Factors Affecting Songbird Nest Survival in Northern Mixed-Grass Prairie

2010 ◽  
Vol 74 (2) ◽  
pp. 257-264 ◽  
Author(s):  
Courtney K. Kerns ◽  
Mark R. Ryan ◽  
Robert K. Murphy ◽  
Frank R. Thompson ◽  
Cory S. Rubin
Keyword(s):  
Nest Survival ◽  
Factors Affecting ◽  
Mixed Grass Prairie ◽  
Mixed Grass

Contrasting nest survival patterns for ducks and songbirds in northern mixed-grass prairie

2017 ◽  
Vol 81 (4) ◽  
pp. 641-651 ◽  
Author(s):  
Todd A. Grant ◽  
Terry L. Shaffer ◽  
Elizabeth M. Madden ◽  
Melvin P. Nenneman
Keyword(s):  
Nest Survival ◽  
Mixed Grass Prairie ◽  
Mixed Grass ◽  
Survival Patterns

scholarly journals Sparrow nest survival in relation to prescribed fire and woody plant invasion in a northern mixed-grass prairie

2017 ◽  
Vol 41 (3) ◽  
pp. 442-452 ◽  
Author(s):  
Robert K. Murphy ◽  
Terry L. Shaffer ◽  
Todd A. Grant ◽  
James L. Derrig ◽  
Cory S. Rubin ◽  
...  
Keyword(s):  
Prescribed Fire ◽  
Plant Invasion ◽  
Woody Plant ◽  
Nest Survival ◽  
Mixed Grass Prairie ◽  
Mixed Grass ◽  
Woody Plant Invasion

scholarly journals Mixed-Grass Prairie Passerines Exhibit Weak and Variable Responses to Patch Size

The Auk ◽  
2006 ◽  
Vol 123 (3) ◽  
pp. 807-821 ◽  
Author(s):  
Stephen K. Davis ◽  
R. Mark Brigham ◽  
Terry L. Shaffer ◽  
Paul C. James
Keyword(s):  
Tallgrass Prairie ◽  
Patch Size ◽  
Nest Survival ◽  
Bird Populations ◽  
Mixed Grass Prairie ◽  
Bird Density ◽  
Anthus Spragueii ◽  
Mixed Grass ◽  
Sprague's Pipit ◽  
Time Specific

Abstract Much of our current understanding of the demographic effects of habitat fragmentation on bird populations is derived from studies of passerines in forests and tallgrass prairie surrounded by woody vegetation. We quantified grassland bird density, nest survival, and productivity in 41 native mixed-grass prairie pastures during 1997-2000 in southern Saskatchewan, Canada. Pastures ranged in size from 18 ha to 11,600 ha and were typically surrounded by agriculture (i.e., ranching and annual cropping). Grassland passerines did not respond strongly or uniformly to patch size. Sprague's Pipit (Anthus spragueii) was the only species whose density increased with pasture size. Patch size had minimal influence on nest survival of Sprague's Pipit or Clay-colored Sparrow (Spizella pallida); whereas nest survival increased with patch size for Savannah Sparrow (Passerculus sandwichensis) and declined for Baird's Sparrow (Ammodramus bairdii), Chestnut-collared Longspur (Calcarius ornatus), and Western Meadowlark (Sturnella neglecta). Time-specific factors (i.e., nest age, date, and year) were more important predictors of nest survival than patch size. Exploratory analyses indicated that effects of edge distance, pasture shape, or landscape on nest survival were just as likely as patch-size effects. However, effects of edge on Chestnut-collared Longspurs may be governed by landscape-level factors, because nest survival decreased with distance to edge in landscapes with increased amounts of cropland. Our results indicate that mixed-grass prairie parcels ≥18 ha play a role in the conservation of several grassland passerine species currently in decline, but the conservation of Sprague's Pipit likely depends on maintaining larger tracts of native prairie. Les Passereaux des Prairies Herbacées Montrent des Réponses Faibles et Variables en Réponse à la Taille des Parcelles d'Habitats

Effects of Disturbance on Silver Sagebrush Communities in Dry Mixed-Grass Prairie

