Nikolaev
The taxon authority Nikolaev, Nikolajev or Николаев may refer to:
- Alexander Ivanovich Nikolaev (1951–, A.I.Nikolaev), Russian (Soviet) palaeontologist
- Alexander Sergeevich Nikolaev (19..–, A.S. Nikolaev), Russian entomologist
- Evgenij Valentinovich Nikolajev (born 1951, Nikolajev), Russian (Soviet) botanist
- Georgiy Vladimirovich Nikolajev (born 1942, G.V. Nikolajev), Russian (Soviet) entomologist
- Sergey Igorevich Nikolaev (19..–), Russian zoologist and protistologist
- S.L. Nikolaev, Russian entomologist
- Viktor Nikolaevich Nikolajev (1930–, V.N.Nikolajev), Russian (Soviet) botanist
- Vladimir Alexandrovich Nikolajev (1938–2011, V.A.Nikolajev), Russian (Soviet) botanist and phycologist
- Vladimir Fedorovich Nikolajev (1889–1973, V.F.Nikolajev), Russian (Soviet) botanist
- Vladimir Jurievich Nikolajev (1960–, V.Ju.Nikolajev), Russian (Soviet) botanist