Understanding the impact of climate change on demersal fish communities is an important element of navigation in the future, but it is difficult to balance individual factors in natural systems.
This makes it difficult for researchers to fully understand how climate change will affect the diversity and abundance of fish in the future.
In a new study, researchers used California Gulf oceanographic gradients to investigate the effects of variable oxygen levels and temperature on fish from land fish that live on or near the ocean floor.
They found that in areas with very low oxygen content (7 mol / kg oxygen or less), fish diversity was dramatically reduced.
In comparison, oxygen concentrations at sea level are usually between 200 and 300 μmol / kg.
This is important for the future of the fishing community at sea in the face of climate change.
The unique geography of the Gulf offers dramatically different environmental conditions in a relatively short distance.
In the north, deep sea temperatures with high oxygen content are relatively warm, while in the south the deep sea is cooler and very low in oxygen. Understanding the impact of climate change on demersal fish communities.
Researchers used MBARI’s Doc Ricketts (ROV) remote-controlled vehicle to conduct video transactions on the seabed in the northern, central and southern Gulf, and found various fish species in the region.
Examination of the composition, density and diversity of basic fisheries and environmental conditions has identified trends that can help improve our understanding of climate change and better prepare for a sustainable future.
This shows that, although biodiversity is reduced in this oxygen-deprived zone, some species have adaptations that allow them to survive even under hypoxic conditions.
The research team then combined the results of the community analysis with the forecast of future climate models for the Gulf of California to determine what long-term trends can be expected in this fishing community.
The results show that fishing communities in the north and central gulf are likely to be most affected by the combined effects of warming and oxygen loss over the next 80 years if climate change continues as expected in a normal scenario. and existing oceanographic conditions. Understanding the impact of climate change on demersal fish communities.
This can cause a decrease in the habitat of some fish species and make the community fragile and vulnerable.
“This work helps us understand how oxygen and temperature trends are likely to affect the fishing community in the future,” said Researcher, whose research was supported by scientific associations from the National Science Foundation.
This has an impact on how we manage deep-sea ecosystems with climate change.
We are currently setting guidelines on how much fish can be extracted from fisheries based on our understanding of ecosystems and reproduction rates.
These and similar studies show us what can happen in the future if we encourage environmental changes in the ocean.
This allows us to create a framework for understanding so we can make decisions based on information about conservation and management of the entire ecosystem and the benefits we receive.