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Organisms that carry out photosynthesis are called.

Studies have been carried out in that are interspersed with of the Ti-Tree Basin.

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Where Do Bacteria That Carry Out Chemosynthesis Live

Chemosynthetic communities are also found in marine settings other than hydrothermal vents. At so-called cold-seeps, where tectonic activity squeezes mineral water out of the ground and around sea bottom petroleum deposits, methane, ammonia, and hydrogen sulfide are released. Bacteria use these compounds to make organic molecules, which support a web of symbionts, carnivores, and scavengers.

Organisms Carry Out Chemosynthesis – …

China’s was the second pristine civilization to rise, and although the and separated China from the Fertile Crescent and India, there was cultural and technological diffusion. At times, China was ahead of Fertile Crescent civilizations in technological and cultural innovation. By eight kya, agriculture was firmly established in China. China has had less investigation of its prehistory, but it seems clear that China’s deforestation began with agriculture, just like everyplace else, and by 1000 BCE, China was largely deforested. The East Asian food complex is markedly different from the Fertile Crescent's, largely because East Asia relied on summer monsoons for its water, and winter rains provided water for the Fertile Crescent and westward, although civilizations were primarily based on seed and root crops. The rice paddy is the most sophisticated preindustrial agricultural system ever created. It by 3000 BCE, and rice paddies bred malaria to the extent that the paddy system in southern China was not successful until the local populace had partially adapted to malaria. Deforested lands alternately , and managing water in China became the foundation of imperial practice like nowhere else in history. Although , in practice they did nothing at all. Chinese emperors and the states they controlled, however, owed their legitimacy in their subjects’ eyes to how well they controlled flooding and drainage. The Yellow and Yangtze rivers carried more than 30 times the silt that the Nile did, and deforestation with the resulting flooding, siltation, and desertification have been major Chinese problems for thousands of years. Although it has been challenged, the idea that China reached early political unity due to few geographic barriers has merit. China has been politically unified almost continually for more than two millennia. The Han Chinese that dominate China are like white Americans, Canadians, or Australians, in that they invaded, conquered, and came to dominate lands initially settled by others.

What types of organisms carry out chemosynthesis - (2017)

Since humans began to make advanced tools and valuable goods, they exchanged them, , and cities have always been situated on low-energy transportation lanes. Before the Industrial Revolution, these lanes were almost always bodies of water. Before the Industrial Revolution, it took only about 1-2% of the energy to move goods across a body of water, such as a lake or ocean, as it did overland. A peasant in Aztec civilization, for instance, could as easily and quickly bring more than 40 times the weight of goods by canoe on a trip across the lakes to as he could by carrying a load on his back along the causeways. In 1800, it cost as much to ship a ton of goods more than 5,000 kilometers to American shores from England as it did to transport it 50 kilometers overland in the USA. In England, in the 13th century CE, it cost about as much to transport coal across five hundred kilometers of water as it took to move it across five kilometers of land.

Only when economic surpluses (primarily food) were redistributed, first by chiefs and then by early states, did men rise to dominance in those agricultural civilizations. Because the rise of civilization in the Fertile Crescent is the best studied and had the greatest influence on humanity, this chapter will tend to focus on it, although it will also survey similarities and differences with other regions where agriculture and civilization first appeared. Whenever agriculture appeared, cities nearly always eventually appeared, usually a few thousand years later. Agriculture’s chief virtue was that it extracted vast amounts of human-digestible energy from the land, and population densities hundreds of times greater than that of hunter-gatherers became feasible. The , but today it is widely thought that population pressures led to agriculture's appearance. The attractions of agricultural life over the hunter-gatherer lifestyle were not immediately evident, at least after the first easy phase, when intact forests and soils were there for the plundering. On the advancing front of agricultural expansion, life was easy, but as forests and soils were depleted, population pressures led to disease, "pests" learned to consume that human-raised food, and agricultural life became a life of drudgery compared to the hunter-gatherer or horticultural lifestyle. Sanitation issues, disease, and environmental decline plagued early settlements, and not long after they transitioned from hunter-gatherers to farmers, but the land could also support many times the people. Another aspect of biology that applies to human civilization is the idea of . Over history, the society with the higher carrying capacity prevailed, and the loser either adopted the winner’s practices or became enslaved, taxed, marginalized, or extinct. On the eve of the Domestication Revolution, Earth’s carrying capacity with the hunter-gatherer lifestyle was around 10 million people, and the actual population was somewhat less, maybe . On the eve of the Industrial Revolution in 1800, Earth’s population was , and again was considered to be about half of Earth's carrying capacity under that energy regime. No matter how talented a hunter-gatherer warrior was, he was no match for two hundred peasants armed with hoes.

