Because these streams did not have known upstream sources of potential colonizers, as discussed above, they might have been terrestrial representatives of these groups (misinterpreted as aquatic forms, e.g., worms in the families Enchytraeidae and Lumbriculidae), organisms in cryptobiotic
states (e.g., Triops), hyporheic organisms, or transients on wildlife (leeches and snails).
Tiny invertebrates, including the cryptobiotic
(such as symphylans, psocopterans, small isopods and small spiders) are better sampled (quantitatively) with the quadrat method.
Survival of the cryptobiotic
eutardigrade Adorybiotus coronifer during cooling to -196[grados]C: effect of cooling rate, trehalose level, and short-term acclimation.
state of Artemia cyst, its diapause deactivation and hatching: a review, p.
In many places, where no cattle, hikers, or off-road vehicles have churned the landscape, a fragile crust of cryptobiotic
organisms covers the land.
The crust, called cryptobiotic
or microbiotic soil, is formed by filamentous cyanobacteria, interspersed with tiny lichens and micro-fungi (see Utah's fragile earth).
In many places, cryptobiotic
soil--the organic microbial layer that binds the desert surface, protecting it from erosion--had been overrun and obliterated.
crusts have been observed growing in undisturbed soils around the tracks, but 60 years later, the crusts are still absent from the tracks themselves.
He adds that those areas are often covered by a delicate cryptobiotic
crust that protects the desert from erosion, and for which a hole is anything but beneficial.
I've seen four-wheelers grind their way up desert rock formations near Moab, Utah, where century-old cryptobiotic
crust, made up of soil lichens, green algae, bacteria, and mosses, is as easily damaged and difficult to restore as alpine tundra.
Again, Moab and southern Utah are illustrative.(196) A crucial component of the desert ecosystem is the cryptobiotic
crust made up of mosses, fungi, and lichens.
Crowe (1974) discusses several types of latent states among tardi grades including anhydrobiosis, the cryptobiotic
state induced by desiccation, the state that most limno-terrestrial tardigrades must survive.