Survey Of The Freshwater Gastropods Of Southeastern Kansas With Emphasis On The Distribution And Habitat Use Of The Delta Hydrobe (Probythinella Emarginata)
Bibliographic record
Abstract
The status of many aquatic gastropods in North America is not well understood. Many are exposed to threats similar to those that affect bivalves and other aquatic macroinvertebrates. The delta hydrobe (Probythinella emarginata) is a gill-breathing (prosobranch) snail that occurs in the northeastern United States and eastern Canada. It is 1 of only 5 species of prosobranchs in Kansas and is highly sensitive to changes in water quality within watersheds. Probythinella emarginata is presumed to be a Pleistocene relic in the state; it was first collected alive in Kansas in 2001 within Cedar Creek, Chase County, Kansas. I surveyed 13 sites on Cedar Creek, a second-order stream in the Flint Hills region of tallgrass prairie, in an effort to delineate the distribution and habitat preference of P. emarginata. In addition, 38 sites near Cedar Creek and in adjacent basins in southeastern Kansas were surveyed. Eleven species of freshwater gastropods were collected; P. emarginata was collected alive only in Cedar Creek, Chase County, and the Elk River, Montgomery County. Probythinella emarginata was the most abundant valve collected in Cedar Creek, but only 2 of 604 valves collected represented live individuals. This population, as judged by previous collections, has experienced a decline since 2001. Individuals from the Elk River population were collected among algae-covered bedrock in the lower portion of the basin. Densities of 3.7/m2 and 24.2/m2 were quantified from 2 sites in the Elk River but were restricted to downstream locations. Probythinella emarginata in the Elk River was positively associated with dissolved oxygen and negatively associated with edge-water habitat. The historical range retraction and habitat iii restrictions of P. emarginata within both streams, and the decline in the Cedar Creek population, indicate this is a rare species vulnerable to extirpation from Kansas.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".