the one of th reasons why coral reef gives intrest to the ecologist and environmentalist is because of the apparent pardox of such higly productive ecosystem , teemig with life being sustained in the realitivity barren enviorment of tropical ocean water . such as The production of chemical energy through photosy=ynthais from a measured area of reef in a measured time are generally at least an order of magnitude greater than in the surrounding 0cean water and rival the highest levels recorded for natural systems. To be sustained , however primary productions requires more than simply the raw materials of photosynthesis . sufficient nutrients plants also need to be present in the environment for the growth of the photosynthetic organisims. The primary productivity then fuels the consumption and lives of al the organism in the eco system . Athough tropic ocean waters are naturally very low for reasons alredy explained. As often in the case the way the coral reefs are productive are through in a complex way . The first distinction must be drawn between gross production that mean by the total amount of chemical energy produced within in a certain time and space.In order for an ecosystem to achieve surplus production , which is a net production needs to be greater than zero Agriculture sytem achieve considerable positive net production. Farmers can therefore deliver large crops to …show more content…
The body of a coral therefore consist of many polyps covering a skeleton that is usally attacked below to hard surface as a rock The tissue overlie the skeleton that is usally attached below to a hard surface such as rock . The tissue overlie the skeleton and take its shape when the polyps are contracted . In this state the living tissue forms a thiny slimmy fil over the skeleton, and the skeletal details can be seen through the tissues. To expand the polyps swell with water , extend their tentacles and rise above the skeleton , pbsucuring its features. The setailed structure of the skelto is dictated by the polyps, each one sitting within and upon its own skeleton, called a corallite. Each corallite has more or less pormous wall, within the space between the adjacent walls within the space filled by porous skeleton or coenosteum. Radiating from the central region of each coralite are numerous thin vertical plates called septa, usally .The septa varies in size the biggest Is called primary septa, the next biggest is secondaries, the third is tertiaries