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LBA-ECO LC-07 Aquatic Macrophyte Biomass, Monte Alegre Lake, Para, Brazil: 2003-2004
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Revision date: September 17, 2012

Summary:

This data set reports measurements of aquatic macrophyte biomass, phenology, leaf characteristics, and length and diameter of stems of both submerged and unsubmerged macrophytes. Data were collected from sites in the Monte Alegre Lake region on the eastern Amazon River floodplain in Para, Brazil. Ten field surveys were made at approximately monthly intervals from December 2003 to November 2004. There is one comma-delimited data file with this data set.

site map

Figure 1. General region of macrophyte productivity studies in the Amazon River floodplain and expanded view of Monte Alegre Lake showing seven of the sampling sites. Shaded circles represent the maximum radius covered by sampling points at each location. From Silva et al., 2009.

Data Citation:

Cite this data set as follows:

Silva, T.S.F., D. Silva, M.P.F. Costa, and J.M. Melack. 2012. LBA-ECO LC-07 Aquatic Macrophyte Biomass, Monte Alegre Lake, Para, Brazil: 2003-2004. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/1127

Implementation of the LBA Data and Publication Policy by Data Users:

The LBA Data and Publication Policy [http://daac.ornl.gov/LBA/lba_data_policy.html] is in effect for a period of five (5) years from the date of archiving and should be followed by data users who have obtained LBA data sets from the ORNL DAAC. Users who download LBA data in the five years after data have been archived must contact the investigators who collected the data, per provisions 6 and 7 in the Policy.

This data set was archived in September of 2012. Users who download the data between September 2012 and August 2017 must comply with the LBA Data and Publication Policy.

Data users should use the Investigator contact information in this document to communicate with the data provider. Alternatively, the LBA website [http://lba.inpa.gov.br/lba/] in Brazil will have current contact information.

Data users should use the Data Set Citation and other applicable references provided in this document to acknowledge use of the data.

Table of Contents:

1. Data Set Overview:

Project: LBA (Large-Scale Biosphere-Atmosphere Experiment in the Amazon)

Activity: LBA-ECO

LBA Science Component: Land Use and Land Cover

Team ID: LC-07 (Melack / Novo / Forsberg)

The investigators were Forsberg, Bruce R; Melack, John M.; Novo, Evlyn ; Affonso, Adriana Gomes; Albuquerque, Paulo C Gurgel; Alcantara, Enner Herenio; Alsdorf, Douglas; Arruda, Warey de Costa; Barbosa, Claudio; Belger, Lauren; Carvalho, Joao Carlos; Castellari, Sueli Pissarra; Correa, Denival Silva; Correia, Antonio ; Costa, Maycira ; da Costa Freitas, Corina; Dutra, Luciano Vieira; Elmiro, Marcos Timbo; Filho, Waterloo Pereira; Franca, Andreia Maria Silva; Freitas, Ramon Morais; Frickmann, Fernando Cruz ; Gama, Fabio Furlan; Gastil-Buhl, Mary; Goncalves, Fabio Guimaraes; Hess, Laura Lorraine; Jardim-Lima, Dayson Jose; Kemenes, Alexandre ; Kilham, Nina; Kramer, Marc Gerald; Lima, Ivan Bergier Tavares de; Londe, Luciana de Resende; Marshall, Bruce Gavin; Mertes, Leal  Mura, Jose Claudio; Rudorff, Conrado de Moraes; Sant'Anna, Sidnei J.S.; Santos, Claudia Cristina dos; Santos, Joao Roberto dos; Shimabukuro, Yosio Edemir; Silva, Claudio Roberto; Silva, Thiago Sanna Freire; Titoneli, Fernanda and Vasconcelos, Cintia Honorio. You may contact Silva, Thiago Sanna Freire (thiago@dsr.inpe.br).

