscha).
Bioaccumulation of 137Cs was characterized by
slow uptake and elimination rates in upper trophic level organisms and
dominance of dietary consumption in the uptake of 137CS. This modeling work
showed that in addition to the to the ocean dilution of 137Cs, a magnification
of this radionuclide takes place in the marine food web over time.
•
KEYWORDS: Bioaccumulation, Ecological risk
assessment, Ecotoxicology, Monitoring
BELOW FIND IMAGES FROM TODAY'S RAIN STORM AT FUKUSHIMA DAIICHI
Hi Majia, I've been feeling so helpless lately, trying in vain to read what the Fukushima webcam watchers have to say. Jec, horse, wotcha, lostworld, chasaha, nuckelchen, rockyourworld, mungo, timemachine, norbu, wideawake, pure water,and you Majia ... your input and all the webcam watchers crew can't report anymore. The forum is deeply missed.
ReplyDeletehttps://www.youtube.com/watch?v=uPHQDp_PZi0
Thx to William St George for the link.
To you, dear majia, thanks for keeping reporting here.
Peace. Elibi @twelibi
Fukushima has been proven not harmful to human health. Buoaccumulation occurs all the time.
DeleteHang in there Elibi...
DeleteI find strength in our growing numbers....
Don't eat fish and move away from NPPs to reduce your bioaccumulation of radiation. Sendai is an accident waiting to happen. Fukushima was captured with its nuclear pants on fire by webcam watchers. The forum may be broken but watchers will find a way to get the word out even as censorship and distractions flood the internet.
ReplyDeleteHilarious that the Atomsforpeace troll shows up here at Loose Nuke, wow.
ReplyDeleteMajia, you hit the big time!