Annika W. Walters
Wayne A. Hubert
Anna C. Senecal
2016
<p><span class="ff1 fs6"><span class="current-selection">W</span><span class="current-selection">y</span><span class="current-selection">oming</span><span class="ff5"><span class="current-selection">’</span><span class="ff1"><span class="current-selection">s</span> <span class="current-selection">P</span><span class="current-selection">owder</span> <span class="current-selection">River</span> <span class="current-selection">is</span> <span class="current-selection">considered</span> <span class="current-selection">an</span> <span class="current-selection">example</span> <span class="current-selection">of</span> <span class="current-selection">a</span> <span class="current-selection">pristine</span> <span class="current-selection">prairie</span> <span class="current-selection">river</span> <span class="current-selection">system.</span> <span class="current-selection">While </span></span></span></span><span class="current-selection">the</span> <span class="current-selection">river</span> <span class="current-selection">hosts</span> <span class="current-selection">a</span> <span class="current-selection">largely</span> <span class="current-selection">native</span> <span class="current-selection">fish</span> <span class="current-selection">assemblage</span> <span class="current-selection">and</span> <span class="current-selection">remains</span> <span class="current-selection">unimpounded</span> <span class="current-selection">over</span> <span class="current-selection">its</span> <span class="current-selection">1,146-km</span> <span class="current-selection">course</span> <span class="current-selection">to</span> <span class="current-selection">the </span><span class="current-selection">Y</span><span class="current-selection">ellowstone</span> <span class="current-selection">River</span> <span class="current-selection">confluence,</span> <span class="current-selection">the</span> <span class="current-selection">hydrologic</span> <span class="current-selection">regime</span> <span class="current-selection">has</span> <span class="current-selection">been</span> <span class="current-selection">altered</span> <span class="current-selection">through</span> <span class="current-selection">w</span><span class="current-selection">ater</span> <span class="current-selection">dive</span><span class="current-selection">rsion</span> <span class="current-selection">for </span><span class="current-selection">agriculture</span> <span class="current-selection">and</span> <span class="current-selection">natural</span> <span class="current-selection">gas</span> <span class="current-selection">extraction</span> <span class="current-selection">and</span> <span class="current-selection">there</span> <span class="current-selection">has</span> <span class="current-selection">been</span> <span class="current-selection">limited</span> <span class="current-selection">study</span> <span class="current-selection">of</span> <span class="current-selection">fish</span> <span class="current-selection">assemblage</span> <span class="current-selection">structure.</span> <span class="current-selection">W</span><span class="current-selection">e </span><span class="current-selection">analyzed</span> <span class="current-selection">fish</span> <span class="current-selection">data</span> <span class="current-selection">collected</span> <span class="current-selection">from</span> <span class="current-selection">the</span> <span class="current-selection">mainstem</span> <span class="current-selection">P</span><span class="current-selection">owder</span> <span class="current-selection">River</span> <span class="current-selection">in</span> <span class="current-selection">W</span><span class="current-selection">yoming</span> <span class="current-selection">between</span> <span class="current-selection">1896</span> <span class="current-selection">and</span> <span class="current-selection">2008.</span> <span class="current-selection">Shifts </span><span class="current-selection">in</span> <span class="current-selection">presence/absence</span> <span class="current-selection">and</span> <span class="current-selection">relative</span> <span class="current-selection">abundance</span> <span class="current-selection">of</span> <span class="current-selection">fish</span> <span class="current-selection">species,</span> <span class="current-selection">as</span> <span class="current-selection">well</span> <span class="current-selection">as</span> <span class="current-selection">fish</span> <span class="current-selection">assemblage</span> <span class="current-selection">composition,</span> <span class="current-selection">were </span><span class="current-selection">assessed</span> <span class="current-selection">among</span> <span class="current-selection">historical</span> <span class="current-selection">and</span> <span class="current-selection">recent</span> <span class="current-selection">samples.</span> <span class="current-selection">The</span> <span class="current-selection">recent</span> <span class="current-selection">P</span><span class="current-selection">owder</span> <span class="current-selection">Rive</span><span class="current-selection">r</span> <span class="current-selection">fish</span> <span class="current-selection">assemblage</span> <span class="current-selection">w</span><span class="current-selection">as</span> <span class="current-selection">characterized </span><span class="current-selection">by</span> <span class="current-selection">increased</span> <span class="current-selection">relative</span> <span class="current-selection">abundances</span> <span class="current-selection">of</span> <span class="current-selection">sand</span> <span class="current-selection">shiner</span> <span class="ff3"><span class="current-selection">Notr</span><span class="current-selection">opis</span> <span class="current-selection">stramineus</span> <span class="ff1"><span class="current-selection">and</span> <span class="current-selection">plains</span> <span class="current-selection">killifish</span> </span><span class="current-selection">Fundulus</span> <span class="current-selection">zebrinus</span><span class="ff1 current-selection">, </span></span><span class="current-selection">and</span> <span class="current-selection">decreases</span> <span class="current-selection">in</span> <span class="current-selection">sturgeon</span> <span class="current-selection">chub</span> <span class="ff3"><span class="current-selection">Macrhybopsis</span> <span class="current-selection">gelida</span></span><span class="current-selection">.</span> <span class="current-selection">Shifts</span> <span class="current-selection">in</span> <span class="current-selection">fish</span> <span class="current-selection">species</span> <span class="current-selection">relative</span> <span class="current-selection">abundance</span> <span class="current-selection">are</span> <span class="current-selection">linked</span> <span class="current-selection">to </span><span class="current-selection">their</span> <span class="current-selection">reproductive</span> <span class="current-selection">ecology</span> <span class="current-selection">with</span> <span class="current-selection">species</span> <span class="current-selection">with</span> <span class="current-selection">adhesive</span> <span class="current-selection">eggs</span> <span class="current-selection">generally</span> <span class="current-selection">increasing</span> <span class="current-selection">in</span> <span class="current-selection">relative</span> <span class="current-selection">abundance </span><span class="current-selection">while</span> <span class="current-selection">those</span> <span class="current-selection">with</span> <span class="current-selection">buoy</span><span class="current-selection">ant</span> <span class="current-selection">drifting</span> <span class="current-selection">eggs</span> <span class="current-selection">are</span> <span class="current-selection">decreasing.</span> <span class="current-selection">Assemblage</span> <span class="current-selection">shifts</span> <span class="current-selection">could</span> <span class="current-selection">be</span> <span class="current-selection">the</span> <span class="current-selection">result</span> <span class="current-selection">of</span> <span class="current-selection">landscape </span><span class="current-selection">level</span> <span class="current-selection">changes,</span> <span class="current-selection">such</span> <span class="current-selection">as</span> <span class="current-selection">the</span> <span class="current-selection">loss</span> <span class="current-selection">of</span> <span class="current-selection">extreme</span> <span class="current-selection">high</span> <span class="current-selection">and</span> <span class="current-selection">low</span> <span class="current-selection">flow</span> <span class="current-selection">events</span> <span class="current-selection">and</span> <span class="current-selection">changing</span> <span class="current-selection">land</span> <span class="current-selection">use</span> <span class="current-selection">practices.</span></p>
application/pdf
10.1890/ES14-00361.1
en
Wiley
Fish assemblage shifts in the Powder River of Wyoming: an unregulated prairie river system previously considered to be relatively pristine.
article