LBA Data Set Inventory ID: LC07_Biomass_LGrande

This data set reports measurements of aquatic macrophyte biomass, phenology, leaf characteristics, and length and diameter of stems of both submerged and unsubmerged macrophytes. Data were collected from sites in the Monte Alegre Lake region on the eastern Amazon River floodplain in Para, Brazil. Ten field surveys were made at approximately monthly intervals from December 2003 to November 2004.

2. Data Characteristics:

Data are presented in one ASCII comma separated file:

Biomass_Lago_Grande.csv

ColumnHeadingUnits/formatDescription
1Sample_ID Sample Name (SITE_SAMPLE_SUBSAMPLE). Sites are Arapari (ARA); Curuai (C); Lago Grande (G). Only Lago Grande was sampled continuously on all 10 missions. Eg: C11.1 is Curuai site, sample 11, subsample 1
2Mission Field mission number (from 1 to 10)
3Latitudedecimal degreesLatitude in decimal degrees
4Longitudedecimal degreesLongitude in decimal degrees
5Dom_spp Dominant species (see Table 1)
6Dom_spp2 Second most common species (see Table 1)
7Sample_type Type of sample: 1 - observation (presence/description, no biomass); 2 - Partial Sample (10% of individuals; minimum of 9; sampled for biomass); 3 - Complete Sample (all individuals sampled for biomass)
8DateYYYYMMDDSample collection date
9TimeHH:MMSample collection time in local time (local time is UTC-3)
10Water_depthcmWater depth at sampling point reported in centimeters
11Stem_densityind/m2Number of individuals per square meter
12N_rammets Number of secondary individuals (rammets); if registered separately by collector
13Dev_stage Development Stage (1 = growing; 2 = mature; 3 = Flowering; 4 = Fructifying; 5 = Senescence/Partially Dry; 6 = Sprouting; 0 = Dead/Completely Dry)
14Stem_length_emergcmEmergent stem length in centimeters
15Stem_dia_emergcmEmergent stem diameter in centimeters
16Stem_incl_emerg degreesEmergent stem inclination (degrees: 0 = vertical/nadir; 90 = horizontal)
17Stem_nodes_emerg Number of emergent stem nodes
18N_leaves Average number of leaves per individual
19Width_leafcmAverage leaf width reported in centimeters
20Length_leafcmAverage leaf length reported in centimeters
21Incl_leaf degreesLeaf inclination (degrees: 0 = vertical/nadir; 90 = horizontal)
22N_samples_emerg Number of emergent stems sampled for biomass (sum of triplicate samples)
23Stem_length_submergcmSubmerged stem length in centimeters
24Stem_dia_submergcmSubmerged stem diameter in centimeters
25Stem_nodes_submerg Number of submerged stem nodes
26Root_presence Presence of attached roots (1 = present in one of the triplicates; 2 = present in 2 of the triplicates; 3 = present in 3 of the triplicates)
27N_samples_submerg Number of submerged stems sampled for biomass (sum of triplicate samples)
28Biomass_fresh_emerg_indg/indEmergent fresh biomass in grams per individual
29Biomass_dry_emerg_indg/ind Emergent dry biomass in grams per individual
30Biomass_fresh_submerg_indg/ind Submerged fresh biomass in grams per individual
31Biomass_dry_submerg_indg/ind Submerged dry biomass in grams per individual
32Biomass_fresh_emerg_areag/m2 Emergent fresh biomass in grams per square meter calculated as mean mass per individual multiplied by stem density
33Biomass_dry_emerg_areag/m2 Emergent dry biomass in grams per square meter calculated as mean mass per individual multiplied by stem density
34Biomass_fresh_submerg_areag/m2 Submerged fresh biomass in grams per square meter calculated as mean mass per individual multiplied by stem density
35Biomass_dry_submerg_areag/m2 Submerged dry biomass in grams per square meter calculated as mean mass per individual multiplied by stem density
36Biomass_fresh_emerg_quadg/m2 Emergent fresh biomass: for complete samples total fresh biomass in grams per square meter calculated as total measured biomass in quadrant divided by area of the quadrant
37Biomass_dry_emerg_quadg/m2 Emergent dry biomass: for complete samples total dry biomass in grams per square meter calculated as total measured biomass in quadrant divided by area of the quadrant
38Biomass_fresh_submerg_quad g/m2Submerged fresh biomass: for complete samples total fresh biomass in grams per square meter calculated as total measured biomass in quadrant divided by area of the quadrant
39Biomass_dry_submerg_quadg/m2 Submerged dry biomass: for complete samples total dry biomass in grams per square meter: calculated as total measured biomass in quadrant divided by area of the quadrant
40Total_stem_lengthcmTotal stem length calculated as Col 14 plus Col 23 reported in centimeters
41Total_biomass_fresh_area g/m2Total fresh biomass in grams per square meter calculated as Col 32 plu Col 34
42Total_biomass_fresh_ind g/indTotal fresh biomass in grams per individual calculated as Col 28 plus Col 30
43Total_biomass_fresh_quad g/m2Total observed fresh biomass in grams per square meter calculated as Col 36 plus Col 38
44Total_biomass_dry_area g/m2Total dry biomass in grams per square meter calculated as Col 33 plus Col 35
45Total_biomass_dry_ind g/indTotal dry biomass in grams per individual calculated as Col 29 plus Col 31
46Total_biomass_dry_quad g/m2Total observed dry biomass in grams per square meter calculated as Col 37 plus Col 39
47Mean_stem_diam_totalcmMean stem diameter for all stems reported in centimeters calculated as the average of Col 15 and Col 24
48Nodes_total Total number of nodes calculated as the sum of Col 17 and Col 25
 
