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Black River Br22 4-03-2017
Ostracods
A look at the changes of the ostracod species over the seasons in this pool can be found at - Seasonal occurance of Candona
12 13 14
15 16
Vermilion Bacon Woods Bw11 4/05/2017
Ostracods
59 60 61
62 63
Vermilion Bacon Woods Bw18 4/05/2017
An old river channel 10 to 15 cm. deep.
Ostracods
What a fabulous collection of beautiful ostracods; there are 5 or 6 species in this one sample and a fine example of the color differences within the same species in the same pool.
96 97 98
99 100 101
102 103 104
Black River Br25 4-17-2017
This pool was disappearing fast at the time of sampling; 10 to 15 cm. deep.
Ostracods
This temporary pool has another great collection of ostracods. While the ostracod Candona stagnalis or Candona compressa (Identification by Prof. A. Smith) was not found in the current sample it was found in this pool in the 3/23/2016. This Candona Professor Smith is common in wetlands and small pools yet interestingly this is the only pool the ostracod has been found in.
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Below are the ostracods found in this current sample of 4/17/2017.
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Below is a very large ostracod, about 1.5 mm.
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the left is an ostracod but I don't know what the red/orange orb is on the right
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To me the upper looks like a male Candona crogmaniana the lower Candona distincta
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The upper ostracod is either a bad photo or a strange ostracod.
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Ostracods from the 3/23/2016 It is impossible to know whether the absence of C. distincta and C. crogmaniana is sample error or they just weren't there. It would also be interesting is whether the pools condition was such that Candona stagnalis or Candona compressa was able to thrive but those conditions did exist in the 4/17/2017 waters; the inverse is also possible that the condition in 3/23/2016 sample were not favorable to C. distincta and C. crogmaniana. How many years can the eggs remain in the soil waiting for favorable conditions?
179 180 181
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In the 7/06/2016 sample when the pool was 90% drawn down only 3 ostracods of one species was found which may be Physocypria pustulosa. Again interesting that it was only found in this late in the year sample.
183 184
Flowing Black River Res. Br32 4/17/2017
This sample was taken from a small basin at the bottom of waterfall from a small creek that cascades down a 30 foot cliff. The water is only about 5 cm. deep.
Ostracods
While only 7 ostracods were found in the sample there were at least three species. I'm not sure whether 239 is Heterocypris incongruens and whether 241 is a Candona or not.
Bradleystrandesia tincta 237 238
239 240 241
242 243 244
Vermilion Bw3 4/19/2017
Ostracods
An interesting change in species over time occurs in this pool; below are the ostracods found in the 4/19/2017 sample.
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267 268 269
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The same pool in winter. Bacon Woods Bw3 2/17/2014
Beneath the ice and snow the thrive.
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Vermilion Bacon Woods Bw3 12/16/2013 - This sample in winter had a very high number of ostracods per liter - 311. There appear to be 2 species here. One is Cypria exsculpta the other I have no idea. Note the long swimming antennae in 280 - 282
278 279
280 281 282
The only ostracod in the 6/13/2014 was C. exculpta. 283
Kopf Woods Kw6 5/01/2017
Both the cladocerans and ostracods are of interest in this pool.
Ostracods from Kopf Woods Kw6
The ostracods from this pool are interesting; changing not from season to season but also from year to year. Especially interesting is finding 4 benthic Candona species in the same pool at the same time. This pool accentuates the problem of Candona's disappearance as the spring progresses and to me (and probably only to me) the viability of the concept of "niche" in when applied to temporary pools.
Below the the ostracods from the current sample 5/01/2017
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From the 3/28/2016 sample Below the only species found 330
Kopf Woods Kw6 12-11-2016 These ostracods thrived under the ice .
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The 12/10/2015 sample. Another winter sample of the same pool but this time the waters had not frozen.
351 352 353
Candona decora 354 Candona crogmaniana 355 Candona distincta 356
Candona elliptica 357
The 4/29/2016 sample of the same pool.
358 359 360
The 7/17/2016 sample. As can be seen from the photo below the pool is almost dry.
361 362
363 364
Erie County
Pelton Woods 2 5/04/2017
Cladocerans
None in sample which is strange.
Ostracods
So why should this ostracod, Cyprios marginata, turn up here in this small short lived temporary pool when it is not found in others? What conditions allow it to thrive? And who is the little Candona? Alas the poor B. tincta swims alone.
Cyprios marginata 375 376 377
Candona left 378 379
Bradleystrandesia Tincta 380
Putman Marsh Lakeside Erie Co. 5/20/2017
Two samples were taken about 100 yards apart. I've separated the two samples. This is a large marsh (966 acres) that connects directly with Lake Erie. For more information on the marsh see- Putman Marsh Erie Metroparks
Putman Marsh Pt1 - 2 5-20-2017
This sample was taken further from Lake Erie
Ostracods
439 440
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446
Ostracods Putman Pt1 2
This is one of the very few times that a mature (female) Candona has been found in late spring. She is possibly C. elliptica.
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Cold Creek 5/27/2017
Like Lake Kelso this area deserves a web page devoted just to it. The spring is one of those rare unexplored ecosystems. This is a very low oxygen and constant temperature environment.
Below is an underwater photo of whatever it is that grows throughout the spring lake.
Ostracods
This pool has an unusual collection of ostracods. Remembering that this is a low oxygen environment with a constant temperature it makes the finding of mature Candona interesting.
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Castilia Lower Quarry 5/28/2017
542 Ostracods 543
In the case of the two pools, Ew13 and Ew11 below are great deal more can be added with the samples taken after the dates posted here but this update is way long already so we will put all the data together in an upcoming update.
Edison Woods Ew13 6/01/2017
The pool is in drawdown stage being less than 1/2 size from what it was in spring; it is about 10 cm. deep. A brown "scum" covers about 1/2 the pool.
Note the difference in the harpacticoid numbers between April (94 per liter) and June when 0 were found. This is a the "normal" sequence in temporary pools. The ostracods reach there peak in June and then decrease in numbers.
Ostracods
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Edison Woods Ew11 6/01/2017
Ostracods
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While here is not a coverage of the changes in the pool as the progresses it is interesting to note that in March this pool is home to 3 species of large Candona ostracods that disappear (except for the one small one found above) by June. Below from the March 1, 2017 sample.
Candona decora 649 Candona crogmaniana 650 Candona distincta 651
Pelton Woods Streams 6/13/2017
This creek at this time was about 30 to 40 cm. deep but I believe it dries in the summer.
Ostracods
I believe it was Professor Smith who told me that the species below Ilyocypris gibba is an ostracod that prefers running water.
Ilyocypris gibba
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