lterdb07-Soil Characteristics of Landslides

LUQ LTER DATA SETS DOCUMENTATION FORM

ON-LINE VERSION

A DATA SET is a series of observations collected by the same methodology. Each data set should have documentation sufficient for someone unfamiliar with the research to replicate the study. Data sets may be broken into subsets (data files) that are discrete in space and time, in that order. The documentation for a data set should include all spatial and temporal subdivisions of the data.

(Data, Abstract, Methods, Variables)

NOTES:

Add rows to tables or lines to paragraphs as you need them for entering your data.
Contact emelendez@lternet.edu if you have any question.
See online Guidelines (http://luq.lternet.edu/datamng/imdocs/division.html) to help you fill this form

PERSON(S) COMPLETING THIS FORM: E-MAIL ADDRESS:

Lars Walker	walker@lternet.edu
Alejandra Riaño	Alejandrarg00@hotmail.com
Eda C. Meléndez-Colom	emelendez@lternet.edu

DATA SET IDENTIFIER: Soil Characteristics of Landslides

PROJECT TITLE: Landslide Revegetation Project

PROJECT DESCRIPTION: Landslide are among the most severe rainforest disturbances (Garwood et al. 1979, Hubbell & Foster 1986, Sousa 1984, Waide & Lugo 1992, Walker et al. in press), generating extreme abiotic spatial gradients (Fernández & Myster 1995) and exposing soil and parent material (Guariguata 1990). Landslides contain patches of vegetation surrounded by a matrix of soil or bare substrate (Dalling 1994, Myster & Fernández 1995). In addition, they often undergo recurrent localized disturbance either by resliding or by treefall at the edge of the landslide (Hartshorn 1980), thereby adding new plant preopagules, soil or organic material after the initial slippage. These landslide feature, coupled with interactions between patches of similar soil or vetetation (including seed dispersal, shading, litter deposition and vegetative reproduction), strongly suggets that landslide are a patch-dynamic system (Hupp 1983, Pickett & White 1985).

Changes in the composition and abundance of species within these patches over space and time can be considered successional pathways (Austin 1977, Myster & Pickett 1990). Analysis of the pathways can indicate (i) spatial and temporal variation in initial species richness and rate of species turnover (Myster & Pickett 1994), (ii) important species that define pathways and may suggest key regeneration strategies, (iii) community convergence or divergence, and (iv) the effects of past history and land-use (Myster &Pickett 1990, 1994).

Here we use permanent plot data sampled from 16 landslide to documents temporal successional pathways in landslide patches (without the use of a chronosequence, cf. Guariguata 1990) and address the following questions: (1) What are the successional pathways of landslide and what species define them ? How much pathway variation of individual plots is there within these landslides ? (2) How similar are pathways among landslide ? Is there any evidence that, with time, landslides either converge to a common vegetative enpoint or slow in the rate of successional change?

LTER CORE AREAS: (Annotate all that apply)

Primary Productivity & Populations

LEF LTER 1 RESEARCH TOPIC: (Annotate all that apply)

2b. Nutrient Storage.

2c. Soil organic matter formation

We define a data file as a component of a data set. A data set can have only one data file or more. Basically, different data files have different data structures or format.
DATA SET FILES (SUBSETS):

Data File No.

Data File Identifier

On-Line Filename

Starting Date

Periodicity of sample

End Period

1

INTENSIVE ES-1 Soil data

Lses1nut.txt

6/3/88

once

6/3/88

2

INTENSIVE ES-2 Soil data

Lses2nut.txt

10/25/88

once

10/25/88

3

INTENSIVE RB-2 Soil data

Lsrb2nut.txt

1/1/89

once

10/25/88

4
Soil factors in ES2 and RB2 microhabitats SoilfactorsinES2andRB2microhabitats.txt 10/25/88 once
10/25/88

RESEARCH LOCATION: Luquillo Experimental Forest's ES-1 (Espiritu Santo (near the El Verde Station), ES-2 (Espiritu Santo landslide 2), and RB-2 (Rio Blanco landslide 2) Extensive landslides. Location in the Plot: for Intensive landslides (ES-1 and ES-2), R (right, when facing the top of the slide), and L (left); for - Extensive slides, LL (lower left) and UR (upper right).