missing data are indicated by -9999


Example data records:

Sample_ID,Mission,Latitude,Longitude,Dom_spp,Dom_spp2,Sample_type,Date,Time,
Water_depth,Stem_density,N_rammets,Dev_stage,Stem_length_emerg,Stem_dia_emerg,Stem_incl_emerg,
Stem_nodes_emerg,N_leaves,Width_leaf,Length_leaf,Incl_leaf,N_samples_emerg,Stem_length_submerg,
Stem_dia_submerg,Stem_nodes_submerg,Root_presence,N_samples_submerg,Biomass_fresh_emerg_ind,
Biomass_dry_emerg_ind,Biomass_fresh_submerg_ind,Biomass_dry_submerg_ind,Biomass_fresh_emerg_area,
Biomass_dry_emerg_area,Biomass_fresh_submerg_area,Biomass_dry_submerg_area,Biomass_fresh_emerg_quad,
Biomass_dry_emerg_quad,Biomass_fresh_submerg_quad,Biomass_dry_submerg_quad,Total_stem_length,
Total_biomass_fresh_area,Total_biomass_fresh_ind ,Total_biomass_fresh_quad,Total_biomass_dry_area,Total_biomass_dry_ind, Total_biomass_dry_quad,Mean_stem_diam_total,Nodes_total

ARA10.1,1,-2.407360077,-54.65909958,8,-9999,1,20031218,-9999,
-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999
 ARA10.2,1,-2.409640074,-54.65719986,4,-9999,2,20031218,-9999,
0,108,-9999,1, 106.7,0.7,-9999,6,-9999,
-9999,-9999,-9999,27,0,0,0,3,-9999,
-9999,7.8,-9999,0,-9999,840.8,-9999,
0,-9999,-9999,-9999,0,106.7,-9999,-9999,
-9999,840.8,7.8,-9999,0.4,6
ARA12.1,1,-2.407860041,-54.65840149,-9999,-9999,2,20031218,-9999,
10,541,-9999,6,15,-9999,-9999,-9999,2.7,
-9999,-9999,-9999,12,8.3,0.5,1.3,3,
12,-9999,0.1,-9999,0.3,-9999,64.9,-9999,
161.6,-9999,-9999,-9999,-9999,23.3,-9999,-9999,
-9999,226.4,0.4,-9999,-9999,-9999
C1.1,1,-2.169420004,-55.58169937,-9999,-9999,1,20031219,-9999,
-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999,-9999,-9999,-9999,
-9999,-9999,-9999

