Identifying the source population of fish re-colonizing an arid-land stream following wildfire-induced extirpation using otolith microchemistry
| Autor: | Thomas F. Turner, James E. Whitney, Skyler C. Hedden, David L. Propst, G.L. Macpherson, Tyler J. Pilger, Keith B. Gido |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
geography geography.geographical_feature_category biology Speckled dace Ecology 010604 marine biology & hydrobiology Aquatic Science Agosia chrysogaster biology.organism_classification 010603 evolutionary biology 01 natural sciences Longfin Fishery medicine.anatomical_structure Otolith microchemical analysis Tributary medicine Biological dispersal Rhinichthys Otolith |
| Zdroj: | Hydrobiologia. 797:29-45 |
| ISSN: | 1573-5117 0018-8158 |
| DOI: | 10.1007/s10750-017-3143-1 |
| Popis: | Movement is necessary for re-colonization of habitats following disturbance, but methods to estimate dispersal of small-bodied fishes are limited. We evaluated the efficacy of otolith microchemistry in identifying habitat origin of longfin dace Agosia chrysogaster in the Gila River, NM, USA. Additionally, we used this method to determine the source population of speckled dace Rhinichthys osculus that re-colonized a tributary reach following wildfire-induced extirpation. We determined otolith microchemical analysis was possible after finding elevated ambient water concentrations of Mg, Mn, and Sr in the disturbed tributary both before and after wildfire relative to other source streams. These water chemistry differences allowed us to test if speckled dace were derived from downstream populations, or from those potentially persisting within refugia in the fire-affected tributary. We found that otolith signatures consistently reflected water chemistry patterns for Mn and Sr, allowing us to classify individuals to known capture locations 86% (range = 74–100%) of the time. Otolith microchemistry techniques then revealed that 88% of speckled dace that re-colonized the fire-affected tributary reach were derived from refuge populations within the tributary. Our results indicated that otolith microchemistry could be an important tool for characterizing re-colonization dynamics of fish populations residing in chemically heterogeneous stream networks. |
| Databáze: | OpenAIRE |
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