INVESTIGATORS:

PRINCIPAL INVESTIGATORS E-MAIL address

D.J. Lodge DJLodge@coqui.net

OTHER RESEARCHERS E-MAIL address

Lars Walker

walker@lternet.edu

B. Haines

bhaines@lternet.edu

X. Zou

xzou@lternet.edu

R. Myster

rmyster@lternet.edu

CONTACT PERSONS E-MAIL address Phone Number (Include area code)

Lars Walker

walker@lternet.edu

(702)895-3399

D. Jean Lodge
DJLodge@coqui.net
(787)889-7445

SOURCE OF FUNDING (SPONSOR): LTER - NSF

DATA SET ABSTRACT: Analysis of soil nutrients in top 9 cm of soil in Landslide Revegetation Plots.

DATA SET METHODS: (See protocol)

REFERENCES:

CROSS-REFERENCES (other data sets related to this one):LTERDBAS 15 (Revegetation of landslides, vegetation 0.1 m), LTERDBAS 18 (Revegetation of landslides, vegetation 1.0 m) , and LTERDBAS 36 (Landslide revegetation measurements)

SAMPLE LOCATION: ES – 1 are lost (R. Myster office) and B. Haines

STORAGE SITES (of data files): Data Management File Cabinet DM-001 Drawers #2 & 3

INVESTIGATOR'S ASSIGNED KEYWORDS: nutrient availability, bulk density of soils, landslides

LEF LTER OFFICIAL KEYWORDS (See table): LANDSLIDE PLOTS, DISTURBANCE, SOILS, HIGHER PLANTS, PEER REVIEWED JOURNAL

PUBLICATIONS:
1. ESA 1991 abstract D.J. Lodge and F. Calderón
2. Third European Conference on Mycrhizea Sheffield England, September, 1991.
3. F. Calderón Master Thesis UPR Spring 1992.

DISSEMINATION: UNRESTRICTED

REASONS TO RESTRICT DATA IN THIS DATA SET BEYOND ITS TWO YEAR POLICY PERIOD*:

*WILL HAVE TO BE APPROVED BY LTER PRINCIPAL INVESTIGATORS: J. ZIMMERMAN, A. LUGO , D.J. LODGE

FILING
___ "File" copy only : Data Management will only file an electronic copy of the data file and its documentation
_X__ "Enter" data on-line : Data Management will be in charge of entering the data on computer files (ContactEda C. Meléndez)

SITES DESCRIPTIONS:Each of the extensive and intensive landslides in which we are studying revegetation in the LTER has plots 2x5 m distributed along transect lines at 10 m intervals from the upper lip of the slide. The intensive slides (ES-1, ES-2 and RB-2) have 24 plots each, with a 2x1 m seedling subplot along the lower edge of the plot. The extensive slides have various numbers of plots, and there are no seedling subplots within them.

Geographical positional system (GPS) Coordinates for each location:

location

latitude

longitude

Espiritu Santo 1 (ES-1) landslide plot

Espiritu Santo 2 (ES-2) landslide plot

Rio Blanco 2 (RB-2) landslide plot

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in which the variable appears)
1, 2, 3

1, 2, 3

1

1

ABBREVIATION (as it appears on the data file)
Landslide

Tr/Pl/Side

Bulkdensity

PPMPHOS

NAME OF VARIABLE

Landslide name (abbreviated)

Transect-Plot-Side

Bulk density

Phosphorus (parts per million)

DEFINITION OF VARIABLE

Name of the landslide using the first letter of each word and the assigned number of the landslide

#of decimeter from the top of the slide-# meters from L side of slide facing uphill-Left & Right side of plot

