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:

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DATA SET IDENTIFIER: Temperature and humidity in the LFDP (40 points)

PROJECT TITLE: Luquillo Forest Dynamics Plot (LFDP) (Spatial distribution of organisms on the LFDP)

PROJECT DESCRIPTION: The processes that determine the plant species diversity and structure of tropical forest are still uncertain despite many years of investigation. A tropical forest characteristically has few common species and many rare species, with conspecifics often widely distributed throughout the forest. The potential for inter and intra-specific interactions are numerous, and it is difficult to determine which factors maintain species diversity or how rare species survive in the population. Factors that we believe contribute to tropical forest structure and composition include the physical environment and past history of the forest, species-specific physiological requirements for light, nutrients and water necessary for growth, survival and reproduction, and pathogens and herbivores. Despite the substantial amount of information available about these factors, we are still unable to accurately model the current composition of tropical forest or to predict its future response to human and natural disturbances.

 The Luquillo Forest Dynamics Plot (LFDP), previously known as the Hurricane Recovery Plot (Zimmerman et. al. 1994) and the Luquillo long-term ecological research grid (Soil Survey 1995), is a 16-ha forest plot (SW corner 18° 20' N, 65° 49' W) located near El Verde Field Station. The plot is 500 m N-S and 320 m E-W and is divided into 400 20 x 20 m quadrats, with each quadrat sub divided into 16 5 x 5 m sub-quadrats. The field station and LFDP are in the Luquillo Mountains of northeastern Puerto Rico, approximately 35 km southeast of San Juan. Information from the LFDP contributes to the efforts of the Center for Tropical Forest Science (CTFS, Smithsonian) network of large tropical forest plots in order to improve our understanding of tropical forest and to predict its future. Large plots (typically 50 ha) are required to cover local environmental variation, include sufficient numbers of individuals of both the common and rare species, and to determine plant spatial relationships. Population monitoring is required over many years to elucidate tree life histories, species interactions and population changes in order to determine the forest response to environmental changes and disturbance.

 The LFDP is unique among the CTFS sites as it has a history of land use disturbance and also hurricane damage. These two disturbance types interact and influence the community dynamics and species composition in the LFDP. The Northern area (approximately two thirds of the plot) was disturbed by tree felling and farming until 1934 when the land was purchased by United States Department of Agriculture, Forest Service. The Southern third was not farmed and only suffered relatively light disturbance from selective logging. Aerial photographs taken in 1936 show differences in canopy cover caused by the patterns of land use history. Clear patterns in the distribution of some species reflect this land use history (Thompson et. al. in press). The distribution of species as a result of the land use history interacts with hurricane disturbance, as those species colonizing the northern part of the LFDP are more susceptible to hurricane damage (Zimmerman et. al. 1994). Major hurricanes struck the forest area of the LFDP in 1928 and 1932 and after a 66 year period with relatively little hurricane damage, the forest was struck by Hurricane Hugo in 1989 and Hurricane Georges in 1998, both hurricanes causing significant damage.

