CWT-LTER Data Set Summary

Accession: 4023 CWT Research Theme: Fish Ecology
Contributor: Catherine Pringle
Title: Direct and indirect effects of increased bedload on algal and detrital-based stream food webs at the Coweeta Hydrologic Laboratory from 1997 to 1999: Tile/ sediment addition experiment, Summer 1997; Chlorophyll, AFDM, inorganics (days 5-40)
Abstract: Anthropogenic sedimentation poses a significant threat to stream ecosystems throughout the world. Increases in bedload (sediment transported and deposited on the stream bottom) can be especially detrimental for benthic communities. To examine how increased bedload directly and indirectly affects stream communities, we simultaneously manipulated sediment and top-down effects of macroconsumers (fishes and crayfish) in situ in two factorial experiments, one using tiles and one using leaf packs as sampling substrates. Bedload was increased by adding small amounts of sediment (2.5 x normal levels) to localized areas (0.25 m2) of an otherwise unimpacted stream. This increase in bedload had direct effects on basal resources in both the tile and leaf pack experiments. In the tile experiment algal composition was altered by sediment addition, while in the leaf pack experiment fungal biomass declined with sediment.
Key Words: adnate abundance, adnate biovolume, AFDM, algae, bedload, chlorophyll a, Coweeta Hydrologic Laboratory, CWT, disturbance, food webs, fungal biomass, inorganic sediment, insect length, insects, LTER, macroconsumers, motile abundance, North Carolina, Otto, sedimentation, tiles, uneven sampling interval, University of Georgia
LTER Core Area: Disturbance Patterns
CWT Themes: Fish Ecology, Aquatic Macroinvetebrate Ecology
Study Type: Coweeta Aquatic Study
Study Period: 01-Jul-1997 to 30-Dec-1999
Site References:
BALLCRK -- Ball Creek, Macon County, North Carolina, USA
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Downloads: 

Data Table: 4023_chla_seds (Data table describing chlorophyll and AFDM data for data set 4023., 144)

Access: Public (released 01-Dec-2006)

Metadata: Text (ESA FLED), Basic EML, Complete EML

Data Formats: Spreadsheet CSV Text Format, EML-described Text Format, Tab-delimited Text Report with Statistical Summary, GCE Data Toolbox Format, Standard MATLAB Variables Format

Column List:

Column Name Units Type Description (hide)
1 Sample_ID none alphanumeric string Sample ID; "C" is control, "E" is exclusion, "S" is sediment addition treatments
2 Day DD integer Day
3 Chlorophyll_a mg/m^2 floating-point Chloropyll a; mg/m^2
4 AFDM g/m^2 floating-point AFDM; g/m^2
5 Inorganic_sediment_conc g/m^2 floating-point Inorganic sediment concentration; g/m^2

Data Table: 4023_leaves_bugs (Data table describing insects collected on tiles data for data set 4023., 193)

Access: Public (released 01-Dec-2006)

Metadata: Text (ESA FLED), Basic EML, Complete EML

Data Formats: Spreadsheet CSV Text Format, EML-described Text Format, Tab-delimited Text Report with Statistical Summary, GCE Data Toolbox Format, Standard MATLAB Variables Format

Column List:

Column Name Units Type Description (hide)
1 Taxon none alphanumeric string Taxon
2 Length mm floating-point Length; millimeters (mm); Insects were preserved in 70% ETOH, then identified and measured using a dissecting microscope and 1 mm grid paper.
3 Number_of_insects_AC1 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AC1)
4 Number_of_insects_AC2 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AC2)
5 Number_of_insects_AC3 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AC3)
6 Number_of_insects_AC4 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AC4)
7 Number_of_insects_AC5 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AC5)
8 Number_of_insects_AE1 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AE1)
9 Number_of_insects_AE2 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AE2)
10 Number_of_insects_AE3 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AE3)
11 Number_of_insects_AE4 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AE4)
12 Number_of_insects_AE5 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (AE5)
13 Number_of_insects_SC1 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SC1)
14 Number_of_insects_SC2 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SC2)
15 Number_of_insects_SC3 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SC3)
16 Number_of_insects_SC4 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SC4)
17 Number_of_insects_SC5 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SC5)
18 Number_of_insects_SE1 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SE1)
19 Number_of_insects_SE2 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SE2)
20 Number_of_insects_SE3 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SE3)
21 Number_of_insects_SE4 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SE4)
22 Number_of_insects_SE5 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 56 of the experiment. (SE5)

