Adolfo G Navarro-Sigüenza

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• Dr.
• Professor (Full) at National Autonomous University of Mexico

The spatial configuration and management of agricultural and other land-use practices can affect ecological assemblages. However, the differences in how resident and migratory birds respond to land-use are remain unclear, hindering our understanding of bird biodiversity responses to land use. In a tropical moist broadleaf forest landscape of southe...

Background The topographic complexity and wide range of environmental conditions of the Neotropical region have allowed the evolution of the most diverse avifauna in the world. Distributional patterns within this avian diversity mirror this complexity, and many species show allopatric distributions in environmentally continuous regions. Here, we us...

Here, we aimed to assess the role of historical (climate events) and the current geographical and ecological features in the evolutionary history of a clade of New World jays. Using an ellipsoid-based approach relying on environmental climatic layers and occurrence data, we tested whether closely related taxa in the clade Cyanocorax colliei + C. fo...

The spatial configuration and management of agricultural and other land-use practices can affect ecological assemblages, but how resident and migratory species respond to land uses is not well known, hindering our understanding of the effects of land use on biodiversity. Here, we compare alpha and beta diversity and ecosystem functioning for reside...

Evaluamos la diversidad de pastos nativos, pastos no nativos y aves de pastizal en el Desierto Chihuahuense en un contexto histórico-ambiental de presión antropogénica en los periodos de 1930-1964, 1965-1981 y 1982-2019. Analizamos la riqueza regional, la diversidad beta y la composición de 41 especies de aves de pastizal, 149 especies de pastos na...

An ongoing challenge in evolutionary and ecological research focuses on testing biogeographic hypotheses for the understanding of both species' distributional patterns and of the factors influencing range limits. In this study, we described the climatic niches of Neotropical humid montane forest birds through the analysis of factors driving their e...

Traditional-homegardens are important for the food security, economy, and culture of rural communities, but also contributing to biodiversity conservation. The objective of this study was to evaluate the role of traditional-homegardens as a refuge for birds, how the birds used them, and which of their attributes were associated with the frequency o...

The monk parakeet (Myiopsitta monachus) and the Eurasian collared dove (Streptopelia decaocto) are two of the most prevalent invasive species globally due to their high dispersal ability. Since these birds were first recorded (1999 for the monk parakeet and 2013 for Eurasian collared dove) in the Mexico City Metropolitan Area (MCMA), both species h...

Here, we explored how variations in the allopatric speciation scenario, specifically ecological vs. vicariant allopatry, relate to climatic niche change in sister species. We selected two sister species pairs of North American hummingbirds (Calypte anna, C. costae, Basilinna leucotis, B. xantusii) that diverged 2.5 and 3.6 million years ago, under...

Increasing in human population causes expansion of urban areas, which threatens forest lands and the biodiversity they harbor. Greenspaces act a critical role maintaining bird diversity within urban areas. Here, we evaluated the effect of spatial characteristics of urban greenspaces on bird species richness to identify the role of greenspace design...

Presentamos un análisis de la diversidad y de los patrones biogeográficos de 260 especies de aves residentes de los bosques tropicales de México, realizado a partir de datos históricos (recolectados entre el siglo XVIII y 2007) y registros de presencia de la última década (2013-2023). Realizamos comparaciones del número y cambio de composición de e...

We characterize the taxonomic and functional diversity of waterbird communities in mangrove forests of 23 coastal lagoons in the southern Mexican Pacific coast, to evaluate the hypothesis of decline of taxonomic and functional richness of waterbird communities in the face of loss of natural habitat cover and increased fragmentation. We quantified p...

Due to a complex geological and biotic history, the Isthmus of Tehuantepec (IT), has been long recognized as a driver for the evolutionary divergence of numerous lowland and highland taxa. Widely distributed in the lowlands of the American continent, the White-Tipped Dove (Leptotila verreauxi) is a polytypic species with 13 recognized subspecies. F...