2013 ◽  
Vol 31 (3) ◽  
pp. 274-282
Author(s):  
L. K. Hickman ◽  
P. A. Desserud ◽  
B. W. Adams ◽  
C. C. Gates
Keyword(s):  
Mixed Grass Prairie ◽  
Mixed Grass

Factors Affecting Nest Survival of Greater Sage-Grouse in Northcentral Montana

2007 ◽  
Vol 71 (6) ◽  
pp. 1773-1783 ◽  
Author(s):  
BRENDAN J. MOYNAHAN ◽  
MARK S. LINDBERG ◽  
JAY J. ROTELLA ◽  
JACK WARD THOMAS
Keyword(s):  
Nest Survival ◽  
Sage Grouse ◽  
Factors Affecting

scholarly journals 179 Using a 100% Dried Distillers Grains Cube as a Supplement for Steers Grazing Mixed Grass Prairie in Oklahoma

2020 ◽  
Vol 98 (Supplement_2) ◽  
pp. 46-46
Author(s):  
Zane N Grigsby ◽  
Paul A Beck ◽  
Stacey A Gunter
Keyword(s):  
Animal Health ◽  
Late Summer ◽  
Estradiol Benzoate ◽  
Positive Control ◽  
Negative Control ◽  
Early Summer ◽  
Trenbolone Acetate ◽  
Mixed Grass Prairie ◽  
Mixed Grass ◽  
Main Plot

Abstract This research was conducted to determine effects of supplementation and implanting on BW gain by steers grazing mixed grass prairie (n = 12 pastures, 19.9 ± 0.7 ha) in northwest Oklahoma. Three main plot treatments were: 1) Negative Control (NC), no supplementation, 2) Positive Control (PC), supplemented with DDGS cubes, 1.8 kg/steer on alternate days in late summer, 3) High Supplement (HS), 1/3 increase in stocking rate with 0.75% BW supplemental DDGS cubes all season. Steers (n = 125, BW = 223.1 ± 23.2 kg) were stocked at 2.2 ha/steer for PC and NC, 1.3 ha/steer for HS. Grazing was from May 17 – September 27 (132 d). All steers were implanted with 200 mg progesterone and 20 mg estradiol benzoate (SYN, Synonvex S, Zoetis Animal Health) on May 17. On July 18 three reimplant treatments were applied: 1) no reimplant; 2) SYN; or 3) 40 mg trenbolone acetate and 8 mg estradiol (Revalor G, Merck Animal Health). Data were analyzed using the PROC MIXED in SAS as a split-plot experimental design. In early summer HS had 0.26 kg greater (P < 0.01) ADG than NC and PC. Late summer gains of PC were 0.33 kg/d more (P ≤ 0.01) than NC; and HS gained 0.49 and 0.16 kg/day more (P ≤ 0.04) than NC and PC, respectively. Gain per hectare for PC (46 kg/ha) were greater (P < 0.01) than NC (35 kg/ha) and more than doubled (P < 0.01) with HS (89 kg/ha). Reimplanting had no effect on ADG (P ≥ 0.28). Late season supplementation with PC resulted in supplemental efficiency of 2.7 kg supplement/kg added gain compared with NC. Increased stocking rates with season long supplementation in HS resulted in supplemental efficiency of 3.8 kg supplement/kg added gain per hectare. Based on these data, a 100% DDGS cube is an effective supplement option to increase BW gain during the late summer or increase carrying capacity and gain during the summer grazing period in northwestern Oklahoma.

scholarly journals Response of a mixed grass prairie to an extreme precipitation event

Ecosphere ◽  
2015 ◽  
Vol 6 (10) ◽  
pp. art172 ◽  
Author(s):  
Amy L. Concilio ◽  
Janet S. Prevéy ◽  
Peter Omasta ◽  
James O'Connor ◽  
Jesse B. Nippert ◽  
...  
Keyword(s):  
Extreme Precipitation ◽  
Extreme Precipitation Event ◽  
Precipitation Event ◽  
Mixed Grass Prairie ◽  
Mixed Grass
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