Podarcis virescens

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Podarcis virescens
Lizard (32967560821).jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Family: Lacertidae
Genus: Podarcis
Species:
P. virescens
Binomial name
Podarcis virescens
Geniez, Sa-Sousa, Guillaume, Cluchier, & Crochet, 2014

Podarcis virescens, also known by its common name as Geniez's wall lizard, is a lizard species of the Lacertidae family. Podarcis virescens is commonly found in the Iberian Peninsula, including Spain and Portugal. The lizard's name is derived from Latin due to its color turning from a usual brown color to green during the spring. Podarcis virescens are a moderate sized lizard and robust in build. Colors vary during seasons and range between individuals from white, brown, green, and black. Podarcis virescens have been found in villages and other human-populated areas in Spain and Portugal at elevations of around 840 meters. [1] [2]

Contents

Description

Podarcis virescens is a lizard species of a moderate size, although it can be significantly larger than other lizards in the Podarcis genus such as Podarcis carbonelli . Podarcis virescens vary significantly in color with individuals ranging from white to brown or black. Individuals, particularly males, may change color to green during the spring which then disappears in the summer. The underside of the lizard is more yellow in color than other parts of its body. Podarcis virescens are robust in shape and not flattened compared to other lizard species. Males and females are of around the same size between 40 mm and 63 mm. [1] [2]

Podarcis virescens is considered a robust lizard due to its build. Podarcis lizards vary greatly in color and build so Podarcis virescens does not completely share appearance traits with other species of the same genus. This was likely caused by increased diversification in the history of Podarcis lizards, especially during the time period preceding and around the Zanclean flood. [3]

Body temperature

Podarcis virescens have been used in studies on lizard body temperatures and to determine accurate methods of reading lizard body temperatures using non-invasive techniques. Overall, Podarcis virescens were found to have a lower body temperature than other two lizard species which were Lacerta schreiberi and Timon lepidus . This may be due to the smaller size of the Podarcis virescens lizard compared to the other two species. Since Podarcis virescens are smaller than the other lizards studied, they also vary more in temperature when switching between heating and cooling conditions. Due to the availability of the Podarcis virescens lizard, it is possible to use them for similar studies. [1] [4]

Podarcis virescens Podarcis virescens.jpg
Podarcis virescens

History and Taxonomy

Around 20 Mya, Podarcis lizards, also known as wall lizards, began to arise in the Mediterranean region. From 20 Mya to 11 Mya, Podarcis lizards likely expanded to the Iberian Peninsula and other parts of Europe. Approximately 5.3 Mya, the Zanclean Flood ended the Messinan salinity crisis which led to increased diversification in lizard species, including Podarcis lizards. These genetic changes formed the Podarcis lizard species found today, one of which is Podarcis virescens. Due to the immense diversification during this time, an accurate family tree for Podarcis lizards has been difficult to construct. The exact taxonomy of Podarcis virescens is still being investigated as of 2020. [3]

Podarcis virescens was accepted as a species by the Taxonomic Committee of the Societas Europaea Herpetologica in 2020 after a series of studies on the Podarcis genus of lizards. Previously, Podarcis hispanicus included similar Podarcis lizards including Podarcis virescens and Podarcis guadarramae. After genetic and morphological studies, it was found that there was enough molecular and morphological difference to establish Podarcis virescens as its own species. These species are fairly similar as they all inhabit slightly different regions of the Iberian Peninsula and share other traits such as their appearance and behavior. Podarcis virescens is partially distinguished by more heavily inhabiting central and southwestern parts of the Iberian Peninsula compared to other Podarcis lizards. [5]

Introgression and speciation

Podarcis virescens are closely related to other lizard species, especially other lizards in the Podarcis genus. Opportunities for interaction between Podarcis virescens and other Podarcis lizards is possible due to significant overlap in habitat and inhabited regions. Additionally, Podarcis virescens have been seen interacting with other Podarcis lizards such as Podarcis carbonelli lizards. Podarcis virescens have definitively been found to be a separate species than other Podarcis lizards, including Podarcis carbonelli, with a divergence time of 3.9 Mya. However, there is some introgression between the species as well. This is seen through the genomes of the two species which are significantly related. [6]