Monitoring of long-term dynamics of animal and plant populations and associated abiotic variables at 40 points on the LFDP

LTER CORE AREAS: (Annotate all that apply)

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

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 1	On-Line Filename 2	Starting Date	Periodicity of sample	End Date
1	LFDP grid point 0306 data starting on February 2000	03060200.txt	03060200.dtf	2/1/2000	every half hour	6/1/2000
2	LFDP grid point 0309 data starting on February 2000	03090200.txt	03090200.dtf	2/1/2000	every half hour	6/1/2000
3	LFDP grid point 0312 data starting on February 2000	03120200.txt	03120200.dtf	2/1/2000	every half hour	6/1/2000
4	LFDP grid point 0318 data starting on February 2000	03180200.txt	03180200.dtf	2/1/2000	every half hour	6/1/2000
5	LFDP grid point 0321 data starting on February 2000	03210200.txt	03210200.dtf	2/1/2000	every half hour	6/1/2000
6	LFDP grid point 0324 data starting on February 2000	03240200.txt	03240200.dtf	2/1/2000	every half hour	6/1/2000
7	LFDP grid point 0603 data starting on February 2000	06030200.txt	06030200.dtf	2/1/2000	every half hour	6/1/2000
8	LFDP grid point 0606 data starting on February 2000	06060200.txt	06060200.dtf	2/1/2000	every half hour	6/1/2000
9	LFDP grid point 0609 data starting on February 2000	06090200.txt	06090200.dtf	2/1/2000	every half hour	6/1/2000
10	LFDP grid point 0612 data starting on February 2000	06120200.txt	06120200.dtf	2/1/2000	every half hour	6/1/2000
11	LFDP grid point 0615 data starting on February 2000	06150200.txt	06150200.dtf	2/1/2000	every half hour	6/1/2000
12	LFDP grid point 0618 data starting on February 2000	06180200.txt	06180200.dtf	2/1/2000	every half hour	6/1/2000
13	LFDP grid point 0621 data starting on February 2000	06210200.txt	06210200.dtf	2/1/2000	every half hour	6/1/2000
14	LFDP grid point 0624 data starting on February 2000	06240200.txt	06240200.dtf	2/1/2000	every half hour	6/1/2000
15	LFDP grid point 0903 data starting on February 2000	09030200.txt	09030200.dtf	2/1/2000	every half hour	6/1/2000
16	LFDP grid point 0906 data starting on February 2000	09060200.txt	09060200.dtf	2/1/2000	every half hour	6/1/2000
17	LFDP grid point 0909 data starting on February 2000	09090200.txt	09090200.dtf	2/1/2000	every half hour	6/1/2000
18	LFDP grid point 0912 data starting on February 2000	09120200.txt	09120200.dtf	2/1/2000	every half hour	6/1/2000
19	LFDP grid point 0915 data starting on February 2000	09150200.txt	09150200.dtf	2/1/2000	every half hour	6/1/2000
20	LFDP grid point 0918 data starting on February 2000	09180200.txt	09180200.dtf	2/1/2000	every half hour	6/1/2000
21	LFDP grid point 0921 data starting on February 2000	09210200.txt	09210200.dtf	2/1/2000	every half hour	6/1/2000
22	LFDP grid point 0924 data starting on February 2000	09240200.txt	09240200.dtf	2/1/2000	every half hour	6/1/2000
23	LFDP grid point 1203 data starting on February 2000	12030200.txt	12030200.dtf	2/1/2000	every half hour	6/1/2000
24	LFDP grid point 1206 data starting on February 2000	12060200.txt	12060200.dtf	2/1/2000	every half hour	6/1/2000
25	LFDP grid point 1209 data starting on February 2000	12090200.txt	12090200.dtf	2/1/2000	every half hour	6/1/2000
26	LFDP grid point 1212 data starting on February 2000	12120200.txt	12120200.dtf	2/1/2000	every half hour	6/1/2000
27	LFDP grid point 1215 data starting on February 2000	12150200.txt	12150200.dtf	2/1/2000	every half hour	6/1/2000
28	LFDP grid point 1218 data starting on February 2000	12180200.txt	12180200.dtf	2/1/2000	every half hour	6/1/2000
29	LFDP grid point 1221 data starting on February 2000	12210200.txt	12210200.dtf	2/1/2000	every half hour	6/1/2000
30	LFDP grid point 1224 data starting on February 2000	12240200.txt	12240200.dtf	2/1/2000	every half hour	6/1/2000
