Quantitative variation in one or more of these factors can cause global warming or global cooling of the earth's atmosphere and surface. To these natural factors is added the influence of man who through the use of fossil fuels releases large quantities of CO2, methane and other greenhouse gases into the atmosphere, increasing the action of the greenhouse effect and generating a climatic overheating that increases the global average temperature of the Earth, with consequences such as desertification, rising and souring of the oceans, more frequent extreme atmospheric phenomena.
The extent and consequences of the phenomenon are of such magnitude that the issue is also called the climate crisis. The Contrasted patterns in climate change risk for Mediterranean fisheries study, published on the Global change biology, told: "Climate change is rapidly becoming one of the biggest threats to marine life, and its impacts have the potential to strongly affect fisheries upon which millions of people rely.
This is particularly crucial for the Mediterranean Sea, which is one of the world's biodiversity hotspots, one of the world's most overfished regions, and where temperatures are rising 25% faster than in the rest of the ocean on average.
In this study, we calculated a vulnerability index for 100 species that compose 95% of the Mediterranean catches, through a trait -based approach. The Climate Risk Assessment (CRA) methodology was subsequently used to assess the risks due to climate change of Mediterranean fisheries."
Climate Crisis is putting Mediterranean fisheries at risk
Researchers then added: "We found that the northern Mediterranean fisheries target more vulnerable species than their southern counterparts.
However, when combining this catch- based vulnerability with a suite of socio-economic parameters, north African countries stand out as the most vulnerable to climate change impacts. Indeed, considering countries' exposure of the fisheries sector and their vulnerability to climate change, a sharp contrast between northern and southern Mediterranean appears, with Egypt and Tunisia scoring the highest risk.
By integrating a trait-based approach on targeted marine species with socio-economic features, our analysis helps to better understand the ramifications of climate change consequences on Mediterranean fisheries and highlights the regions that could potentially be particularly affected."