Grasshopper sparrow reproductive success and habitat use on reclaimed surface mines varies by age of reclamation

2015 ◽  
Vol 39 (3) ◽  
pp. 512-520 ◽  
Author(s):  
Petra B. Wood ◽  
Frank K. Ammer
Keyword(s):  
Reproductive Success ◽  
Habitat Use ◽  
Grasshopper Sparrow ◽  
Surface Mines

scholarly journals Does vegetation change over 28 years affect habitat use and reproductive success?

The Auk ◽  
2019 ◽  
Vol 137 (1) ◽  
Author(s):  
Karolina Fierro-Calderón ◽  
Thomas E Martin
Keyword(s):  
Reproductive Success ◽  
Habitat Use ◽  
Nest Survival ◽  
Selection Function ◽  
Patch Use ◽  
Fitness Consequences ◽  
Long Term Changes ◽  
Changes Over Time ◽  
Over Time

Abstract Individuals should prefer and use habitats that confer high fitness, but habitat use is not always adaptive. Vegetation in natural landscapes changes gradually and the ability of species to adaptively adjust their habitat use to long-term changes is largely unstudied. We studied nest patch and territory use over 28 yr in Orange-crowned Warblers (Oreothlypis celata) in a system that has undergone natural long-term changes in vegetation. Abundance of maple (Acer grandidentatum), its preferred nesting habitat, gradually declined from 1987 to 2015. We examined whether habitat use and its fitness consequences changed as the availability of preferred habitat decreased. We used resource selection function models to determine changes over time in the probability of using a nest patch given available patches, and the probability of using a territory given available territories. We estimated nest survival to evaluate changes over time in the fitness consequences of nest patch use. We also compared habitat use (nest patch and territory) and fitness (nest survival) between areas with naturally reduced abundance of maple and experimentally increased abundance of maple (fenced areas). Nest patch use depended on maple abundance and did not change drastically across 28 yr, even though the availability of preferred maple patches decreased over time. In contrast, nest survival tended to decrease over time. We did not see differences in nest patch use and nest survival between unfenced and fenced areas, unlike territory use, which increased with the abundance of maple in fenced areas and decreased in unfenced areas. Our study depicts one example of relatively unchanged habitat use in the face of decreased availability of preferred vegetation across years, with a resulting decrease in reproductive success. Investigating changes in habitat use and fitness consequences for animals exposed to long-term habitat change is necessary to understand adaptive behavioral responses.

scholarly journals Woody Vegetation Removal Benefits Grassland Birds on Reclaimed Surface Mines

2019 ◽  
Vol 11 (1) ◽  
pp. 89-98
Author(s):  
Joseph M. Lautenbach ◽  
Nathan Stricker ◽  
Michael Ervin ◽  
Andy Hershner ◽  
Ryan Harris ◽  
...  
Keyword(s):  
Grassland Birds ◽  
Canopy Cover ◽  
Woody Vegetation ◽  
Herbicide Application ◽  
Yellow Warbler ◽  
Grasshopper Sparrow ◽  
Elaeagnus Umbellata ◽  
Surface Mines ◽  
Canopy Coverage ◽  
Henslow's Sparrow

Abstract Grassland birds have declined throughout North America. In the midwestern United States, reclaimed surface mines often provide expanses of contiguous grassland that support grassland birds. However, some reclaimed surface mines often experience severe woody vegetation encroachment, typically by invasive trees and shrubs, including black locust Robinia pseudoacacia, autumn olive Elaeagnus umbellata, and bush honeysuckle Lonicera spp. We conducted point-count surveys to investigate the effects of woody canopy cover and response to treatments of woody vegetation on the abundance of birds. Our treatments were a control, an herbicide application, and an herbicide application followed by cutting and shredding of standing dead woody vegetation. Estimated density of eastern meadowlark Sturnella magna, grasshopper sparrow Ammodramus savannarum, and Henslow's sparrow Centronyx henslowii was 670%, 958%, and 200%, respectively, greater on areas treated with herbicide and shredding and 279%, 666%, and 155%, respectively, greater on areas treated with herbicide-only when compared with control sites. When woody canopy cover increased from 0% to 20%, densities of eastern meadowlark, grasshopper sparrow, and Henslow's sparrow decreased by 83.9%, 74.9%, and 50.7%, respectively. Conversely, densities of eastern towhee Pipilo erythrophthalmus, prairie warbler Setophaga discolor, yellow-breasted chat Icteria virens, and yellow warbler Setophaga petechia increased 67.4%, 57.0%, 34.6%, and 117.7%, respectively, as estimated woody canopy coverage increased from 20% to 60%. Our results showed treating encroaching woody vegetation on reclaimed surface mines with herbicide and shredding increases available habitat used by grassland birds. Maintaining grasslands on reclaimed surface mines at ≤10% woody canopy coverage would be most beneficial to eastern meadowlarks, grasshopper sparrows, and Henslow's sparrows.

