DATA SET IDENTIFIER: Canopy invertebrate responses to disturbance at the Canopy Trimming Experiment (CTE) plots

PROJECT TITLE: Canopy Trimming Experiment (CTE): Canopy Arthropods

PROJECT DESCRIPTION: This long-term experiment will increase the frequency of simulated hurricane effects above background levels to once every six years. The experiment will determine effects of repeated disturbance of the forest canopy and increased detrital inputs to the forest floor on germination, growth, survival, nutrient cycling, soil conditions, and trophic structure. Climate change models predict increased frequency and intensity of Caribbean hurricanes (Emmanuel 1987, Goldenberg et al. 2001), and our goal is to evaluate predictions regarding the effects of an increased rate of hurricane disturbance on tabonuco forest (Sanford et al. 1991). The experiment also is designed to decouple the effects of canopy disturbance (e.g. , light levels, temperature, moisture, etc. ) from those of increased detrital inputs on rates of detrital processing and resultant community and ecosystem processes. Manipulations and measurements of detrital processing, SOM, and soil properties associated with SOM will continue for at least three more funding periods (until 2024). In the short-term, we will use faunal manipulations nested within the canopy trimming experiment to measure the strength of interactions between autotrophic and detrital food webs in the context of hurricane-like disturbance. These results will be directed specifically at parameterizing the Trophic Interaction Model. This experiment also will provide a physical and intellectual focal point for the project participants. The Canopy Trimming Experiment has two parts: 1) a forest canopy manipulation with measurements of coupled changes in microclimate, structure, and biota and their associated impacts on ecosystem processes, and 2) specific manipulations of the biota that assess the importance of components of the food web.

CTE Canopy Arthropods
This project addresses canopy invertebrate responses to CTE treatments, for comparison with invertebrate responses to canopy-opening hurricane disturbances dating from 1991.  One year of pre-treatment and three years of post-treatment data are available. Statistical analyses are in progress.

LTER CORE AREAS: (Annotate all that apply)

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

Population recovery after disturbance

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	CTE Canopy Arthropods data	CTEArthropods2004-6.txt	January 25, 2004	annually	July 23, 2006
2	Litter Athropods Weights	LitterAthropodsWeights.txt	July 2003	once	July 2003

RESEARCH LOCATION: CTE A, B , C Plots:30+ m West of western edge of Big Grid, on North and South side of Prieta stream, near Vogt old plots; 30+ m South of Big Grid, all plots along Oxcart Trail;30+ m West of SE corner of Big Grid, respectively

INVESTIGATORS:

PRINCIPAL INVESTIGATORS E-MAIL address

T.D. Schowalter

tschowalter@agcenter.lsu.edu

OTHER RESEARCHERS E-MAIL address

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

T.D. Schowalter

tschowalter@agcenter.lsu.edu

225-578-1634

SOURCE OF FUNDING (SPONSOR): NSF LTER subcontract through UPR (until 2001 only- after that data has been voluntarily shared by the Investigator.)

DATA SET ABSTRACT: Seven tree species were selected to represent early (Cecropia, Prestoea) and late (Dacryodes, Manilkara, Sloanea) successional, and overstory (Cecropia, Dacryodes, Manilkara, Sloanea) and understory (Prestoea, Miconia, Psychotria), species in forests at El Verde. These trees were sampled in all CTE plots.

DATA SET METHODS: A long-handled insect net with closeable plastic bag was used to collect foliage-bearing branches up to 10-12 m heights in gap and non-gap plots, within a 15 m radius around the points identified above. Bags were sealed until invertebrates could be sorted. Invertebrates were counted by phenotype; foliage was pressed, dried, weighed, and measured for leaf area missing as a result of herbivory.

REFERENCES:

CROSS-REFERENCES (other data sets related to this one): LTERDBAS #96: Canopy invertebrate responses to Hurricane Hugo at several El Verde plots- LUQINVERT

SAMPLE LOCATION: Oregon State University, Entomology Dept.

STORAGE SITES: Oregon State University, Forest Science and Entomology Depts.;

INVESTIGATOR'S ASSIGNED KEYWORDS: Invertebrates, insects, arthropods, Lepidoptera, Homoptera, spiders, mites, Dacryodes, Manilkara, Sloanea, Cecropia, Casearia, Prestoea, disturbance

LEF LTER OFFICIAL KEYWORDS (See table): EL VERDE, CTE blocks, TABONUCO, DISTURBANCE, INSECTS

PUBLICATIONS:

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: N. BROKAW, A. LUGO

SITES DESCRIPTIONS: Block A: Elevation (340-360); aspect SW-facing; Location 30+ m West of western edge of Big Grid, on North and South side of Prieta stream, near Vogt old plots. Block B: Elevation (450-485); aspect W-SW facing; Location 30+ m South of Big Grid, all plots along Oxcart Trail. Block C: Elevation (435-480 m); aspect West-facing; Location 30+ m West of SE corner of Big Grid.