Organisms carry out chemosynthesis

The genetic testing that has been performed on humanity in the past generation has shown that the founder group’s pattern of migration was to continually spread out, and once the original settlement covered the continents, people did not move much at all, at least until Europe began conquering the world (and there were some ). There is little sign of warfare in those early days of migration, and the leading hypothesis is that people moved to the next valley rather than be close enough to fight each other. Any conflict would have been easily resolved by moving farther out, where more easily killed animals lived. Also, in those virgin continents, people need not have roamed far to obtain food. Today, an !Kung woman will carry her child more than 7,000 kilometers before the child can walk for himself/herself. If an !Kung woman bears twins, it is her duty to pick which child to murder, because she cannot afford to carry two. That demonstrates the limitations of today’s hunter-gatherer lifestyle, but in those halcyonic days of invading virgin continents (which had to be the Golden Age of the Hunter-Gatherer), those kinds of practices probably waned and bands grew fast. When they they split, and the new group moved to new lands where the animals, again, never saw people before. Unlike the case with humans, there would not have been a grapevine so that animals told their neighbors about the new super-predator. The first time that those megafauna saw humans was probably their last time. It is very likely, just as with all predators for all time, and as can be seen with historical hunting events such or , that those bands soon took to killing animals, harvesting the best parts, and moving on. To them it would not have been a “blitzkrieg,” but more like kids in candy stores. After a few thousand years of grabbing meat whenever the fancy took them, or perhaps less, those halcyonic days were over as the far coasts of Australia were reached and the easy meat was gone. When that land bridge formed to Tasmania about 43 kya, people crossed and were able to , until all the megafauna was gone on Tasmania. They also may have worked their way through the food chain, in which the first kills were the true mother lode. Nobody even deigned to raise a spear at anything less than a until they were gone. Then they started killing smaller prey, which eventually did wise up and were harder to kill, so humans had to work at it again and the brief golden age was over. The as they shaped the new continent to their liking, maybe recreating the savanna conditions that they left in Africa, may have also been used to flush out animals if they began to avoid humans.

To my knowledge, nobody has ever invoked a climate change hypothesis for the mass extinction of South American mammals when the land bridge formed that , even though the formation of that land bridge probably triggered the current ice age and the North American invasions of South America. Most South American mammal species quickly went extinct when that had survived many millions of years of intercontinental invasions. It was a purely Darwinian event in which animals with greater carrying capacities prevailed. There was no big picture awareness of events by the invaders or invaded, just as there had never been during life’s history on Earth. They all just tried to survive, and previously isolated South American mammals quickly lost the game. The survivors were able to live in niches that no North American animals did, such as .

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Where Do Bacteria That Carry Out Chemosynthesis Live

Peter Ward led an effort to catalog the fossil record before and after Romer’s Gap, which found a dramatic that did not resume until about 340-330 mya. Romer’s Gap seems to have coincided with low-oxygen levels of the late Devonian and early Carboniferous. If coincided with a halt in colonization, just as the adaptation to breathing air was beginning, the obvious implication is that low oxygen levels hampered early land animals. Not just the lung had to evolve for the up-and-coming amphibians, but the entire chest cavity had to evolve to expand and contract while also allowing for a new mode of locomotion. When amphibians and splay-footed reptiles run, they cannot breathe, as their mechanics of locomotion prevent running and breathing at the same time. Even walking and breathing is generally difficult. This means that they cannot perform any endurance locomotion but have to move in short spurts. This is why today’s predatory amphibians and reptiles are ambush predators. They can only move in short bursts, and then have to stop, breathe, and recover their oxygen deficit. In short, they have no stamina. This limitation is called . The below image shows the evolutionary adaptations that led to overcoming Carrier's Constraint. Dinosaurs overcame it first, and it probably was related to their dominance and the extinction or marginalization of their competitors. (Source: Wikimedia Commons)

Where do bacteria that carry out chemosynthesis live

Also, just as no fundamentally new body plans appeared after the Cambrian Explosion, modern ecosystems seem constrained by body size. Body sizes have similar “slots,” and body sizes outside of those slots are relatively rare. However, successful innovation usually happens at the fringes. The fringes are where survival is marginal and innovations carry a high risk/reward ratio. Most innovations fail, but a successful one can become universally dominant, such as those biological innovations that are considered to have happened only . There have been countless failed biological innovations during life’s history on Earth, many of which might have seemed brilliant but did not survive the rigors of living.

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