Dramatic long-term shift in Pacific ecosystem

Share via AddThis
Posted January 10, 2014
Mānoa: HURL enables discovery of dramatic long-term shift in Pacific ecosystem
Hawaiian gold coral was collected using HURL’s Pisces V submersible. Credit: HURL, M Cremer.
The Hawaii Undersea Research Laboratory (HURL) at the University of Hawaiʻi at Mānoa School of Ocean and Earth Science and Technology (SOEST) has enabled scientists to determine that a long-term shift in nitrogen content in the Pacific Ocean has occurred as a result of climate change.   Researchers from the Lawrence Livermore National Laboratory (LLNL) and the University of California – Santa Cruz analyzed deep-sea corals gathered near the Hawaiian Islands using the HURL Pisces V submersible. They observed overall nitrogen fixation in the North Pacific Ocean has increased by about 20 percent since the mid 1800s and this long-term change appears to be continuing today, according to a study published recently in the journal, Nature.

Using chemical information locked in organic skeletal layers, the team used these ancient deep corals as detailed recorders of changes at the base of the open Pacific food web over the last 1,000 years. This represents the first detailed biogeochemical records for the planet’s largest contiguous ecosystem. This type of sample is only available using deep-diving submersibles, such as those operated by HURL.

Read more at: Phys.org

48,907 science & technology articles


Our Articles (see all)

General News

Follow us

Facebook   Twitter   Pinterest   StumbleUpon   Plurk
Google+   Tumblr   Delicious   RSS   Newsletter via Email

Featured Video (see all)

In control skin from the hip (A) and normal-appearing skin from the abdomen (B), elastic fibers responsible

for skin elasticity are intact, forming an intricate mesh-like network. In stretch marks that have recently

formed during pregnancy (C), elastic fibers are lost and replaced by disorganized, thin fibrils, or “strands,”

that persist without forming a normal elastic network. The middle and bottom panels magnify the identified

areas of the top panels.
Stretch mark science: What happens to your skin when pregnancy gives you a stretch mark?
Don’t believe the hype when you see those creams and ointments promising to prevent or reduce pregnancy stretch…

Featured Image (see all)

Dione Before the Rings
Saturn’s rings are so expansive that they often sneak into Cassini’s pictures of other bodies. Here, they appear…