What would go on to the earth’s terrestrial and aquatic species ( a ) if most of the world’s oceans disappeared and ( B ) if most of the world’s land disappeared? a ) More than two- tierces of the earth’s surface is covered with oceans. These oceans support up to nine collapsible shelters of the habitable environmement without which most the life beings will die. Several life signifiers are supported by the oceans. The coral reefs. salt fens and sea grass beds are exampls of ocean environments which support a big figure of species which live in mutualism. It is critical to observe that ocean H2O support land- home beings.

The oceans influence the clime andd weather therefore impacting life on land. The H2O from the ocean evaporates and rises. It so cools and signifiers rainfal which is of import for the endurance of land -dwelling beings. The rainfall is besides the footing of rivers and lakes. It can hence be concluded that if the oceans disapeared. most of the life beings will dissapear. Possibly a few organisns will remanin from the small H2O available but finally it will dry up and no more life on Earth. B ) If most of the land disapeared. most land flora would dissapear.

This means less nutrient for land animate beings hence most land animate beings would decease. Some aquatic animate beings depend on land for reproduction. Thus deficiency of land may do extinction of such animate beings. This may do imblance of life in the ocean causign the decease of more life. It can be argued that most beings would dissapear but some aquatic animate beings will last. Why do comeuppances and north-polar tundra support much smaller biomass of animate beings than do tropical woods? Why do most animate beings in tropical rain forest live in its trees? Arctic tundra occur at high latitudes. They receive small H2O as precipitation.

Howewer. their dirt remains wet since there is small vaporization due to low temperatures. Besides the low temperatures lead to freeze of the dirt therefore prevenitng belowground drainage. The low temperature affects the dirt and clime in general and can non prefer the endurance of many animate beings. This impplies low biomass. In the comeuppances there is a batch of heat and deficiency of H2O. Therefore desert animate beings must develop serveral versions in order to last. Most are noctunal. Due to extra care the animate beings need to last. they may non acquire favorable conditions for cohabiation therefore low rate of reproduction.

Most carnal species can non last in the desert taking to low biomass. On the other manus toripical woods receive much rain and heat throught the twelvemonth and therefoe consist of tall trees. Due to handiness of nutrient and favorable clime many animate beings live in the forets. The carnal reproduce faster than in the comeuppances. This consequences to a greater biomass. Many animate beings in the forest unrecorded in trees since they have to follow themselves to the woods. The trees are tall and hence the animate beings have to mount to happen nutrient and sunshine. The insects and birds largely depend on nector which has to be found high up the trees.

How would you answer to person who argues that we should non worry about our effects on natural systems because natural sequence will mend the lesions of human activities and reconstruct the balance of nature? If nature is left alone it will ever mend itself. Human activities deplete natural resources at a rate faster than it can prolong. Due human activities. there has been devastation of home grounds. Forests have been destroyed which will take several old ages to retrieve. In the seas and oceans. there has been overuse of fish which bring about instability of aquatic ecosystems.

Many fish species have become nonextant which affects all beings in the nutrient concatenation. Human activities have besides brought about planetary heating which has led to climate alteration. This alteration leads to extinction of works and carnal species. Man has besides brought in some foreign species of workss and animate beings which may impact those beings in their natural home ground. How would you answer to person who contends that attempts to continue natural systems are non worthwhile because nature is mostly unpredictable? One can reason that nature is unpredictable. However. most of the ways of nature are known.

For case it is known fish eat planktons. It is expected that if there is overfishing. there would be extra of phytoplankton. This will impact all other members in the nutrient ironss. Consequently marine life would be affected. Excess phytoplankton may disintegrate and do farther harm. Some members in the nutrient concatenation may go nonextant. Besides careless usage of chemicals affects the sea life therefore destabilising the sea life. Inasmuch natural catastrophes and the class of nature may do harm. consider harmful activities cause great harm rapidly than would hold been caused by natural catastrophes.