<p>The journal <em>Diversity</em> has a competent and ambitious international Editorial Board. A number of the EB members published their research in a Special Issue in 2021. About 52 publications on biodiversity ecology and evolution are organized in this Special Issue.</p><p>The publications cover a broad range of several timely aspects of biodiversity such as invasive species; biodiversity management; floristics; Citizen Science; the influence of human activities on plant insect mammal bird reptile and amphibia populations; parasites; genetic diversity and DNA barcoding; as well as microbiome genome and transcriptome studies. Additionally taxonomic and biosystematic topics with the description of new species including a new species of dinosaur are covered in several of the SI publications.</p>