Kingdom Journal (The Journal of Biological Studies) is a journal published by the Biology Study Program, Department of Biology Education, FMIPA, Yogyakarta State University. This journal publishes scientific articles resulting from research and student studies in the fields of biology and applied biology. Published articles are peer-reviewed by no less than two bestari partners and apply scientific publishing ethics as stipulated by COPE (Committee on Publication Ethics). The scope of this journal covers the fields of biology, biotechnology and bioinformatics, applied biology in the fields of microbiology, environment, waters, agriculture, waters, industry, health, and other relevant fields.