HABITAT SELECTION IN A CHANGING ENVIRONMENT: THE RELATIONSHIP BETWEEN HABITAT ALTERATION AND SPOTTED OWL TERRITORY OCCUPANCY AND BREEDING DISPERSAL

The Condor ◽  
2007 ◽  
Vol 109 (3) ◽  
pp. 566 ◽  
Author(s):  
MARK E. SEAMANS ◽  
R.J. GUTIÉRREZ
Keyword(s):  
Habitat Selection ◽  
Habitat Alteration ◽  
Breeding Dispersal ◽  
Changing Environment ◽  
Spotted Owl ◽  
The Relationship ◽  
Territory Occupancy

scholarly journals Habitat Selection in a Changing Environment: The Relationship Between Habitat Alteration and Spotted Owl Territory Occupancy and Breeding Dispersal

The Condor ◽  
2007 ◽  
Vol 109 (3) ◽  
pp. 566-576 ◽  
Author(s):  
Mark E. Seamans ◽  
R.J. Gutiérrez
Keyword(s):  
Habitat Selection ◽  
Sierra Nevada ◽  
Coniferous Forest ◽  
Canopy Cover ◽  
Habitat Alteration ◽  
Breeding Dispersal ◽  
Conifer Forest ◽  
Avian Behavior ◽  
Spotted Owl ◽  
The Relationship

Abstract Abstract. Understanding the effect of habitat alteration on avian behavior is important for understanding a species' ecology and ensuring its conservation. Therefore, we examined the relationship between Spotted Owl habitat selection and variation in habitat in the Sierra Nevada. We estimated habitat selection by modeling the probability of territory colonization (γ), territory extinction (ε), and breeding dispersal in relation to the amount of mature conifer forest within and among territories. Alteration of ≥20 ha of mature conifer forest (coniferous forest with >70% canopy cover dominated by medium [30.4–60.9 cm dbh] and large [>60.9 cm dbh] trees) within individual territories (n  =  66) was negatively related to territory colonization and positively related to breeding dispersal probability. Although territory extinction was negatively related to the amount of mature conifer forest, it was not clear whether this relationship was due to variation of mature conifer forest within or among territories. Although modeling results for territory colonization and extinction generally supported the hypothesis that individuals are “ideal” when selecting a habitat in the sense that they settle in the highest-quality site available, we did not find a clear benefit in terms of habitat quality for Spotted Owls that exhibited breeding dispersal.

scholarly journals Meta-replication reveals nonstationarity in multi-scale habitat selection of Mexican Spotted Owl

The Condor ◽  
2017 ◽  
Vol 119 (4) ◽  
pp. 641-658 ◽  
Author(s):  
Ho Yi Wan ◽  
Kevin McGarigal ◽  
Joseph L. Ganey ◽  
Valentin Lauret ◽  
Brad C. Timm ◽  
...  
Keyword(s):  
Habitat Selection ◽  
Spotted Owl ◽  
Multi Scale ◽  
Selection Of

California spotted owl habitat selection in a fire-managed landscape suggests conservation benefit of restoring historical fire regimes

2021 ◽  
Vol 479 ◽  
pp. 118576
Author(s):  
Anu Kramer ◽  
Gavin M. Jones ◽  
Sheila A. Whitmore ◽  
John J. Keane ◽  
Fidelis A. Atuo ◽  
...  
Keyword(s):  
Habitat Selection ◽  
Fire Regimes ◽  
Spotted Owl ◽  
California Spotted Owl

The importance of superior-quality wildlife habitats

2004 ◽  
Vol 80 (1) ◽  
pp. 75-81 ◽  
Author(s):  
Ian D Thompson
Keyword(s):  
Habitat Selection ◽  
Habitat Quality ◽  
Population Level ◽  
Individual Fitness ◽  
Animal Populations ◽  
Cumulative Change ◽  
Few Data ◽  
Managed Landscapes ◽  
The Relationship

While animals may use many habitat types, relatively few are preferred and fewer yet are superior in quality (referring to individual fitness as the measure of quality). Historical reduction in habitat quality for some wildlife species has occurred such that we may now have limited reference to original superior-quality habitats. As time passes, managers may be unaware that superior habitats are slowly disappearing and that the slow but cumulative change is significant to a species at the population level. The perception of superior-quality habitat also changes with each successive generation of managers based on their experiences. This paper raises the concern that retrospective work may often be required to determine past forest habitats and associated animal populations to avoid the risk of falling into a trap of not recognizing ever-declining habitat quality through time and relegating animals to what is in fact much poorer quality habitat than those to which they are actually best adapted. Further, the relationship between relative abundance and habitat quality may often be uncertain owing to maladaptive habitat selection by animals, inappropriate survey timing or interannual population differences. While we have begun to appreciate aspects of habitat selection for many forest species, few data are yet available that relate selected habitats to fitness of individual animals. Hence, while we may have models to predict habitat use, considerable research remains to be done to be able to predict long-term sustainability of species in managed landscapes. Key words: habitat quality, forest management, sustainability, biodiversity

Breeding Dispersal In the California Spotted Owl

The Condor ◽  
2006 ◽  
Vol 108 (1) ◽  
pp. 71 ◽  
Author(s):  
Jennifer A. Blakesley ◽  
David R. Anderson ◽  
Barry R. Noon
Keyword(s):  
Breeding Dispersal ◽  
Spotted Owl ◽  
California Spotted Owl

California Spotted Owl Habitat Selection in the Central Sierra Nevada

1997 ◽  
Vol 61 (4) ◽  
pp. 1281 ◽  
Author(s):  
Christine A. Moen ◽  
R. J. Gutierrez
Keyword(s):  
Habitat Selection ◽  
Sierra Nevada ◽  
Spotted Owl ◽  
California Spotted Owl

Population productivity and late breeding habitat selection by the threatened Little Bustard: the importance of grassland management

2017 ◽  
Vol 28 (4) ◽  
pp. 521-533 ◽  
Author(s):  
NUNO FARIA ◽  
MANUEL B. MORALES
Keyword(s):  
Habitat Selection ◽  
Species Conservation ◽  
Grassland Management ◽  
Breeding Habitat ◽  
Breeding Period ◽  
Tetrax Tetrax ◽  
Species Population ◽  
Suitable Habitats ◽  
Stocking Rates ◽  
The Relationship

SummaryWe investigated population productivity and habitat selection of the Little BustardTetrax tetraxin the late breeding period, in grassland-dominated landscapes of south-west Iberia. Specifically, our goals were to investigate how these parameters are influenced by the management of (1) grazing and (2) hay production. We conducted bird counts from 22 June to 4 July (2012 to 2016) using low speed 4x4 car surveys. The relationship between the density of the species, population productivity and farm management (grazing and haying) was evaluated using Generalized Linear Mixed Models and Kruskal-Wallis tests. Male and female densities were significantly higher in short vegetation compared to all other types of vegetation considered, but population productivity was similar in short and medium vegetation. Hay stubbles were found to be unattractive for the species. The availability of suitable habitats depends on the timing of grazing, notably of seasonal (spring) grazing. Species density was higher in fields ungrazed during winter and with moderate to high stocking rates in spring (around 0.8 LU/ha or higher), depending, at least for males and females, on each year’s weather characteristics. We conclude that low to moderate stocking rates during winter and spring are essential to ensure successful breeding and thus population persistence. Current levels of haying in our study area are detrimental for the species’ conservation.

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