CWT-LTER Data Set Summary

Accession: 4022 CWT Research Theme: Ecosystem Ecology
Contributors: Catherine Pringle, Judy Meyer, , ,
Title: The importance of crayfish in the breakdown of rhododendron leaf litter at the Coweeta Hydrologic Laboratory in 1999
Abstract: Rhododendron (Rhododendron maximum) is a common evergreen shrub in riparian areas of the southern Appalachians, where its leaves can comprise a large proportion of leaf litter in streams. However, they are relatively refractory and generally considered a low quality food resource for detritivores. Our objective was to assess whether macroconsumers (primarily crayfish (Cambarus bartonii)) influence rhododendron leaf breakdown in a forested southern Appalachian stream in both summer (when leaves other than rhododendron are relatively scarce) and autumn (when other leaves are relatively abundant). We conducted two leaf decay experiments, one in summer and one in autumn, using pre-conditioned leaves. Macroconsumers were excluded from the benthos of a fourth-order stream using electric fences; we predicted that excluding macroconsumers would reduce the decay rate of rhododendron leaves in both summer and autumn.
Key Words: AFDM, biomass, breakdown rates, Coweeta Hydrologic Laboratory, Coweeta LTER, crayfish, CWT, ecosystem ecology, ecosystem function, fungal biomass, fungi, insect biomass, insects, leaf breakdown, leaf decay, leaf weights, LTER, macroconsumers, North Carolina, Otto, uneven sampling interval, University of Georgia
LTER Core Area: Disturbance Patterns
CWT Themes: Ecosystem Ecology, Aquatic Invertebrate Ecology
Study Type: Coweeta Aquatic Study
Study Period: 01-Jul-1999 to 30-Nov-1999
Site References:
BALLCRK -- Ball Creek, Macon County, North Carolina, USA
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Downloads: 

Data Table: 4022_autumn_insects (Data table describing autumn insects data for data set 4022., 93)

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 Taxa none alphanumeric string Taxa (Peltoperlidae, Taeniopteryx, Lepidostoma, Leptotarsus, Pteronarcys, Capniidae, Limnephilidae, Nemouridae, Elmidae, Ceratopogonidae, Tanypodinae, Rhyacophila, Empididae, Dicranota, Perlidae, Perlodidae, Atherix, or Hemiptera)
2 Length mm floating-point Length; millimeters (mm); Note: Insects were identified and measured with a dissecting microscope and 1 mm grid paper.
3 Num_insects_day_20_FC1 count integer Number of insects colonizing day 20 (FC1 d20)
4 Num_insects_day_35_FC1 count integer Number of insects colonizing day 35 (FC1 d35)
5 Num_insects_day_56_FC1 count integer Number of insects colonizing day 56 (FC1 d56)
6 Num_of_insects_day_20_FC2 count integer Number of insects colonizing day 20 (FC2 d20)
7 Num_insects_day_35_FC2 count integer Number of insects colonizing day 35 (FC2 d35)
8 Num_insects_day_56_FC2 count integer Number of insects colonizing day 56 (FC2 d56)
9 Num_insects_day_20_FC3 count integer Number of insects colonizing day 20 (FC3 d20)
10 Num_insects_day_35_FC3 count integer Number of insects colonizing day 35 (FC3 d35)
11 Num_insects_day_56_FC3 count integer Number of insects colonizing day 56 (FC3 d56)
12 Num_insects_day_20_FC5 count integer Number of insects colonizing day 20 (FC5 d20)
13 Num_insects_day_35_FC5 count integer Number of insects colonizing day 35 (FC5 d35)
14 Num_insects_day_56_FC5 count integer Number of insects colonizing day 56 (FC5 d56)
15 Num_insects_day_20_FE1 count integer Number of insects colonizing day 20 (FE1 d20)
16 Num_insects_day_35_FE1 count integer Number of insects colonizing day 35 (FE1 d35)
17 Num_insects_day_56_FE1 count integer Number of insects colonizing day 56 (FE1 d56)
18 Num_insects_day_20_FE2 count integer Number of insects colonizing day 20 (FE2 d20)
19 Num_insects_day_35_FE2 count integer Number of insects colonizing day 35 (FE2 d35)
20 Num_insects_day_56_FE2 count integer Number of insects colonizing day 56 (FE2 d56)
21 Num_insects_day_20_FE3 count integer Number of insects colonizing day 20 (FE3 d20)
22 Num_insects_day_35_FE3 count integer Number of insects colonizing day 35 (FE3 d35)
23 Num_insects_day_56_FE3 count integer Number of insects colonizing day 56 (FE3 d56)
24 Num_insects_day_20_FE5 count integer Number of insects colonizing day 20 (FE5 d20)
25 Num_insects_day_35_FE5 count integer Number of insects colonizing day 35 (FE5 d35)
26 Num_insects_day_56_FE5 count integer Number of insects colonizing day 56 (FE5 d56)

