Total and subcellular distribution of trace elements (Cd, Cu and Zn) in the liver and kidney of green turtles (Chelonia mydas) from the Mediterranean Sea

Chemosphere ◽  
2008 ◽  
Vol 70 (5) ◽  
pp. 908-913 ◽  
Author(s):  
M.M. Storelli ◽  
G. Barone ◽  
A. Storelli ◽  
G.O. Marcotrigiano
2021 ◽  
Vol 170 ◽  
pp. 112637
Author(s):  
Enrique Lozano-Bilbao ◽  
Ninoska Adern ◽  
Arturo Hardisson ◽  
Dailos González-Weller ◽  
Carmen Rubio ◽  
...  

2013 ◽  
Vol 10 (7) ◽  
pp. 12491-12527 ◽  
Author(s):  
C. Guieu ◽  
F. Dulac ◽  
C. Ridame ◽  
P. Pondaven

Abstract. The main goal of the project DUNE was to estimate the impact of atmospheric deposition on an oligotrophic ecosystem based on mesocosm experiments simulating strong atmospheric inputs of Aeolian dust. Atmospheric deposition is now recognized as a significant source of macro- and micro-nutrients for the surface ocean, but the quantification of its role on the biological carbon pump is still poorly determined. We proposed in DUNE to investigate the role of atmospheric inputs on the functioning of an oligotrophic system particularly well adapted to this kind of study: the Mediterranean Sea. The Mediterranean Sea – etymologically, sea surrounded by land – is submitted to atmospheric inputs that are very variable both in frequency and intensity. During the thermal stratification period, only atmospheric deposition is prone to fertilize Mediterranean surface waters which has become very oligotrophic due to the nutrient depletion (after the spring bloom). This paper describes the objectives of DUNE and the implementation plan of a series of mesocosms experiments during which either wet or dry and a succession of two wet deposition fluxes of 10 g m−2 of Saharan dust have been simulated. After the presentation of the main biogeochemical initial conditions of the site at the time of each experiment, a general overview of the papers published in this special issue is presented, including laboratory results on the solubility of trace elements in erodible soils in addition to results from the mesocosm experiments. Our mesocosm experiments aimed at being representative of real atmospheric deposition events onto the surface of oligotrophic marine waters and were an original attempt to consider the vertical dimension in the study of the fate of atmospheric deposition within surface waters. Results obtained can be more easily extrapolated to quantify budgets and parameterize processes such as particle migration through a "captured water column". The strong simulated dust deposition events were found to impact the dissolved concentrations of inorganic dissolved phosphorus, nitrogen, iron and other trace elements. In the case of Fe, adsorption on sinking particles yields a decrease in dissolved concentration unless binding ligands were produced following a former deposition input and associated fertilization. For the first time, a quantification of the C export induced by the aerosol addition was possible. Description and parameterization of biotic (heterotrophs and autotrophs, including diazotrophs) and abiotic processes (ballast effect due to lithogenic particles) after dust addition in sea surface water, result in a net particulate organic carbon export in part controlled by the "lithogenic carbon pump".


1988 ◽  
Vol 70 (1-2) ◽  
pp. 194
Author(s):  
P. Buat-Menard ◽  
E. Remoudaki ◽  
J. Davies ◽  
C. Quetel ◽  
U. Ezat ◽  
...  

2004 ◽  
Vol 48 (11-12) ◽  
pp. 1122-1129 ◽  
Author(s):  
Jian Yang ◽  
Takashi Kunito ◽  
Yasumi Anan ◽  
Shinsuke Tanabe ◽  
Nobuyuki Miyazaki

2002 ◽  
Vol 45 (1-12) ◽  
pp. 224-229 ◽  
Author(s):  
Yasumi Anan ◽  
Takashi Kunito ◽  
Haruya Sakai ◽  
Shinsuke Tanabe

Chemosphere ◽  
2008 ◽  
Vol 70 (7) ◽  
pp. 1203-1210 ◽  
Author(s):  
Jian Yang ◽  
Takashi Kunito ◽  
Yasumi Anan ◽  
Shinsuke Tanabe ◽  
Nobuyuki Miyazaki

Oryx ◽  
2011 ◽  
Vol 45 (1) ◽  
pp. 143-149 ◽  
Author(s):  
Mohamed Nada ◽  
Paolo Casale

AbstractTurtle trade in the fish markets of Alexandria was reported up to the late 1990s, motivating conservation initiatives and enforcement of legal protection. To assess the current trade and bycatch levels in Alexandria and other ports we carried out an interview survey of 445 people in 2007, mostly fishermen and fishmongers, in 15 coastal cities and fishing ports along the Mediterranean coast of Egypt. The declared catch rates and official fishing fleet statistics suggest that captures of loggerhead Caretta caretta and green turtles Chelonia mydas are in the order of several thousands per year, possibly > 7,000 per year, mainly from trawling, longlining and set nets. Probably several hundred turtles die each year as a consequence of the high mortality rates typical of these fishing gears. In addition, most fishermen from Alexandria and some fishermen from other regions declared that they kill turtles for meat. Regulations and enforcement appear to be ineffective, as turtles are usually killed and consumed on board or only their meat is landed. Some turtles are still traded on the black market in some Alexandria fish markets. The overall mortality probably represents an unsustainable toll on the Mediterranean loggerhead and green turtle populations, and the perception of fishermen is that turtle numbers are declining. Mitigating the identified threats is thus urgent. In particular, intentional killing should be tackled through its cultural drivers, and measures to reduce bycatch mortality need to be tested and implemented.


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