Data Table: 4023_leaves_decay (Data table describing leaf decay for data set 4023., 20)

Access: Public (released 01-Dec-2006)

Metadata: Text (ESA FLED), Basic EML, Complete EML

Data Formats: Spreadsheet CSV Text Format, EML-described Text Format, Tab-delimited Text Report with Statistical Summary, GCE Data Toolbox Format, Standard MATLAB Variables Format

Column List:

Column Name Units Type Description (hide)
1 Sample_ID none alphanumeric string Sample ID
2 AFDM_remaining g floating-point Total remaining AFDM; grams (g)
3 Fungal_biomass mg/DM/g^1 floating-point Fungal biomass; mg/DM/g^1 AFDM
4 Inorganic_sediment g/pack^1 floating-point Inorganic sediment concentration; g/pack^1

Data Table: 4023_tiles_algae (Data table describing algae samples for data set 4023., 18)

Access: Public (released 01-Dec-2006)

Metadata: Text (ESA FLED), Basic EML, Complete EML

Data Formats: Spreadsheet CSV Text Format, EML-described Text Format, Tab-delimited Text Report with Statistical Summary, GCE Data Toolbox Format, Standard MATLAB Variables Format

Column List:

Column Name Units Type Description (hide)
1 Sample_ID none alphanumeric string Sample ID
2 Chlorophyll_a mg/m^2 floating-point Amount of Chlorophyll a; mg/m^2
3 AFDM g/m^2 floating-point Ash-free dry mass (AFDM); g/m^2
4 Inorganic_sediment_concentration g/m^2 floating-point Inorganic sediment concentration per tile; g/m^2
5 Total_algal_abundance cells/cm^2 floating-point Total abundance of algae; # cells/cm^2
6 Total_algal_biovolume µm^3/cm^2 floating-point Total biovolume of algae; um^3/cm^2
7 Motile_taxa_abundance cells/cm^2 floating-point Abundance of motile taxa; # cells/cm^2
8 Motile_taxa_biovolume µm^3/cm^2 floating-point Biovolume of motile taxa; # um^3/cm^2
9 Adnate_taxa_abundance cells/cm^2 floating-point Abundance of adnate taxa; # cells/cm^2
10 Adnate_taxa_biovolume µm^3/cm^2 floating-point Biovolume of adnate taxa; # um^3/cm^2
11 Upright_taxa_abundance cells/cm^2 floating-point Abundance of upright taxa; # cells/cm^2
12 Upright_taxa_biovolume µm^3/cm^2 floating-point Biovolume of upright taxa; # um^3/cm^2

Data Table: 4023_tiles_bugs (Data table describing number of insects on tiles for data set 4023., 67)

Access: Public (released 01-Dec-2006)

Metadata: Text (ESA FLED), Basic EML, Complete EML

Data Formats: Spreadsheet CSV Text Format, EML-described Text Format, Tab-delimited Text Report with Statistical Summary, GCE Data Toolbox Format, Standard MATLAB Variables Format

Column List:

Column Name Units Type Description (hide)
1 Taxon none alphanumeric string Taxon
2 Length mm floating-point Length; millimeters (mm); Note: Insects were live-picked, then identified and measured using a dissecting microscope and 1 mm grid paper.
3 Number_of_insects_AC1 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
4 Number_of_insects_AC2 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
5 Number_of_insects_AC3 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
6 Number_of_insects_AC4 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
7 Number_of_insects_AC5 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
8 Number_of_insects_AE1 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
9 Number_of_insects_AE2 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
10 Number_of_insects_AE3 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
11 Number_of_insects_AE4 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
12 Number_of_insects_AE5 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
13 Number_of_insects_SC1 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
14 Number_of_insects_SC2 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
15 Number_of_insects_SC3 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
16 Number_of_insects_SC4 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
17 Number_of_insects_SC5 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
18 Number_of_insects_SE1 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
19 Number_of_insects_SE2 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
20 Number_of_insects_SE3 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
21 Number_of_insects_SE4 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.
22 Number_of_insects_SE5 count integer Number of insects collected on tiles (area = 112.5 cm^2) on day 40 of the experiment.