Полнотекстовый поиск:
Где искать:
только в названии
только в тексте
слова в тексте
только заголовок

Рекомендуем ознакомиться

Остальные работы->Реферат
When children are taught how to tie their shoes, it is because of how their parents showed them. When children are taught how to do math problems it i...полностью>>
Остальные работы->Реферат
Well here?s the answer; they were all forms of torture a long time ago. Iron Maiden?s were female effigies constructed of wood or iron with the inside...полностью>>
Остальные работы->Реферат
In November of 1919, at the age of 40, Albert Einstein became an overnight celebrity, thanks to a solar eclipse. An experiment had confirmed that ligh...полностью>>
Остальные работы->Реферат
1.Introduction. This report investigates the epic battle between the Australian Rugby League which has been around for 87 years and the Super League c...полностью>>

Главная > Реферат >Остальные работы

Сохрани ссылку в одной из сетей:

Ocean Deep Essay, Research Paper

Snelgrove and Grassle in The Deep Sea: Desert and Rainforest published in Oceanus, volume 38 in 1995 argue that the popular belief that the deep sea is little more than an ?ocean desert? is a pure fallacy. Contrary to such thinking a multitude of benthic organisms dwell on the ocean bottom; despite the frigid temperatures and high pressure, a large heterogeneity of creatures, rivaling in variety and number those inhabiting tropical rainforests, thrive in this environment.

The ?analogy of the ocean desert? arose from the technologically inadvanced photographs and sampling equipment prior to the 1960?s (25). However, it was during that decade that WHOI biologists Sanders and Hessler, employing an epibenthic sled, produced extremely varied samples of organisms from deep-sea communities. The epibenthic sled permitted researchers to observe organisms that had previously gone unnoticed; unknown to the scientific community was a varied population of macrofaunal benthos inhabiting the bottom sediment, in addition to new species of polychaetes, crustaceans, and mollusks. Further sampling in the 1980?s, with the use of a box corer, revealed an astoundingly heterogeneous population of benthic organisms equal, or perhaps more expansive in variety than the number of species residing in the tropical rainforests. Therefore, though the deep-sea may physically resemble a desert with its ?large expanses of . . . gently rolling contours of mud or sand with little visible life,? in reality it is an ecosystem teeming with life (27). Such diversity was most noteably evidenced by a sample taken from an area no larger than seven feet by seven feet off the coast of Charleston, South Carolina where a total of 1,597 divergent species were recovered from the ocean bottom in a single sampling.

The heterogeneity among species is also apparent with respect to both ?space and time? (28). Observations have revealed that different species dwell in different patches along the ocean bottom; this patchwork of species is what, in effect, provides all species in the deep-sea with adequate sustenance. Phytoplankton blooms, sinking fish carcasses, pieces of wood, pieces of seaweed, disturbances created by fish feeding, and the polychaete fecal mounds all create microhabitats within the larger habitat of the ocean bottom; different species derive sustenance from different patches or microhabitats generated by such activities. In addition, seasonal changes and the passage of time affect these microhabitats and thus, those organisms present in each. Therefore, it is the heterogeneity of the deep-sea habitat with its mosaic of patches that permits the great diversification of life on the ocean floor.

Given the harsh conditions of the deep-sea environment researchers still possess limited knowledge about its residents, namely macrofaunal benthos and their smaller counterparts, meiofaunal benthos, which are both relatively recent discoveries. With such as the case it is estimated that many species remain undiscovered in the biologically rich ocean bottom. One cannot help but marvel at the level of diversity of life forms in the deep-sea; I am personally amazed by the ability of such an seemingly barren landscape to harbor and support so many aspects of life. The great diversification of the deep-sea excites the human curiosity as to what other mysteries and wonders remain undiscovered in our deep ocean basins, which until recent have remained a complete unknown.

Загрузить файл

Похожие страницы:

  1. Ocean Enviroment Essay Research Paper Ocean EnvironmentThe

    Реферат >> Остальные работы
    Ocean Enviroment Essay, Research Paper Ocean Environment The sea is ... for great distances throughout the deep ocean. The current patterns in ... chains develop. In the deep ocean much of the initial ... Oceans, rising abruptly from the deep seas. A few centuries ...
  2. My Weekend Essay Research Paper

    Реферат >> Остальные работы
    My Weekend Essay, Research Paper What I Did this ... I had been to the ocean twice before, but only ... also amazingly different from ocean water. The intensity of ... about seven or eight feet deep, and that’s where ... peach to deep orange, pale pink to deep fusca and ...
  3. Yoga Meditation Essay Research Paper

    Реферат >> Остальные работы
    Yoga Meditation Essay, Research Paper In the ... spine (?Chakras and Meditation?). Each chakra isthought of as ... easier to be in deep meditation than outin ... are driven by a force deep insideand it doesn’t matter ... everyone is in an ocean moving together (Smith,237 ...
  4. JD Salinger Essay Research Paper

    Реферат >> Остальные работы
    J.D. Salinger Essay, Research Paper “Salinger’s Reality ... goose flying over a deep blue ocean with a lighter blue ... High School, English 11 research Paper. Maynard, Joyce. “ ... Salinger.” Contemporary Literary Criticism. Gale Research Company. 1975. “Salinger, ...
  5. Cmu Essay Essay Research Paper

    Реферат >> Остальные работы
    Cmu Essay Essay, Research Paper “A University should be a place of ... would allow me to dive into an ocean full of opportunities and ...

Хочу больше похожих работ...

Generated in 0.0026161670684814