Q and A Banners

Q and A Banner - #3 (World Records-1)


SomeType of Salamander...

Snot Otter
The snot otter, more officially known as the hellbender salamander or Cryptobranchus alleganiensis, is North America’s most super-sized salamander, growing up to 30 inches long. It inhabits streams and rivers from Arkansas to New York, and has evolved very little since the time of dinosaurs.

Hellbenders are ecologically significant for many reasons, including their uniqueness. These salamanders are much larger than any others in their endemic range, they employ an “unusual” means of respiration (which involves cutaneous gas exchange through capillaries found in their dorsoventral folds), and they fill a particular niche—both as a predator and prey—in their ecosystem which either they or their ancestors have occupied for around 65 million years.

Once a hellbender finds a favorable location, it generally does not stray too far from it—except occasionally for breeding and hunting—and will protect it from other hellbenders both in and out of the breeding season. While the range of two hellbenders may overlap, they are noted as rarely being present in the overlapping area when the other salamander is in the area. The same researchers claim the species is at least somewhat nocturnal, with peak activity being reported by one source as occurring around “two hours after dark” and again at dawn (although the dawn peak was recorded in the lab and could be misleading as a result). Nocturnal activity has been found by at least one set of researchers to be most prevalent in early summer, perhaps coinciding with highest water depths.

A Kind of Lava Flow...

Hawaii is well known to have been created from volcanic activity, and the geologic hotspot below the islands is the most studied in the world. In this image, we see a type of lava flow known as pahoehoe at Kilauea. The image was used to illustrate a December Science article titled “Mantle Shear-Wave Velocity Structure Beneath the Hawaiian Hot Spot.”
Pāhoehoe lava from
 Kīlauea volcano,
Hawaii, United States

Pāhoehoe (meaning "smooth, unbroken lava"), also spelled pahoehoe, is basaltic lava that has a smooth, billowy, undulating, or ropy surface. These surface features are due to the movement of very fluid lava under a congealing surface crust. The Hawaiian word was introduced as a technical term in geology by Clarence Dutton.

A pāhoehoe flow typically advances as a series of small lobes and toes that continually break out from a cooled crust. It also forms lava tubes where the minimal heat loss maintains low viscosity. The surface texture of pāhoehoe flows varies widely, displaying all kinds of bizarre shapes often referred to as lava sculpture. With increasing distance from the source, pāhoehoe flows may change into ʻaʻā flows in response to heat loss and consequent increase in viscosity. Pahoehoe lavas typically have a temperature of 1100 to 1200 °C.

The rounded texture makes pāhoehoe a poor radar reflector, and is difficult to see from an orbiting satellite (dark on Magellan picture).

Source | Source

A Type of Mushroom...

Large yellow fungus shelves
attached to tree trunk
When walking in the woods, if you stumble upon a large yellow or orange shelved mushroom growing on a tree, it is quite possible you have found a species of Laetiporus, colloquially known as chicken of the woods, among other name variations. If cooked correctly, it does in fact taste like chicken.
Laetiporus is a genus of edible mushrooms found throughout much of the world. Some species are commonly known as sulphur shelf, chicken of the woods, the chicken mushroom, or the chicken fungus because many think they taste like chicken.

Individual "shelves" range from 2-10 inches across. These shelves are made up of many tiny tubular filaments (hyphae). The mushroom grows in large brackets - some have been found that weigh over 100 pounds (45 kg). It is most commonly found on wounds of trees, mostly oak, though it is also frequently found on eucalyptus, yew, sweet chestnut, and willow, as well as conifers in some species. Laetiporus species produce brown rot in the host on which they grow.

Young fruiting bodies are characterized by a moist, rubbery, sulphur-yellow to orange body sometimes with bright orange tips. Older brackets become pale and brittle almost chalk like, mildly pungent, and are often dotted with beetle or slug/woodlouse holes. Similar species include Laetiporus gilbertsonii (fluorescent pink, more amorphous) and L. coniferica (common in the western United States, especially on red fir trees). Edibility traits for the different species have not been well documented, although all are generally considered edible with caution.
L. sulphureus in Belgium
The sulphur shelf mushroom sometimes comes back year after year when the weather suits its sporulation preferences. From late spring to early autumn, the sulphur shelf thrives, making it a boon to mushroom hunters and a bane to those concerned about the health of their trees. This fungus causes a brown cubical rot and embrittlement which in later stages ends in the collapse of the host tree, as it can no longer flex and bend in the wind.

The mushroom can be prepared in most ways that one can prepare chicken meat. It can also be used as a substitute for chicken in a vegetarian diet. Additionally, it can be frozen for long periods of time and retain its edibility. In certain parts of Germany and North America, it is considered a delicacy.
In some cases eating the mushroom "causes mild reactions . . . for example, swollen lips" or in rare cases "nausea, vomiting, dizziness and disorientation" to those who are sensitive This is believed to be due to a number of factors that range from very bad allergies to the mushroom's protein, to toxins absorbed by the mushroom from the wood it grows on (for example, Eucalyptus or Cedar), to simply eating specimens that have decayed past their prime. As such, many field guides request that those who eat Laetiporus exercise caution by only eating fresh, young brackets and begin with small quantities to see how well it sits in their stomach.
Laetiporus sulphureus has potent ability to inhibit staph bacteria (Staphylococcus aureus), as well as moderate ability to inhibit the growth of Bacillus subtilis


No comments:

Post a Comment

Thanks for leaving a comment - it is welcomed!☺