Este artículo contiene la lista actualizada de las especies de aves que se distribuyen en la provincia biogeográfica Sierra Madre del Sur (SMS), ésta se elaboró con base en los registros de aves con ejemplares depositados en colecciones científicas, datos observacionales, literatura científica y trabajo de campo original desarrollado desde 1983. La...

Migratory birds move geographically by tracking specific climatic conditions through time. However, we lack information about the climatic conditions birds are tracking, especially in intratropical migrants, whose movements are contained inside the tropics. The Yellow-green Vireo Vireo flavoviridis is an intratropical migrant whose migration patter...

The Military Macaw (Ara militaris) is an endangered bird species with disjunct geographic distribution across the Neotropics, consisting of three recognized subspecies: One in Mexico (A. m. mexicanus) and two in South America (A. m. militaris and A. m. bolivianus). However, due to the limited phenotypic differentiation between these allopatric taxa...

Understanding the factors underlying bird invasions is crucial for their management. Here, the invasion processes of Mexico by the European Starling (Sturnus vulgaris) and the Eurasian Collared-Dove (Streptopelia decaocto) are analyzed. A 30 × 30 km grid-cell map with the presence/absence of both species was generated using citizen-science data to...

Pollinators are currently the focus of international concern, as numerous studies have documented declines in their diversity and abundance. Pollinator conservation has therefore become an international priority. We selected 815 pollinator species (including bats, bees, hummingbirds, and hawkmoths) inhabiting the southern United States, Mexico and...

Artículo publicado en la Revista de la Universidad de México: https://www.revistadelauniversidad.mx/articles/beca2241-e2d3-4daf-99a2-d7860d5fe95a/los-polinizadores-de-mexico

Genetic differentiation between and within natural populations is the result of the joint effects of neutral and adaptative processes. In addition, the spatial arrangement of the landscape promotes connectivity or creates barriers to gene flow, directly affecting speciation processes. In this study, we carried out a landscape genomics analysis usin...

Mexico’s megadiverse avifauna includes many endemic taxa and unique diversity patterns, as well as species that are widely distributed across the Americas. Of the roughly 10,500 bird species currently recognized worldwide, about 11% are found in Mexico, and more than 200 species are considered endemic. However, according to national and internation...

El bosque mesófilo de montaña (BMM) es catalogado como un ambiente altamente rico en especies de flora y fauna, y con un alto número de endemismos; del mismo modo, ha sido considerado como uno de los ecosistemas más amenazados. En el presente trabajo se hace una reseña de las principales problemáticas que enfrenta este tipo de vegetación así como l...

The taxonomic and functional diversity of bird assemblages is determined by diverse ecological and evolutionary processes. As species establish, biotic and abiotic conditions change, shaping the processes of succession or colonization. Sometimes these processes are altered by catastrophic events that impact species in different ways, functioning as...

Although anthropogenic climate change (ACC) is a global phenomenon affecting all ecosystems, its effects are especially relevant in certain ecosystems, such as tropical montane forests. Responses of montane species to ACC in Mesoamerica remain unclear, limiting our ability to assess their vulnerability and the impacts on these ecosystems overall. T...

Identifying species' extinction risks and understanding their ecological associations are considered critical steps for achieving long-term conservation of biodiversity in the face of global changes. We evaluated the potential impact of global climate change (GCC) on the co-distribution patterns of 12 Mexican endemic hummingbirds and 118 plants the...

Deterministic processes are fundamental in structuring the bird assemblages of the Colima Volcanic Complex, an area of high endemism, migration, and taxonomic turnover, but also for its volcanic activity, complex elevational gradient, and vegetation types. Herein we describe the bird assemblages of Colima Volcanic Complex and the ecological and bio...

Mining is present in all major biomes worldwide and overlaps strongly with areas of importance for bird conservation. Mining causes multiple types of environmental disturbance, including habitat alteration, increased human presence, and persistent heavy metal pollution. Feather coloration and fluctuating asymmetry (random deviation from perfect sym...