31	LFDP grid point 1503 data starting on February 2000	15030200.txt	15030200.dtf	2/1/2000	every half hour	6/1/2000
32	LFDP grid point 1506 data starting on February 2000	15060200.txt	15060200.dtf	2/1/2000	every half hour	6/1/2000
33	LFDP grid point 1509 data starting on February 2000	15090200.txt	15090200.dtf	2/1/2000	every half hour	6/1/2000
34	LFDP grid point 1512 data starting on February 2000	15120200.txt	15120200.dtf	2/1/2000	every half hour	6/1/2000
35	LFDP grid point 1515 data starting on February 2000	15150200.txt	15150200.dtf	2/1/2000	every half hour	6/1/2000
36	LFDP grid point 1518 data starting on February 2000	15180200.txt	15180200.dtf	2/1/2000	every half hour	6/1/2000
37	LFDP grid point 1521 data starting on February 2000	15210200.txt	15210200.dtf	2/1/2000	every half hour	6/1/2000
38	LFDP grid point 1524 data starting on February 2000	15240200.txt	15240200.dtf	2/1/2000	every half hour	6/1/2000
39	LFDP grid point 0315 data starting on February 2000	03150202.txt	03150202.dtf	2/1/2000	every half hour	6/1/2002
40	LFDP grid point 0303 data starting on May 2000	03030500.txt	03030500.dtf	5/1/2000	every half hour	1/1/2001
41	LFDP grid point 0303 data starting on May 2000	0303m500.txt	0303m500.dtf	5/1/2000	every half hour	1/1/2001
42	LFDP grid point 0306 data starting on May 2000	03060500.txt	03060500.dtf	5/1/2000	every half hour	1/1/2001
43	LFDP grid point 0309 data starting on May 2000	03090500.txt	03090500.dtf	5/1/2000	every half hour	1/1/2001
44	LFDP grid point 0312 data starting on May 2000	03120500.txt	03120500.dtf	5/1/2000	every half hour	1/1/2001
45	LFDP grid point 0315 data starting on May 2000	03150500.txt	03150500.dtf	5/1/2000	every half hour	1/1/2001
46	LFDP grid point 0318 data starting on May 2000	03180500.txt	03180500.dtf	5/1/2000	every half hour	1/1/2001
47	LFDP grid point 0321 data starting on May 2000	03210500.txt	03210500.dtf	5/1/2000	every half hour	1/1/2001
48	LFDP grid point 0324 data starting on May 2000	03240500.txt	03240500.dtf	5/1/2000	every half hour	1/1/2001
49	LFDP grid point 0603 data starting on May 2000	06030500.txt	06030500.dtf	5/1/2000	every half hour	1/1/2001
50	LFDP grid point 0606 data starting on May 2000	06060500.txt	06060500.dtf	5/1/2000	every half hour	1/1/2001
51	LFDP grid point 0609 data starting on May 2000	06090500.txt	06090500.dtf	5/1/2000	every half hour	1/1/2001
52	LFDP grid point 0612 data starting on May 2000	06120500.txt	06120500.dtf	5/1/2000	every half hour	1/1/2001
53	LFDP grid point 0615 data starting on May 2000	06150500.txt	06150500.dtf	5/1/2000	every half hour	1/1/2001
54	LFDP grid point 0618 data starting on May 2000	06180500.txt	06180500.dtf	5/1/2000	every half hour	1/1/2001
55	LFDP grid point 0621 data starting on May 2000	06210500.txt	06210500.dtf	5/1/2000	every half hour	1/1/2001
56	LFDP grid point 0624 data starting on May 2000	06240500.txt	06240500.dtf	5/1/2000	every half hour	1/1/2001
57	LFDP grid point 0903 data starting on May 2000	09030500.txt	09030500.dtf	5/1/2000	every half hour	1/1/2001
58	LFDP grid point 0906 data starting on May 2000	09060500.txt	09060500.dtf	5/1/2000	every half hour	1/1/2001
59	LFDP grid point 0909 data starting on May 2000	09090500.txt	09090500.dtf	5/1/2000	every half hour	1/1/2001
60	LFDP grid point 0912 data starting on May 2000	09120500.txt	09120500.dtf	5/1/2000	every half hour	1/1/2001
61	LFDP grid point 0915 data starting on May 2000	09150500.txt	09150500.dtf	5/1/2000	every half hour	1/1/2001
62	LFDP grid point 0918 data starting on May 2000	09180500.txt	09180500.dtf	5/1/2000	every half hour	1/1/2001
63	LFDP grid point 0921 data starting on May 2000	09210500.txt	09210500.dtf	5/1/2000	every half hour	1/1/2001
64	LFDP grid point 0924 data starting on May 2000	09240500.txt	09240500.dtf	5/1/2000	every half hour	1/1/2001
