Four Pools

Edison Woods Ew3a 2/25/2017

Left Candona decora right C. crogmaniana

Left Candona elliptica Right Cypria exculpta

Bradleystrandesia tinta Cypria exculpta

Below is the same pool sampled on 4/18/2016, note that the Candona have disappeared from the sample. This disappearance is a phenomena that has been noted in other pools sampled in the three county area. Generally Candona are winter to early spring critters and this is disappearance appears to happen even when the pool has not gone into a draw down stage. The disappearance is much like what occurs with the harpacticoid copeods. It is possible that the Candona produce only X number of generations per years regardless of the pool's condition or perhaps the genus reproduction cycle is temperature dependent. But this would open the question of what triggers the last generation of a season to stop reproducing. Does the temperature increase inhibit the production of sperms or release of eggs? And if the temperature or some other trigger exist does it run through many of the species of the genus?

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Edison Woods Ew3 4/22/2017

The pool below is no more than 5 meters from the pool above. The difference between the two pools is that this one has no forest canopy, little if any leaf detritus and a silty clay waters. Also this is not a temporary pool. In the two years it has not dried.

Edison Woods Ew3 2/25/2017

Two upper Bradleystrandesia lower C. exculpta upper Candona crogmaniana Lower C. exculpta

The pool on 8/25/2016

The possibility that I've got the species of the two ostracods below wrong is high but even if the species labels are wrong they are clearly not the same species as those found in the earlier sample.

Heterocypris incongruens (a really shaky maybe) Physocypria pustulosa

The same pool on 12/06/2016 No ostracods found in the sample.

Jumping to 4/22/2017 and everything changes.

Candona (juvenile)

Cypria exculpta Bradleystrandesia (sp?)

Bradleystrandesia tincta

Guessing all the below are Bradleystrandesia, a chance the last may be B. splendida

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This pool is about 100 meters from the pool above and it is a temporary pool. It is mixture of both open and canopied. This is the first time the pool has been sampled.

Edison Woods Ew11 3/01/2017

While the two Bradleystranesia in photo x and the two Candona (decora and crogmaniana) in photo x were in the above pools this is the first appearance of C. distincta in photo x

B. tincta left Candona decora right Candona crogmaniana Candona distincta

C. crogmaniana below C. distincta

From the 4/22/2017 sample of the above pool.

upper Cypridopsis vidua Bradleystrandsia (sp?) Cypria exculpta

Upper Candona (juvinle) lower Bradleystrandesia

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A wood surrounded temporary pool, I'm guessing it is a temporary pool and old as it has some of the oldest trees in the park.

Edison Woods Ew13 4/13/2017

The question here is why no Candona were found.

left right

Cypria exculpta Bradleystrandesia tincta No idea of ostracod on the right