Genetic Structure of Mexican Spotted Owl (Strix occidentalis lucida) Populations in a Fragmented Landscape (Estructura Genética de las Poblaciones de Strix occidentalis lucida en un Paisaje Fragmentado)

The Auk ◽  
2006 ◽  
Vol 123 (4) ◽  
pp. 1090-1102
Author(s):  
George F. Barrowclough ◽  
Jeff G. Groth ◽  
Lisa A. Mertz ◽  
R. J. Gutiérrez
Keyword(s):  
Genetic Structure ◽  
Fragmented Landscape ◽  
Spotted Owl ◽  
Strix Occidentalis ◽  
Strix Occidentalis Lucida

scholarly journals Genetic Structure of Mexican Spotted Owl (Strix Occidentalis Lucida) Populations in a Fragmented Landscape

The Auk ◽  
2006 ◽  
Vol 123 (4) ◽  
pp. 1090-1102 ◽  
Author(s):  
George F. Barrowclough ◽  
Jeff G. Groth ◽  
Lisa A. Mertz ◽  
R. J. Gutiérrez
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
Isolation By Distance ◽  
Geographic Distance ◽  
Variance Partitioning ◽  
Fragmented Landscape ◽  
Spotted Owl ◽  
Strix Occidentalis ◽  
Strix Occidentalis Lucida ◽  
Central Arizona

Abstract We used mitochondrial DNA control-region sequences to investigate the genetic structure of Mexican Spotted Owl (Strix occidentalis lucida) populations in the southwestern United States. This subspecies is federally listed as threatened, and its preferred habitat is naturally fragmented. We found that intrapopulation genetic diversity was high in all but the southeastern Arizona “sky island” populations, where it was variable. Genetic variance partitioning indicated that ≈17% of the variation was distributed among populations and 7.5% was distributed among physiographic regions. Patterns of genetic correlation with geographic distance indicated that gene flow was substantial among populations within the relatively continuous habitat zone of the Mogollon Rim-Upper Gila Mountains in central Arizona and west-central New Mexico. However, there was significant isolation-by-distance elsewhere, and estimates of genetic divergence increased exponentially with geographic distance among fragmented populations on the scale of a few hundreds of kilometers; this implies that gene flow is restricted among those habitat fragments. Genetic heterogeneity among southeastern Arizona populations suggest that they have regularly received immigrants from the central Arizona populations. The Colorado population either was larger than thought or, more likely, has continuously received immigrants from elsewhere and is not a self-sustaining population. Estructura Genética de las Poblaciones de Strix occidentalis lucida en un Paisaje Fragmentado

GENETIC STRUCTURE OF MEXICAN SPOTTED OWL (STRIX OCCIDENTALIS LUCIDA) POPULATIONS IN A FRAGMENTED LANDSCAPE

The Auk ◽  
2006 ◽  
Vol 123 (4) ◽  
pp. 1090 ◽  
Author(s):  
George F. Barrowclough ◽  
Jeff G. Groth ◽  
Lisa A. Mertz ◽  
R. J. Gutiérrez
Keyword(s):  
Genetic Structure ◽  
Fragmented Landscape ◽  
Spotted Owl ◽  
Strix Occidentalis ◽  
Strix Occidentalis Lucida

Microsatellite markers for the Mexican spotted owl (Strix occidentalis lucida)

2002 ◽  
Vol 2 (4) ◽  
pp. 446-448 ◽  
Author(s):  
Anna B. Thode ◽  
Mary Maltbie ◽  
Leslie A. Hansen ◽  
Lance D. Green ◽  
Jonathan L. Longmire
Keyword(s):  
Microsatellite Markers ◽  
Spotted Owl ◽  
Strix Occidentalis ◽  
Strix Occidentalis Lucida

scholarly journals REALIZED ECOLOGICAL NICHE OF THE MEXICAN SPOTTED OWL (Strix occidentalis lucida) IN MEXICO

2021 ◽  
Author(s):  
Martinn Emilio Pereda Solis ◽  
Manuel Armando Salazar Borunda ◽  
Pablito Marcelo López Serrano ◽  
Luis Antonio Tarango Arámbula ◽  
Jorge Armando Chávez Simental ◽  
...  
Keyword(s):  
Ecological Niche ◽  
Environmental Temperature ◽  
Realized Niche ◽  
Sierra Madre Occidental ◽  
Spotted Owl ◽  
Geographic Space ◽  
Strix Occidentalis ◽  
Sierra Madre ◽  
Strix Occidentalis Lucida ◽  
Habitat Variables

Objective: To characterize the realized niche of the Mexican spotted owl (Strix occidentalis lucida) and compare the environmental values it uses within the Mexican physiographic provinces.Design/methodology/approach: The environmental temperature variables (n =7), precipitation (n = 7) and elevation (n = 1) were extracted from 79 unique occurrences sites of S. o. lucida. These values were grouped by physiographic provinces: Sierra Madre Occidental (n = 59), Sierra Madre Oriental (n = 13) and Transversal Neovolcanic Belt (n = 6). The climate and elevation of these sites were described and compared via non-parametric Kruskal-Wallis and Bonferroni-Dunn tests (P ? 0.05).Results: The presences of the spotted owls were both, dispersed and focallydistributed, over the geographic space in Mexico. The temperature and elevation variables have similar characteristics in the assessed physiographic provinces. To be noted, the precipitation variables showed significant differences among sites.Limitations on study/implications: This study describes the environmental characteristics of the realized niche of the Mexican spotted owl; however, it isnecessary to investigate other habitat variables at a smaller scale. Findings/conclusions: The temperature and elevation environmentalcharacteristics of the ecological niche of the Mexican spotted owl was similar between physiographic provinces.

