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

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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:
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Supplemental_Information:
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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
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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Logical_Consistency_Report:
Not Available
Completeness_Report:
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Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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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
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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
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