We explored the relationship between haemosporidian infection (infected vs. uninfected), parasite load, Heterophil‐Lymphocyte ratio, body condition, and vocal behaviour of the Rufous‐naped Wren Campylorhynchus rufinucha. Our results, albeit based on a small sample size, showed no evidence of an association between vocal behaviour and infection stat...

The Squirrel Cuckoo (Piaya cayana) is a widely distributed neotropical species with 14 recognized subspecies. Two parapatric subspecies are distributed in Mexico. P. c. mexicana is endemic to the seasonally dry tropical forests of western Mexico, and P. c. thermophila is found in humid forests from eastern Mexico to western Colombia. The 2 taxa hav...

Biodiversity inventory is among the major challenges for conservation biology in the face of global change. Species exist in two spaces that are linked in the so‐called Hutchinsonian Duality: distributions in geographical space and ecological niches in environmental space. We explore implications of using distinct methods to select locations for bi...

Studies of geographic variation of bird vocalizations facilitate the understanding of species' divergence and evolutionary histories, as vocal traits vary in response to different factors including the environment, morphology, culture, and inheritance. The Acorn Woodpecker (Melanerpes formicivorus) is a non-passerine species of the family Picidae,...

Here, we report new distributional information of the Aztec Rail (Rallus tenuirostris), a Mexican endemic that inhabits freshwater marshes throughout the highlands of central Mexico. We found an unidentified rail population during opportunistic area-search surveys between February and May in 2016 and 2017 along the San Pedro and Conchos rivers in C...

The Velazquez Woodpecker Melanerpes santacruzi is a highly polytypic species distributed from east-central Mexico to northern Nicaragua. The ample variation in body size, barring of the plumage, and the coloration of nasal tufts, neck, and belly have fueled debates about the taxonomy and evolutionary history of the species; however, the processes g...

Agriculture, cattle grazing, and human settlements negatively affect bird biodiversity, driving the loss of ecologically specialized species and favoring the dominance of generalists. Because ecological pressures define organisms’ success by acting on their intrinsic traits, biodiversity loss due to anthropization might cause directional trait shif...

en The Mesoamerican dry forests (MDF), rich in species and in endemic taxa, are distributed nearly continuously nearly continuously along the American Pacific slope from Mexico to Costa Rica; however, several of the bird species inhabiting the MDF show clear phenotypic differentiation recognized through the description of subspecies. There are two...

The Wood Stork Mycteria americana is a rare resident bird species in the Caribbean, where it has small population sizes and reduced genetic variability. In the present study, we inferred the mating systems of the only two breeding colonies of Wood Stork known in the Caribbean, which are located in two of its most important wetlands: the Zapata Swam...

Metal mining causes serious ecological disturbance, due partly to heavy metal (HM) pollution that can accumulate at mining sites themselves and be dispersed downstream as runoff. Plumage coloration is important in birds' social and ecological interactions and sensitive to environmental stressors, and several local-scale studies have found decreased...

Increasing evidence indicates that distribution of Neotropical seasonally dry forests (NSDFs) and the survival of the species and communities that inhabit them have been negatively affected by land-use modifications and global climate change (GCC). Protected Areas (PAs) in the region are inefficient and insufficient, and these human-driven threats...

Global climate change (GCC) is one of the most critical threats to biodiversity. We assessed how it might disrupt the spatio-temporal diversity dimensions of avifauna associated with endangered Neotropical seasonally dry forests (NSDF). We used ecological niche modeling estimating the geographic distributions of 151 highly vulnerable bird species (...

Tropical landscape connectivity and matrix quality near large stands of primary forest are important factors that dictate biodiversity trends in communities. Suitable matrix management surrounding primary forest may help conserve biodiversity, but areas with poor matrix management need attention to determine their long-term viability to support nat...

