# Log leachates from the Andrews Experimental Forest, 1986-1992 ## Dataset - **Database Code:** TD025 - **Title:** Log leachates from the Andrews Experimental Forest, 1986-1992 - **Abstract:** This study is part of the long-term log decay study (200 years). The experiments are being conducted at six sites located within intact old-growth Douglas-fir-western hemlock forests. This study tests the effect of log species and decomposition on the release of nutrients and carbon via leaching. This experiment is designed to investigate flow pathway through these logs; that is, throughfall, run-off from the top, and leachate from the bottom. Water collectors were installed on each log to collect the sample to be analyzed for various nitrogen and carbon content. - **Keywords:** decay rates; decomposition; nutrient cycling; inorganic nutrients; coarse woody debris; dissolved organic carbon; nitrogen; ammonium; nitrate; cations; organic matter; logs; Long-Term Ecological Research (LTER); inorganic nutrients; organic matter - **Temporal coverage:** 1986-09-01 to 1992-12-31 - **Principal Investigator:** Mark E. Harmon ## Data Entities 1. TD02501 2. TD02502 3. TD02503 4. TD02504 5. TD02505 ## Entity 1: TD02501 ### Attribute list - **STCODE** — varchar, freetext Database code - **FORMAT** — numeric(1.000000), range 1.0000 1.0000, number Entity number - **STUDYID** — varchar, enum Study site where the leachate was collected - **HJA** — H.J. ANDREWS EXPERIMENTAL FOREST OREGON SEE TD14.ABS FOR THE DETAILES OF THIS STUDY AND SITE DESCRIPTION - **SITE** — varchar, enum Log decomposition site (see abstract for full description) - **1** — TSUGA/ABIES/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 1065/ TEMP. DEGREE CENTIGRADE 8.9/ PRECIPITATION CM/YEAR 229 - **2** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 935/ TEMP. DEGREE CENTIGRADE 9.6/ PRECIPITATION CM/YEAR 207 - **3** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 535/ TEMP. DEGREE CENTIGRADE 9.4/ PRECIPITATION CM/YEAR 209 - **4** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 865/ TEMP. DEGREE CENTIGRADE 9.9/ PRECIPITATION CM/YEAR 219 - **5** — TSUGA/ABIES/LINNEA COMMUNITY TYPE ELEVATION M 1135/ TEMP. DEGREE CENTIGRADE 9.0/ PRECIPITATION CM/YEAR 232 - **6** — TSUGA/ABIES/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 935/ TEMP. DEGREE CENTIGRADE 8.0/ PRECIPITATION CM/YEAR 222 - **SPECIES** — varchar, enum Species of log - **ABAM** — Abies amabilis - **PSME** — Pseudotsuga menziesii - **THPL** — Thuja plicata - **TSHE** — Tsuga heterophylla - **LOGNUM** — numeric(1.000000), range 32.0000 505.0000, number Log number - **SDAY** — datetime, freetext Start day - **SMONTH** — datetime, freetext Start month - **SYEAR** — datetime, freetext Start year - **EDAY** — datetime, freetext End day - **EMONTH** — datetime, freetext End month - **EYEAR** — datetime, freetext End year - **BULKTIME** — numeric(1.000000), range 1.0000 99.0000, number Period that water samples were bulked for analysis. null=samples not bulked and passed through ion collector resin - **FTYPE** — varchar, enum Flow pathway that was measured - **B** — BOTTOM LEACHATE FLOWS - **S** — RUN-OFF FROM THE SIDE OF THE LOG - **T** — THROUGH-FALL FLOWS - **VOL** — numeric(0.010000), range 0.0000 30.0000, liters Accumulated volume of water over the period of observation. - **COLLAREA** — numeric(0.001000), range 0.0320 0.5000, square meters Projected area of the collector for a given flow - **MSVOL** — numeric(0.010000), range 0.0000 700.0000, liters Flow of water on a meter squared basis for the period of observation - **ESTIM** — varchar, enum Flow was estimated. only used when a collector malfunctioned - ** ** — WATER FLOW NOT ESTIMATED - **E** — WATER FLOW ESTIMATED ## Entity 2: TD02502 ### Attribute list - **STCODE** — varchar, freetext Database code - **FORMAT** — numeric(1.000000), range 2.0000 2.0000, number Entity number - **STUDYID** — varchar, enum Study site where the leachate was collected - **HJA** — H.J. ANDREWS EXPERIMENTAL FOREST OREGON SEE TD14.ABS FOR THE DETAILES OF THIS STUDY AND SITE DESCRIPTION - **SITE** — varchar, enum Log decomposition site (see abstract for full description) - **1** — TSUGA/ABIES/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 1065/ TEMP. DEGREE CENTIGRADE 8.9/ PRECIPITATION CM/YEAR 229 - **2** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 935/ TEMP. DEGREE CENTIGRADE 9.6/ PRECIPITATION CM/YEAR 207 - **3** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 535/ TEMP. DEGREE CENTIGRADE 9.4/ PRECIPITATION CM/YEAR 209 - **4** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 865/ TEMP. DEGREE CENTIGRADE 9.9/ PRECIPITATION CM/YEAR 219 - **5** — TSUGA/ABIES/LINNEA COMMUNITY TYPE ELEVATION M 1135/ TEMP. DEGREE CENTIGRADE 9.0/ PRECIPITATION CM/YEAR 232 - **6** — TSUGA/ABIES/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 935/ TEMP. DEGREE CENTIGRADE 8.0/ PRECIPITATION CM/YEAR 222 - **LOGNUM** — numeric(1.000000), range 32.0000 505.0000, number Log number - **SPECIES** — varchar, enum Species of log - **ABAM** — Abies amabilis - **PSME** — Pseudotsuga menziesii - **THPL** — Thuja plicata - **TSHE** — Tsuga heterophylla - **FTYPE** — varchar, enum Flow pathway that was measured - **B** — BOTTOM LEACHATE FLOWS - **S** — RUN-OFF FROM THE SIDE OF THE LOG - **T** — THROUGH-FALL FLOWS - **SMONTH** — datetime, freetext Start month - **SYEAR** — datetime, freetext Start year - **EMONTH** — datetime, freetext End month - **EYEAR** — datetime, freetext End year - **BULKTIME** — numeric(1.000000), range 1.0000 99.0000, number Period that water samples were bulked for analysis. null=samples not bulked and passed through ion collector resin - **DOC** — numeric(0.010000), range 0.0000 200.0000, parts per million Concentration of dissolved organic carbon - **TKN** — numeric(0.001000), range 0.0100 2.0000, parts per million Total Kjeldahl nitrogen for the water sample - **NO3** — numeric(0.000100), range 0.0001 0.0500, parts per million Concentration of nitrate in the water sample ## Entity 3: TD02503 ### Attribute list - **STCODE** — varchar, freetext Database code - **FORMAT** — numeric(1.000000), range 3.0000 3.0000, number Entity number - **STUDYID** — varchar, enum Study site where the leachate was collected - **HJA** — H.J. ANDREWS EXPERIMENTAL FOREST OREGON SEE TD14.ABS FOR THE DETAILES OF THIS STUDY AND SITE DESCRIPTION - **SMONTH** — datetime, freetext Start month - **SYEAR** — datetime, freetext Start year - **EMONTH** — datetime, freetext End month - **EYEAR** — datetime, freetext End year - **BULKTIME** — numeric(1.000000), range 1.0000 99.0000, number Period that water samples were bulked for analysis. null=samples not bulked and passed through ion collector resin - **SPECIES** — varchar, enum Species of log - **ABAM** — Abies amabilis - **PSME** — Pseudotsuga menziesii - **THPL** — Thuja plicata - **TSHE** — Tsuga heterophylla - **LOGNUM** — numeric(1.000000), range 32.0000 505.0000, number Log number - **FTYPE** — varchar, enum Flow pathway that was measured - **B** — BOTTOM LEACHATE FLOWS - **S** — RUN-OFF FROM THE SIDE OF THE LOG - **T** — THROUGH-FALL FLOWS - **AL** — numeric(0.010000), range 0.0000 20.0000, parts