how do the creatures in the abyssal zone survive without sunlight

This is the part of the open ocean that extends from a depth of about 1,000 to 4,000 m (that is 3,300 to 13,100 ft) this lies below the ocean surface. The bathyal zone or the bathypelagic zone, which means ‘midnight zone. The cold-water bathyal corals are here found in the sub-Arctic to the equatorial regions. The terrigenous bottoms which are located near the continents support the most abundant suspension and it is a home for the mud-eating populations. The bottom dwellers in the zone with adequate circulation get adapted to the local substrate conditions. This condition is caused by the constancy of the bathyal environmental conditions, moreover about the temperature. However, the single-habitat species diversity is higher for the bathyal fauna. In some middle- to high-latitude areas, the number of individuals in this bathyal faunal assemblage is generally only half as large as in the shallow-water fauna. Though in the upwelling and counter-currents can create favourable conditions for aquatic life like fish and other organisms. The Bathyal fauna reflects how the narrow ranges of temperature and salinity occur.Īt the bathyal depths, here the currents are exceedingly slow, also in many areas, the bathyal waters are quite deeper than 1,000 m (that is 3,280 feet) this water is essentially stagnant, which results in low oxygen concentrations and impoverished faunal levels. While it varies with local conditions of water-mass formation.

The salinities typically range between 34 and 36 parts per thousand in the bathyal zone. Except for this place, the normal temperatures range between 5° and 15° C (that is 41° and 59° F), the western oceanic margins are warmer, this is because of the current from the equatorial region and from the eastern margins which receives colder boreal currents and also experiences upwelling. The temperatures in higher latitudes range from approximately 3° to -1° C (that is 37° to 30° F).

In these tropic regions, small amounts of sunlight can penetrate deep as 600 m (2,000 feet). In the Bathyal waters, photosynthesis does not occur as the zone is being characterized as a dark zone except in the clear, virtually lifeless waters of the tropics. In this section, we will know about Bathyal Zone in detail. Both these limits are variable number, but the bathyal zone is normally described as a surface which lies between 200 and 2,000 m (that is 660 and 6,600 feet) below the surface area.

The Bathyal zone is the marine ecologic realm that extends down from the continental shelf to the depth where the water temperature is 4☌ (which is 39☏).

How do the creatures in the abyssal zone survive without sunlight