Podarcis virescens is a lizard species in the Podarcis genus which includes many lizard species found in the Mediterranean region. Podarcis lizards are commonly known as wall lizards. Two of the closest relatives of Podarcis virescens are Podarcis hispanicus and Podarcis carbonelli, both of which are also native to the Iberian Peninsula. Podarcis carbonelli are more commonly found near rivers and are somewhat smaller in size than Podarcis virescens. These Podarcis species share common diets and other traits. There has been a cited case of Podarcis virescens preying on Podarcis carbonelli, although it is unknown how common this practice is. [2]

Podarcis visrecen is closely related with Podarcis hispanicus as they co-habituate the Iberian Peninsula. They share similar coloration patterns.

Habitat and distribution

Podarcis virescens is commonly found in the Iberian Peninsula, including Spain and Portugal, most commonly in the Central and Southern regions of the Iberian Peninsula. However, the lizard is not commonly found in the most southern and eastern portions of Spain. Podarcis virescens can be found near cities and villages including Santa Maria da Feira, in Portugal, and Villanueva de los Escuderos, in Spain. The lizard can sometimes be found near rivers or mountains, although the lizard's habitat can vary greatly and includes human-inhabited areas around cities. Examples of Podarcis virescens sightings include cultivated plains and human roads surrounding Spanish and Portuguese cities. [1] [2]

Podarcis virescens Lizard (34090651981).jpg
Podarcis virescens

Urban habitats

As the native habitat of Podarcis virescens in the Iberian Peninsula has become more urbanized by humans, they have adapted to the urban environment and inhabit areas where humans are present such as human gardens. In addition to living on natural ground and rocky areas, Podarcis virescens lizards have adapted to live on artificial structures such as roads, bridges, and buildings. However, when introduced into a new area such as a garden, they are not very likely to spread out far from the location at which they were introduced. This means that the spread of the Podarcis virescens lizard to adapt to new locations may be slow. [7]

Ecology and behavior

Diet

Like most similar lizards, Podarcis virescens mainly rely on small arthropods for food. This includes Coleoptera, Homoptera, and Araneae arthropods. In some cases, cannibalism or preying on similar lizards has been found and documented in similar lizards. Several cases of cannibalism with other Podarcis lizards, like Podarcis atrata, eating eggs and juveniles has been observed. One case of Podarcis virescens preying on Podarcis carbonelli has been observed in Portugal. These cases are predicted to involve high density areas of lizards with low resources resulting in cannibalism. With the Podarcis virescens case, it is possible that the Podarcis virescens was significantly larger than the Podarcis carbonelli lizard as Podarcis virescens lizards are generally larger in size. [2]

Interaction with other lizards

Predation

Podarcis virescens is related to similar Podarcis lizards which are also found in the Iberian Peninsula. Due to overlapping habitats, interactions can occur between the species. One case is with Podarcis virescens lizards and Podarcis carbonelli lizards. Both are found in the Iberian Peninsula, with significant overlap particularly in parts of Portugal. Here, with other Podarcis lizard species, larger lizards have been found to prey on similar smaller lizard species. This is due to overlap in the desired resources of the species and competition when resources are scarce or population density is high. In the case of Podarcis virescens and Podarcis carbonelli lizards, one Podarcis virescens lizard was observed to prey on a smaller Podarcis carbonelli lizard. [2]

Displacement by invasive species

Podarcis virescens are native to the Iberian Peninsula. However, other Podarcis lizards have been found to be invasive species in the native areas of Podarcis virescens. This includes the Podarcis siculus lizard from Italy which was introduced to Portugal, where Podarcis virescens are native, around the year 2000. This has resulted in some displacement of Podarcis virescens lizards from their native habitats. However, the exact method of competition between the two Podarcis lizard species was unknown in nature. It is possible that direct interference competition occurs between the Podarcis virescens and Podarcis siculus lizards where aggression and other behaviors play a role. It is also possible that indirect competition for similar resources occurs. [8]

