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Tuesday, February 7 • 6:00pm - 9:00pm
Poster Display. Brood Rearing Resource Selection of Greater Sage-Grouse on the Eastern Fringe of Their Range

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AUTHORS: Lindsey Bischoff, South Dakota State University; Dr. Andrew Gregory, Bowling Green State University; Dr. Jonathan Jenks, South Dakota State University; Travis Runia 

ABSTRACT: Greater Sage-Grouse (Centrocercus urophasianus) are a species of conservation concern throughout the Intermountain West, and have been nominated for listing under provisions of the US Endangered Species Act eight times. Consequently, numerous studies have documented drivers of demographic performance at the core of their distribution; however, relatively few studies have examined sage-grouse inhabiting the eastern extent of their range in South Dakota.  Identifying sage-grouse resource selection during the critical brood rearing period can enhance management of the species and their habitat. In the spring of 2016, we monitored 27 radio-collared female sage-grouse. We detected 20 nests, seven of which successfully hatched. We located broods 2 times per week for the first four weeks following hatch. We indexed vegetation structure using Daubenmire frames and Robel poles, and collected arthropods via pitfall trapping and sweep netting weekly at used sites, as well as two paired random sites within 1.55km of each used site. This resulted in a total of 21 use sites and 42 paired random sites being sampled. Arthropods were grouped into the following orders to be counted and weighed; Coleoptera, Orthoptera, and Hymenoptera and “others”. Vegetation was compared among brood use sites and random sites using a MANOVA test. Brood sites were significantly different from random sites (p=0.034), specifically, differing in Robel readings (p=0.0004) and grass height (p=0.0002). We used a Wilcoxon rank sum test and MANOVA to determine if arthropod count and mass differed between brood sites and random sites. The only significant variable between used and random sites was the number of “other” arthropods collected (p=0.052).  Understanding sage-grouse resource selection during the brood rearing period may help us assess current agricultural and other land management practices while mitigating anthropogenic land modification. 

Tuesday February 7, 2017 6:00pm - 9:00pm CST
Lancaster Ballroom

Attendees (2)