OMMIX: Food-Web structure and carbon budget in a coastal area off Central Chile (36°S): Influence of mixotrophy and omnivory

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
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Identification_Information:

Citation:

Citation_Information:

Originator: Unknown

Publication_Date: Unknown

Title: OMMIX: Food-Web structure and carbon budget in a coastal area off Central Chile (36°S): Influence of mixotrophy and omnivory

Description:

Abstract:

Classical and microbial pathways remain as a useful dichotomy for distinguishing the several fates of primary production in aquatic ecosystems. In most of our idealized concepts of food-web, we tend to separate profoundly between the photosynthetic and the heterotrophic organisms in the predatory food-web. This division is not necessarily adequate descriptions of reality since there are known organisms able to combine nutrition types, and complicate our traditional view about aquatic food-webs. One complicating factor that is receiving increasing attention is the influence of ‘mixotrophs’, organisms that defy traditional trophic concepts classification by both photosynthesizing and grazing. In addition, ‘omnivory’, the consumption of resources from more than one trophic level, is a widespread behavior among planktonic organisms. Evidences for shifting trophic roles of various types of planktonic organisms and multiple levels of feeding interactions within mixotrophs and omnivorous components, which typically have been regarded as a single trophic level have increased during the last decade. By using field and experimental approaches, we propose to elucidate the potential role of ‘mixotrophy’ and ‘omnivory’ to the carbon flows in a river-influenced and non-river influenced continental shelf off Central Chile. Primary production, bacterial production, autotrophic, heterotrophic and mixotrophic biomasses, as well as, measurements of grazing by nanoflagellates, microzooplankton, and mesozooplankton are conducted under contrasting conditions during sprig and winter. Ongoing food-web analysis of the spring condition during coastal upwelling events, and under the influence of the river discharge will be discussed, as well as, the implications of mixotrophy and omnivory in the structure and ecosystem functioning.

Purpose:

Not Available

Supplemental_Information:

Not Available

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20060301

Ending_Date: 20090331

Currentness_Reference:Unknown

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: Not Available

East_Bounding_Coordinate: Not Available

North_Bounding_Coordinate: Not Available

South_Bounding_Coordinate: Not Available

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: PROJECT

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > DISCHARGE/FLOW

Theme_Keyword: EARTH SCIENCE > OCEANS > COASTAL PROCESSES

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE SEDIMENTS > PARTICLE FLUX

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > BIOGEOCHEMICAL CYCLES

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ORGANIC MATTER

Theme_Keyword: EARTH SCIENCE > OCEANS > AQUATIC SCIENCES

Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS

Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > BACTERIA/ARCHAEA

Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > COASTAL HABITAT

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL

Theme_Keyword: IMBER > INTEGRATED MARINE BIOGEOCHEMISTRY AND ECOSYSTEM RESEARCH

Theme_Keyword: OCEANS

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN

Place_Keyword: CONTINENT > SOUTH AMERICA > CHILE

Access_Constraints: Not Available

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: CRISTIAN A. VARGAS

Contact_Position: INVESTIGATOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Environmental Sciences Center EULA Chile, Universidad de Concepción

City: Concepción

Postal_Code: P.O. Box 160-C

Country: Chile

Contact_Voice_Telephone: 056 41 2204032

Contact_Electronic_Mail_Address: crvargas@udec.cl

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: IMBER > International Marine Biogeochemistry and Ecosystem Research

Contact_Person: IMBER INTERNATIONAL PROJECT OFFICE

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Contact_Voice_Telephone: +33 (0)2-98-49-86-72

Contact_Facsimile_Telephone: +33 (0)2-98-49-86-09

Contact_Electronic_Mail_Address: imber@univ-brest.fr

Resource_Description: OMMIX

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Not Available

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.imber.info/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20110316

Metadata_Review_Date: 20110318

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GCMD User Support Office

Contact_Organization: NASA Global Change Master Directory

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Not Available

City: Lanham

State_or_Province: MD

Postal_Code: 20706

Country: USA

Contact_Voice_Telephone: Not Available

Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time