Zaida Ortega

Zaida Ortega
University of Granada | UGR · Department of Animal Biology

PhD

About

83
Publications
10,466
Reads
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344
Citations
Citations since 2016
72 Research Items
334 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
Introduction
I am currently working as a postdoctoral researcher and lecturer at the UGR (Spain). I study the effect of environmental variables in the behaviour (mainly behavioral thermoregulation, movement ecology, resource selection, and antipredatory behaviour) of vertebrates. More info: www.zaidaortega.com. I am accredited as "associate professor" (Profesora Titular) by ANECA, the National Agency for Quality Assessment and Accreditation of Spain (ref. 2021-004763).
Additional affiliations
March 2017 - January 2021
Universidade Federal de Mato Grosso do Sul
Position
  • PostDoc Position
Education
September 2011 - July 2012
Universidad de Salamanca
Field of study
  • Statistics
November 2008 - October 2015
Universidad de Salamanca
Field of study
  • Ecology
September 2006 - November 2007
Universidad de Salamanca
Field of study
  • Zoology

Publications

Publications (83)
Article
Full-text available
The study of the heterogeneity of effect sizes is a key aspect of ecological meta-analyses. Here we propose a meta-analytic methodology to study the influence of moderators in effect sizes by splitting heterogeneity: meta-partition. To introduce this methodology, we performed a meta-partition of published data about the traits that influence specie...
Article
Full-text available
Alien predators may impose a great threat to naïve prey. Ibiza wall lizards (Podarcis pityusensis) live in Ibiza, a snake-free island until 2003. We studied the lizards’ discrimination of scents of two invader snakes: one that depredates lizards, the horseshoe whip snake (Hemorrhois hippocrepis), and another that does not, the ladder snake (Rhinech...
Article
Thermal biology of lizards affects their overall physiological performance. Thus, it is crucial to study how abiotic constraints influence thermoregulation. We studied the effect of wind speed on thermoregulation in an endangered mountain lizard (Iberolacerta aurelioi). We compared two populations of lizards: one living in a sheltered rocky area an...
Article
Full-text available
Mountain lizards are highly vulnerable to climate change, and the continuous warming of their habitats could be seriously threatening their survival. We aim to compare the thermal ecology and microhabitat selection of a mountain lizard, Iberolacerta galani, and a widely distributed lizard, Podarcis bocagei, in a montane area. Both species are curre...
Chapter
A pesar de los esfuerzos realizados para promover la igualdad entre hombres y mujeres, el avance es lento en muchas áreas relacionadas con la ciencia. En el caso de la Zoología, no existen estudios específicos que lo evalúen en detalle. Nuestro objetivo fue cuantificar la brecha de género en los departamentos de Zoología de universidades españolas....
Preprint
Full-text available
Due to rapid human expansion in the last century, wildlife roadkill is becoming a concerning threat to biodiversity and human safety. The frequency of roadkill events depends on factors related to speci c traits of the road-fencing, tortuosity, or type of habitat, among others-and the animal ecology-such as activity patterns, reproductive season, t...
Article
One pivotal topic on habitat selection is to understand the influence of intrinsic and extrinsic factors on the selection process. Although the effect of some extrinsic variables and sex has been extensively studied, almost nothing is known about the effect of personality, particularly on snakes. Here we addressed the relative importance of extrins...
Preprint
Sea level rise has accelerated during recent decades, exceeding rates recorded during the previous two millennia1. Many coastal habitats and species around the globe are vanishing2. This situation is expected to worsen due to anthropogenically induced climate change. However, the magnitude and relevance of expected increase in sea level rise (SLR)...
Conference Paper
Full-text available
A brief communication in Brazilian virtual conference of the main result of hoary fox habitat selection research. We studied the space use of this vulnerable carnivore in an agroecosystem used for livestock production. We aligned foxes’ movement ecology with livestock management by searching for those habitats selected by foxes that also improve ca...
Article
Full-text available
Knowing the influence of intrinsic and environmental traits on animals' movement is a central interest of ecology and can aid to enhance management decisions. The giant anteater (Myrmecophaga tridactyla) is a vulnerable mammal that presents low capacity for physiological thermoregulation and uses forests as thermal shelters. Here, we aim to provide...
Conference Paper
Full-text available
Está demostrado que una ciencia más inclusiva produce mejores resultados en la participación y desarrollo de las mujeres en las carreras científicas y en la sociedad en general. En el ámbito universitario enfocado en el medio ambiente, las excursiones y salidas de campo son una parte esencial para el desarrollo y la puesta en práctica de las habili...