per million Concentration of aluminum in bulk solution - **B** — numeric(0.010000), range 0.0000 2.0000, parts per million Concentration of boron in bulk solution - **CA** — numeric(0.010000), range 0.0000 10.0000, parts per million Concentration of calcium in bulk solution - **CU** — numeric(0.010000), range 0.0000 2.0000, parts per million Concentration of copper in bulk solution - **FE** — numeric(0.010000), range 0.0000 2.0000, parts per million Indicates the concentration of iron in bulk solution - **K** — numeric(0.010000), range 0.0000 15.0000, parts per million Concentration of potassium in the bulk solution - **MG** — numeric(0.010000), range 0.0000 10.0000, parts per million Concentration of magnesium in the bulk solution - **MN** — numeric(0.000100), range 0.0000 10.0000, parts per million Concentration of manganese in the bulk solution - **NA** — numeric(0.010000), range 0.0000 10.0000, parts per million Concentration of sodium in the bulk solution - **P** — numeric(0.010000), range 0.0000 10.0000, parts per million Concentration of phosporus the bulk solution - **S** — numeric(0.010000), range 0.0000 10.0000, parts per million Concentration of sulfur in the bulk solution - **ZN** — numeric(0.010000), range 0.0000 10.0000, parts per million Concentration of zinc in the bulk solution ## Entity 4: TD02504 ### Attribute list - **STCODE** — varchar, freetext Database code - **FORMAT** — numeric(1.000000), range 4.0000 4.0000, number Entity number - **STUDYID** — varchar, enum Study site where the leachate was collected - **HJA** — H.J. ANDREWS EXPERIMENTAL FOREST OREGON SEE TD14.ABS FOR THE DETAILES OF THIS STUDY AND SITE DESCRIPTION - **SDAY** — datetime, freetext Start day - **SMONTH** — datetime, freetext Start month - **SYEAR** — datetime, freetext Start year - **EDAY** — datetime, freetext End day - **EMONTH** — datetime, freetext End month - **EYEAR** — datetime, freetext End year - **SPECIES** — varchar, enum Species of log - **ABAM** — Abies amabilis - **PSME** — Pseudotsuga menziesii - **THPL** — Thuja plicata - **TSHE** — Tsuga heterophylla - **LOGNUM** — numeric(1.000000), range 21.0000 505.0000, number Log number - **FTYPE** — varchar, enum Flow pathway that was measured - **B** — BOTTOM LEACHATE FLOWS - **S** — RUN-OFF FROM THE SIDE OF THE LOG - **T** — THROUGH-FALL FLOWS - **NH4** — numeric(0.001000), range 0.0000 17.4400, parts per million Concentration of NH4+ ions in solution removed from resin sink - **NO3RESIN** — numeric(0.001000), range 0.0270 1.3710, parts per million Nitrate ion concentration in solution removed from resin sinks ## Entity 5: TD02505 ### Attribute list - **STCODE** — varchar, freetext Database code - **FORMAT** — numeric(1.000000), range 5.0000 5.0000, number Entity number - **STUDYID** — varchar, enum Study site where the leachate was collected - **HJA** — H.J. ANDREWS EXPERIMENTAL FOREST OREGON SEE TD14.ABS FOR THE DETAILES OF THIS STUDY AND SITE DESCRIPTION - **SPECIES** — varchar, enum Species of log - **ABAM** — Abies amabilis - **PSME** — Pseudotsuga menziesii - **THPL** — Thuja plicata - **TSHE** — Tsuga heterophylla - **LOGNUM** — numeric(1.000000), range 32.0000 505.0000, number Log number - **YEAR** — numeric(1.000000), range 0.0000 10.0000, number of years The year since the decay experiment started (1985) - **FTYPE** — varchar, enum Flow pathway that was measured - **B** — BOTTOM LEACHATE FLOWS - **S** — RUN-OFF FROM THE SIDE OF THE LOG - **T** — THROUGH-FALL FLOWS - **WATER** — numeric(0.010000), range 50.0000 10000.0000, liters per square meter Indicates the cummulative flow of