Name: Chlorophyll_a_b_c_Phaeophytin_a
Display Field: GA_Sample_ID
Type: Feature Layer
Geometry Type: esriGeometryPoint
Description: This data layer comprises chlorophyll a, b and c and phaeophytin a concentrations from the upper 2 cm of seabed sediments.
Bottom sediments were collected using either a Smith McIntyre grab or a Box Core. 0.4 ml samples of surface sediment (0-0.5 cm) were syringed into plastic bags. The samples were wrapped in Al foil and frozen. Chlorophyll concentrations were calculated on sediment extracts (90% acetone + 0.1% MgCO3) at spectrophometric readings at wavelengths of 647, 630, 750 and 664 nm. For chlorophyll-a (Chl-a) and phaeophytin-a, wavelengths of 664 nm and 750 nm (before and after the addition of 200 -L-1 0.1 mol L-1 HCl per 2 mL extractant) and the equation derived by Lorenzen (1967) were used. Chlorophyll b and c concentrations were calculated according to equations provided by Jeffrey and Welschmeyer (2003). The reproducibility of the measurements was +/-10%.
Lorenzen, C. J. (1967). Determination of chlorophyll and pheopigments: Spectrophotometric equations. Limnology and Oceanography 12, 343-346.
Jeffrey, S.W., and Welschmeyer, N.A. (2003). Spectrophotometric and fluorometric equations in common use in oceanography. In 'Phytoplankton pigments in oceanography: guidelines to modern methods' (Eds. S.W. Jeffrey and R.F.C. Mantoura, and S.W. Wright.) pp. 597-615. (UNESCO Paris.)
Definition Expression: N/A
Copyright Text: © Commonwealth of Australia (Geoscience Australia) 2016. This product is released under the Creative Commons Attribution 4.0 International Licence. http://creativecommons.org/licenses/by/4.0/legalcode
Default Visibility: true
MaxRecordCount: 1000
Supported Query Formats: JSON, AMF
Min Scale: 0
Max Scale: 0
Supports Advanced Queries: true
Supports Statistics: true
Has Labels: false
Can Modify Layer: false
Can Scale Symbols: false
Use Standardized Queries: true
Extent:
XMin: 126.91223300000001
YMin: -12.209479999999928
XMax: 127.453217
YMax: -11.39911666699993
Spatial Reference:
4326
(4326)
Drawing Info:
Renderer:
Simple Renderer:
Symbol:
Label: Chlorophyll a, b and c and Phaeophytin a
Description:
Transparency: 0
Labeling Info:
HasZ: false
HasM: false
Has Attachments: false
HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Type ID Field: null
Fields:
-
OBJECTID
(
type: esriFieldTypeOID
,
alias: OBJECTID
)
-
GA_Sample_number
(
type: esriFieldTypeDouble
,
alias: GA_Sample_number
)
-
GA_Sample_ID
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type: esriFieldTypeString
,
alias: GA_Sample_ID
,
length: 255
)
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Sample_type
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type: esriFieldTypeString
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alias: Sample_type
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length: 255
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Longitude
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type: esriFieldTypeDouble
,
alias: Longitude
)
-
Latitude
(
type: esriFieldTypeDouble
,
alias: Latitude
)
-
Water_depth__m_
(
type: esriFieldTypeDouble
,
alias: Water_depth__m_
)
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Acquire_date
(
type: esriFieldTypeString
,
alias: Acquire_date
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length: 255
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-
Sediment_depth__cm_
(
type: esriFieldTypeString
,
alias: Sediment_depth__cm_
,
length: 255
)
-
Chlor_a__ug_g___dwt___Lorenzen_
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type: esriFieldTypeString
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alias: Chlor_a__ug_g___dwt___Lorenzen_
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length: 255
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Chlor_b__ug_g_dry_wt_
(
type: esriFieldTypeDouble
,
alias: Chlor_b__ug_g_dry_wt_
)
-
Chlor_c__ug_g_dry_wt_
(
type: esriFieldTypeDouble
,
alias: Chlor_c__ug_g_dry_wt_
)
-
Pheophytin__ug_g_dwt___Lorenzen_
(
type: esriFieldTypeDouble
,
alias: Pheophytin__ug_g_dwt___Lorenzen_
)
-
Shape
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type: esriFieldTypeGeometry
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alias: Shape
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Supported Operations:
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