Several lines of evidence support the hypothesis that abiotic and biotic factors directly or indirectly control species' distributions. Despite the importance of assessing the environmental factors governing species' distributions, it is not clear how such factors influence migratory species. We evaluated environmental factors related to the nonbre...

Definition of the leapfrog pattern: Two populations of a species, whose individuals are very similar in appearance, are geographically separated from each other by intervening populations of the same species whose individuals are very different from them in appearance (Remsen, 1984). Background: Three distantly related Andean passerines (Thlypopsis...

We analysed the phylogeographic structure of five resident bird lineages distributed in the seasonally dry tropical forests (SDTF) of Mesoamerica to test whether they show patterns of synchronous and geographically coincident genetic divergence during the Quaternary. We generated phylogenetic trees, estimated divergence times and analysed the genet...

Aim: To assess the representativeness values of Mesoamerican endemic birds within the current network of protected areas (PAs) to determine high-priority and complementary conservation areas to maximize the long-term protection of species. Location: From central Mexico to southern Panama. Methods: We selected 180 bird species that are geographica...

The identification of mechanisms that have generated biodiversity is one of the major tasks in biogeography and evolutionary biology. Here, using a set of environmental variables and historical presence records, we assessed whether closely related allopatric lineages in the Arremon brunneinucha (Aves: Passerellidae) complex are either more ecologic...

Humid tropical forests in Mesoamerica are distributed along the Atlantic slope and, in scattered locations, along the Mexican Pacific slope. These poorly explored Mexican forests include microendemic bird species. Two species in the genus Dendrocolaptes occur in lowland and foothill humid tropical forests of Mesoamerica. One of these, D. sanctithom...

Many biotic groups have been proposed as biodiversity surrogates; however, using different taxa could provide complementary information for choosing conservation priorities. There are two general ways to evaluate the performance of surrogates: (1) using cross-taxon congruency as an a priori test, before the application of some prioritization algori...

Acoustic signals used in animal communication play a key role in mate attraction, species recognition, and territory defense. Variation in acoustic signals may reflect population structure, lack of gene flow, and phylogenetic relationships. In birds, the study of geographic variation in acoustic signals has been useful for elucidating potential fac...

We present an analysis of the bird diversity of Misantla, Veracruz. We made an inventory from data collected through point counts, transects, non-systematic observations, identifications through vocalizations, and specimen collections using mist nets. Additionally, we made a literature search of birds of this region deposited in biological collecti...

Geographic patterns of phenotypic variation are common in birds and its study is important for the understanding of the underlying evolutionary processes taking place in a population over time and space. Here, we analyzed geographic phenotypic variation in a highly variable species, the Velazquez´s Woodpecker (Centurus santacruzi). Across the range...

We assessed the effects of global climate change as a driver of patio-temporal biodiversity patterns in bird assemblages associated to Neotropical seasonally dry forests (NSDF). For this, we estimated the geographic distribution of 719 bird species under current and future climate (2050 and 2070) projections considering two dispersal ability assump...

Background: Mesoamerica is a remarkable region with a high geological and ecological complexity. Within northern Mesoamerica, the biotic province of the Sierra Madre del Sur (SMS) in southwestern Mexico harbors exceptionally high avian endemism and diversity. Herein, we searched for spatially and temporally concordant phylogeographic patterns, in...

Estudio sobre la avifauna el estado de San Luis Potosí.

Morphological variation is strongly related to variation in the ecological characteristics and evolutionary history of each taxon. To explore how geographical variation in morphology is related to different climatic gradients and phylogenetic structure, we analyzed the variation of morphological traits (body size, bill, and wing) of 64 species of t...

The Chihuahuan Desert (CD) covers a large part of Mexico and the south-west of the United States and is one of the richest deserts in the world. Most species in arid North America are resident species (56%), but only a fraction (14%) is primarily restricted to arid environments. The highest number of species is found in shrublands, but a set of spe...

Neotropical seasonally dry forests (NSDF) are widely distributed across Latin America and the Caribbean. They possess important levels of species richness and endemism but few studies have assessed the diversity patterns and ecological relationships between the entire avifauna of these threatened forests. Thus, in order to analyse the macro-ecologi...

