Peer-reviewed primary literature: Original documents with first-hand information or empirical research study that was conducted by the author is called Peer-reviewed primary literature. Data from experiments is primary literature.
For example, Hypotheses, research questions, tests, and methods.
Biodiversity an introduction by Kevin J. Gaston, John I. Spicer is a good example of primary literature.
Peer-reviewed secondary literature: Document that is based on other sources or sources that evaluate or draw conclusions from a primary source is called Peer-reviewed secondary literature. Secondary literature most is based on primary research sources.
For example, Literature review, Review articles.
Biodiversity loss and its impact on humanity is a good example of secondary literature.
Link: https://www.nature.com/articles/nature11148?report=reader
Peer-reviewed tertiary literature: Documents that are sourced in the index, establish, or compile other sources is called Peer-reviewed tertiary literature. Tertiary sources mostly summarize the research about secondary sources.
For example Dictionaries, Wikipedia, and Encyclopedias.
Plant biodiversity and genetic resources matter is a good example of tertiary literature.