65	LFDP grid point 1203 data starting on May 2000	12030500.txt	12030500.dtf	5/1/2000	every half hour	1/1/2001
66	LFDP grid point 1206 data starting on May 2000	12060500.txt	12060500.dtf	5/1/2000	every half hour	1/1/2001
67	LFDP grid point 1209 data starting on May 2000	12090500.txt	12090500.dtf	5/1/2000	every half hour	1/1/2001
68	LFDP grid point 1212 data starting on May 2000	12120500.txt	12120500.dtf	5/1/2000	every half hour	1/1/2001
69	LFDP grid point 1215 data starting on May 2000	12150500.txt	12150500.dtf	5/1/2000	every half hour	1/1/2001
70	LFDP grid point 1218 data starting on May 2000	12180500.txt	12180500.dtf	5/1/2000	every half hour	1/1/2001
71	LFDP grid point 1221 data starting on May 2000	12210500.txt	12210500.dtf	5/1/2000	every half hour	1/1/2001
72	LFDP grid point 1224 data starting on May 2000	12240500.txt	12240500.dtf	5/1/2000	every half hour	1/1/2001
73	LFDP grid point 1503 data starting on May 2000	15030500.txt	15030500.dtf	5/1/2000	every half hour	1/1/2001
74	LFDP grid point 1506 data starting on May 2000	15060500.txt	15060500.dtf	5/1/2000	every half hour	1/1/2001
75	LFDP grid point 1509 data starting on May 2000	15090500.txt	15090500.dtf	5/1/2000	every half hour	1/1/2001
76	LFDP grid point 1512 data starting on May 2000	15120500.txt	15120500.dtf	5/1/2000	every half hour	1/1/2001
77	LFDP grid point 1515 data starting on May 2000	15150500.txt	15150500.dtf	5/1/2000	every half hour	1/1/2001
78	LFDP grid point 1518 data starting on May 2000	15180500.txt	15180500.dtf	5/1/2000	every half hour	1/1/2001
79	LFDP grid point 1521 data starting on May 2000	15210500.txt	15210500.dtf	5/1/2000	every half hour	1/1/2001
80	LFDP grid point 1524 data starting on May 2000	15240500.txt	15240500.dtf	5/1/2000	every half hour	1/1/2001
81	LFDP grid point 1215 data starting on December 2000	12151200.txt	12151200.dtf	12/1/2000	every half hour	4/16/2001
82	LFDP grid point 0303 data starting on February 2001	03030201.txt	03030201.dtf	2/1/2001	every half hour	6/1/2001
83	LFDP grid point 0306 data starting on February 2001	03060201.txt	03060201.dtf	2/1/2001	every half hour	6/1/2001
84	LFDP grid point 0309 data starting on February 2001	03090201.txt	03090201.dtf	2/1/2001	every half hour	6/1/2001
85	LFDP grid point 0312 data starting on February 2001	03120201.txt	03120201.dtf	2/1/2001	every half hour	6/1/2001
86	LFDP grid point 0315 data starting on February 2001	03150201.txt	03150201.dtf	2/1/2001	every half hour	6/1/2001
87	LFDP grid point 0318 data starting on February 2001	03180201.txt	03180201.dtf	2/1/2001	every half hour	6/1/2001
88	LFDP grid point 0321 data starting on February 2001	03210201.txt	03210201.dtf	2/1/2001	every half hour	6/1/2001
89	LFDP grid point 0324 data starting on February 2001	03240201.txt	03240201.dtf	2/1/2001	every half hour	6/1/2001
90	LFDP grid point 0603 data starting on February 2001	06030201.txt	06030201.dtf	2/1/2001	every half hour	6/1/2001
91	LFDP grid point 0606 data starting on February 2001	06060201.txt	06060201.dtf	2/1/2001	every half hour	6/1/2001
92	LFDP grid point 0609 data starting on February 2001	06090201.txt	06090201.dtf	2/1/2001	every half hour	6/1/2001
93	LFDP grid point 0612 data starting on February 2001	06120201.txt	06120201.dtf	2/1/2001	every half hour	6/1/2001
94	LFDP grid point 0615 data starting on February 2001	06150201.txt	06150201.dtf	2/1/2001	every half hour	6/1/2001
95	LFDP grid point 0618 data starting on February 2001	06180201.txt	06180201.dtf	2/1/2001	every half hour	6/1/2001
96	LFDP grid point 0621 data starting on February 2001	06210201.txt	06210201.dtf	2/1/2001	every half hour	6/1/2001
97	LFDP grid point 0624 data starting on February 2001	06240201.txt	06240201.dtf	2/1/2001	every half hour	6/1/2001