Dry weight of soil⁽¹⁾ in core sample per volume of the core⁽²⁾ in cubic cm

Olsen-extractableP on air dry soil

UNIT

N/A

N/A

g / cm3

Ppm

PRECISION

N/A

N/A

.001

.1

RANGE OR LIST OF VALUES

ES1 = Espiritu Santo 1,
ES2 = Espiritu Santo 2,
RB2 = Rio Balnco 2

T= TR = {1-6},
P = {1-20}
S= Side = {L=Left, R = Right}

DATA TYPE

Alphanumeric

Alphanumeric

Decimal

Decimal

MISSING DATA CODES

none

none

none

None

Observations:⁽¹⁾Dry weight of soil =[Weight of small rocks * (Total Initial Fresh Weight - (Weight of large rocks + Fresh Weight of roots))] ¸ [Weight of soil subsample]² * [Net dry weight of finely seived soil / Net wet weight of finely seived soil placed into the drying oven]
⁽²⁾Volume of the core is V = pi * r² * depth, where pi = 3.14 and depth = 9 cm

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in which the variable appears)
1

1

1

1

ABBREVIATION (as it appears on the data file)
P/msq

Ca(ppm)

Mg(ppm)

Na (ppm)

NAME OF VARIABLE

Phosphorus (per meter square)

Calcium (parts per million)

Magnesium (parts per million)

Sodium (parts per million)

DEFINITION OF VARIABLE

Calculated P availability per square meters

UNIT

g / m²

ppm

ppm

Ppm

PRECISION

.001

.01

.01

.01

RANGE OR LIST OF VALUES

DATA TYPE

Decimal

Decimal

Decimal

Decimal

MISSING DATA CODES

None

None

None

None

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in which the variable appears)
1

1

1

1

ABBREVIATION (as it appears on the data file)
K (ppm)

Al (ppm)

CICE (ppm)

Org Mat wt (g)

NAME OF VARIABLE

Potassium (parts per million)

Aluminium (parts per million)

Cation exchange capacity

Wood and Organic matter

DEFINITION OF VARIABLE

Weight of wood or organic matter

UNIT

Ppm

Ppm

Ppm

g

PRECISION

.01

.01

.01

.001

RANGE OR LIST OF VALUES

DATA TYPE

Decimal

Decimal

Decimal

MISSING DATA CODES

None

None

None

blank

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in which the variable appears)
2, 3

2, 3

1, 2, 3

2, 3

ABBREVIATION (as it appears on the data file)
Fresh Weight (gr)

Large Rocks (gr)

Roots wt (g) - 1, Fresh Weight of roots (gr) -2, 3

Dry Weight of roots (gr)

NAME OF VARIABLE

Total Initial Fresh Weight

Weight of large rocks

Fresh Weight of roots

Dry Weight of roots

DEFINITION OF VARIABLE

weight of the entire soil core fresh

Weight of large rocks removed on the 4-5 mm mesh seive

fresh weight of roots

dry weight of roots

UNIT

g

g

g

g

PRECISION

.01

.01

.01

.01

RANGE OR LIST OF VALUES

DATA TYPE

decimal

decimal

decimal

Decimal

MISSING DATA CODES

blank

blank

blank

blank

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in which the variable appears)
2, 3

2, 3

2, 3

2, 3

ABBREVIATION (as it appears on the data file)
Soil subsample (~100 gr)

Small rocks (gr)
Weight of finely sieved soil (gr)
Total N (%)

NAME OF VARIABLE

Weight of soil subsample

Weight of small rocks

Weight of finely sieved soil (gr)

Total Nitrogen percent

DEFINITION OF VARIABLE

weight of soil subsample (ca. 100g) put on the 2mm mesh seive

weight of rocks remaining on the fine (2 mm mesh) seive

Weight of finely sieved soil placed in tube for extraction of N with KCL (about 4 g)

UNIT

(~100 g)

g

g

Percent

PRECISION

.01

.01

.01

10E-8

RANGE OR LIST OF VALUES

DATA TYPE

Decimal

Decimal

Decimal

Decimal

MISSING DATA CODES

blank

blank

blank

blank

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in whichthe variable appears)

2, 3

2, 3

2, 3

2, 3

ABBREVIATION (as it appears on the data file) Total C (%)
Sample weight (g)

Extract P (mg/L)

Sample P (%)

