Organism with the greatest amount of gold as percentage of body mass
The organism with the greatest amount of gold as a percentage of body mass is the gold-plated jewel beetle (Julodimorpha bakewelli). These beetles are found in the arid regions of Western Australia. They have an incredibly unique adaptation where their exoskeleton is covered in brilliant metallic gold nanoparticles.
The gold content in these beetles is not that high. On average, it is estimated that the gold-plated jewel beetle contains about 0.2% gold by body mass. However, it is important to note that this is a relatively high concentration compared to other organisms in nature.
The gold nanoparticles on the beetle’s exoskeleton serve multiple purposes. Firstly, they act as camouflage, helping the beetle blend into its environment by reflecting sunlight and imitating the appearance of golden flowers or bark. This camouflage is crucial for protection against predators. Secondly, the gold coating also helps the beetle regulate its body temperature. The metallic surface allows for better thermal management under extreme heat conditions, which is critical for survival in the hot Australian climate.
It is fascinating to see how nature can incorporate elements like gold into its design. However, it is important to note that the gold content in these beetles is not significant in terms of economic value. The amount of gold present is relatively low and not commercially viable for extraction. Nevertheless, these beetles remain a captivating example of nature’s ability to create astonishing adaptations using various elements in the environment.
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