Crustose Lichen

Rhizoplaca polymorpha

Crustose lichens are tiny organisms that grow on rocks, trees, and even roofs. They come in different colors like gray, yellow, or orange and help keep the environment clean.

Habitat: Mountain regions, Deserts

Appearance

The Crustose Lichen is a flat, paint-like growth that sticks very tightly to surfaces. It can be found in shades of grey, green, yellow, orange, or black, often forming intricate patterns. Unlike moss or other fungi, it appears as a thin, crusty layer fused to its substrate.

KingdomFungiPhylumAscomycotaClassLecanoromycetesOrderLecanoralesFamilyLecanoraceaeGenusRhizoplaca

Crustose Lichen

Interesting facts

Crustose lichens are often among the first living things to grow on new volcanic rock.

Lichens grow incredibly slowly; some only expand a tiny bit each year, making them hundreds of years old!

Some lichens can survive being completely dried out for years, then come back to life with rain!

Tiny water bears (tardigrades) often live safely hidden within the protective layers of lichens.

Special abilities

Crustose Lichen can colonize bare rock because its hardy nature helps it survive harsh, exposed environments as the first life.

Crustose Lichen has tiny pores that absorb nutrients and pollutants from the air, helping it clean the atmosphere while growing.

Crustose Lichen can slowly break down rocks by secreting acids, which helps it extract minerals and creates new soil.

Measurements & details

Height: 0.1-0.5 cm
Edibility: inedible
Growth Substrate: other
Season: Year-round

Ecological connections

symbiotic with

Green alga

Trebouxia decolorans

Alga provides sugars through photosynthesis.

eaten by

Red slug

Arion rufus

Slugs and snails graze on lichen surfaces.

shelters

Tardigrade

Macrobiotus hufelandi

Tardigrades live protected within lichen tissues.

Traits

Lichen

This trait describes a composite organism resulting from a symbiotic association between a fungus and a photosynthetic partner, typically an alga or cyanobacterium.