NAME OF VARIABLE

Total Carbon percent

Weight of sample

Extract Phosphorus

Sample Phosphorus percent

DEFINITION OF VARIABLE

UNIT

Percent

g

mg/L

Percent

PRECISION

10E-7

.0001

.0001

.0001

RANGE OR LIST OF VALUES

DATA TYPE

Decimal

Decimal

Decimal

Decimal

MISSING DATA CODES

Blank

blank

blank

Blank

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in whichthe variable appears)

2, 3
4 4 4

ABBREVIATION (as it appears on the data file)
Sample P (%)
Microsite Landslide Transect

NAME OF VARIABLE

Sample Phosphorus
Microsite Landslide Transect

DEFINITION OF VARIABLE
Percent of phosphorus in sample Location in landslide Landslide from which sample of soil was extracted Transect on the landslide from which sample of soil was extracted

UNIT

N/A
N/A N/A N/A

PRECISION

.0001
N/A N/A N/A

RANGE OR LIST OF VALUES
Center
Forest
Landslide
Forest border
Landslide border ES1
ES2 1, 2, 3

DATA TYPE

Decimal
Alphabetic Alphanumeric integer

MISSING DATA CODES

none
none none none

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE (all in whichthe variable appears)
4 4 4 4

ABBREVIATION (as it appears on the data file) P N C M

NAME OF VARIABLE
Phosphorus concentration in dry
soil Nitrogen concentration in dry soil total
carbon concentration soil moisture percentage

DEFINITION OF VARIABLE
total phosphorus (P) concentrations in dry
soil in kg/m2 to 9 cm depth total nitrogen (N) concentrations in dry soil in kg/m2 to 9 cm depth total
carbon (C) concentrations in dry soil in kg/m2 to 9 cm soil moisture (M) percentage of dry weight

UNIT
kg/m2 kg/m2 kg/m2

PRECISION
.001 .001 .001

RANGE OR LIST OF VALUES

DATA TYPE

Decimal

Decimal

Decimal

Integer

MISSING DATA CODES

none

none

none

none

COMPUTATIONAL METHODS:

Variable Name

Formula

Dry weight of soil

See Observation ⁽¹⁾ above

Volume of the core

See Observation ⁽²⁾ above

FOR DATA MANAGER USE ONLY

DATE OF LAST REVIEW: May 15, 2006
DATE OF LAST ENTRY:
STAGE OF DATA SET MANAGEMENT (dates):
RECEIVED ENTERED: 2/5/92
FILED ON-LINE REVIEWED BY RESEARCHER: Oct 2000
FILING MEDIA:
NAME OF DOCUMENTATION FILE : lterdb7.htm
NAME OF ON - LINE CATALOG : LTERDBAS
RECORD #: 7
DOCUMENT TYPE:Data
PRIORITY TO BE ENTERED: Third

Rev. date of this form: 15 July 2001

Data File No.	Data File Identifier	On-Line Filename	Starting Date	Periodicity of sample	End Period
1	INTENSIVE ES-1 Soil data	Lses1nut.txt	6/3/88	once	6/3/88
2	INTENSIVE ES-2 Soil data	Lses2nut.txt	10/25/88	once	10/25/88
3	INTENSIVE RB-2 Soil data	Lsrb2nut.txt	1/1/89	once	10/25/88
4	Soil factors in ES2 and RB2 microhabitats	SoilfactorsinES2andRB2microhabitats.txt	10/25/88	once	10/25/88

Lars Walker	walker@lternet.edu
B. Haines	bhaines@lternet.edu
X. Zou	xzou@lternet.edu
R. Myster	rmyster@lternet.edu

Lars Walker	walker@lternet.edu	(702)895-3399
D. Jean Lodge	DJLodge@coqui.net	(787)889-7445

location	latitude	longitude
Espiritu Santo 1 (ES-1) landslide plot
Espiritu Santo 2 (ES-2) landslide plot
Rio Blanco 2 (RB-2) landslide plot

