CWT-LTER Data Set Summary

Accession: 2017 CWT Research Theme: General Nutrient Chemistry
Contributors: Catherine Pringle, , , , ,
Title: Consequences of non-random tree species loss on litter mass loss, nutrient dynamics, carbon cycling, and decomposer communities across a terrestrial-aquatic interface at Coweeta Hydrologic Lab, Otto, NC
Abstract: Although litter decomposition is a fundamental ecological process, most of our understanding comes from studies of single-species decay. Recently, litter-mixing studies have tested whether monoculture data can be applied to mixed-litter systems. These studies have mainly attempted to detect non-additive effects of litter mixing, which address potential consequences of random species loss. The focus is not on which species are lost, but the decline in diversity per se. Under global change, species loss is likely to be non-random, with some species more vulnerable to extinction than others. Under such scenarios, the effects of individual species (additivity) as well as of species interactions (non-additivity) on decomposition rates are of interest. To examine potential impacts of non-random species loss on ecosystems, we studied additive and non-additive effects of litter mixing on decomposition. A full-factorial litterbag experiment was conducted using four deciduous leaf species, from which mass loss and nitrogen content were measured. Data were analysed using a statistical approach that first looks for additive identity effects based on the presence or absence of species and then significant species interactions occurring beyond those. It partitions non-additive effects into those caused by richness and or composition.
Key Words: movement of inorganic and organic matter, biodiversity, Coweeta LTER, decomposer community, decomposition, litter, litter decomposition, nitrogen, nutrient cycling, Otto, North Carolina, phosphorus, soil biota, soil nutrients, soil organic matter, species composition, species diversity, species loss, tree species
LTER Core Area: Movement of Organic Matter
CWT Themes: General Nutrient Chemistry, Microbiology, Organic Matter/Decomposition, Plant Ecology
Study Type: Coweeta Terrestrial Study
Study Period: 17-Nov-2003 to 17-Nov-2006
Site References:
CWTBASIN -- Coweeta Basin, Macon County, North Carolina, USA
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Data Table: LTR_NUT_2017 (Main data table for data set LTR_NUT_2017, 532)

Access: Public (released 07-Jul-2014)

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 Block none alphanumeric string Replicate block number
2 Treatment none alphanumeric string Composition treatment, using the first letter of the genus for each litter species involved in that mixture
3 Richness_level count floating-point Richness level (number of species)
4 Days days floating-point Number of days since litterbags had been placed in the field
5 Cellulose_Percent % floating-point Percent dry weight that is cellulose
6 Hemicellulose_Percent % floating-point Percent dry weight that is hemicellulose
7 Lignin_Percent % floating-point Percent dry weight that is lignin
8 Nitrogen_Percent % floating-point % N of litter dry weight
9 Carbon_Percent % floating-point % C of litter dry weight
10 Phosphorus_Percent % floating-point % P of litter dry weight
11 Percent_AFDM_remaining % floating-point % Ash-free dry mass (AFDM) remaining
12 Total_phenolics_Percent % floating-point % dry weight that is total phenolics
13 Hydrolyzable_tannins_Percent % floating-point % dry weight that is hydrolyzable tannins
14 Condensed_tannins_Percent % floating-point % dry weight that is condensed tannins
15 BF_Nematodes_abundance count floating-point Abundance of bacterial-feeding (abbreviated as BF) nematodes, count per g ash free dry mass (AFDM)
16 FF_Nematodes_abundance count floating-point Abundance of fungal-feeding (abbreviated as FF) nematodes, count per g ash free dry mass (AFDM)
17 Predatory_Nematodes_abundance count floating-point Abundance of predatory nematodes, count per g ash free dry mass (AFDM)
18 Omnivorous_Nematodes_abundance count floating-point Abundance of omnivorous nematodes, count per g ash free dry mass (AFDM)
19 PF_Nematodes_abundance count floating-point Abundance of lower plant-feeding (abbreviated as PF) nematodes, count per g ash free dry mass (AFDM)
20 Unidentified_Nematodes_abundance count floating-point Abundance of unidentified nematodes, count per g ash free dry mass (AFDM)
21 Total_Nematode_abundance count floating-point Total nematode abundance, count per g ash free dry mass (AFDM)
22 Tardigrades_abundance count floating-point Abundance of Tardigrades, count per g ash free dry mass (AFDM)
23 Copepods_abundance count floating-point Abundance of Copepods, count per g ash free dry mass (AFDM)
24 Oribatid_mites_abundance count floating-point Abundance of oribatid mites, count per g ash free dry mass (AFDM)
25 Mesostigmatid_mites_abundance count floating-point Abundance of Mesostigmatid mites, count per g ash free dry mass (AFDM)
26 Prostigmatid_mites_abundance count floating-point Abundance of prostigmatid mites, count per g ash free dry mass (AFDM)
27 Collembola_abundance count floating-point Abundance of Collembola, count per g ash free dry mass (AFDM)
28 Total_micro_and_macro_arthropods count floating-point Total abundance of all micro- and macroarthropods extracted by heat, count per g ash free dry mass (AFDM)
29 Microarthropod_richness count floating-point Total richness of microarthropod orders found in the sample; number of taxa
30 Bacterial_Carbon mg/g floating-point Bacterial carbon associated with the litter (mg C / g AFDM)
31 Fungal_Carbon mg/g floating-point Fungal carbon associated with the litter (mg C / g AFDM)