Article
Amphibian species require specific conditions for reproduction, such as cover structures and shelters, in both aquatic and terrestrial habitats, which directly influence reproductive success. A careful selection of calling sites is an important process, driving life-history strategies and tactics in amphibians. Despite this, a significant knowledge...
Article
Full-text available
Due to the rapid growth of urban environments, interactions between animals and humans in cities are increasingly common. Large mammals, such as capybaras (Hydrochoerus hydrochaeris), provide benefits to people and biodiversity of urban areas, but can also result in conflicts, such as animal–vehicle collisions or disease transmission. As a conseque...
Article
Mammals can show conspicuous behavioral responses to thermal variation, including changes in movement patterns. We used an integrative approach to understand how environmental temperature can drive the movement behavior of a mammal with low capacity for physiological thermoregulation, the giant anteater (Myrmecophaga tridactyla). We tracked 52 gian...
Article
Full-text available
Understanding how different environmental factors influence species occurrence is a key issue to address the study of natural populations. However, there is a lack of knowledge on how local traits influence the microhabitat use of tropical arboreal lizards. Here, we investigated the microhabitat selection of the poorly known lizard Tropidurus lagun...
Technical Report
Full-text available
IUCN assessment report of the North African Green Frog, Pelophylax saharicus
Article
Caimans of the species Caiman latirostris, which are widely distributed in South America, are opportunistic predators. They show ontogenetic variation in diet, with young individuals initially feeding on invertebrates and then gradually adding vertebrates in their diets as they grow up. However, due to inexperience, young individuals may end up eat...
Article
Caimans of the species Caiman latirostris, which are widely distributed in South America, are opportunistic predators. They show ontogenetic variation in diet, with young individuals initially feeding on invertebrates and then gradually adding vertebrates in their diets as they grow up. However, due to inexperience, young individuals may end up eat...
Preprint
Full-text available
Animal movement and behavior depend on the distribution of resources on the habitat. Therefore, individual animals are constantly making decisions on resource selection based on different attributes of the resource or its associated environmental variables. For fish-eating birds as kingfishers, selecting a suitable perch can report many benefits, a...
Article
Full-text available
Review of the book "Green Planets: Ecology and Science Fiction" (Edited by Gerry Canavan & Stanley Robinson) for the Special Issue on Environmental Studies of the MOSF Journal of Science Fiction (https://publish.lib.umd.edu/?journal=scifi). https://publish.lib.umd.edu/?journal=scifi&page=article&op=view&path%5B%5D=533
Preprint
Full-text available
Temperature affects most aspects of ectotherm life history, including physiology and behavior. Studying thermal sensitivity of jumping performance in frogs can help understanding the influence of temperature on different aspects of frog life. Still, studies on the effects of temperature on amphibians are commonly carried out on terrestrial and tree...
Presentation
Full-text available
Celebrating the World Wetlands Day, I gave a conference about the ecology of the largest wetland of the world -and the place where I conduct my postdoctoral research- the Pantanal of Brazil. I explained the climate, human communities and social issues, geomorphology and animal and plant ecology of the Pantanal.
Article
Full-text available
Studying how different variables influence the size and shape of animals’ home ranges helps our understanding of the ecology of individuals and populations. This study aims to assess the effects of sex and body mass on home range size and the sexual differences in the use of terrestrial habitats of a population of aquatic turtles Phrynops geoffroan...
Data
Márcia Marrie Pinheiro Müller, Zaida Ortega, Pâmela Castro Antunes, Larissa Lopes Seino, Matheus Justino Hammarstron, Ana Carolina França Balbino-Silva, Luiz Gustavo Rodrigues Oliveira-Santos Data type: ZIP file Explanation note: Code to rescale relocations, estimations of one-dimensional kernel, cut isopleths of probability and plots of home rang...
Article
Studying how different variables influence the size and shape of animals’ home ranges helps our understanding of the ecology of individuals and populations. This study aims to assess the effects of sex and body mass on home range size and the sexual differences in the use of terrestrial habitats of a population of aquatic turtles Phrynops geoffroan...
Conference Paper
Full-text available
Animals base resource use on many interacting variables. Here we propose an approach to facilitate assessing the role of many candidate variables -and their potential interactions- in resource selection within the same probabilistic process. We propose Mixed structural resource selection function (mixed-SRSF), that is, using mixed structural equati...
Article
The thermal ecology of ectotherms has been studied for almost two centuries, but additional attention is currently being paid to the issue in order to understand how organisms deal with the environment in a climate change context. However, a consensus is still far away, due to the large number of factors involved and their complex interactions. In...
