José Francisco Calvo

José Francisco Calvo
University of Murcia | UM · Department of Ecology and Hydrology

PhD

About

153
Publications
41,450
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2,804
Citations
Citations since 2017
28 Research Items
1171 Citations
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
Introduction
I am professor of Ecology. My research activity focuses on diverse aspects of ecology and environmental management, though many of my recent works deal with the study of raptor and bat populations (habitat selection, population dynamics, conservation).

Publications

Publications (153)
Article
Full-text available
Farmland bird populations are declining worldwide as a consequence of agricultural intensifi-cation, and the loss of singular landscape elements has been suggested as one of the main drivers. This scenario of agroecosystem simplification is even more exacerbated in arid and semiarid regions, where traditional small waterbodies (SWB) are rapidly van...
Article
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In bi-parentally built nests, there is evidence to suggest that nests are extended phenotypic signals that accurately indicate the quality of the building parent/s. Raptors often use a variety of materials to build their nests (natural, such as branches, but also non-natural objects), presumably due to their insulating properties, their suitability...
Preprint
Full-text available
Raptors often use a variety of materials to build their nests (natural, such as branches, but also non-natural objects), presumably due to their insulating properties, their suitability to advertise occupancy of the nest, and to decrease pathogen and parasite loads. The amount of branches used in a nest is an indicator of parental quality and is of...
Article
Rivers are generally considered critical habitats for biodiversity; however, this often ignores the fact that many rivers may run dry and support terrestrial as well as aquatic fauna. Here, we investigated the ecological value of intermittent rivers for terrestrial vertebrates by installing camera traps along rivers subject to varying dry periods i...
Article
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A robust knowledge of biodiversity distribution is essential for designing and developing effective conservation actions. The choice of a suitable sampling method is key to obtaining sufficiently accurate information of species distribution and consequently to improve biodiversity conservation. This study applies multi-method occupancy models to 36...
Article
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We provide census data on a non-invasive long-term (18 years, 1998-2015) monitoring programme of a booted eagle (Hieraaetus pennatus) population in a Mediterranean forested area located in the Natura 2000 Special Protection Area “Sierras de Burete, Lavia y Cambrón”, south-eastern Spain. The dataset includes information about nest and territorial oc...
Article
Full-text available
We provide field monitoring data of a territorial raptor (the booted eagle, Hieraaetus pennatus), that was intensively monitored over a period of 18 years (1998–2015) in a Mediterranean forested area of south-eastern Spain designated as a Special Protection Area (Natura 2000 Network) for this species. The data set compiles all the relevant informat...
Article
Some metals and metalloids (e.g. Pb, Hg, Cd and As) are well-known for their bioaccumulation capacity and their toxic effects on birds, but concerns on other minor elements and rare earth elements (ME and REE) are growing due to their intensive use in modern technology and potential toxicity. Vitamins and carotenoids play essential roles in nestlin...
Article
Capsule: Differences in parental investment between sexes and stage of the breeding period were found in Bonelli’s Eagles Aquila fasciata. Aims: To describe the sexual differences in parental behaviour of Bonelli’s Eagles and to assess the sex-specific pattern of variation in parental investment in relation to the breeding period. Methods: Betwee...
Article
1. Semi-arid and arid landscapes (dry-lands) cover 41% of the Earth’s land surface over five continents. These areas are home to 55% of mammal species. Bats have the second highest species richness among mammals, and, although many species are adapted to arid conditions, they are particularly sensitive in these habitats and require conservation pri...
Preprint
Full-text available
Robust knowledge of biodiversity distribution is essential for designing and developing effective conservation actions. However, monitoring programmes have historically assumed all species are detected equally with no spatial or temporal differences in their detection rates. However, recently, interest in accounting for imperfect detection has grea...
Article
Colour polymorphism occurs in several animal taxa and in around 3.5% of bird species. This phenomenon is disproportionately high in raptors, affecting approximately 30% of species. However, there are only four research studies in wild Accipitridae species and two in Falconidae species on colour plumage polymorphism. Here, we used the data collected...
Article
Full-text available
New monitoring programs are often designed with some form of temporal replication to deal with imperfect detection by means of occupancy models. However, classical bird census data from earlier times often lack temporal replication, precluding detection‐corrected inferences about occupancy. Historical data have a key role in many ecological studies...
Article
Full-text available
Natural nest sites are important breeding resource in terms of population dynamics, especially in forest systems where nest trees limit populations or timber harvesting destroys nests. Nest structures usually have a long life and can be reused by breeding pairs across multiple breeding seasons, so studying their dynamics is of relevance for biodive...