FILE NAME OR #ABOVE (all in which the variable appears)	1, 2, 3	1, 2, 3	1	1
ABBREVIATION (as it appears on the data file)	Landslide	Tr/Pl/Side	Bulkdensity	PPMPHOS
NAME OF VARIABLE	Landslide name (abbreviated)	Transect-Plot-Side	Bulk density	Phosphorus (parts per million)
DEFINITION OF VARIABLE	Name of the landslide using the first letter of each word and the assigned number of the landslide	#of decimeter from the top of the slide-# meters from L side of slide facing uphill-Left & Right side of plot	Dry weight of soil⁽¹⁾ in core sample per volume of the core⁽²⁾ in cubic cm	Olsen-extractableP on air dry soil
UNIT	N/A	N/A	g / cm3	Ppm
PRECISION	N/A	N/A	.001	.1
RANGE OR LIST OF VALUES	ES1 = Espiritu Santo 1, ES2 = Espiritu Santo 2, RB2 = Rio Balnco 2	T= TR = {1-6}, P = {1-20} S= Side = {L=Left, R = Right}
DATA TYPE	Alphanumeric	Alphanumeric	Decimal	Decimal
MISSING DATA CODES	none	none	none	None

FILE NAME OR #ABOVE (all in which the variable appears)	1	1	1	1
ABBREVIATION (as it appears on the data file)	P/msq	Ca(ppm)	Mg(ppm)	Na (ppm)
NAME OF VARIABLE	Phosphorus (per meter square)	Calcium (parts per million)	Magnesium (parts per million)	Sodium (parts per million)
DEFINITION OF VARIABLE	Calculated P availability per square meters
UNIT	g / m²	ppm	ppm	Ppm
PRECISION	.001	.01	.01	.01
RANGE OR LIST OF VALUES
DATA TYPE	Decimal	Decimal	Decimal	Decimal
MISSING DATA CODES	None	None	None	None

FILE NAME OR #ABOVE (all in which the variable appears)	1	1	1	1
ABBREVIATION (as it appears on the data file)	K (ppm)	Al (ppm)	CICE (ppm)	Org Mat wt (g)
NAME OF VARIABLE	Potassium (parts per million)	Aluminium (parts per million)	Cation exchange capacity	Wood and Organic matter
DEFINITION OF VARIABLE				Weight of wood or organic matter
UNIT	Ppm	Ppm	Ppm	g
PRECISION	.01	.01	.01	.001
RANGE OR LIST OF VALUES
DATA TYPE	Decimal	Decimal	Decimal
MISSING DATA CODES	None	None	None	blank

FILE NAME OR #ABOVE (all in which the variable appears)	2, 3	2, 3	1, 2, 3	2, 3
ABBREVIATION (as it appears on the data file)	Fresh Weight (gr)	Large Rocks (gr)	Roots wt (g) - 1, Fresh Weight of roots (gr) -2, 3	Dry Weight of roots (gr)
NAME OF VARIABLE	Total Initial Fresh Weight	Weight of large rocks	Fresh Weight of roots	Dry Weight of roots
DEFINITION OF VARIABLE	weight of the entire soil core fresh	Weight of large rocks removed on the 4-5 mm mesh seive	fresh weight of roots	dry weight of roots
UNIT	g	g	g	g
PRECISION	.01	.01	.01	.01
RANGE OR LIST OF VALUES
DATA TYPE	decimal	decimal	decimal	Decimal
MISSING DATA CODES	blank	blank	blank	blank

FILE NAME OR #ABOVE (all in whichthe variable appears)	2, 3	4	4	4
ABBREVIATION (as it appears on the data file)	Sample P (%)	Microsite	Landslide	Transect
NAME OF VARIABLE	Sample Phosphorus	Microsite	Landslide	Transect
DEFINITION OF VARIABLE	Percent of phosphorus in sample	Location in landslide	Landslide from which sample of soil was extracted	Transect on the landslide from which sample of soil was extracted
UNIT	N/A	N/A	N/A	N/A
PRECISION	.0001	N/A	N/A	N/A
RANGE OR LIST OF VALUES		Center Forest Landslide Forest border Landslide border	ES1 ES2	1, 2, 3
DATA TYPE	Decimal	Alphabetic	Alphanumeric	integer
MISSING DATA CODES	none	none	none	none

Variable Name	Formula
Dry weight of soil	See Observation ⁽¹⁾ above
Volume of the core	See Observation ⁽²⁾ above