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Diversity Biology II Lab: Algae and Extant Organism Diversity Research
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A lab that studies the species and phylogeny of seaweeds and microalgae to clarify the diversity of algae.
AboutAbout the lab
Exploring algal diversity and the paths of evolution.
This lab studies the diversity and evolutionary pathways of algae, focusing on seaweeds and microscopic microalgae.
It combines a variety of methods, including observation of morphology and ultrastructure, elucidation of life cycles through culture, crossing experiments, and molecular phylogenetic analysis.
Project Professor Kogame mainly studies seaweeds, especially brown algae, and Lecturer Nakada mainly studies the green algal order Chlamydomonadales.
The faculty introduction states that this is one of the few labs where students can properly learn algal taxonomy.
Key terms
- Molecular phylogenetic analysis
- A method of comparing DNA base sequences to infer relationships and evolutionary paths among organisms
- Brown algae
- A group of seaweeds that includes kelp (kombu), wakame, and Scytosiphon lomentaria (kayamonori). They are an evolutionarily distinct lineage from green and red algae
- Reproductive isolation
- A state in which even closely related organisms can no longer produce offspring together. It is a clue for considering whether they are separate species
- Chlamydomonadales
- A group of green algae that includes Chlamydomonas and Volvox. Some are unicellular and some form colonies
ResearchResearch themes
The lab takes algae as its research subject, aiming to understand their diversity accurately and to clarify the paths of their evolution. Covering both seaweeds and microalgae, it pursues research in taxonomy as well as in phylogeny and evolution.
*Illustrative imageRevisiting Seaweed Classification
Seaweeds with simple, hard-to-distinguish forms are re-examined with molecular phylogenetic analysis, drawing on specimens and literature accumulated in the lab. This work leads to descriptions of new species and revisions of classification systems.
*Illustrative imageDiversity in the Species and Life Histories of Brown Algae
Focusing on brown algae, the lab studies phylogeny, intraspecific structure, and how distribution patterns formed, using morphology, life history, and DNA analysis. It confirms the state of reproductive isolation through crossing experiments and also addresses how life histories involving asexual reproduction evolved.
*Illustrative imagePhylogeny and Taxonomy of Green Microalgae
Targeting the green algal order Chlamydomonadales, the lab isolates new culture strains from the field and combines morphological observation, culture experiments, and molecular phylogenetic analysis to describe new species and sort out the classification of genera.
MembersFaculty
- Project ProfessorKazuhiro Kogame
- LecturerTakashi Nakada
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Volvox Aureus 400x” Massimo brizzi / CC BY 4.0 (cropped)
- Revisiting Seaweed Classification: “Acetabularia acetabulum at Kefalonia, Greece 02” Deiellen / CC BY-SA 4.0 (cropped)
- Diversity in the Species and Life Histories of Brown Algae: “Scytosiphon lomentaria 2” Voctir / CC BY-SA 4.0 (cropped)
- Phylogeny and Taxonomy of Green Microalgae: “Chlamydomonas2-3” Dartmouth Electron Microscope Facility, Dartmouth College / Public domain (cropped)
- Related lab (Cell Culture Engineering Lab (Muroran Marine Station)): “CSIRO ScienceImage 905 Undaria pinnatifida Japanese kelp” division, CSIRO / CC BY 3.0 (cropped)
- Related lab (Diversity Biology Ia Lab): “Micrura verrilli” Marlin Harms / CC BY 2.0 (cropped)
- Related lab (Diversity Biology and Evolution Lab): “Laminaria kelp on top of the pinnacle at 13th Apostle PA031640” Peter Southwood / CC BY-SA 3.0 (cropped)
- Related lab (Diversity Biology Ib Lab): “Drosophila mimica” Shchurch / CC BY-SA 4.0 (cropped)
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