Blackbelly salamander | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Amphibia |
Order: | Urodela |
Family: | Plethodontidae |
Subfamily: | Plethodontinae |
Genus: | Desmognathus |
Species: | D. quadramaculatus |
Binomial name | |
Desmognathus quadramaculatus (Holbrook, 1840) | |
Synonyms | |
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The blackbelly salamander (Desmognathus quadramaculatus) is a species of salamander in the family Plethodontidae. It is endemic to the United States. [2] Its natural habitats are rivers, intermittent rivers, and freshwater springs. It is threatened by habitat loss. [1]
The blackbelly salamander is a medium-sized salamander growing to about 10 to 18 centimetres (3.9 to 7.1 in) long. It is sturdily built with a long tail. The ground colour is dark brown or black with two rows of small pale spots along each side of the back. The underside is usually black but may have pale flecks in young individuals. [3]
They are highly variable in color, with the ground color ranging from a light gray to deep black. Their color has been recorded in one study to be related to their habitat. Populations that are only a few meters away can have drastic differences phenotypically, depending on the habitat differences. This study showed that two populations in the same stream were vastly different in color. This could be related to the amount in shade, leaf litter, and rock color of their habitat. [4]
The blackbelly salamander is found in the Appalachian Mountains in southeastern United States. Its range extends from West Virginia, through southeastern Virginia, eastern Tennessee, western North and South Carolina, and northern Georgia. It is a largely aquatic species and lives in cold mountain streams at heights of 375 to 1,725 metres (1,230 to 5,659 ft) above sea level. [5]
The blackbelly salamander spends more time in water than all other members of the genus except the shovelnose salamander (Desmognathus marmoratus). [5] It mainly forages on land and has a home range of at least 1,200 square centimetres (190 square inches) but seldom travels more than 30 centimetres (12 in) from the stream. [5] In this home range it has one or more refugia, crevices in the rock or burrow entrances in which it can conceal itself, ambushing small invertebrates as they pass by. Their diet shifts throughout the different stages of their life. During their larval stage they prey mostly on insect nymphs, when juveniles they will eat a mixture of aquatic and aerial prey, and when they are adults they eat aquatic, aerial, and terrestrial prey including other salamanders. [6] It defends these refugia against other members of its own species. [5] Salamanders will violently defend this refugia even resorting to cannibalism [7]
Breeding takes place in the late spring. The female attaches fifteen to forty eggs to the base of submerged boulders. The eggs hatch in about three months and the larvae develop slowly, undergoing metamorphosis into juvenile salamanders about three and a half years later. [3] [8] Research has shown that these larval salamanders can detect differences in each fish to know which is a predator. [9]
Several other species of salamander occupy the same range as the blackbelly salamander. These include the dusky salamander (Desmognathus fuscus), the Allegheny Mountain dusky salamander (Desmognathus ochrophaeus), and the seal salamander (Desmognathus monticola). Blackbelly salamanders have been shown to push Dusky salamanders out of the coveted stream splash zones, and have also been observed preying on the Duskys. [10]
Blackbelly and seal salamanders seem to actively avoid each other and it is possible that they use chemical cues to avoid coming into contact. [5] They are sometimes attacked by garter snakes (Thamnophis sp.). The blackbelly salamander's defence strategies include its warning colouration (though it is not in fact toxic), remaining still in the hope a predator will fail to notice it, biting the aggressor, and shedding its tail (autotomy) as a distraction. Biting was successful against garter snakes and was also used against shrews. [5]
The IUCN Red List of Threatened Species lists the blackbelly salamander as being of "Least Concern". The reasons given are that the population seems stable with an estimated number of at least 10,000 individuals. It might decline in some localities if streams become acidic as a result of mining activities, and in some places, fishermen capture it for use as bait. [1]
The eastern newt is a common newt of eastern North America. It frequents small lakes, ponds, and streams or nearby wet forests. The eastern newt produces tetrodotoxin, which makes the species unpalatable to predatory fish and crayfish. It has a lifespan of 12 to 15 years in the wild, and it may grow to 5 in (13 cm) in length. These animals are common aquarium pets, being either collected from the wild or sold commercially. The striking bright orange juvenile stage, which is land-dwelling, is known as a red eft. Some sources blend the general name of the species and that of the red-spotted newt subspecies into the eastern red-spotted newt.
The seepage salamander is a small, terrestrial species of salamander in the family Plethodontidae. It is endemic to the United States. They are found in small areas of Tennessee, North Carolina, Georgia, and Alabama. Its natural habitats are temperate forests, intermittent rivers, and freshwater springs. It gets its name from the seepages around which it lives. It is very similar in its appearance and life history to the pygmy salamander. These two species differ greatly from the other Desmognathus species. They are the smallest salamanders in the genus, measuring only 3–5 cm (1–2 in) in length. They are also the only two terrestrial, direct-developing Desmognathus species. However, the two species are not often seen to coexist, differing in distribution by elevation; although there are exceptions. The seepage salamander is currently listed as Near Threatened, with its numbers declining in most of states in which it is found. It is threatened by habitat loss, with logging having a major effect.
The dwarf black-bellied salamander is a species of salamander in the family Plethodontidae. It is endemic to the United States.
Desmognathus fuscus is a species of amphibian in the family Plethodontidae. The species is commonly called the dusky salamander or northern dusky salamander to distinguish it from populations in the southern United States which form several distinct species, the southern dusky salamanders. The northern dusky salamander is the most widespread representative of its genus in Canada. It can be found in eastern North America from extreme eastern Canada in New Brunswick south to South Carolina. The size of the species' total population is unknown, but is assumed to easily exceed 100,000. The species' habitat differs somewhat geographically; dusky salamanders in the northern part of the range prefer rocky woodland streams, seepages, and springs, while those in the south favor floodplains, sloughs, and muddy places along upland streams. They are most common where water is running or trickling. They hide under various objects, such as leaves or rocks, either in or near water. Alternatively, they may enter burrows for protection. The dusky salamander lays its eggs close to water under moss or rocks, in logs, or in stream-bank cavities. The larval stage which follows is normally aquatic.