We explored the hypothesis that high β–diversity of terrestrial vertebrates of Mexico is associated with a high environmental heterogeneity (HEH) and identify the drivers of β–diversity at different spatial scales. We used distribution range maps of 2,513 species of amphibians, reptiles, mammals, and birds occurring in Mexico. We estimated β–divers...

Supporting information file containing Figure A and Table B. (DOCX)

Supporting information file containing the data for the analyses performed. (ZIP)

The Nuclear Central American Highlands (NCAH) is a mountainous region located within a complex transition zone. Here, we analyzed the distribution patterns of 282 species of resident land birds of the NCAH. We gathered a database with records of presence of species, from which we generated realized ecological niche models using the Genetic Algorith...

The White-naped Brushfinch ( Atlapetesalbinucha ) comprises up to eight allopatric subspecies mainly identified by the color of the underparts (gray vs. yellow belly). Yellow and gray bellied forms were long considered two different species ( A.albinucha and A.gutturalis ), but they are presently considered as one polytypic species. Previous studie...

Neotropical seasonally dry forests (NSDFs) are widely distributed and possess high levels of species richness and endemism; however, their biogeography remains only partially understood. Using species distribution modelling and parsimony analysis of endemicity, we analysed the distributional patterns of the NSDF avifauna in order to identify their...

http://web.ecologia.unam.mx/oikos3.0/index.php/todos-los-numeros/articulos-anteriores/389-aves-bosques-secos

Resumen El Alto Balsas es una región importante para la biodiversidad mexicana por sus altos niveles de recambio taxonómico y riqueza de endemismos. Desafortunadamente la pérdida de hábitat por actividades humanas amenaza su conservación. El objetivo de este trabajo es describir la biodiversidad de aves del Alto Balsas de Guerrero, a partir de dato...

La obra ornitológica de Alfredo Dugès abarca 21 publicaciones, colocándolo como el autor más prolífico y que se mantuvo publicando por más tiempo durante la primera etapa de la ornitología mexicana (1860-1910). Sus investigaciones abarcan gran cantidad de temas ornitológicos relacionados con faunística, anatomía, taxonomía, biogeografía y etología,...

Studies in evolutionary biology have commonly been focused on insular systems because of their natural geographic isolation and relatively simpler biotas. Using mitochondrial DNA sequences of 4 passerine bird species distributed in the Tres Marías Archipelago (TMA) and the nearby mainland of western Mexico-Cardinalis cardinalis, Turdus rufopalliatu...

Local adaptation seems to be one of the causes of variation in melanin‐based colors in bird plumages, related mainly to the heterogeneity of the environmental conditions along the distribution of a species. Based on comparisons of genetic (mtDNA sequences), ecological (niche models), and quantitative colorimetric data, we explored variation in plum...

Phenotypic and genetic variation are present in all species, but lineages differ in how variation is partitioned among populations. Examining phenotypic clustering and genetic structure within a phylogeographic framework can clarify which biological processes have contributed to extant biodiversity in a given lineage. Here, we investigate genetic a...

We analysed the avifauna of the Ramsar site 'Río San Pedro-Meoqui' (RSPM) according to avifaunal richness, taxonomic distinctness and conservation. We recorded a total of 199 species constituting 41.11% of the species recorded from Chihuahua and 17.30% of the Mexican avifauna. Avifauna belongs to 137 genera and 49 families, where the most species-r...

We describe the structure and the composition of the bird community in the southeastern section of Mezquital Valley, a semiarid region located in central Mexico. Fieldwork was conducted between January and December 2013, with additional records in 2014, 2015 and 2016. We recorded a total of 160 species, distributed in 118 genera, 44 families and 15...