scholarly journals Distribution and Abundance of Spotted Owls in Zion National Park

1989 ◽  
Vol 13 ◽  
pp. 226-233
Author(s):  
R. Gutierrez ◽  
Douglas Call ◽  
Sarah Rinkevich
Keyword(s):  
National Park ◽  
Spotted Owl ◽  
Brood Rearing ◽  
Strix Occidentalis ◽  
Nest Sites ◽  
Zion National Park ◽  
Spotted Owls ◽  
Fledgling Success ◽  
Strix Occidentalis Lucida ◽  
Mexican Spotted Owls

The main objective of this study is to estimate the distribution, habitat use, and reproductive status of Mexican spotted owls (Strix occidentalis lucida) in Zion National Park. This information will allow managers to coordinate park activities that potentially conflict with nest sites, roost sites, or brood rearing habitats. Other objectives of this study are to estimate spotted owl food habits and fledgling success, and to compare these findings with other North American spotted owl populations.

scholarly journals Mexican Spotted Owl (Strix Occidentalis) Population Dynamics: Influence of Climatic Variation on Survival and Reproduction

The Auk ◽  
2002 ◽  
Vol 119 (2) ◽  
pp. 321-334 ◽  
Author(s):  
Mark E. Seamans ◽  
R. J. Gutiérrez ◽  
Christopher A. May
Keyword(s):  
New Mexico ◽  
Reproductive Output ◽  
Monsoon Season ◽  
Life History Strategy ◽  
Climatic Variation ◽  
Spotted Owl ◽  
Strix Occidentalis ◽  
Spotted Owls ◽  
Survival And Reproduction ◽  
Strix Occidentalis Lucida

Abstract Understanding the mechanisms causing temporal variability in demographic parameters is essential to understanding fluctuations in populations. As part of a long-term demographic study, we evaluated influence of climate on Mexican Spotted Owl (Strix occidentalis lucida) annual survival and reproduction in two study areas, one in Arizona and one in New Mexico. Spotted Owl survival in New Mexico and reproductive output in both study areas were positively related to total amounts of precipitation from the previous year, previous winter, or monsoon season. For both study areas, temporal process variation in reproductive output (CV[R] = 51.2 and 75.2% for Arizona and New Mexico, respectively) was greater than that for survival (CV[ϕ] = 12.9 and 7.1% for Arizona and New Mexico, respectively). Precipitation from the previous year explained 73% of σ̂2temporal reproductive output for Arizona owls and precipitation from the previous monsoon explained 42% of σ̂2temporal in reproductive output for New Mexico owls. Precipitation from the previous monsoon season explained 53% of σ̂2temporal in Arizona owl survival and precipitation from the previous winter explained 56% of σ̂2temporal in New Mexico owl survival. The two populations of Spotted Owls we studied appeared to have the same life-history strategy hypothesized for a population of Northern Spotted Owls (S. o. caurina), although the Mexican subspecies apparently responded quite differently to climatic variation.

Distribution Modeling of Mexican Spotted Owl (Strix occidentalis lucida) In Mexico

2021 ◽  
Author(s):  
Manuel A. Salazar-Borunda ◽  
José H. Martínez-Guerrero ◽  
Luis A. Tarango-Arámbula ◽  
Pablito M. López-Serrano ◽  
Martin E. Pereda-Solís
Keyword(s):  
Predictive Accuracy ◽  
Population Monitoring ◽  
The United States ◽  
Distribution Model ◽  
Maximum Temperature ◽  
Rapid Decline ◽  
Spotted Owl ◽  
Strix Occidentalis ◽  
Sierra Madre ◽  
Strix Occidentalis Lucida

ABSTRACT The Mexican Spotted Owl (Strix occidentalis lucida; hereafter spotted owl) is discontinuously distributed in the United States and Mexico. It is an understudied raptor and categorized as near threatened, with populations in rapid decline. Defining the distribution of the spotted owl can help delineate priority areas for monitoring and research. Using the Maxent algorithm, with seven climatic variables and 153 owl presence records, we generated the potential distribution of spotted owl in Mexico. Our distribution model had high predictive accuracy and defined potential areas in the Sierra Madre Occidental, Sierra Madre Oriental, and the Transverse Neovolcanic Belt. These areas were concentrated in the states of Durango, Zacatecas, Jalisco, Aguascalientes, and Chihuahua, as well as within four protected natural areas. Four weather variables contributed 81.8% to the model's prediction: mean diurnal temperature range (BIO 2, 33.5%), maximum temperature of the warmest month (BIO 5, 30.4%), mean temperature of the coldest quarter (BIO 11, 10.5%) and the amount of precipitation in the wettest month (BIO 13, 7.4%). We recommend population monitoring in areas of climatic suitability predicted by the model to improve knowledge about the status of the Mexican Spotted Owl.

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