Search results
Results from the WOW.Com Content Network
A marine coastal ecosystem is a marine ecosystem which occurs where the land meets the ocean. Worldwide there is about 620,000 kilometres (390,000 mi) of coastline. Coastal habitats extend to the margins of the continental shelves, occupying about 7 percent of the ocean surface area.
Geocaching (/ ˈ dʒ iː oʊ k æ ʃ ɪ ŋ /, JEE-oh-KASH-ing) is an outdoor recreational activity, in which participants use a Global Positioning System (GPS) receiver or mobile device and other navigational techniques to hide and seek containers, called geocaches or caches, at specific locations marked by coordinates all over the world. [2]
Marine habitats can be divided into coastal and open ocean habitats. Coastal habitats are found in the area that extends from as far as the tide comes in on the shoreline out to the edge of the continental shelf. Most marine life is found in coastal habitats, even though the shelf area occupies only seven percent of the total ocean area.
Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming. These impact marine ecosystems and food webs and may result in consequences as yet unrecognised for the biodiversity and continuation of marine life forms.
From shallow waters to the deep sea, the open ocean to rivers and lakes, numerous terrestrial and marine species depend on the surface ecosystem and the organisms found there. [1] The ocean's surface acts like a skin between the atmosphere above and the water below, and hosts an ecosystem unique to this environment.
The Hawaiian and Mediterranean monk seals are considered to be one of the most endangered marine mammals on the planet, according to the NOAA. [31] The last sighting of the Caribbean monk seal was in 1952, and it has now been confirmed extinct by the NOAA. [33] [34] The vaquita porpoise, discovered in 1958, has become the most endangered marine ...
Phosphorus occurs most abundantly in nature as part of the orthophosphate ion (PO 4) 3−, consisting of a P atom and 4 oxygen atoms. On land most phosphorus is found in rocks and minerals. Phosphorus-rich deposits have generally formed in the ocean or from guano, and over time, geologic processes bring ocean sediments to land.
Established in 1970 by Hawaii Revised Statutes Chapter 195, the system presently consists of 19 reserves on five islands, encompassing more than 109,000 acres (440 km 2) of the State's ecosystems. The diverse areas found in the NARS range from marine and coastal environments to lava flows, tropical rainforests , and even an alpine desert .