# Nutrient and microbial characteristics of mountain stream fine benthic organic matter in the H.J. Andrews Experimental Forest, 1995 to 1996

## Dataset

- **Database Code:** HS005

- **Title:** Nutrient and microbial characteristics of mountain stream fine benthic organic matter in the H.J. Andrews Experimental Forest, 1995 to 1996

- **Abstract:**

Numerous studies have examined qualitative shifts in leaf litter composition in the early to middle stages of decomposition. (Suberkropp, Godshalk and Klug 1976, Petersen and Cummins 1974, Findlay and Arsuffi 1989) which have shown that changes in leaf species and composition lead to marked differences in microbial processing rates (Suberkropp and Klug 1976) and that leaf and woody debris decomposition rates are related to both litter C:N and extracellular enzyme activities (Taylor et al. 1989, Sinsabaugh et al. 1992, Sinsabaugh and Linkins 1993). Since most organic matter moves through streams as fine particulate organic matter (FPOM) (Sinsabaugh et al. 1992) it is a potentially important link between terrestrial and aquatic environments. Although there is increasing interest in understanding FPOM dynamics, there have been few studies of factors influencing stream sediment FBOM chemical or microbial characteristics.


- **Keywords:** communities; stream ecology; timber harvest; organic matter; forest ecosystems; aquatic ecosystems; streams; microbes; organic matter

- **Temporal coverage:** 1995-08-09 to 1996-05-12

- **Principal Investigator:** Robert P. Griffiths


## Data Entities

1. HS00501

## Entity 1: HS00501

### Attribute list

- **DBCODE** — varchar, enum

FSDB database code

  - **HS005** — FSDB database code HS005


- **ENTITY** — numeric(1), range  1.0000  1.0000, number

Entity number


- **REFNAME** — varchar, freetext

Single letter designators for samples from undefined 1st order streams or watershed code for sediments from settling basins in watersheds in HJ Andrews Experimental Forest


- **SAMPLEDATE** — datetime, freetext

Date samples collected


- **TREAT** — varchar, enum

Stand age

  - **1** — 10-year stand
  - **2** — 30-year stand
  - **** — Old growth


- **ELEV** — varchar, enum

Elevation

  - **1** — High
  - **** — Low


- **ASPEC** — varchar, enum

Aspect

  - **** — South
  - **1** — North


- **RESPS** — numeric(0.010000), range  1.9800  213.4200, micrograms per gram per hour

CO2 respired per gram dry wt. sediment-hr


- **DENPOT** — numeric(0.010000), range  0.0000  180.7000, micrograms per gram per hour

Denitrification potential per gram dry wt.


- **EXTR_AMM** — numeric(0.010000), range  0.0000  54.5200, micrograms per gram per day

Concentration of ammonium extracted with 2m KCl


- **MIN_N** — numeric(1.000000), range  0.0000  562.0000, micrograms per gram per day

Concentration ammonium after incubation at 40 deg c for 7 days


- **N2FS** — numeric(0.100000), range  0.0000  7345.2002, micromoles per gram per hour

Acetylene reduction as an indication of nitrogen fixation


- **CARBOS** — numeric(1.000000), range  50.0000  773.0000, micrograms per gram per hour

Labile polysaccharides in mg glucose equivalents


- **ORGANICP** — numeric(0.001000), range  -0.0100  3.4800, micrograms per gram per day

Organic phosphorus


- **C_N_RATIO** — numeric(1.000000), range  11.0000  33.0000, number

Total carbon to total nitrogen ratio


- **BETAG** — numeric(0.010000), range  3.3600  396.1500, micromoles per gram per hour

Beta-glucosidase activity measured as p nitrophenol


- **PHOS** — numeric(0.100000), range  19.9000  490.7000, micromoles per gram per hour

Phosphatase activity measured as p nitrophenol


## Attribute Definitions

**ASPEC**

Aspect


**BETAG**

Beta-glucosidase activity measured as p nitrophenol


**CARBOS**

Labile polysaccharides in mg glucose equivalents


**C_N_RATIO**

Total carbon to total nitrogen ratio


**DBCODE**

FSDB database code


**DENPOT**

Denitrification potential per gram dry wt.


**ELEV**

Elevation


**ENTITY**

Entity number


**EXTR_AMM**

Concentration of ammonium extracted with 2m KCl


**MIN_N**

Concentration ammonium after incubation at 40 deg c for 7 days


**N2FS**

Acetylene reduction as an indication of nitrogen fixation


**ORGANICP**

Organic phosphorus


**PHOS**

Phosphatase activity measured as p nitrophenol


**REFNAME**

Single letter designators for samples from undefined 1st order streams or watershed code for sediments from settling basins in watersheds in HJ Andrews Experimental Forest


**RESPS**

CO2 respired per gram dry wt. sediment-hr


**SAMPLEDATE**

Date samples collected


**TREAT**

Stand age


## Enumerated Domains

### DBCODE

- **HS005** — FSDB database code HS005

### TREAT

- **1** — 10-year stand

- **2** — 30-year stand

- **** — Old growth

### ELEV

- **1** — High

- **** — Low

### ASPEC

- **** — South

- **1** — North