Snow Pool Mosquitoes and Fairy Shrimp

(Note:click on an image to enlarge it)

T-Pool

Some snow melt pools, or vernal pools, can contain tens of thousands of mosquito larvae.  These photos and videos were taken on 30 March 2015, Alpine County. “T-pool” is named for being the top of  a “T’, coming up from ‘Fairy Shrimp Pool’ (see below).

"T-pond" Bear Valley Ca March 30, 2015
“T-pool” Bear Valley Ca
March 30, 2015
"T-pond" Bear Valley Ca March 30, 2015
“T-pool” Bear Valley Ca
March 30, 2015
"T-pond" Bear Valley Ca March 30, 2015
“T-pool” Bear Valley Ca
March 30, 2015
"T-pond" Bear Valley Ca March 30, 2015
“T-pool” Bear Valley Ca
March 30, 2015

 

Fairy Shrimp Pool

Views of Fairy Shrimp Pond, from both ends. This vernal pool is home to a species of fairy shrimp, as well as a lot of snow pool mosquitoes.

Fairy Shrimp pond.
Fairy Shrimp pool. You can see a layer of ice covering the nearest portion of the pool. 2 April 2015

 

 

 

 

 

 

 

 

Fairy Shrimp pond
Fairy Shrimp pool. 2 April 2015

 

 

 

 

 

 

 

fairy shrimp.
Fairy Shrimp 2 April 2015

 

 

 

 

 

 

 

Fairy Shrimp
Fairy Shrimp. 2 April 2015

The fairy shrimp species is probably Streptocephalus sealii, as it matches the description and distribution. This distribution map is from Fairy Shrimps Of California’s Puddles, Pools, And Playas  by Clyde H. Eriksen and Denton Belk, 1999.

Distribution of Streptocephalus sealii
Distribution of Streptocephalus sealii

 

Esposito Pool

This vernal pool contains surprisingly few mosquito larvae, despite its large size, and this rarity of mosquitoes occurs year to year.

Looking down the length of Esposito Pool
Looking down the length of Esposito Pool. 2 April 2015

 

 

 

 

 

 

 

Esposito Pool
A portion of Esposito Pool. 2 April 2015

 

 

 

 

 

 

 

Ice on part of Esposito Pool
Ice on part of Esposito Pool. 2 April 2015

 

 

 

 

 

 

 

Esposito Pool
Esposito Pool. 2 April 2015

 

Bloods Meadow Pool

Bloods Meadow is home to a very large vernal pool in early spring. We find mosquito larvae all around its fringes, and in various locations within the meadow itself.

Bloods Meadow vernal pond
Bloods Meadow vernal pond 2 April 2015

Sierran Treefrog – Pseudacris sierra is common near Bloods Meadow pool.

Sierran Treefrog live near the vernal pond in Bloods Meadow
Sierran Treefrog lives near the vernal pool in Bloods Meadow. 2 April 2015
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