02166nas a2200157 4500008004100000245014200041210006900183300001600252490000700268520160400275100001801879700001701897700001701914700001501931856006201946 2016 eng d00aThe first to arrive and the last to leave: colonisation and extinction dynamics of common and rare fishes in intermittent prairie streams0 afirst to arrive and the last to leave colonisation and extinctio a1321–13340 v613 a

1. The objectives of our research were to examine commonness–rarity patterns in fish communities in networks of intermittent streams. We quantified species abundance distributions and the importance of nestedness and turnover to community dissimilarity and then related commonness to colonisation, extinction and physiological tolerance. Patterns and relationships were evaluated spatially among sites and temporally within sites during non-drought and drought periods in tallgrass prairie streams of eastern Kansas, U.S.A. 2. Supra-seasonal drought during 2011–2013 resulted in complete or partial drying of some sites and provided an opportunity to evaluate whether commonness was predictive of rather than predicted by colonisation and extinction. Abundance was used to predict re-colonisation in desiccated reaches and persistence in drying pools. 3. Few species were common, while most were rare regardless of drought, and nestedness drove community dissimilarity across sites. Common species had higher colonisation and lower extinction than rarer species, but physiological tolerance was unrelated to commonness. 4. Abundant species were generally the first to re-colonise desiccated reaches, but pre-drought abun-dance did not predict persistence in partially desiccated reaches. 5. Although common species were the first to colonise and the last to go extinct, we were unable to determine whether commonness was predictive of rather than predicted by colonisation and extinc-tion. Regardless, our study demonstrates linkages among commonness, colonisation and extinction.

1 aWhitney, J.E.1 aGido, K., B.1 aMartin, E.C.1 aHase, K.J. uhttps://onlinelibrary.wiley.com/doi/abs/10.1111/fwb.1266802323nas a2200205 4500008004100000245010700041210006900148300001300217490000700230520166000237653002901897653001401926653002001940653001601960653002401976100001602000700001802016700001702034856006602051 2015 eng d00aThermal performance of larval longfin dace (Agosia chrysogaster), with implications for climate change0 aThermal performance of larval longfin dace Agosia chrysogaster w a395 -4040 v983 a

Temperature is an important factor affecting the distribution of freshwater fishes. The longfin dace (Agosia chrysogaster) is endemic to the Gila River basin of the southwestern USA and northern Mexico and occupies a range of thermal environments from cool mountain tributaries to warm desert rivers but information about its thermal biology is limited, particularly for larvae. We quantified the effect of rearing temperature on survival, growth capacity, and critical thermal maximum (CTM) of larval longfin dace. Broodstocks of longfin dace were collected from two sites in the upper Gila River in New Mexico from which larvae were hatched and reared for 22 days in indoor aquaria at constant temperatures ranging from 18.0 to 31.0 °C. Growth capacity peaked at 27.0 °C and was 21 % greater for larvae hatched from the upstream compared to the downstream broodstock, indicating intraspecific variability in growth capacity. CTM increased with rearing temperature and ranged from 33.9 to 39.9 °C, indicating that thermal acclimation influences maximum thermal tolerance. CTM and acclimation response ratio of larvae are lower than those of adult longfin dace measured in a previous study, suggesting that larvae are more sensitive and less responsive to thermal stress than adults. Water temperatures in 2012 from six sites in the upper Gila River basin did not exceed 27.0 °C and larval growth capacities in May of 2012 ranged from 5 to 28 % of the maximum growth capacity. We assert that rising temperatures may increase larval growth rates, although this will depend on resource limitation and shifts in community interactions.

10aCritical thermal maximum10aGilaRiver10aGrowth capacity10aLarval fish10aThermal acclimation1 aTroia, M.J.1 aWhitney, J.E.1 aGido, K., B. uhttps://link.springer.com/article/10.1007%2Fs10641-014-0270-701331nas a2200145 4500008004100000245012900041210006900170300001200239490000700251520082600258100001601084700001801100700001701118856005001135 2014 eng d00aAlternative spawning strategy and temperature for larval emergence of longfin dace (Agosia chrysogaster) in stream mesocosms0 aAlternative spawning strategy and temperature for larval emergen a277-2800 v593 a

To determine if the strategy of spawning in saucer-like depressions is obligate or facultative for longfin dace (Agosia chrysogaster), we collected adults from four sites in the upper Gila River (southwestern New Mexico), stocked them in separate outdoor stream-mesocosms lined with cobble substrate, and made daily observations for the presence of saucer-nests and hatched larvae. Larvae were observed from three of the four mesocosms and emerged at temperatures ranging from 19.2–24.0°C. The absence of saucer-nests in all mesocosms throughout the study indicates that longfin dace can spawn over cobble substrate and have larvae hatch successfully, suggesting that longfin dace can use an alternate spawning strategy when sand substrate is not available for construction of saucer-nests.

1 aTroia, M.J.1 aWhitney, J.E.1 aGido, K., B. uhttp://www.bioone.org/doi/10.1894/N03-MP-09.102208nas a2200145 4500008004100000245007600041210006900117300001100186490000800197520159500205100001501800700001801815700001701833856021201850 2013 eng d00aHabitat associations of stream fishes in a rare and declining ecosystem0 aHabitat associations of stream fishes in a rare and declining ec a39 -510 v1703 a

Describing fish habitat associations and their relevance to conservation remains a central challenge in stream fish ecology. Unfortunately, there are limited opportunities to investigate these associations in unaltered systems and identify critical habitats used by native fishes. Investigation of fish habitat associations in tallgrass prairie is especially vital, owing to their widespread destruction. Our study aim was to identify habitat factors associated with the distribution and density of fishes in two protected tallgrass prairie stream watersheds in eastern Kansas: Kings Creek on the Konza Prairie Biological Station (KPBS) and Fox Creek on the Tallgrass Prairie National Preserve (TPNP). We sampled fishes and measured eight habitat variables at three sites on KPBS (2006–2011) and four sites on TPNP (2008–2011). Multiple regression suggested that species richness was positively associated with pool area (partial r  =  0.70) and discharge (partial r  =  0.50) in Fox Creek (df  =  15, Adj. R2  =  0.60, P < 0.001). In Kings Creek, species richness was only associated with pool area (df  =  17, R2  =  0.44, P < 0.001). Redundancy analyses showed common prairie fish species exhibit ontogenetic habitat associations, partitioning adults in deep and juveniles in shallow pools. Strong species area relationships in these minimally altered systems indicates large volume habitats have greater species richness, suggesting water diversions or extractions that reduce habitat are likely to cause declines in native biodiversity.

1 aMartin, E.1 aWhitney, J.E.1 aGido, K., B. uhttps://bioone.org/journals/the-american-midland-naturalist/volume-170/issue-1/0003-0031-170.1.39/Habitat-Associations-of-Stream-Fishes-in-Protected-Tallgrass-Prairie-Streams/10.1674/0003-0031-170.1.39.short