Eirh
From Gephqua
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For most of Eirh's history the air was the domain of flying arthropod-like organisms very similar to Earth's insects, however millions of years ago during the age of giant mammals a number of arboreal mammal-like beasts (not true mammals, but like them in most respects) and saurians took to flight. While the aviasaurs (flying lizards) did not last long, dying out long ago, a group of flying mammalian creatures, the bat-birds, have thrived. Bat-birds have some of the characteristics of both birds and mammals, they are among the few groups of mammal-like beasts which lay legs rather than giving live birth, they are covered in fur rather than feathers, a few species have beak-like mouths similar to birds while others have toothed-jaws (the beaked species are mostly fruitivores, with a few exceptions). Like birds their front limbs have evolved into wings, rather than like bats which have outstretched arms with a webbing of skin between the front and rear limbs; only a very small few species retain vestigial front claws. They typically nest in trees or, in some cases, rocks; a few island species build their nests on the ground. They are warmblooded, feed their young from milk glands, and are mostly diurnal. They range in size from the very large to the very small. | For most of Eirh's history the air was the domain of flying arthropod-like organisms very similar to Earth's insects, however millions of years ago during the age of giant mammals a number of arboreal mammal-like beasts (not true mammals, but like them in most respects) and saurians took to flight. While the aviasaurs (flying lizards) did not last long, dying out long ago, a group of flying mammalian creatures, the bat-birds, have thrived. Bat-birds have some of the characteristics of both birds and mammals, they are among the few groups of mammal-like beasts which lay legs rather than giving live birth, they are covered in fur rather than feathers, a few species have beak-like mouths similar to birds while others have toothed-jaws (the beaked species are mostly fruitivores, with a few exceptions). Like birds their front limbs have evolved into wings, rather than like bats which have outstretched arms with a webbing of skin between the front and rear limbs; only a very small few species retain vestigial front claws. They typically nest in trees or, in some cases, rocks; a few island species build their nests on the ground. They are warmblooded, feed their young from milk glands, and are mostly diurnal. They range in size from the very large to the very small. | ||
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| + | Some species of bat-birds have been domesticated, particularly the "dog birds", after millennia of breeding have become a staple of Gephquanese domestication. | ||
==Phototrophs== | ==Phototrophs== | ||
Revision as of 04:00, 2 October 2007
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| Adjective Form: | Eirhan | |
| Location: | The Korah System | |
| Solar Position: | 5th | |
| Inhabitants: | The Gephqua | |
| Percent Water: | 85% | |
| Percent Land: | 15% | |
| Day Length: | 71.32 Hours | |
| Year Length: | 1,236 Days | |
| Mass: | 1.25 Earths | |
| Circumference: | 31,125 Miles 50,090 Km | |
| Moon(s): | Rona | |
| Aphelion Distance: | 447,838,164 Miles 720,725,662 Km 4.818 AU | |
| Perihelion Distance: | 403,419,582 Miles 649,240,883 Km 4.34 AU | |
| Axial Tilt: | 24.137° | |
| Surface Temp: Min: Mean: Max" | 12 °F (-11 °C) 77 °F (25 °C) 127 °F (53 °C) | |
| Atmospheric Composition: | 70.01% Nitrogen 28.89% Oxygen 1.001% Argon 0.099% CO2 0.01% H2O Vapor | |
Eirh is the fifth planet of the Korah system and is the second largest terrestrial planet. It is often called "HaEirh", "Home World", or simply "The World".
Home to millions of life forms, including the dominant species, the Gephqua. The planet formed roughly 5.2 billion years ago, with life having only appearing on the planet just over a billion years ago. Over this period of time Eirh's biosphere has changed considerably, along with all its other planetary systems.
The planet's surface, like that of Earth, is covered in tectonicplates which move slowly across the surface of the planet. The vast majority of the planet's surface (about 85%) is covered in water, of that most of it is fresh water; the remainder of the planet's surface is covered with land, the largest land mass on the planet being the Great Continent which comprises the bulk of the planet's 15% land area. Eirh's interior is active, with a thick layer of mantle, below which is a dense molten core.
