What’s on the Species Interactions poster
A 6-row table: Interaction · A / B · Example.
Effect on species A and species B.
- Mutualism — + / + — Mycorrhizae and plant roots
- Commensalism — + / 0 — Barnacles on a whale
- Parasitism — + / − — Tapeworm and host
- Predation — + / − — Lion and zebra
- Competition — − / − — Two species, same niche
- Amensalism — 0 / − — Trees shading undergrowth
The competitive exclusion principle: two species cannot occupy exactly the same niche indefinitely. One outcompetes the other.
Questions about the Species Interactions poster
- What’s on the Species Interactions poster?
- A 6-row table: Interaction · A / B · Example. Effect on species A and species B. Mutualism — + / + — Mycorrhizae and plant roots; Commensalism — + / 0 — Barnacles on a whale; Parasitism — + / − — Tapeworm and host; Predation — + / − — Lion and zebra; Competition — − / − — Two species, same niche; Amensalism — 0 / − — Trees shading undergrowth. The competitive exclusion principle: two species cannot occupy exactly the same niche indefinitely. One outcompetes the other.
- Who is the Species Interactions poster for?
- Species Interactions belongs to the Biology section rather than to a school year, because life science is not something one grade owns. Anyone learning ecology can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Species Interactions poster?
- Two species, two outcomes each. That grid generates the whole classification. A wall chart earns its place by being glanceable from where the work is happening, so Species Interactions belongs on the wall where that life science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Species Interactions?
- Measuring Biodiversity, Carbon in Ecosystems and Climate & Ecosystems sit alongside Species Interactions in the Biology section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Measuring BiodiversityCarbon in EcosystemsClimate & Ecosystems
- Is the Species Interactions poster free to download and print?
- Yes. Species Interactions downloads as a free PDF with no account, no email and no watermark, like everything else in the Biology section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Species Interactions poster print at?
- Species Interactions is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Species Interactions loses nothing.Printing guide
Related posters
Charts that sit alongside Species Interactions on the same wall.
Browse every Biology poster, or start from the full catalogue.