description Spotted Salamander Overview
The spotted salamander (Ambystoma maculatum) is a species of mole salamander native to the eastern United States and parts of Canada. Recognizable by its black or dark gray body marked with two irregular rows of yellow or orange spots, it is a primarily terrestrial amphibian that returns to vernal pools to breed. It is scientifically notable for its unique symbiotic relationship with a species of green algae, which enters the salamander's embryos to provide oxygen through photosynthesis.
insights Ranking position
Spotted Salamander ranks #33 of 213 in the Amphibian ranking, behind Green and Black Poison Dart Frog, ahead of Rough-skinned Newt.
help Spotted Salamander FAQ
How do algae help spotted salamander embryos?
The green alga Oophila amblystomatis photosynthesizes inside the egg capsule and supplies additional oxygen to the developing embryo. Research has also detected transfer of photosynthetically fixed carbon to the salamander.
Are adult spotted salamanders photosynthetic?
No, adults do not live like plants or obtain most of their energy from sunlight. The remarkable association is concentrated in eggs and embryos, where algal cells can occur around and even inside embryonic cells.
Where do spotted salamanders lay their eggs?
Ambystoma maculatum usually breeds in temporary, fish-free vernal pools surrounded by forest. Adults often migrate to these pools during rainy nights in early spring.
Why are fish-free pools important to spotted salamanders?
Fish readily consume salamander eggs and larvae, while seasonal pools often dry before permanent fish populations can establish. Protecting both the pool and several hundred feet of surrounding forest is therefore important to the species' life cycle.
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