Article
Due to the limited sample size and the heterogeneous nature of the data, we preferred to be conservative, only trusting the results from the first partitions of both meta-analyses (see the main text of this study). However, we provide here the full meta-analyses, in order to increase the transparency of our study and also because these results can...
Article
Full-text available
Most lizards maintain quite constant body temperatures by behavioural means. Seasonal variations of environmental factors, such as temperature, sunlight exposure and wind intensity, influence lizard thermoregulatory abilities. Understanding how seasonal environmental shifts influence lizards' thermoregulation helps us to know how they deal behaviou...
Article
Our aim was to disentangle the effects of different heat sources and the non-thermal properties of the substrate in the microhabitat choices of two lizard species living in savanna habitats of central-western Brazil: the teiid Ameivula aff. ocellifera (N = 43) and the tropidurid Tropidurus oreadicus (N = 23). To this end, a mixed structural resourc...
Article
Full-text available
The authors studied the influence of three environmental traits on the microhabitat selection of Ameiva ameiva (Linnaeus, 1758), in the Brazilian Pantanal, an environment with a marked effect of seasonality, i.e., alternating periods of flooding and falling dry. microhabitat selection was assessed in the dry season using a Resource selection Functi...
Article
The ability to early detect a potential predator is essential for survival. The potential of Iberolacerta cyreni lizards to discriminate between chemical cues of their two predatory snakes Coronella austriaca (a non-venomous active-hunter saurophagous specialist) and Vipera latastei (a venomous sit-and-wait generalist) was evaluated herein. A third...
Poster
We presented meta-partition, a meta-analysis methodology for splitting heterogeneity of effect sizes by potential predictors. We analysed the data on the thermal ecology of the Lacertidae through meta-partition, which allowed us to assess the relative importance of the different proposed factors, as well as their interactions, driving the thermal e...
Article
Selection of thermally suitable microhabitats plays an important role in the thermoregulation of ectotherms. We studied microhabitat preferences in two populations of the Balearic lizard, Podarcis lilfordi, that live on two coastal islets of Menorca (Balearic Islands, Spain: Aire and Colom). To assess the roles of different microclimatic traits dri...
Article
We studied the thermal ecology of the montane Iberian rock lizard, Iberolacerta monticola, in the western area of its distribution at the Serra da Estrela (Portugal). We calculated the precision of thermoregulation and the indices of thermal quality of the habitat, and accuracy and effectiveness of thermoregulation. To complete the study of the the...
Presentation
I presented the SYNTHESYS project ’Influence of environmental temperatures in body size and shape of ectotherms: assessing Bergmann’s and Allen’s rules in lizards’ at the Museum für Naturkunde of Berlin (Germany)
Article
Antipredatory defenses are maintained when benefit exceeds cost. A weak predation pressure may lead insular lizards to tameness. Podarcis lilfordi exhibits a high degree of insular tameness, which may explain its extinction from the main island of Menorca when humans introduced predators. There are three species of lizards in Menorca: the native P....
Data
Raw data of all the variables (see manuscript) for the five studied populations of lizards The number of the lizard identify each individual within each population.
Article
We studied the thermal ecology of an introduced population of the Italian wall lizard, Podarcis siculus, in Menorca (Balearic Islands, Spain). We measured field body temperatures of adult lizards, as well as air and substrate temperatures at their capture places, during spring and summer. We assessed the relations between body and air temperatures,...
Article
The Sahara frog is the most common amphibian found in North Africa. However, the knowledge of its natural history is rather fragmentary. In the present work we studied the trophic ecology of Pelophylax saharicus at some areas of Morocco through the analysis of 130 gastric contents. We did not find any significant sexual dimorphism in body size of a...
Article
We studied the thermal ecology of Testudo hermanni hermanni in Menorca during late spring. We measured body temperatures of adult individuals, together with air and substrate temperatures at points of capture. Sunlight exposure (full sun, filtered sun, or shade) and type of substrate were also recorded. Body temperatures were similar between sexes...
Conference Paper
Antipredatory defenses are maintained when benefit exceeds cost. A weak predation pressure may lead insular lizards to tameness. Podarcis lilfordi exhibits a high degree of insular tameness, which may explain its extinction from the main island of Menorca when humans introduced predators. There are three species of lizards in Menorca: the native P....
Poster
Full-text available
We studied the thermal ecology of the montane Iberian rock lizard, Iberolacerta monticola, in the western area of its distribution at the Serra da Estrela (Portugal). We calculated the precision of thermoregulation and the indices of thermal quality of the habitat, and accuracy and effectiveness of thermoregulation. To complete the study of the the...