water during the year in question - **CDOC** — numeric(0.001000), range 0.1000 100.0000, grams per square meter Indicates the cuumulative flow of carbon during the year in question . - **CTKN** — numeric(0.000010), range 0.0100 10.0000, grams per square meter Indicates the cummulative flow of nitrogen during the year in question . ## Attribute Definitions **AL** Concentration of aluminum in bulk solution **B** Concentration of boron in bulk solution **BULKTIME** Period that water samples were bulked for analysis. null=samples not bulked and passed through ion collector resin **CA** Concentration of calcium in bulk solution **CDOC** Indicates the cuumulative flow of carbon during the year in question . **COLLAREA** Projected area of the collector for a given flow **CTKN** Indicates the cummulative flow of nitrogen during the year in question . **CU** Concentration of copper in bulk solution **DOC** Concentration of dissolved organic carbon **EDAY** End day **EMONTH** End month **ESTIM** Flow was estimated. only used when a collector malfunctioned **EYEAR** End year **FE** Indicates the concentration of iron in bulk solution **FORMAT** Entity number **FTYPE** Flow pathway that was measured **K** Concentration of potassium in the bulk solution **LOGNUM** Log number **MG** Concentration of magnesium in the bulk solution **MN** Concentration of manganese in the bulk solution **MSVOL** Flow of water on a meter squared basis for the period of observation **NA** Concentration of sodium in the bulk solution **NH4** Concentration of NH4+ ions in solution removed from resin sink **NO3** Concentration of nitrate in the water sample **NO3RESIN** Nitrate ion concentration in solution removed from resin sinks **P** Concentration of phosporus the bulk solution **S** Concentration of sulfur in the bulk solution **SDAY** Start day **SITE** Log decomposition site (see abstract for full description) **SMONTH** Start month **SPECIES** Species of log **STCODE** Database code **STUDYID** Study site where the leachate was collected **SYEAR** Start year **TKN** Total Kjeldahl nitrogen for the water sample **VOL** Accumulated volume of water over the period of observation. **WATER** Indicates the cummulative flow of water during the year in question **YEAR** The year since the decay experiment started (1985) **ZN** Concentration of zinc in the bulk solution ## Enumerated Domains ### STUDYID - **HJA** — H.J. ANDREWS EXPERIMENTAL FOREST OREGON SEE TD14.ABS FOR THE DETAILES OF THIS STUDY AND SITE DESCRIPTION ### SITE - **1** — TSUGA/ABIES/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 1065/ TEMP. DEGREE CENTIGRADE 8.9/ PRECIPITATION CM/YEAR 229 - **2** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 935/ TEMP. DEGREE CENTIGRADE 9.6/ PRECIPITATION CM/YEAR 207 - **3** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 535/ TEMP. DEGREE CENTIGRADE 9.4/ PRECIPITATION CM/YEAR 209 - **4** — TSUGA/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 865/ TEMP. DEGREE CENTIGRADE 9.9/ PRECIPITATION CM/YEAR 219 - **5** — TSUGA/ABIES/LINNEA COMMUNITY TYPE ELEVATION M 1135/ TEMP. DEGREE CENTIGRADE 9.0/ PRECIPITATION CM/YEAR 232 - **6** — TSUGA/ABIES/RHODODENDRON/BERBERIS COMMUNITY TYPE ELEVATION M 935/ TEMP. DEGREE CENTIGRADE 8.0/ PRECIPITATION CM/YEAR 222 ### SPECIES - **ABAM** — Abies amabilis - **PSME** — Pseudotsuga menziesii - **THPL** — Thuja plicata - **TSHE** — Tsuga heterophylla ### FTYPE - **B** — BOTTOM LEACHATE FLOWS - **S** — RUN-OFF FROM THE SIDE OF THE LOG - **T** — THROUGH-FALL FLOWS ### ESTIM - ** ** — WATER FLOW NOT ESTIMATED - **E** — WATER FLOW ESTIMATED