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Global Change Master Directory (GCMD)
Evaluating the impact of upwelling and/or relaxation periods and of low dissolved oxygen regimes on the Concepcion shelf
Entry ID: GLOBEC_040_CHL_004


Summary
Abstract: Evaluating the impact of upwelling and/or relaxation periods and of
low dissolved oxygen regimes on the structure and functioning of the
benthic community on the Concepcion shelf

The marine environment off central Chile is an important site of
coastal upwelling subject to seasonal and episodic shifts in wind
strength. A moderate oxygen minimum and nutrient-rich layer,
associated with equatorial subsurface water (ESSW), are found at
intermediate depths with the upper boundary in the upwelling season
reaching to ~20m depth. More or less lasting and intense suboxic and
anoxic benthic conditions are created due to increased oxygen uptake
linked to the seasonal higher input of organic matter and to the
extended influence of hypoxic waters.

Changes in the composition of ESSW can also result from local and
remote physical forcing acting at different time- and space-scales.
When oxygen supply falls or demand rises over the benthos, important
changes can occur in the dominant metabolic pathways of microbial
processes, in sediment and water chemistry, on the nutrient flux
across the sediment-water interface, and in the structure and
functioning of benthic communities.

New and available data was evaluated to evaluate the impact of
upwelling and/or relaxation periods, and of low dissolved oxygen
regimes on the structure and functioning of the benthic community on
the Concepcion shelf.

Parent DIF
This description is a member of a collection. The collection is described in
GLOBEC_023_CHL_001


Geographic Coverage
 N: -15.72 S: -56.79  E: -64.9  W: -77.16

Data Set Citation
Version: Not provided


Temporal Coverage
Start Date: 1970-01-01


Location Keywords
OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN
CONTINENT > SOUTH AMERICA > CHILE


Science Keywords
OCEANS >OCEAN CHEMISTRY >OXYGEN    [Definition]
OCEANS >OCEAN CIRCULATION >FRESH WATER FLUX    [Definition]
OCEANS >OCEAN CIRCULATION >UPWELLING/DOWNWELLING    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >EL NINO SOUTHERN OSCILLATION (ENSO) >ENSO    [Definition]
BIOLOGICAL CLASSIFICATION >ANIMALS/INVERTEBRATES    [Definition]
BIOSPHERE >ECOSYSTEMS >MARINE ECOSYSTEMS >BENTHIC    [Definition]
BIOSPHERE >ECOSYSTEMS >MARINE ECOSYSTEMS >COASTAL    [Definition]
BIOSPHERE >ECOSYSTEMS >MARINE ECOSYSTEMS >PELAGIC    [Definition]
BIOSPHERE >ECOSYSTEMS >MARINE ECOSYSTEMS    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS >BIOMASS DYNAMICS    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS >OXYGEN DEMAND    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >COMMUNITY DYNAMICS >COMMUNITY STRUCTURE    [Definition]


Project
GLOBEC >Global Ocean Ecosystem Dynamics, IGBP    [Information]
IGBP >International Geosphere-Biosphere Programme    [Information]


Keywords
BENTHOS
CHILE
EL NINO
FONDAP-HUMBOLDT
FRESHWATER INPUT
GLOBEC
OXYGEN MINIMUM LAYER
THIOPLOCA
UPWELLING


Data Center
Estacion de Biologia Marina-Dichato, Universidad de Concepcion, Chile    [Information]
Data Center URL: http://www.udec.cl/carreras/bmarina.html

Data Center Personnel
Name: PROF. VICTOR A GALLARDO
Phone: +56 41 683247
Fax: +56 41 683902
Email: vgallar at udec.cl
Contact Address:
Fondap-Humboldt Program Office
Estacion de Biologia Marina-Dichato (EBMD)
Universidad de Concepcion
City: Concepcion
Country: Chile


Personnel
RUBEN ESCRIBANO
Role: INVESTIGATOR
Email: rescribano at uantof.cl
Contact Address:
University of Antofagasta
PO Box 170
City: Antofagasta
Country: Chile


GLOBEC IPO
Role: METADATA AUTHOR
Phone: +44 (0)1752 633401
Fax: +44 (0)1752 633101
Email: globec at pml.ac.uk
Contact Address:
GLOBEC International Project Office
Plymouth Marine Laboratory
Prospect Place
City: Plymouth
Postal Code: PL1 3DH
Country: UK


Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2001-08-08
Last DIF Revision Date: 2018-11-01



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