The planet's chief cosmic interaction is between its star, Korah, and its moon, Rona. Eirh orbits Korah once for every 412.51 times it rotates on its axis (i.e. an Eirhan year takes 412.51 Eirhan days), which equals to about 1,236 Terran days or about 3½ Terran years. Eirh has an average orbital distance from Korah of 425,628,873 miles or 4.578 AU, making Eirh about four times further from Korah as Earth is from the Sun; Eirh needs to be this far away due to Korah's significantly more intense presence than Sol. The planet's axis is tilted to about 24°, allowing for seasonal variations throughout the year, however temperate they might be. Eirh has only one moon, Rona, which is believed to be a captured object. Unlike our moon, Rona is not tidally locked, which means from an Eirhan observer the moon rotates upon its own axis. Rona effects the tides, helps stabalize the planet's axial tilt and is believed to be gradually slowing down Eirh's rotation.
Roughly 550 million years ago the planet suffered the Great Axial Shift, a large cosmic body collided with the planet's surface with such force that it considerably shifted the planet's axis from a 42° angle to the 24° angle it now has--the event was so catastrophic that it ended virtually all life on the planet. It's believed that roughly 99% of the planet's life went extinct in the event and is considered one of the most important events in the planet's evolutionary history.
Contents |
Planetary Evolution
Physical Characteristics
Geology
Hydrosphere
Geography
Atmosphere
Weather and Climate
Climate Zones
Equatorial Zone
Temperate Zone
Twighlight Zones
Weather Phenomenon
Magnetic Field
Orbit and Rotation
Divisions of Time
Great Axial Shift
Moon
Biosphere
Eirh is home to countless millions of species of organisms. Due to eighty-five percent of the planet being covered in oceans, the majority of all life exists in the seas, of that the majority are microscopic organisms.
Of these varied forms of life it is worth taking a closer look at some of the notable components of the Eirhan biosphere.
Animal Life
Animal life is defined as organisms that are heterotrophic; that is, they require sustenance upon something different from them selves; as opposed to autotrophs which produce their own sustenance (such as the phototrophs); and which are motile at least at some stage in their lifespan. The animal life on Eirh ranges from microscopic, unicellular organisms to vast, robust multicellular organisms--including the Gephqua themselves which are the most advanced lifeforms on the planet and its only sentient species.
Sea Gels
Occupying a similar niche as Earth's jellyfish, the sea gels resemble overgrown unicellular organisms, though they are multicellular. Most have flat bodies, and they propel themselves through the water with an flagellum-like appendage, while undulating their body to help swim. They are predatory, usually feeding upon anything smaller than themselves. To feed they will wrap themselves over the body of an organism, and inject a toxic enzyme which both stuns or kills (depending on the species) its prey as well as begins breaking down the tissue which is absorbed directly by the sea gel through its cellular membrane. These animals are asexual, and reproduce by mitosis, producing a "bud" which eventually separates from the parent creature, the offspring is an exact genetic duplicate of the parent. Sea gels can be found throughout Eirh's oceans, and range in size and shape from the nymph sea gel (about the size of a pencil eraser) to the giant phantom (about six feet long, including its flagellum). Due to their toxin, swimmers are always cautious when swimming in the seas, as even some species of small sea gels have enough toxin to kill an adult Gephqua.
Placocalvae
A group of bony-headed, endothermic, air-breathing, marine animals superficially resembling cetaceans (Earth whales and dolphins). Evolving from land-dwelling animals from the same clade of organisms as the Gephqua, that is anuraforms--recognized for their smooth skin, similar to that of Earth's amphibians, but lacking the characteristic "sliminess", since they do not need to continually keep their skin moist, they are also endothermic (warm-blooded) tetrapods; and almost all anuraforms lay eggs. The placocalvae are an exclusively predatory group, even the whale-sized specimens are hunters. The most feared hunter in the seas is the bone-crusher whale, seventy feet long with a bony beak that can cut through the bones of even large prey; however very few will attack people. The smaller fish-dolphins, which have the friendly, intelligent and playful demeanor of Earth's dolphins (though about the length of a large salmon) are usually found swimming in pods, jumping and playing and tend to be attracted to ships and have long been seen as a good omen to sailors. All placocalvae breathe through their nostrils, located near the eyes on the top of their armored heads, when a large placocalvae surfaces to breathe its exhalation is very reminiscent of Earth's whales.
Bat-Birds
For most of Eirh's history the air was the domain of flying arthropod-like organisms very similar to Earth's insects, however millions of years ago during the age of giant mammals a number of arboreal mammal-like beasts (not true mammals, but like them in most respects) and saurians took to flight. While the aviasaurs (flying lizards) did not last long, dying out long ago, a group of flying mammalian creatures, the bat-birds, have thrived. Bat-birds have some of the characteristics of both birds and mammals, they are among the few groups of mammal-like beasts which lay legs rather than giving live birth, they are covered in fur rather than feathers, a few species have beak-like mouths similar to birds while others have toothed-jaws (the beaked species are mostly fruitivores, with a few exceptions). Like birds their front limbs have evolved into wings, rather than like bats which have outstretched arms with a webbing of skin between the front and rear limbs; only a very small few species retain vestigial front claws. They typically nest in trees or, in some cases, rocks; a few island species build their nests on the ground. They are warmblooded, feed their young from milk glands, and are mostly diurnal. They range in size from the very large to the very small.
Some species of bat-birds have been domesticated, particularly the "dog birds", after millennia of breeding have become a staple of Gephquanese domestication.
Phototrophs
What we might typically call "plants", organisms that feed primarily through the absorption of light via photosynthesis. On Eirh two similar, but completely unrelated, "plants" exist. The most familiar are the phototrophs that consume primarily blue light, and photosynthesize it into simple sugar compounds--these typically have a green or greenish color to their photosynthetic components due to their cells containing a substance similar to chlorophyll. The other variety of phototrophs are those which feed upon ultraviolet light, due to Korah's (the sun) status as a Type A/Type F blue star there is considerable amount of ultraviolet light which radiates the planet; since these "plants" absorb only ultraviolet light they reflect all the other frequencies of the spectrum which gives them a white or off-white appearance in their photosynthetic components. The fields of deep green grasses which cover most of the planet's land surfaces are an example of the former, while the white fern forests in the northern Twightlight Belt is an example of the latter.
Fungi
Other
There are a number of lifeforms that don't fit the traditional norm on Eirh, various forms of unicellular organisms which can not be classified as animal, plant or fungi, though a few multicellular organisms also are strange in their own way.
Grub Trees
A very peculiar organism is the grub tree. It begins its life seemingly as an animal, but after a metamorphosis becomes planet-like. They hatch from egg-pods in a larval stage, and have the appearance of a small grub (hence their name) without any legs with small mouth parts, the larva have no eyes but rather pick up scent through their oral cavity. Grub tree larva move around, inching their way on the ground, feeding mostly upon small fungi (or in some species plant roots), they live to feed and will continue to engorge themselves for several months, or even a year or two in a few species, after having sufficiently engorged themselves (usually doubling their mass), they will bury themselves in the ground, and encase themselves with an enzyme which produces a cocoon, in which they radically transform. In the cocoon the larva undergo metamorphosis and develop chloroplasts in their cells, after a period of time the cocoon erupts with tendrils reaching out into the soil and what was the grub's body grows upward until it breaks the topsoil where its flesh has hardened, reaching out toward the sunlight it sprouts stem-like structures covered in thick leafy hairs. The grub tree, at this point, is no longer remotely animal but mostly plant, it no longer has any internal organs of any kind, nor any mouth parts. The grub tree in its "adult" feeds exclusively through photosynthesis, converting sunlight into simple sugars, while absorbing nutrients from the soil, "adult" grub trees can live for an exceptionally long time. At the top end of its body-stock is the reproductive parts of the organism, the ovum in females, and the spermum for the males. The spermum produces spermaphores which are usually taken by various animals and deposited in the ovum of the species, similar to how bees pollinate flowers on Earth. When the spermaphores are in the ovum of the female grub tree, egg-spores are fertilized which then blossom into a cluster of egg-pods, the egg-pods will grow until they "ripen" at which they will fall to the ground and larval grubs emerge from the pod.