Piping Plover Habitat Use and Reproductive Success in North Dakota

1988 ◽  
Vol 52 (2) ◽  
pp. 266 ◽  
Author(s):  
Eleanor Prindiville Gaines ◽  
Mark R. Ryan
Keyword(s):  
Reproductive Success ◽  
Habitat Use ◽  
North Dakota ◽  
Piping Plover

Effects of Clearcutting on Habitat Use and Reproductive Success of the Ovenbird in Forested Landscapes

1996 ◽  
Vol 10 (5) ◽  
pp. 1380-1386 ◽  
Author(s):  
David I. King ◽  
Curtice R. Griffin ◽  
Richard M. Degraff
Keyword(s):  
Reproductive Success ◽  
Habitat Use ◽  
Forested Landscapes

Boldness-mediated habitat use tactics and reproductive success in a wild large herbivore

2018 ◽  
Vol 145 ◽  
pp. 107-115 ◽  
Author(s):  
Nadège C. Bonnot ◽  
Michel Goulard ◽  
A.J. Mark Hewison ◽  
Bruno Cargnelutti ◽  
Bruno Lourtet ◽  
...  
Keyword(s):  
Reproductive Success ◽  
Habitat Use ◽  
Large Herbivore

Evaluation of a Reproductive Index to Estimate Grasshopper Sparrow and Eastern Meadowlark Reproductive Success

2009 ◽  
Vol 5 (1) ◽  
Author(s):  
Donald P Althoff ◽  
Philip S Gipson ◽  
Jeffrey S Pontius ◽  
Russell D Japuntich
Keyword(s):  
Reproductive Success ◽  
Grasshopper Sparrow

Habitat use and phenology of the large insular endemic grasshopperAcrostira euphorbiae(Orthoptera: Pamphagidae)

2007 ◽  
Vol 97 (2) ◽  
pp. 117-127 ◽  
Author(s):  
H. López ◽  
M. Nogales ◽  
E. Morales ◽  
P. Oromí
Keyword(s):  
Genetic Diversity ◽  
Reproductive Success ◽  
Habitat Use ◽  
Canary Islands ◽  
Sexual Maturity ◽  
La Palma ◽  
Adult Females ◽  
Risk Of Predation ◽  
Insular Endemic ◽  
Almost All

AbstractThe habitat use and the phenology of the large grasshopperAcrostira euphorbiaeGarcía & Oromí endemic to La Palma (Canary Islands) are studied. This grasshopper is entirely dependent on the Canarian endemic shrubEuphorbia lamarckiiboth for food and to avoid predation. Adults stay on subapical branches during the day, probably to reduce the risk of predation, and climb up to the apex at night to feed. While females seem to ensure the genetic diversity of offspring by waiting for visits by different males, the latter have to move to guarantee their reproductive success. Monophagy in this species may be related to the year-round presence of tender shoots, and to the predator-repellent toxic latex found in the host plant. Unlike related species from continental areas, adults and nymphs ofA. euphorbiaeare present almost all year round, probably in adaptation to the particular climate of the islands. Nymphs are more abundant in winter, whenEuphorbialeaves are most available. However, adults are more abundant than nymphs in spring, summer and autumn. Males develop more quickly than females, an apparent reproductive strategy based on achieving sexual maturity to coincide with females undergoing imaginal moulting. Matings start immediately after adult females emerge. Densities oscillated between 73 and 193 individuals ha−1, which can be considered a low value compared with other continental pamphagid species.

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