98	LFDP grid point 0903 data starting on February 2001	09030201.txt	09030201.dtf	2/1/2001	every half hour	6/1/2001
99	LFDP grid point 0906 data starting on February 2001	09060201.txt	09060201.dtf	2/1/2001	every half hour	6/1/2001
100	LFDP grid point 0909 data starting on February 2001	09090201.txt	09090201.dtf	2/1/2001	every half hour	6/1/2001
101	LFDP grid point 0912 data starting on February 2001	09120201.txt	09120201.dtf	2/1/2001	every half hour	6/1/2001
102	LFDP grid point 0915 data starting on February 2001	09150201.txt	09150201.dtf	2/1/2001	every half hour	6/1/2001
103	LFDP grid point 0918 data starting on February 2001	09180201.txt	09180201.dtf	2/1/2001	every half hour	6/1/2001
104	LFDP grid point 0921 data starting on February 2001	09210201.txt	09210201.dtf	2/1/2001	every half hour	6/1/2001
105	LFDP grid point 0924 data starting on February 2001	09240201.txt	09240201.dtf	2/1/2001	every half hour	6/1/2001
106	LFDP grid point 1203 data starting on February 2001	12030201.txt	12030201.dtf	2/1/2001	every half hour	6/1/2001
107	LFDP grid point 1206 data starting on February 2001	12060201.txt	12060201.dtf	2/1/2001	every half hour	6/1/2001
108	LFDP grid point 1209 data starting on February 2001	12090201.txt	12090201.dtf	2/1/2001	every half hour	6/1/2001
109	LFDP grid point 1212 data starting on February 2001	12120201.txt	12120201.dtf	2/1/2001	every half hour	6/1/2001
110	LFDP grid point 1215 data starting on February 2001	12150201.txt	12150201.dtf	2/1/2001	every half hour	6/1/2001
111	LFDP grid point 1218 data starting on February 2001	12180201.txt	12180201.dtf	2/1/2001	every half hour	6/1/2001
112	LFDP grid point 1221 data starting on February 2001	12210201.txt	12210201.dtf	2/1/2001	every half hour	6/1/2001
113	LFDP grid point 1224 data starting on February 2001	12240201.txt	12240201.dtf	2/1/2001	every half hour	6/1/2001
114	LFDP grid point 1503 data starting on February 2001	15030201.txt	15030201.dtf	2/1/2001	every half hour	6/1/2001
115	LFDP grid point 1506 data starting on February 2001	15060201.txt	15060201.dtf	2/1/2001	every half hour	6/1/2001
116	LFDP grid point 1509 data starting on February 2001	15090201.txt	15090201.dtf	2/1/2001	every half hour	6/1/2001
117	LFDP grid point 1512 data starting on February 2001	15120201.txt	15120201.dtf	2/1/2001	every half hour	6/1/2001
118	LFDP grid point 1515 data starting on February 2001	15150201.txt	15150201.dtf	2/1/2001	every half hour	6/1/2001
119	LFDP grid point 1518 data starting on February 2001	15180201.txt	15180201.dtf	2/1/2001	every half hour	6/1/2001
120	LFDP grid point 1521 data starting on February 2001	15210201.txt	15210201.dtf	2/1/2001	every half hour	6/1/2001
121	LFDP grid point 1524 data starting on February 2001	15240201.txt	15240201.dtf	2/1/2001	every half hour	6/1/2001
122	LFDP grid point 0303 data starting on February 2001	0303m201.txt	0303m201.dtf	2/1/2001	every half hour	6/1/2002
123	LFDP grid point 0303 data starting on May 2001	03030501.txt	03030501.dtf	5/1/2001	every half hour	1/1/2002
124	LFDP grid point 0303 data starting on May 2001	0303m501.txt	0303m501.dtf	5/1/2001	every half hour	1/1/2002
125	LFDP grid point 0306 data starting on May 2001	03060501.txt	03060501.dtf	5/1/2001	every half hour	1/1/2002
126	LFDP grid point 0309 data starting on May 2001	03090501.txt	03090501.dtf	5/1/2001	every half hour	1/1/2002
127	LFDP grid point 0312 data starting on May 2001	03120501.txt	03120501.dtf	5/1/2001	every half hour	1/1/2002
128	LFDP grid point 0315 data starting on May 2001	03150501.txt	03150501.dtf	5/1/2001	every half hour	1/1/2002
129	LFDP grid point 0318 data starting on May 2001	03180501.txt	03180501.dtf	5/1/2001	every half hour	1/1/2002
130	LFDP grid point 0321 data starting on May 2001	03210501.txt	03210501.dtf	5/1/2001	every half hour	1/1/2002
