[Coral-List] [EXTERNAL] sunscreens threaten coral survival
Bargar, Timothy A
tbargar at usgs.gov
Mon May 9 12:54:08 UTC 2022
Yes, Paracelsus The dose makes the poison - Wikipedia<https://en.wikipedia.org/wiki/The_dose_makes_the_poison?msclkid=70963e93cf9611ec980b1545d6be0354>
The dose makes the poison - Wikipedia<https://en.wikipedia.org/wiki/The_dose_makes_the_poison?msclkid=70963e93cf9611ec980b1545d6be0354>
"The dose makes the poison" (Latin: dosis sola facit venenum 'only the dose makes the poison') is an adage intended to indicate a basic principle of toxicology.
en.wikipedia.org
They dosed at 2 mg/L. I don't know if they dosed at lower or more relevant exposures, but they recognized the issue by mentioning the one paper that found BP3 at something close to their exposure (yet still quite a bit lower). The predominance of the literature (at least in marine waters) does not report anything close.
________________________________
From: Douglas Fenner <douglasfennertassi at gmail.com>
Sent: Saturday, May 7, 2022 11:28 PM
To: Bargar, Timothy A <tbargar at usgs.gov>
Cc: coral list <coral-list at coral.aoml.noaa.gov>
Subject: Re: [EXTERNAL] [Coral-List] sunscreens threaten coral survival
I have a feeling that almost every chemical is likely to be toxic at some concentration. I remember many years ago there was a news item, an instructor assigned nursing students an experiment where they were to drink a large quantity of water and measure urine output over time. One student actually died (not good!!).
The relevant factor is how does the lethal concentration or the minimum effective concentration compare to concentrations found in nature? Not always stressed.
As I read the popular account, it sounded to me like this chemical did not in fact kill the one coral species it was tested on. It might kill them when they are bleached, but that wasn't actually demonstrated. It did kill the anemones tested. Please correct me if I'm wrong.
Cheers, Doug
On Fri, May 6, 2022 at 10:12 AM Bargar, Timothy A <tbargar at usgs.gov<mailto:tbargar at usgs.gov>> wrote:
Doug - thank you for sharing! Very interesting!
The exposure concentration is excessive based on data from our and other published monitoring studies, but pretty clearly demonstrates how BP3 can be toxic.
________________________________
From: Coral-List <coral-list-bounces at coral.aoml.noaa.gov<mailto:coral-list-bounces at coral.aoml.noaa.gov>> on behalf of Douglas Fenner via Coral-List <coral-list at coral.aoml.noaa.gov<mailto:coral-list at coral.aoml.noaa.gov>>
Sent: Thursday, May 5, 2022 7:55 PM
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Subject: [EXTERNAL] [Coral-List] sunscreens threaten coral survival
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Paywall.
Conversion of oxybenzone sunscreen to phototoxic glucoside conjugates by
sea anemones and corals
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see author info for corresponding author
Cheers, Doug
--
Douglas Fenner
Lynker Technologies, LLC, Contractor
NOAA Fisheries Service
Pacific Islands Regional Office
Honolulu
and:
Coral Reef Consulting
PO Box 997390
Pago Pago, American Samoa 96799-6298 USA
Animal melting pot created by climate change could lead to new disease
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