Competition with Podarcis siculus

Since displacement of Podarcis virescens lizards in their natural region of the Iberian Peninsula is occurring due to invasion by other Podarcis lizards like Podarcis siculus, studies have been conducted to investigate the behavioral interactions between the two lizards species and how they compete. It was found in controlled experiments that Podarcis siculus lizards outcompete Podarcis virescens counterparts through indirect competition methods rather than direct interference methods. Podarcis siculus lizards were found to arrive at food stations earlier, consume more food, and gain more weight than Podarcis virescens lizards which may explain why Podarcis virescens are being displaced in nature. Evidence was not found to support the direct method of competition, such as aggression between the two lizard species. [8]

Comparison to Podarcis siculus

Podarcis virescens lizards are often seen basking at a 64% rate which is slightly higher than that of the related Podarcis siculus lizard species which basks at a rate of 57%. Podarcis virescens lizards can also be seen being active at a 20% rate while the Podarcis siculus lizard species is active at an 18% rate. Both Podarcis virescens and Podarcis siculus lizards may seek shelter when disturbed with only around 22% of each lizard species not seeking any shelter. Overall, the two lizard species behave similarly possibly due to their relatedness and shared habitat. This also may increase competition between the two species. [7] The native P. virescens has seemed to better adapt to the urban habitats within the city, however, compared to the invasive P. siculus which tends to stay in a smaller, more natural environment. [9]

Exploration

The behavior of Podarcis virescens lizards is of interest to researchers due to the possible differences between Podarcis virescens behavior and Podarcis siculus, an invading species in the Iberian Peninsula, behavior. In a controlled study, it was found that Podarcis virescens lizards were less willing to explore a new environment than Podarcis siculus lizards. Podarcis virescens lizards were also less willing to approach new objects and explore after being scared than Podarcis siculus lizards. These results indicate that Podarcis virescens may be outcompeted by invading Podarcis siculus lizards because of behavioral traits that make Podarcis virescens less suitable for competing with the invading species. [10]

Parasites

Podarcis virescens lizards face parasites in their native habitats in the Iberian Peninsula. A study on their parasites genetically identified most Podarcis virescens parasites as haemogregarines, in the genus Karyolysus, which are common blood parasites in many reptiles. These parasites also affect other Podarcis lizard species in the Iberian Peninsula like Podarcis hispanicus and Podarcis bocagei. This is likely due to overlapping traits such as habitat and diet which may expose Podarcis lizard species to the same parasites. Podarcis virescens lizards also have a high prevalence of infection by parasites at 69.0% which indicates that the parasites have significant impacts on the lizard species. [11]

Parasite comparison with Podarcis siculus

As Podarcis siculus lizards have been invading the native Iberian Peninsula habitat of Podarcis virescens lizards, one possible difference between the two lizard species has been their interactions with parasites. A study found that while Podarcis virescens lizards have high rates of infection, 69.0%, the invading Podarcis siculus lizards are only infected at a 3.7% rate. Furthermore, infected Podarcis virescens lizards are affected more significantly than infected Podarcis siculus lizards. This difference in susceptibility to parasitic infection, where Podarcis virescens lizards are at a disadvantage, may be one factor contributing to the successful invasion of the Iberian Peninsula by Podarcis siculus lizards. [11]

Conservation status

Podarcis virescens currently does not have a conservation status according to the International Union for the Conservation of Nature (IUCN). While the IUCN lists other lizard species including lizards in the Podarcis genus as being endangered or monitored for conservation, there does not appear to be concern for Podarcis virescens levels. They are commonly found throughout the Iberian peninsula in mountainous and other areas. They have adapted to human changes in their habitat and can be seen on human structures like roads and buildings. The exact impact of humans on Podarcis virescens is unknown as no studies have been conducted to investigate levels of Podarcis virescens in their native region. [1] [12]

Interactions with humans

As Podarcis virescens lizards are native to the Iberian Peninsula which is changing due to the presence of humans, lizards have adapted to adjust to the significant human presence in their natural regions. Podarcis virescens lizards are often seen on human structures such as buildings and roads. Podarcis virescens are even seen in human establishments like in the walls of man-made structures and castles. When introduced to a new environment such as a city, Podarcis virescens lizards are comfortable adjusting to such a location and exploring in their nearby surroundings. However, they do not venture far from their initial location of introduction and have not been observed to interact with humans significantly. [7] [6]