The shovelnose salamander is a species of salamander in the family Plethodontidae. It is endemic to the United States.
The ocoee salamander is a species of salamander in the family Plethodontidae. This salamander has a variety of colors and patterns, and got its name from Tennessee state wildflower. Its natural habitats are temperate forests, rivers, intermittent rivers, freshwater springs and wet rocks in mountainous areas of the Southeastern United States. It was first described by Nicholls in 1949. They are territorial and feed on small invertebrates. It is widely distributed in the southeastern United States and is listed as "Least Concern" by the International Union for Conservation of Nature.
The black mountain salamander is a species of salamander in the family Plethodontidae.
The pygmy salamander is a species of salamander in the family Plethodontidae. It is endemic to the United States in the southern Appalachians in North Carolina and Tennessee. Desmognathus wrighti is a member of the family Plethodontidae and is commonly known as the pygmy salamander. As the name suggest the pygmy salamander is the smallest of the nineteen species in the genus Desmognathus. D. wrighti undergoes direct development and does not have a free-living larval stage. Only two other taxa in Desmognathus, D. aeneus and D. organi, exhibit direct development along with the pygmy salamander. In the genus Desmognathus, body size, habitat preferences, and patterns used by males during courtship are quite variable. D. wrighti courtship is noted by the male biting and seizing its partner in order to provide them with a chemical stimulus. The pygmy salamander can be found in the southern Appalachians of the United States in western North Carolina and eastern Tennessee. Geographical distribution of the Desmognathus wrighti is fragmented and the highest abundance of the species can be found at high elevations in spruce and fir tree forest.
The northern two-lined salamander is a species of salamander in the family Plethodontidae found in Canada and the United States. Its natural habitats are temperate forests, temperate shrubland, rivers, intermittent rivers, freshwater marshes, freshwater springs, arable land, and urban areas. It is more water-oriented than the related northern redback salamander, and can often be found in and around water such as rain puddles, streams, swamps, and damp stream beds, whereas the northern redback tends to be found in damp ground, but usually not near open water.
The three-lined salamander is a species of salamander in the family Plethodontidae. It is endemic to the south-eastern United States. Like other Plethodontidae species, E. guttolineata captures prey via tongue projection.
The Blue Ridge two-lined salamander is a species of salamander in the family Plethodontidae, endemic to the United States. This species is found in the southern Appalachian Mountains, mostly south of Virginia. To the north is a similar salamander, Eurycea bislineata, or the northern two-lined salamander. Its genus, Eurycea contains 33 species and includes taxa that have either a metamorphic life cycle or larval-form paedomorphosis. In species that metamorphose, there can be within-and among-population variation in larval life-history characteristics, e.g., duration of the larval period and size at metamorphosis. Intraspecific geographic variation in species of Eurycea has been attributed to several factors: temperature, stream order and productivity of the larval habitat.
The red-cheeked salamander, also known as the Jordan's salamander, Jordan's redcheek salamander, or Appalachian woodland salamander, is a species of salamander in the family Plethodontidae. It is endemic to the Appalachian Mountains in the eastern United States.
The mud salamander is a bright red salamander of the family Plethodontidae. It is found in streams, seeps and swamps and underneath logs, rocks and leaves. It is endemic to the eastern half of the United States with one isolated population in central Mississippi. Mud salamanders are rarely seen plethodontids that inhabit muddy wetland and riparian habitats. Mud salamanders don’t generally live above 700 meters in elevation in the Appalachian Mountains, resulting in two geographically isolated populations. Mud salamanders have short stocky bodies ranging from 7.5 to 16 cm long. Body color ranges with age and locality. There are four subspecies in the mud salamander complex, namely the Gulf Coast mud salamander, rusty mud salamander, Midland mud salamander and the eastern mud salamander. Mud salamanders are ectothermic, meaning that they cannot control their body temperature and it fluctuates with the temperature. The mud salamander is readily confused with two other species, the red salamander and the spring salamander.
The red salamander is a species of salamander in the family Plethodontidae endemic to the eastern United States. Its skin is orange/red with random black spots. Its habitats are temperate forests, small creeks, ponds, forests, temperate shrubland, rivers, intermittent rivers, freshwater, trees springs. Overall this species is common and widespread, but locally it has declined because of habitat loss and it is considered threatened in Indiana. Red salamanders eat insects, earthworms, spiders, small crustaceans, snails, and smaller salamanders. To eat, they extend their tongue to capture prey on the tip of it and retract it back into their mouths. The red salamander, as a member of the family Plethodontidae, lacks lungs and respires through its skin.
The California giant salamander is a species of salamander in the family Ambystomatidae. Dicamptodon ensatus is endemic to California, in the western United States. The species once additionally included individuals now belonging to the species D. aterrimus and D. tenebrosus, under the common name Pacific giant salamander, which now refers to the genus and family.
The western terrestrial garter snake is a western North American species of colubrid snake. At least five subspecies are recognized.
The blackbelly garter snake is a species of snake of the family Colubridae. It is found in Mexico.
The northern pygmy salamander is a terrestrial species of salamander in the family Plethodontidae and genus Desmognathus. Along with the southern pygmy and the seepage salamander, these are some of the smallest salamander species in North America and can be found in higher elevations in the southern Appalachians.