Data
Number of occupied nests in the Regional Park of Sierra Espuña (SE Spain) from 1991 to 2017, considering the three forest raptor species. (DOC)
Article
Coastal lagoons host important values and provide irreplaceable services to society. Communication areas with the sea (gullets, 'golas' in Spanish) are dynamic environments with a key role in their overall functioning, often representing also strongholds of biodiversity, which increases their conservation value and social demand for nature-based ac...
Poster
Full-text available
Los pequeños cuerpos de agua (abrevaderos, albercas y charcas) desempeñan un importante papel para la conservación de la biodiversidad en ambientes semiáridos, especialmente en el sureste ibérico. Numerosos estudios han analizado su contribución al mantenimiento de grupos animales con fases eminentemente acuáticas (p.e. anfibios e invertebrados), p...
Article
Land-use management, human impacts, and wildlife population processes taking place outside protected areas may affect the conservation of species within protected areas. While many studies have evaluated the effectiveness of protected areas for conserving biodiversity, the contribution of non-protected areas in this respect has seldom been assessed...
Article
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Modelling territorial occupancy and reproductive success is a key issue for better understanding the population dynamics of territorial species. This study aimed to investigate these ecological processes in a Eurasian Eagle-owl (Bubo bubo) population in south-eastern Spain during a seven-year period. A multi-season, multi-state modelling approach w...
Data
Input data for PRESENCE. Occupancy histories of 72 Eurasian Eagle-owl territories (four surveys over seven years) in south-eastern Spain, and associated environmental covariates. (TXT)
Data
Summary of model selection process on dynamic occupancy probabilities (ψt[m]) of a Eurasian Eagle-owl population in south-eastern Spain. (PDF)
Data
Summary of model selection process on dynamic reproduction probabilities (Rt[m]) of a Eurasian Eagle-owl population in south-eastern Spain. (PDF)
Article
Full-text available
Resident physicians are the first-line health service providers, subjected to prolonged working hours, sleep deprivation and high job demands. Work stress causes reduction in productivity, suboptimal patient care and medical errors. To determine the level of stress among residents and associated factors and stressors. A cross-sectional study at Tan...
Article
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The avifauna component is one of most important and of greatest conservation concern as regards the biodiversity of the province of Murcia. The present catalogue consists of a total of 339 species belonging to 69 families and 24 orders, of which 78 are principally considered winter visitors, 51 passage migrants, 41 summer visitors, 85 resident, 82...
Article
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Foraging movements during the breeding season are a poorly studied aspect of booted eagle behaviour. We have investigated the relationship between weather and other abiotic factors and foraging behaviour, and also resource use by a female booted eagle, tagged by satellite-GPS transmitter in central Catalonia, during summer 201 2 and spring 201 3. G...
Article
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The survival rate is a key parameter for population management and the monitoring of populations. Thus, an analysis of survival rate variations and the factors influencing the same is essential for understanding population dynamics. Here, we study the factors determining the survival and the causes of mortality of the Eurasian eagle owl (Bubo bubo)...
Article
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Occurrence models that account for imperfect detection of species are increasingly used for estimating geographical range, for determining species-landscape relations and to prioritize conservation actions worldwide. In 2010, we conducted a large-scale survey in Río Muni, the mainland territory of Equatorial Guinea, which aimed to estimate the prob...
Article
Full-text available
Mechanisms regulating colour polymorphism remain largely unknown and detailed investigation is required to explore the biological consequences on population dynamics. This paper presents the first study of the possible connection between colour polymorphism and productivity in a Booted Eagle (Aquila pennata) population breeding in southeastern Spai...
Conference Paper
Full-text available
In September 2013 the Regional Assembly of the Autonomous Community of Murcia adopted unanimously the creation of a pedestrian walkway to promote ecotourism, environmental education and research in the area of the ‘Encañizadas del Mar Menor’, a space between the aforementioned lagoon and the Mediterranean Sea. The regional representatives condition...
Article
Full-text available
Analysis of the 949 and 434 cases of mortality of Booted Eagle Aquila pennata and Short-toed Snake Eagle Circaetus gallicus, respectively, recorded by wildlife rehabilitation centres in Spain over a 16-year period (1990–2006) shows that power lines (19.5 and 35.2 %, respectively) and killing (32.5 and 22.9 %, respectively) were the main known cause...
Article
Full-text available
The meridional serotine Eptesicus isabellinus (Temminck, 1840) has recently been identified as a cryptic species that occurs in the south of the Iberian Peninsula. Little is known about its ecology. We used morphological analysis of droppings from an urban semiarid Mediterranean landscape to determine seasonal differences in diet. We identified 15...
Poster
Full-text available
El murciélago hortelano meridional Eptesicus isabellinus ha sido recientemente incluido en la fauna quiropterológica de la Península Ibérica, apareciendo distribuido ampliamente por el sur peninsular y separado de su especie gemela el murciélago hortelano E. serotinus (véase Lisón 2015). Se trata de una especie aparentemente abundante y con un marc...