Data Table: 4022_decay_fungi (Data table describing fungi decay data in data set 4022., 97)

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 Month MM integer Month
2 Day DD integer Day
3 Year YYYY integer Year
4 Days_since_study_began none integer Day
5 Sample_ID none alphanumeric string Sample ID
6 AFDM_remaining g floating-point Ash-free dry mass (AFDM) of leaf pack remaining, determined by drying (at 70 C) and ashing (at 500 C) leaf packs; grams (g)
7 Fungal_biomass mg/g^1 floating-point Fungal biomass measured via ergosterol extraction; (mg/g^1 AFDM)

Data Table: 4022_summer_insects (Data table describing summer insects data for data set 4022., 120)

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 Taxa none alphanumeric string Taxa
2 Length mm floating-point Length; millimeters (mm); Note: Insects were identified and measured with a dissecting microscope and 1 mm grid paper.
3 Num_insects_day_20_SC1 count integer Number of insects colonizing day 20 (SC1 d20)
4 Num_insects_day_32_SC1 count integer Number of insects colonizing day 32 (SC1 d32)
5 Num_insects_day_44_SC1 count integer Number of insects colonizing day 44 (SC1 d44)
6 Num_insects_day_20_SC2 count integer Number of insects colonizing day 20 (SC2 d20)
7 Num_insects_day_32_SC2 count integer Number of insects colonizing day 32 (SC2 d32)
8 Num_insects_day_44_SC2 count integer Number of insects colonizing day 44 (SC2 d44)
9 Num_insects_day_20_SC3 count integer Number of insects colonizing day 20 (SC3 d20)
10 Num_insects_day_32_SC3 count integer Number of insects colonizing day 32 (SC3 d32)
11 Num_insects_day_44_SC3 count integer Number of insects colonizing day 44 (SC3 d44)
12 Num_insects_day_20_SC4 count integer Number of insects colonizing day 20 (SC4 d20)
13 Num_insects_day_32_SC4 count integer Number of insects colonizing day 32 (SC4 d32)
14 Num_insects_day_44_SC4 count integer Number of insects colonizing day 44 (SC4 d44)
15 Num_insects_day_20_SC5 count integer Number of insects colonizing day 20 (SC5 d20)
16 Num_insects_day_32_SC5 count integer Number of insects colonizing day 32 (SC5 d32)
17 Num_insects_day_44_SC5 count integer Number of insects colonizing day 44 (SC5 d44)
18 Num_insects_day_20_SE1 count integer Number of insects colonizing day 20 (SE1 d20)
19 Num_insects_day_32_SE1 count integer Number of insects colonizing day 32 (SE1 d32)
20 Num_insects_day_44_SE1 count integer Number of insects colonizing day 44 (SE1 d44)
21 Num_insects_day_20_SE2 count integer Number of insects colonizing day 20 (SE2 d20)
22 Num_insects_day_32_SE2 count integer Number of insects colonizing day 32 (SE2 d32)
23 Num_insects_day_44_SE2 count integer Number of insects colonizing day 44 (SE2 d44)
24 Num_insects_day_20_SE3 count integer Number of insects colonizing day 20 (SE3 d20)
25 Num_insects_day_32_SE3 count integer Number of insects colonizing day 32 (SE3 d32)
26 Num_insects_day_44_SE3 count integer Number of insects colonizing day 44 (SE3 d44)
27 Num_insects_day_20_SE4 count integer Number of insects colonizing day 20 (SE4 d20)
28 Num_insects_day_32_SE4 count integer Number of insects colonizing day 32 (SE4 d32)
29 Num_insects_day_44_SE4 count integer Number of insects colonizing day 44 (SE4 d44)
30 Num_insects_day_20_SE5 count integer Number of insects colonizing day 20 (SE5 d20)
31 Num_insects_day_32_SE5 count integer Number of insects colonizing day 32 (SE5 d32)
32 Num_insects_day_44_SE5 count integer Number of insects colonizing day 44 (SE5 d44)

Data Table: 4022_transects (Data table describing transects data for data set 4022., 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 Month MM integer Month
2 Day DD integer Day
3 Year YYYY integer Year
4 Transect none alphanumeric string Transect ID
5 Rhodo_leaves_dry_weight g/m^2 floating-point Dry weight of rhododendron leaves collected in 1 m wide transect; g/m^2
6 Non_rhodo_leaves_dry_weight g/m^2 floating-point Dry weight of non-rhododendron leaves collected in 1 m wide transect; g/m^2