CWT-LTER Data Set Summary

Accession: 4024 CWT Research Theme: Aquatic Macroinvetebrate Ecology
Contributors: Catherine Pringle, Judy Meyer, ,
Title: Top-down interactions in streams draining human-modified landscapes at the Coweeta Hydrologic Laboratory from 1997 to 1998: Gradient algae data
Abstract: Spatial and temporal variability of consumer-controlled forces have been the subject of much debate in ecology. To date, most studies considering variability of these top-down interactions have focused on systems minimally impacted by human activities. However, human modification of the landscape is prevalent, and it can significantly affect the strength and outcome of species interactions. The objective of this study was to examine how top-down interactions vary among streams with differing amounts of human disturbance in their watersheds. To address this issue, we experimentally excluded macroconsumers (fishes and crayfishes) from benthic areas of five southern Appalachian streams. These sites represented a range of human watershed development, from 100% to < 50% forested; macroconsumer assemblages at low development sites were dominated by benthic insectivores (Cottus bairdi) and crayfishes, whereas algivores (Campostoma anomalum) and general insectivores (e.g., Notropis leuciodus) were common at more developed sites. Using ceramic tiles as sampling substrates, we compared sediment, algal assemblages (chlorophyll a, AFDM, abundance, biovolume, and composition), and insect assemblages (abundance, biomass, and composition) in macroconsumer exclusion and control areas.
Key Words: abundance, algae, aquatic invertebrate ecology, biovolume, Coweeta Hydrologic Laboratory, Coweeta LTER, crayfishes, CWT, fishes, human disturbance, LTER, LTER funding, macroconsumers, North Carolina, Otto, top-down interactions, uneven sampling interval, University of Georgia, water quality and water quantity, watershed development
LTER Core Area: Disturbance Patterns
CWT Themes: Aquatic Macroinvetebrate Ecology, Population and System Dynamics, Population Ecology
Study Type: Coweeta Aquatic Study
Study Period: 01-Jul-1997 to 30-Aug-1998
Site References:
BALLCRK -- Ball Creek, Macon County, North Carolina, USA
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Data Table: 4024_gradient_algae (Data table containing gradient algae data for data set 4024., 63)

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 none alphanumeric string Sample ID
2 Day DD integer Day
3 Abundance_total_algae cells/cm^2 floating-point total abundance of algae; cm^2
4 Biovolume_total_algae µm^3/cm^2 floating-point Total biovolume of algae; um^3/cm^2
5 Abundance_motile_taxa cells/cm^2 floating-point Abundance of motile taxa; # cells/cm^2
6 Biovolume_motile_taxa µm^3/cm^2 floating-point Biovolume of motile taxa; # um^3/cm^2
7 Abundance_adnate_taxa cells/cm^2 floating-point Abundance of adnate taxa; # cells/cm^2
8 Biovolume_adnate_taxa µm^3/cm^2 floating-point Biovolume of adnate taxa; # um^3/cm^2
9 Abundance_upright_taxa cells/cm^2 floating-point Abundance of adnate taxa; # cells/cm^2
10 Biovolume_upright_taxa µm^3/cm^2 floating-point Biovolume of upright taxa; # um^3/cm^2

Data Table: 4024_gradient_bugs (Data table containing gradient bugs data for data set 4024., 188)

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)
3 Num_of_bugs_BC1 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
4 Num_of_bugs_BC2 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
5 Num_of_bugs_BC3 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
6 Num_of_bugs_BC4 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
7 Num_of_bugs_BC5 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
8 Num_of_bugs_BE1 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
9 Num_of_bugs_BE2 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
10 Num_of_bugs_BE3 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
11 Num_of_bugs_BE4 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
12 Num_of_bugs_BE5 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
13 Num_of_bugs_DC1 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
14 Num_of_bugs_DC3 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
15 Num_of_bugs_DC4 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
16 Num_of_bugs_DC5 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
17 Num_of_bugs_DE1 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
18 Num_of_bugs_DE2 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
19 Num_of_bugs_DE3 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
20 Num_of_bugs_DE4 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
21 Num_of_bugs_DE5 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
22 Num_of_bugs_JC1_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; day 15
23 Num_of_bugs_JC2_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; day 15
24 Num_of_bugs_JC3_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile
25 Num_of_bugs_JC4_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile
26 Num_of_bugs_JC5_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile
27 Num_of_bugs_JE1_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile
28 Num_of_bugs_JE2_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile
29 Num_of_bugs_JE3_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile
30 Num_of_bugs_JE4_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile
31 Num_of_bugs_JE5_day_15 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile
32 Num_of_bugs_JC1 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
33 Num_of_bugs_JC2 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
34 Num_of_bugs_JC3 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
35 Num_of_bugs_JC4 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
36 Num_of_bugs_JC5 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
37 Num_of_bugs_JE1 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
38 Num_of_bugs_JE2 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
39 Num_of_bugs_JE3 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
40 Num_of_bugs_JE4 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
41 Num_of_bugs_JE5 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
42 Num_of_bugs_VC1 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
43 Num_of_bugs_VC2 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
44 Num_of_bugs_VC3 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
45 Num_of_bugs_VC4 count integer The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
46 Num_of_bugs_VE1 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
47 Num_of_bugs_VE2 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
48 Num_of_bugs_VE3 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
49 Num_of_bugs_VE4 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
50 Num_of_bugs_SC1_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
51 Num_of_bugs_SC2_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
52 Num_of_bugs_SC3_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
53 Num_of_bugs_SC4_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
54 Num_of_bugs_SC5_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
55 Num_of_bugs_SE1_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
56 Num_of_bugs_SE2_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
57 Num_of_bugs_SE3_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
58 Num_of_bugs_SE4_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
59 Num_of_bugs_SE5_day_35 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 35.
60 Num_of_bugs_SC1 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
61 Num_of_bugs_SC2 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
62 Num_of_bugs_SC3 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
63 Num_of_bugs_SC4 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
64 Num_of_bugs_SC5 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
65 Num_of_bugs_SE1 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
66 Num_of_bugs_SE2 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
67 Num_of_bugs_SE3 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
68 Num_of_bugs_SE4 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.
69 Num_of_bugs_SE5 count floating-point The number of bugs of a given taxon and size collected on tile [112.5 cm^2 area]; # per tile; values are for day 40.

Data Table: 4024_gradient_chloro (Data table containing chlorophyll data for data set 4024., 287)

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 none alphanumeric string Sample ID
2 Day DD integer Day
3 Chlorophyll_a mg/m^2 floating-point amount of Chlorophyll a; mg/m^2
4 Ash_free_dry_mass_AFDM g/m^2 floating-point Ash Free Dry Mass (AFDM); g/m^2
5 Inorganic_sediment g/m^2 floating-point Inorganic sediment concentration per tile; g/m^2
6 Total_sediment g/m^2 floating-point Total sediment concentration per tile; g/m^2