Article
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One of the main aims of protected areas is to be effective in the conservation of target species, i.e. those of the highest conservation concern. The Natura 2000 network (N2000) of protected areas is the main pillar of European action to halt biodiversity loss. Within N2000, Special Areas of Conservation (SACs) are designated to protect habitats an...
Conference Paper
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In Southeastern Spain, the control of Exotic Invasive Species (EIS) invading riparian habitats is based mostly on short-lived, intensive eradication campaigns. Project LIFE 13 BIO/ES/001407 RIPISILVANATURA (2014-2019), co-funded by the European Commission, adopts a new approach which combines low-intensity restoration and ecological engineering tec...
Conference Paper
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Se describen las acciones preparatorias y de seguimiento incluidas en el proyecto LIFE 13 BIO/ES/001407 RIPISILVANATURA (2014-2019), liderado por la Confederación Hidrográfica del Segura, cuyo objetivo principal es recuperar el bosque de ribera del río Segura mediante la protección y restauración de los hábitats riparios y el control de las especie...
Article
Full-text available
The breeding performance of birds of prey is often related to changes in rainfall, which affects the productivity of the environment and the availability of food and may thereby affect chick survival. We investigated the influence of rainfall on the productivity of two populations of Booted Eagle Aquila pennata in two Spanish Mediterranean regions—...
Article
Full-text available
This paper presents the first study of foraging behaviour and hunting success in Bonelli's Eagle. Attack success was modelled as a function of biological and environmental variables using observations made during a long-term monitoring. The overall attack success was 28.2%, based on 110 attack observations recorded between 1985 and 2008 in south-ea...
Article
Little information is available on the patterns of genetic connectivity in owls. We studied the genetic structure of the eagle owl Bubo bubo (Linnaeus, 1758) in southeastern Spain at two different spatial scales. Seven microsatellites previously described for this species were used, although only six loci amplified correctly. The observed low genet...
Article
Full-text available
In dry Mediterranean forests, ponds constitute essential water resources for animals, especially during summer months. In south-eastern Spain, land use changes and the human abandonment of mountainous zones have led to the loss of many ponds. These ponds are scarce landscape elements and, despite their usually small size (<1000 m2), they support a...
Article
This paper presents the first study of foraging behaviour and hunting success in Bonelli's Eagle. Attack success was modelled as a function of biological and environmental vari-ables using observations made during a long-term monitoring. The overall attack success was 28.2%, based on 110 attack observations recorded between 1985 and 2008 in south-e...
Chapter
It is technical report where it is analysed a zone located in Murcia (SE Spain) and it is important for the National Inventory of Mammals Important Zones of Spain.
Article
Full-text available
Habitat preference of the meridional serotine bat Eptesicus isabellinus (Temminck, 1840) in semiarid Mediterranean landscapes Several molecular studies have recently reported the presence of a second species of the genus Eptesicus in the Iberian peninsula, the meridional serotine bat, E. isabellinus. This species is present in the south of Iberia a...
Article
Full-text available
Structural elements for breeding such as nests are key resources for the conservation of bird populations. This is especially true when structural elements require a specific and restricted habitat, or if the construction of nests is costly in time and energy. The availability of nesting-platforms is influenced by nest creation and persistence. In...
Article
Although sexual size dimorphism (SSD) is common among mammals, there is no clear explanation for its maintenance in nature. Bats are one of the few groups of mammals where reverse SSD appears. In this group, the size of individuals may have very important ecological consequences related with flight. In this study, we examine sexual dimorphism in th...
Article
Full-text available
Mercury (Hg) is a global pollutant that bioaccumulates and biomagnifies in food chains, and is associated with adverse effects in both humans and wildlife. The Hg levels detected in blood obtained from Eagle Owl (Bubo bubo) chicks in Southeast Spain (Murcia) can be considered low (mean Hg concentration in blood from 2006 to 2012 was 36.83±145.58μg/...
Article
Full-text available
The presence of old nest structures can be an influential resource in reuse patterns and reproductive output for some birds. We used 15-year territorial occupancy data referring to the booted eagle Aquila pennata (a trans-Saharan migrant) and the common buzzard Buteo buteo (a sedentary species in southeastern Spain) to analyse old nest effects in t...
Article
Several molecular studies have recently reported the presence of a second species of the genus Eptesicus in the Iberian peninsula, the meridional serotine bat, E. isabellinus. This species is present in the south of Iberia and it seems to have an allopatric distribution with its twin species, E. serotinus. Ecological studies are now needed to under...
