
author
1862–1950
A German zoologist and botanist, he was known for wide-ranging research on animal life and for studies of phytoplankton and algae. His career moved from university research into scientific public service, linking fieldwork, taxonomy, and marine science.

by C. (Carl Heinrich) Apstein, Friedrich Borcherding, Stephan Clessin, Paul Kramer, E. Schmidt-Schwedt, Arthur Seligo, Friedrich Zschokke
Born in Stettin in 1862, Carl Heinrich Apstein studied at Leipzig, Freiburg, and Kiel, earning his doctorate at the University of Kiel in 1889 with a dissertation on the spinnerets of orb-weaver spiders. Early in his career he worked in Kiel and carried out studies of freshwater plankton in the lakes of Holstein.
He became especially associated with plankton research, marine zoology, and systematic biology. His work ranged across animal groups, and he also published on phytoplankton and algae, helping to build knowledge in fields that connected zoology, botany, and life in aquatic environments.
Later, he served in scientific and government-related roles in Germany while continuing his scholarly work. He died in Berlin in 1950, leaving behind a body of research remembered in zoological and botanical reference works.