This response to humans is similar to that of other Podarcis lizards including Podarcis muralis which have also become accustomed to humans being in their environments and natural habitats. Humans no longer represent a significant threat as predators toward these lizards so they have become more comfortable in the presence of humans. Urbanization has changed their natural habitats but these lizards are adjusting to their new environments. [13]

Related Research Articles

<i>Podarcis</i> Genus of lizards

Podarcis is a genus of lizards in the family Lacertidae. Its members look very similar to lizards of the genus Lacerta, to which they were considered to belong until the 1970s. While similar externally and ecologically, Podarcis form a distinct group differing from Lacerta by the construction of the skull and the hemipenis, and by the processes of the caudal vertebrae. They are commonly known as wall lizards. They are native to Europe and northern Africa, and most species are restricted to the Mediterranean region. Wall lizards diversified and hybridized during the Messinian salinity crisis. The Italian wall lizard and the common wall lizard have been introduced to North America, where they have become intermediate hosts for some Acuariidae larvae.

<i>Podarcis muralis</i> Species of lizard

Podarcis muralis is a species of lizard with a large distribution in Europe and well-established introduced populations in North America, where it is also called the European wall lizard. It can grow to about 20 cm (7.9 in) in total length. The animal has shown variation in the places it has been introduced to. Fossils have been found in a cave in Greece dating to the early part of the Holocene.

<i>Podarcis hispanicus</i> Species of lizard

Podarcis hispanicus, also known as Iberian wall lizard, is a small wall lizard species of the genus Podarcis. It is found in the Iberian Peninsula, in northwestern Africa and in coastal districts in Languedoc-Roussillon in France. In Spanish, this lizard is commonly called lagartija Ibérica.

<i>Iberolacerta cyreni</i> Species of lizard

Iberolacerta cyreni, commonly known as the Cyren's rock lizard, is a species of lizard in the family Lacertidae. The species is endemic to central Spain and is currently listed as endangered by the IUCN due to global warming. I. cyreni has evolved to exhibit key behavioral characteristics, namely individual recognition, in which a lizard is able to identify another organism of the same species, as well as thermoregulation.

<span class="mw-page-title-main">Iberian rock lizard</span> Species of lizard

The Iberian rock lizard is a species of lizard in the family Lacertidae. The species is endemic to Portugal and Spain. Its natural habitats are mountain forests, shrubland, rivers and rocky areas. It is threatened by habitat loss.

<span class="mw-page-title-main">Bocage's wall lizard</span> Species of lizard

Bocage's wall lizard is a species of lizard in the family Lacertidae. The species is endemic to the Iberian Peninsula. Its natural habitats are temperate forests, temperate shrubland, Mediterranean-type shrubby vegetation, sandy shores, rural gardens, and urban areas. The IUCN does not consider it to be threatened.

<i>Podarcis carbonelli</i> Species of lizard

Podarcis carbonelli, commonly known as Carbonell's wall lizard, is a species of lizard in the family Lacertidae. The species is native to Portugal and Spain.

<span class="mw-page-title-main">Ibiza wall lizard</span> Species of lizard

The Ibiza wall lizard is a species of lizard in the family Lacertidae. It is most closely associated with the island of Eivissa, or Ibiza, in the Balearic Islands, but has become naturalized in parts of Spain.

<span class="mw-page-title-main">Italian wall lizard</span> Species of lizard

The Italian wall lizard or ruin lizard is a species of lizard in the family Lacertidae. P. siculus is native to south and southeastern Europe, but has also been introduced elsewhere in the continent, as well as North America, where it is a possible invasive species. P. siculus is a habitat generalist and can thrive in natural and human-modified environments. Similarly, P. siculus has a generalized diet as well, allowing it to have its large range.

<i>Psammodromus hispanicus</i> Species of lizard

Psammodromus hispanicus, the Spanish psammodromus, is a species of lizard in the family Lacertidae. It is found in France, Portugal, and Spain.