Geographical positional system (GPS) Coordinates for each location:

location	latitude	longitude

The following table displays the x and y coordinates in Puerto Rico Planar Coordinates:

BlockPlot	X	Y
A1	217379	54625
A2	217437	54631
A3	217423	54720
A4	217460	54684
B1	217824	54356
B2	217875	54344
B3	217913	54278
B4	217970	54217
C1	217878	54476
C2	217933	54476
C3	217998	54480
C4	218094	54544

VARIABLES (ATTRIBUTES):

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE(all in which the variable appears)	1	1	1	1	1	1	1	1
ABBREVIATION(as it appears on the data file)	PHS	CHR	LP1	LP2	LP3	LP4	GEO	DER
NAME OF VARIABLE	Phasmid	Chrysolmelid	Lepidoptera 1	Lepidoptera 2 (Pyralid?)	Lepidoptera 3	Moth of the Lepidoptera family	Geometrid	Derbid, Dawnaria
DEFINITION OF VARIABLE	Number of individuals of Phasmid invertebrate morphotype	Number of individuals of Chrysolmelid invertebrate morphotype	Number of individuals of Lepidoptera 1 invertebrate morphotype	Number of individuals of Lepidoptera 2 (Pyralid?) invertebrate morphotype	Number of individuals of Lepidoptera 3 invertebrate morphotype	Number of individuals of Moth of the Lepidoptera family invertebrate morphotype	Number of individuals of Geometrid invertebrate morphotype	Number of individuals of Derbid, Dawnaria invertebrate morphotype
UNIT
PRECISION
RANGE OR LIST OF VALUES	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...
DATA TYPE	integer	integer	integer	integer	integer	integer	integer	integer
MISSING DATA CODES

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE(all in which the variable appears)	1	1	1	1	1	1	1	1
ABBREVIATION(as it appears on the data file)	DEL	PSE	APH	TRP	MEM	FLT	CX1	CIC
NAME OF VARIABLE	Delphacid	Pseudoflatoides	Aphid	Tropiduchid	Membracid	Flatid, Petrusa	Cixiid 1	Cicadellid
DEFINITION OF VARIABLE	Number of individuals of Delphacid invertebrate morphotype	Number of individuals of Pseudoflatoides invertebrate morphotype	Number of individuals of Aphid invertebrate morphotype	Number of individuals of Tropiduchid invertebrate morphotype	Number of individuals of Membracid invertebrate morphotype	Number of individuals of Flatid, Petrusa invertebrate morphotype	Number of individuals of Cixiid 1 invertebrate morphotype	Number of individuals of Cicadellid invertebrate morphotype
UNIT
PRECISION
RANGE OR LIST OF VALUES	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...
DATA TYPE	integer	integer	integer	integer	integer	integer	integer	integer
MISSING DATA CODES

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE(all in which the variable appears)	1	1	1	1	1	1	1	1
ABBREVIATION(as it appears on the data file)	PSY	CC1	CC2	CC3	CC4	MIR	CX2	BT1
NAME OF VARIABLE	Psyllid	Scale, Vinsonia stellifera	Scale, long, brown	Scale, hemispherical	Scale, flat, round	Mirid	Cixiid 2	Blattid 1
DEFINITION OF VARIABLE	Number of individuals of Psyllid invertebrate morphotype	Number of individuals of Scale, Vinsonia stellifera invertebrate morphotype	Number of individuals of Scale, long, brown invertebrate morphotype	Number of individuals of Scale, hemispherical invertebrate morphotype	Number of individuals of Scale, flat, round invertebrate morphotype	Number of individuals of Mirid invertebrate morphotype	Number of individuals of Cixiid 2 invertebrate morphotype	Number of individuals of Blattid 1 invertebrate morphotype
UNIT
PRECISION
RANGE OR LIST OF VALUES	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...
DATA TYPE	integer	integer	integer	integer	integer	integer	integer	integer
MISSING DATA CODES

VARIABLES (ATTRIBUTES):

FILE NAME OR #ABOVE(all in which the variable appears)	1	1	1	1	1	1	1	1
ABBREVIATION(as it appears on the data file)	BT2	OR3	COL	PSO	CLM	OR1	OR2	URP
NAME OF VARIABLE	Blattid 2, beetle-like	Oribatid 3	Collembola	Psocoptera	Clambid beetle	Oribatid 1, like Camisia	Oribatid 2, like Opiella	Uropodid mite
DEFINITION OF VARIABLE	Number of individuals of Blattid 2, beetle-like invertebrate morphotype	Number of individuals of Oribatid 3 invertebrate morphotype	Number of individuals of Collembola invertebrate morphotype	Number of individuals of Psocoptera invertebrate morphotype	Number of individuals of Clambid beetle invertebrate morphotype	Number of individuals of Oribatid 1, like Camisia invertebrate morphotype	Number of individuals of Oribatid 2, like Opiella invertebrate morphotype	Number of individuals of Uropodid mite invertebrate morphotype
UNIT
PRECISION
RANGE OR LIST OF VALUES	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...	0, ...
DATA TYPE	integer	integer	integer	integer	integer	integer	integer	integer
MISSING DATA CODES

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COMPUTATIONAL METHODS:

Variable Name	Formula
Numbers of each morphotype are eventually divided by FWT to standardize abundances (number/gram foliage) for statistical comparison of abundances among treatments, tree species, and years.

DATE OF LAST REVIEW: May 5, 2009
DATE OF LAST ENTRY: 23 Jul 2006
STAGE OF DATA SET MANAGEMENT (dates):
RECEIVED: February 6, 2007
ENTERED: February 6, 2007
FILED ON-LINE: November 6, 2008
REVIEWED BY RESEARCHER
FILING MEDIA: magnetic media
NAME OF DOCUMENTATION FILE: lterdb155.htm
NAME OF DATA FILE: pr2002-2006ARTHROPODS-CTE.xls, Arthropods-Litter weights from arthropods July03.xls
NAME OF ON - LINE CATALOG:  Lterdbas  
RECORD #: 155
DOCUMENT TYPE: magnetic media
PRIORITY TO BE ENTERED: N/A

Rev. date of this form: 27 March 2002