Data
It comprises the detailed trees of the meta-partition, with comments about the intensity and direction of the effect of each moderator, and a table with all statistics obtained for each partition (QH, I2, and the integrated effect size), as well as the species that are included in each subset.
Data
Extended results of the meta-partition about the sensitivity of vertebrates to wetland habitat loss. It comprises the detailed trees of the meta-partition, with comments about the intensity and direction of the effect of each moderator, and a table with all statistics obtained for each partition (QH, I2, and the integrated effect size), as well as...
Article
Alpine lizards living in restricted areas might be particularly sensitive to climate change. We studied thermal biology of Iberolacerta cyreni in high mountains of central Spain. Our results suggest that I. cyreni is a cold-adapted thermal specialist and an effective thermoregulator. Among ectotherms, thermal specialists are more threatened by glob...
Data
Figure S1. Study area in the western part of the mountain chain Sierra de Gredos (Spain).
Data
Figure S2. Operative temperatures of different thermal microhabitats are provided for each hour of the day (GMT) for the sample of 2012. Dotted lines provide the preferred temperature range of Iberolacerta cyreni (31.18–32.5°C).
Data
Operative temperatures Dataset of the operative temperatures, measured with copper models, that provides the habitat of Natural Monument of “La Baña” (León, Spain) for Iberolacerta galani and Podarcis bocagei lizards during summer.
Data
Selected temperatures Dataset of the selected temperatures of Iberolacerta galani and Podarcis bocagei in summer.
Data
Indexes of thermoregulation Dataset of the output of the bootstrapped values of the three indexes of thermoregulation (thermal quality of the habitat, accuracy of thermoregulation, and effectiveness of thermoregulation) for Iberolacerta galani and Podarcis bocagei.
Data
Microhabitat selection Dataset with the frequency of use of each type of microhabitat by Iberolacerta galani and Podarcis bocagei, as well as the frequency of each type of microhabitat for the random points that represent it availability in the habitat.
Data
Field body temperatures Dataset with the field body temperatures of Iberolacerta galani and Podarcis bocagei during summer in the Natural Monument “Lago de la Baña” (León, Spain).
Article
We conducted an experiment on chemical discrimination of two saurophagous snakes (the smooth snake, Coronella austriaca and the Seoane's viper, Vipera seoanei) as well as the aquatic Natrix maura, by the mountain lizard Iberolacerta galani. Using terraria, 24 lizards were exposed to scents by the three snakes as well as an odourless control. We qua...
Conference Paper
All aspects of the biology of ectotherms are influenced by their body temperatures, which, in turn, strongly depend on the thermal characteristics of the habitat. High mountain habitats impose severe constraints, as the short length of the daily and annual activity periods, and the low environmental temperatures. We studied the thermal biology of f...
Poster
Full-text available
Thermal biology of lizards affects their overall physiological performance. Thus, it is crucial to study how abiotic constraints influence thermoregulation. We studied the influence of wind speed on thermoregulation in an endangered mountain lizard of the Pyrenees (Iberolacerta aurelioi). Therefore, we compared two populations of lizards: one livin...
Thesis
Full-text available
Todos los aspectos de la biología de los animales ectotermos están condicionados por las temperaturas corporales, que a su vez dependen mucho de las temperaturas del hábitat en que viven. Los hábitats de alta montaña imponen ciertas restricciones, siendo las más relevantes para la biología térmica de los animales, la corta duración del periodo de a...
Article
Lizards and gulls cohabit in several Mediterranean islands. The yellow-legged gull, Larus michahellis, was found to prey several vertebrate species. However, precise information about the interaction between gulls and other vertebrates, particularly with lizards is still scarce. The Balearic lizard, Podarcis lilfordi, shares several coastal islets...
Article
During spring and summer, we studied the thermal ecology of two populations of the Balearic lizard, Podarcis lilfordi, from two coastal islets of Menorca (Balearic Islands, Spain): Aire and Colom. We calculated the accuracy of thermoregulation, that is, the extent to which body temperatures are close to species' thermal optima, the thermal quality...
Thesis
Se ha realizado un metaanálisis de los trabajos publicados sobre biología térmica de los saurios de la familia Lacertidae, con objeto de detectar resultados generales que no pueden obtenerse en las publicaciones individuales. Primero, queda patente la gran heterogeneidad de los estudios existentes, que aconsejamos que se intente reducir en futuros...