<span class="mw-page-title-main">Iberian worm lizard</span> Species of amphisbaenian

The Iberian worm lizard, Mediterranean worm lizard, or European worm lizard is a species of reptile in the family Blanidae of the clade Amphisbaenia. The Iberian worm lizard is locally known as cobra-cega (Portuguese), culebrilla ciega (Spanish), and colobreta cega (Catalan), all meaning "blind snake". Recent studies into the mitochondrial and nuclear genomic data of 47 isolated B. cinereus populations show rather large sequence divergence between two apparent clades, leading some researchers to call for a division of the Iberian worm lizard into two species. While little is known of B. cinereus in comparison with some other reptile species, new insight is growing about this primitive, ancestral reptile.

<span class="mw-page-title-main">Dubious dtella</span> Species of lizard

The dubious dtella, native Australian house gecko, or dubious four-clawed gecko is a species of gecko in the genus Gehyra, native to Northeastern Australia. The lizard is found in a variety of habitats, including acacia and eucalyptus woodlands, and in human-developed habitats, such as house walls in urban areas. Its urban presence makes it known as a common house gecko in Queensland. These geckos are often confused with the Asian common house gecko, which was introduced to Australia from Indonesia, but G. dubia has distinct rounded feet and quieter calls.

<i>Ommatoiulus moreleti</i> Species of millipede

Ommatoiulus moreleti, commonly known as the Portuguese millipede, is a herbivorous millipede native to the western Iberian Peninsula where it shares its range with other Ommatoiulus species. From here, it has spread by international commerce to a number of new localities. This species was accidentally introduced into Australia without its natural enemies and has since become an invasive pest. A number of methods have been developed to manage this millipede.

Lizards are among the most diverse groups of reptiles, with more than 5,600 species. With such diversity in physical and behavioral traits, lizards have evolved many ways to communicate. Communication may be physical, chemical, tactile, or vocal, and varies according to habitat, sexual selection practices, and predator avoidance methods. Each type of communication uses different sensory systems, including visual, olfactory, and auditory.

<i>Podarcis liolepis</i> Species of lizard

Podarcis liolepis, the Columbretes wall lizard or Catalan wall lizard, is very similar to the other lizards in the genus Podarcis. This species was formerly described as a subspecies of the Iberian wall lizard, but has now been elevated to species status. These are slender lizards with long tails, narrow tapered heads and long thin toes, and stout legs. Colours are variable, although generally grey-brown. Often very subtle spots and stripes along the back and flanks can be seen and these can be more distinguished in the female. The underside is a much lighter cream or beige with sometimes a reddish tint. Adults grow 15–20 cm in length from the nose to tip of the tail. Body length can be a little as one third of the total body length, the tail making up the other two thirds.

Thermal ecology is the study of the interactions between temperature and organisms. Such interactions include the effects of temperature on an organism's physiology, behavioral patterns, and relationship with its environment. While being warmer is usually associated with greater fitness, maintaining this level of heat costs a significant amount of energy. Organisms will make various trade-offs so that they can continue to operate at their preferred temperatures and optimize metabolic functions. With the emergence of climate change scientists are investigating how species will be affected and what changes they will undergo in response.

<span class="mw-page-title-main">Island syndrome</span> Set of phenotypical features likely to occur in geographically-isolated populations

Island syndrome describes the differences in morphology, ecology, physiology and behaviour of insular species compared to their continental counterparts. These differences evolve due to the different ecological pressures affecting insular species, including a paucity of large predators and herbivores as well as a consistently mild climate.

<i>Anolis evermanni</i> Species of lizard

Anolis evermanni, also known commonly as the emerald anole, Evermann's anole, and the small green anole, is a species of lizard included within the family Dactyloidae. A. evermanni is native to Puerto Rico, where it is mainly found in wet forests. A. evermanni is a medium-sized lizard and bright emerald-green in color. A. evermanni is studied for its behavior as well as the evolution of the family Dactyloidae. The group of lizards which are member species of the family Dactyloidae are known as anoles. Anoles are found throughout the Americas and are related to iguanas.

References

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