Article
The Natura 2000 Network represents the greatest step forward yet in conservation in Europe, although its effectiveness is sometimes questioned, especially in Mediterranean regions. Bats are protected by the Habitat Directive and the presence of certain species is a prerequisite before Special Areas Conservation (SAC sites) can be included as such i...
Article
Full-text available
Se cita por primera vez la presencia del murciélago de Nathusius, Pipistrellus nathusii, en la Región de Murcia (sureste de España). Se observaron y capturaron cierto número de individuos en el Parque Regional de Sierra Espuña, un espacio natural de carácter forestal, cuyas formaciones boscosas están compuestas principalmente por pino carrasco (Pin...
Article
Full-text available
In raptors, brood size seems to be closely related to the size of prey brought to the nest, the delivery rate and the degree of parental effort. In the case of Peregrine Falcons (Falco peregrinus), any increase in the size of prey is considered to be linked to the increased role of the female in hunting. We investigated the possible effects of diff...
Conference Paper
Full-text available
Determinados parámetros bioquímicos sanguíneos pueden verse alterados por la exposición a contaminantes ambientales persistentes y por tanto, ser utilizados como indicadores secundarios del estrés ocasionado. En base a esto, el objetivo del presente estudio fue estudiar las correlaciones entre los niveles de insecticidas organoclorados y albúmina,...
Conference Paper
Full-text available
Se han analizado las concentraciones de plomo (Pb), cadmio (Cd), mercurio (Hg), cobre (Cu) y zinc (Zn) en sangre de pollos (n=353) y adultos (n=8) de Búho real (Bubo bubo) muestreados en la Región de Murcia desde 2004. El área de estudio se dividió en dos subáreas, norte y sur, ésta última caracterizada por una importante área industrial y una anti...
Conference Paper
Full-text available
El mercurio es un metal pesado altamente tóxico que se bioacumula en mamíferos insectívoros; sin embargo, los estudios sobre el tema son muy escasos, y ninguno de la Península Ibérica. Los objetivos del presente trabajo son: 1) Obtener información sobre la distribución tisular del mercurio en el murciélago de cueva (Miniopterus schreibersii), media...
Article
Full-text available
Different species show different responses to natural disturbances, depending on their capacity to exploit the altered environment and occupy new niches. In the case of semi-arid Mediterranean areas, there is no information available on the response of bird communities to disturbance caused by extreme weather events. Here, we evaluate the short-ter...
Conference Paper
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El presente estudio se basa en el establecimiento de unas de bases ecológicas para la conservación de Tetraclinis articulata mediante la elaboración el Plan de Conservación en la Región de Murcia (Esteve y Miñano, 2010). Este Plan se presentó en el año 2010, con unas pautas a seguir para conseguir una adecuada conservación de esta especie, además d...
Article
Wetlands and aquatic habitats in Mediterranean environments are very scarce in general, representing a limiting resource for all species. For pipistrelle bats, such environments are essential and so those species living in sympatry have to develop mechanisms of niche partitioning to avoid direct competition. We used ecological niche models and habi...
Article
Full-text available
Territory fidelity defines a process in which individuals reoccupy a territory during different reproductive periods. In this study, we used generalized linear mixed models to analyse the territory fidelity of the Booted Eagle Hieraaetus pennatus in relation to different variables of the individual (previous breeding success, sex, mate switching an...
Chapter
Full-text available
In this study we have used blood of Booted eagle (Aquila pennata) nestlings (n=62) to evaluate the exposure to p,p’-DDT, p,p’-DDD and p,p’-DDE in an agricultural area from Southeastern Spain in 1999-2003 breeding seasons. Our results showed than the trans-Saharan migratory factor cannot account for the results obtained for DDT and its analogues in...
Article
Full-text available
CAZADORES SOLITARIOS COMPARTIENDO UN RECURSO TRÓFICO ABUNDANTE: CAZA SIMULTÁNEA DE RAPACES EN UN DORMIDERO DE INVERNADA DE FRINGILLA MONTIFRINGILLA Durante el invierno de 2010–11 se formó un dormidero invernal de aproximadamente 1 000 000 de individuos de Fringilla montifringilla en una plantación de cipreses (Chamaecyparis lawsoniana), abetos (Pic...
Article
Full-text available
South-eastern Spain is a key area for assessing the effects of climate change on biodiversity since it presents an ecotone between the Mediterranean biome and the subtropical shrublands of arid lands. The forests of Tetraclinis articulata constitutes an especially relevant case. A species distribution model has been developed, regionalised climate...
Article
The semiarid Mediterranean areas of south-eastern Spain have undergone great economic growth in recent years following the disproportionate expansion of intensive agriculture and housing developments. Such growth can only be supported by the development of large-scale hydraulic engineering works to compensate for the restrictions imposed by the sca...