Sehr interessantes Video von einer Tauchfahrt vor Roatan, Honduras:
Narrated 4K-HD video of a submarine dive off Half Moon Bay, Roatan, Honduras, to 2000 ft. in the Caribbean Sea. This vertical transect from the deep sea thro...
… video submarine vertical transect that goes from 610 m (2000 ft) to the surface off NW Roatan Island, Honduras, Caribbean Sea.
https://youtu.be/4F3XQeWs4V8
Some will find this footage interesting because:
(1) Benthic cover is very low below the middle of the mesophotic zone, and below the mesophotic zone, there is mostly clean substratum and deep sea fauna (glass sponges, crinoids, etc).
(2) Sponge cover increases with seaweed cover, congruent with the "vicious circle" hypothesis that DOC from seaweeds may be linked to Caribbean sponge nutrition - for more on that, see:
http://people.uncw.edu/pawlikj/2016BioSciencePawlik.pdf (
3) A lionfish is the first "shallow-water" fish species seen as the sub climbs, at about 500 ft (150 m) - clearly, this species is "here to stay" in the Caribbean.
(4) The sub tracks over the dive gear of a suicidal diver from 30 years ago at 130 m - there is very little fouling the BCD and tank, showing the slow recruitment at this depth.
Author:
Joseph R. Pawlik, Professor, Dept. of Biology and Marine Biology UNCW Center for Marine Science 5600 Marvin K Moss Lane Wilmington, NC 28409 Office:(910)962-2377; Cell:(910)232-3579 Website:
http://people.uncw.edu/pawlikj/index.html PDFs:
http://people.uncw.edu/pawlikj/pubs2.html Video Channel:
https://www.youtube.com/user/skndiver011
Posts