Table 1. Species Codes

Species codeSpecies nameCommon Name
0 Bare Ground Bare Ground
1 Paspalum fasciculatum Muri
2 Eichornia sp Moreru
3 Paspalum repens Premembeca
4 Hymenachne amplexicaulis Rabo de Rato
5 Ambrosia armtemisifolia Artemísia
7 Oryza perennis Arroz Bravo (Pripomonga)
8 Echinochloa polystachya Canarana
9 Mimosa sp. Juquiri
10 Stachytarpheta cayenensis Rinchão
12 Cyperus sp. Priprioca
13 Urena lobata Malva
14 Open Water Open Water
15 Scoparia dulcis Vassourinha
16 Hibiscus bifurcatus Manjorana

Site boundaries: (All latitude and longitude given in decimal degrees)

Site (Region) Westernmost Longitude Easternmost Longitude Northernmost Latitude Southernmost Latitude Geodetic Datum
Para Western (Santarem) - Lago Grande de Monte Alegre (Para Western
(Santarem))
-54.84258 -53.95092 -1.99914 -2.68247World Geodetic System, 1984 (WGS-84)

Time period:

Platform/Sensor/Parameters measured include:

3. Data Application and Derivation:

These repeated measures of vegetation biomass can be used to calculated net primary production for individual species and regions as well as overall for the study area.

4. Quality Assessment:

Biomass samples were taken using a destructive method that is limited by the size of the plants and the depth of the water column, limiting accurate sampling of submerged biomass. Therefore, it is expected that submerged biomass measurements will have a higher degree of inaccuracy, and an underestimation bias. Furthermore, plant material was stored during fieldwork, and posteriorly taken for drying and weighing. The storage and transfer processes might have incurred in small material loss between collection time and dry biomass weight determination. Given the above, we estimate the detection limit as approximately 10 grams in dry weight.

5. Data Acquisition Materials and Methods:

Study area:

The sampling sites were established at the Monte Alegre Lake region, Amazon River. Macrophyte communities in the region are mostly composed of emergent C3 and C4 grasses, with floating genera commonly observed as secondary species, interspersed with the dominant vegetation. Submerged species are rare due to turbidity but occur occasionally in places with clear water input. Most communities develop in regions of variable water level, between the upland and the permanently flooded areas, and have rapid growth at the beginning of the flooding phase.

Field Sampling:

Ten field surveys were conducted during the period of December 2003 to November 2004, at the best possible interval rate within the existing logistical constraints. The data collection design was established to also accommodate ground truthing for satellite imagery analysis in the region. The sampling design was stratified, with seven main sample sites, chosen for the known occurrence of macrophytes. Within each of these sites, one or more sampling transects were determined based on the extent and shape of the stands, reaching up to 100 m into the stand, perpendicular to the shoreline. Five to ten sampling points were visually distributed along the transect(s).

Within each sampling point, triplicate measurements were done by randomly placing a 50 x 50 cm aluminum quadrat in the immediate vicinity of the point. Data from the plants inside the quadrat were recorded separately for each triplicate, and then aggregated by averaging the triplicate observations, yielding one set of observations per geographic location. Data in this spreadsheet correspond to the aggregated measurements of each triplicate sample.

Three types of sample were established for data collection, in order to optimize sampling effort and maximize the number of samples:

Biomass and phenometric determination

Biomass samples were washed from debris and manually compressed prior to sample storage. Samples were later oven-dried (80 degrees C) to constant weight in a laboratory to determine dry biomass, to the nearest 0.1 g. For CS samples, the ten percent fraction and the remaining individuals were weighed separately.

Water depth and phenometric plant variables were recorded for each quadrat, for both CS and PS samples. For the phenometric data, at least three random individuals were measured for each triplicate, and the average was recorded.

6. Data Access:

This data is available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).

Data Archive Center:

Contact for Data Center Access Information:
E-mail: uso@daac.ornl.gov
Telephone: +1 (865) 241-3952

References

none cited

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