Biotic homogenization—the erosion of biological differences between ecosystems owing to human perturbation—is a trait of the global biodiversity crisis that can affect tropical dry forest biodiversity. We tested whether biotic homogenization was occurring in resident forest bird communities in west-central Mexico. We conducted point-count surveys t...

Aim To locate areas of biogeographical transitions within the Sierra Madre Oriental ( SMO ), Mexican transition zone. Location Eastern Mexico (18° to 27° N – 90° to 96° W) and the Americas. Methods We deconstructed passerine fauna into biogeographical affinities to map their integration in the studied area. We defined and quantified two features...

Phylogenetic relationships and patterns of evolution within Melanerpes, one of the most diverse groups of New World woodpeckers (22-23 lineages), have been complicated due to complex plumages and morphological adaptations. In an attempt to resolve these issues, we obtained sequence data from four nuclear introns and two mitochondrial protein-coding...

Describimos la estructura y composición de la comunidad de aves del sureste del Valle del Mezquital, una región semiárida del centro de México. Realizamos el trabajo de campo de enero a diciembre de 2013, con registros adicionales en 2014, 2015 y 2016. Registramos en total 160 especies pertenecientes a 118 géneros, 44 familias y 15 órdenes. De ésta...

Aim Understanding patterns of endemism is a key to deciphering the history of biotas and setting conservation priorities, but resolving the complexity of distributional patterns quantitatively into areas of endemism is often a difficult task. We report here an analysis of a comprehensive biodiversity dataset for the study of endemism, including vir...

The purpose of this study was to assess how bird communities are grouped in vegetation types between the breeding and non-breeding seasons in two consecutive years as well as the relationship between bird species' distribution and the main plant communities, all in a desert wetland in northern Mexico. We used transects to determine the bird species...

Mexican ornithology has seen a curious trajectory, beginning with remarkably well documented indigenous knowledge, progressing to colonial expeditions and intensive nineteenth-century exploration. The baton passed to collectors and scientists from the United States of America around the beginning of the twentieth century, and most recently to Mexic...

Background Faunal change is a basic and fundamental element in ecology, biogeography, and conservation biology, yet vanishingly few detailed studies have documented such changes rigorously over decadal time scales. This study responds to that gap in knowledge, providing a detailed analysis of Digital Accessible Knowledge of the birds of Mexico, des...

Species' geographic distributions are mapped using various approaches for use in conservation decision-making. Some such mapping efforts have relied on modifications of coarse-resolution extent-of-occurrence maps to downscale them to fine resolutions for conservation planning. This contribution examines (1) the quality of the extent-of-occurrence m...

It is suggested that dispersal and vicariance led to speciation in Mesoamerican taxa during the Pleistocene, as a consequence of climatic fluctuations and resulting range disjunctions, but few biogeographic studies have been developed to assess their relative roles. Based on a mitochondrial DNA dataset, we analyzed the evolutionary history of Turdu...

Natural history museum collections (NHCs) represent a rich and largely untapped source of data on demography and population movements. NHC specimen records can be corrected to a crude measure of collecting effort and reflect relative population densities with a method known as abundance indices. We plotted abundance index values from georeferenced...

Animation of monthly changes in Passerina ciris abundance index values with EVI analysis of remote sensing data Figure 2 (.gif animation). Abundance index (AI) values for Passerina ciris specimens in Mexico by month, plotted against EVI analysis of remote sensing data. Red circles indicate the occurrence of P. ciris specimens, with the diameter of...

Mexico has a megadiverse avifauna that includes many endemic elements, as well as rich sets of species ranging farther north or farther south in the Americas. This avifauna, nonetheless, has suffered considerable losses as a consequence of long-term, intensive human activity across the landscape. We review what is known about the Mexican avifauna,...

Here we provide evidence to support an extension of the recognized distributional range of the Mountain Elaenia ( Elaenia frantzii ) to include southern Mexico. We collected two specimens in breeding condition in northwestern Sierra Norte de Chiapas, Mexico. Morphologic and genetic evidence support their identity as Elaenia frantzii . We compared e...