Something called out with an abyssal shrillness, startling Luke from his sleep.
A variety of general habitat types can be recognized within the Clarion-Clipperton Zone, including abyssal plains/abyssal hills, seamounts and fracture zones.
A very good example of this is the recently concluded Kaplan project, which was the first and most successful attempt to analyse the species composition and rates of gene flow of living organisms across the abyssal plains of the Clarion-Clipperton Fracture Zone in the Central Pacific Ocean.
Although samples are still under process, first results have also led to the conclusion that habitat diversity between nodules fields would sustain a higher biodiversity than surrounding abyssal plains.
Diversity in abyssal macrofauna in the Central Indian Ocean Basin was documented during the reporting period.
Given the vast size of the abyssal plains and continental slopes, the potential for larvae and juveniles and even adults, in the case of the smallest organisms, to drift over large distances is significant.
However, to assess the potential for extinction resulting from such activities requires information on the geographic range and distribution of individual abyssal species, which is very limited.
In particular, the flux of particulate organic carbon to the seafloor may influence nodule abundance and grade because sinking POC is a likely carrier of metals from the surface ocean to abyssal sediments.
In the Kaplan project, scientists used state-of-the-art molecular and morphological methods to evaluate biodiversity and geographic ranges of three key faunal groups in the abyssal Pacific nodule province: polychaete worms, nematode worms, and protozoan foraminifera.
It may be argued that exploitation of resources on the abyssal plains will not result in species extinctions because source populations of affected species would still exist on the continental margins.
relating to ocean depths from 2000 to 5000 meters
resembling an abyss in depth; so deep as to be unmeasurable: deep, unfathomable, abysmal