Featured Research

from universities, journals, and other organizations

Chemistry Of Fossil Plankton Shells Precise Indicator Of Depth Habitat

Date:
April 4, 2006
Source:
European Geosciences Union
Summary:
New geochemical techniques now make it possible to precisely determine the water depths at which plankton used to live. This opens new opportunities for palaeoceanographic research.

New geochemical techniques now make it possible to precisely determine the water depths at which plankton used to live. This opens new opportunities for palaeoceanographic research.

Marine geologists often use the fossil remains of calcareous marine zooplankton (planktic foraminifera) to obtain information on the past ocean. The chemistry of the tiny shells of these organisms provides important information on, for example, the ocean's temperature, density stratification, ice volume or may be used to reconstruct past changes in biological productivity or CO2. It is often assumed that species grow their calcite shells at a fixed level in the water column.

Using plankton tows, Iris Wilke (Geosciences Department, University of Bremen) and Frank Peeters (Vrije Universiteit, Amsterdam) have collected living planktic foraminifera at various locations in the Atlantic and Indian Oceans. Their results, presented on a poster at the EGU 2006, show that the shell geochemistry does not reflect a single depth level or a fixed temperature. They use an oxygen isotope mass-balance model to precisely quantify the depth habitat of ten species of modern planktic foraminifera which are frequently used in palaeo-oceanographic studies. The model fits to field data clearly indicate species-specific and species-characteristic depth integrated growth patterns.

Wilke and Peeters, show that some species grow their calcite at very shallow levels in the water column (i.e. within the surface mixed layer), while other species may continue to grow in water layers down to hundreds of metres below the sea surface, much deeper than previously assumed. Considering the chemisty of shells of different species that have grown over different parts of the water column, the authors suggest that their findings may be used to potentially unravel the density structure of the past water column and hence density driven circulation.


Story Source:

The above story is based on materials provided by European Geosciences Union. Note: Materials may be edited for content and length.


Cite This Page:

European Geosciences Union. "Chemistry Of Fossil Plankton Shells Precise Indicator Of Depth Habitat." ScienceDaily. ScienceDaily, 4 April 2006. <www.sciencedaily.com/releases/2006/04/060404200433.htm>.
European Geosciences Union. (2006, April 4). Chemistry Of Fossil Plankton Shells Precise Indicator Of Depth Habitat. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2006/04/060404200433.htm
European Geosciences Union. "Chemistry Of Fossil Plankton Shells Precise Indicator Of Depth Habitat." ScienceDaily. www.sciencedaily.com/releases/2006/04/060404200433.htm (accessed April 18, 2014).

Share This



More Plants & Animals News

Friday, April 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Vermont Goat Meat Gives Refugees Taste of Home

Vermont Goat Meat Gives Refugees Taste of Home

AP (Apr. 18, 2014) Dairy farmers and ethnic groups in Vermont are both benefiting from a unique collaborative effort that's feeding a growing need for fresh and affordable goat meat. (April 18) Video provided by AP
Powered by NewsLook.com
First Ever 'Female Penis' Discovered In Animal Kingdom

First Ever 'Female Penis' Discovered In Animal Kingdom

Newsy (Apr. 18, 2014) Not only are these newly discovered bugs' sex organs reversed, but they also mate for up to 70 hours. Video provided by Newsy
Powered by NewsLook.com
Little Progress Made In Fighting Food Poisoning, CDC Says

Little Progress Made In Fighting Food Poisoning, CDC Says

Newsy (Apr. 18, 2014) A new report shows rates of two foodborne infections increased in the U.S. in recent years, while salmonella actually dropped 9 percent. Video provided by Newsy
Powered by NewsLook.com
The Great British Farmland Boom

The Great British Farmland Boom

Reuters - Business Video Online (Apr. 17, 2014) Britain's troubled Co-operative Group is preparing to cash in on nearly 18,000 acres of farmland in one of the biggest UK land sales in decades. As Ivor Bennett reports, the market timing couldn't be better, with farmland prices soaring over 270 percent in the last 10 years. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins