Final answer:
The provided texts do not specify the number of plant and animal species utilized by the Aka. They highlight the global estimate of 8.7 million eukaryotic species, with a small fraction identified, stressing the complexities in quantifying biodiversity. Ethnobiological studies are necessary for precise data on species use by cultures.
Step-by-step explanation:
The approximate total number of plant and animal species that the Aka utilize is not provided specifically in the provided text, which makes it challenging to give an exact number. However, the texts discuss biodiversity and the quantification of species in various contexts, such as the assessment of species against Key Biodiversity Area (KBA) criteria in Turkey or the estimation of species in the Hawaiian Islands and other environments. To gain insights into the number of species utilized by a particular group, extensive ethnobiological studies are required, which document the interactions between human cultures and their use of flora and fauna.
Nevertheless, the provided passages detail the concept that there is a vast biodiversity of species, with an estimated total of 8.7 million eukaryotic species worldwide, of which only a small fraction have been identified and named. The texts also explore the challenges in cataloging and understanding the entire scope of species, highlighting the importance of efforts to conserve and study this diversity. This information underscores the fundamental challenges that arise when attempting to quantify the range of species utilized by any indigenous group or culture due to the dynamic nature of biodiversity.