131	LFDP grid point 0324 data starting on May 2001	03240501.txt	03240501.dtf	5/1/2001	every half hour	1/1/2002
132	LFDP grid point 0603 data starting on May 2001	06030501.txt	06030501.dtf	5/1/2001	every half hour	1/1/2002
133	LFDP grid point 0606 data starting on May 2001	06060501.txt	06060501.dtf	5/1/2001	every half hour	1/1/2002
134	LFDP grid point 0609 data starting on May 2001	06090501.txt	06090501.dtf	5/1/2001	every half hour	1/1/2002
135	LFDP grid point 0612 data starting on May 2001	06120501.txt	06120501.dtf	5/1/2001	every half hour	1/1/2002
136	LFDP grid point 0615 data starting on May 2001	06150501.txt	06150501.dtf	5/1/2001	every half hour	1/1/2002
137	LFDP grid point 0618 data starting on May 2001	06180501.txt	06180501.dtf	5/1/2001	every half hour	1/1/2002
138	LFDP grid point 0621 data starting on May 2001	06210501.txt	06210501.dtf	5/1/2001	every half hour	1/1/2002
139	LFDP grid point 0624 data starting on May 2001	06240501.txt	06240501.dtf	5/1/2001	every half hour	1/1/2002
140	LFDP grid point 0903 data starting on May 2001	09030501.txt	09030501.dtf	5/1/2001	every half hour	1/1/2002
141	LFDP grid point 0906 data starting on May 2001	09060501.txt	09060501.dtf	5/1/2001	every half hour	1/1/2002
142	LFDP grid point 0909 data starting on May 2001	09090501.txt	09090501.dtf	5/1/2001	every half hour	1/1/2002
143	LFDP grid point 0912 data starting on May 2001	09120501.txt	09120501.dtf	5/1/2001	every half hour	1/1/2002
144	LFDP grid point 0915 data starting on May 2001	09150501.txt	09150501.dtf	5/1/2001	every half hour	1/1/2002
145	LFDP grid point 0918 data starting on May 2001	09180501.txt	09180501.dtf	5/1/2001	every half hour	1/1/2002
146	LFDP grid point 0921 data starting on May 2001	09210501.txt	09210501.dtf	5/1/2001	every half hour	1/1/2002
147	LFDP grid point 0924 data starting on May 2001	09240501.txt	09240501.dtf	5/1/2001	every half hour	1/1/2002
148	LFDP grid point 1203 data starting on May 2001	12030501.txt	12030501.dtf	5/1/2001	every half hour	1/1/2002
149	LFDP grid point 1206 data starting on May 2001	12060501.txt	12060501.dtf	5/1/2001	every half hour	1/1/2002
150	LFDP grid point 1209 data starting on May 2001	12090501.txt	12090501.dtf	5/1/2001	every half hour	1/1/2002
151	LFDP grid point 1212 data starting on May 2001	12120501.txt	12120501.dtf	5/1/2001	every half hour	1/1/2002
152	LFDP grid point 1218 data starting on May 2001	12180501.txt	12180501.dtf	5/1/2001	every half hour	1/1/2002
153	LFDP grid point 1221 data starting on May 2001	12210501.txt	12210501.dtf	5/1/2001	every half hour	1/1/2002
154	LFDP grid point 1224 data starting on May 2001	12240501.txt	12240501.dtf	5/1/2001	every half hour	1/1/2002
155	LFDP grid point 1503 data starting on May 2001	15030501.txt	15030501.dtf	5/1/2001	every half hour	1/1/2002
156	LFDP grid point 1509 data starting on May 2001	15090501.txt	15090501.dtf	5/1/2001	every half hour	1/1/2002
157	LFDP grid point 1512 data starting on May 2001	15120501.txt	15120501.dtf	5/1/2001	every half hour	1/1/2002
158	LFDP grid point 1515 data starting on May 2001	15150501.txt	15150501.dtf	5/1/2001	every half hour	1/1/2002
159	LFDP grid point 1518 data starting on May 2001	15180501.txt	15180501.dtf	5/1/2001	every half hour	1/1/2002
160	LFDP grid point 1521 data starting on May 2001	15210501.txt	15210501.dtf	5/1/2001	every half hour	1/1/2002
161	LFDP grid point 1524 data starting on May 2001	15240501.txt	15240501.dtf	5/1/2001	every half hour	1/1/2002
162	LFDP grid point 0303 data starting on January 2002	03030102.txt	03030102.dtf	1/1/2002	every half hour	6/1/2002
163	LFDP grid point 0303 data starting on January 2002	0303h0102.txt	0303h0102.dtf	1/1/2002	every half hour	6/1/2002
164	LFDP grid point 0306 data starting on January 2002	03060102.txt	03060102.dtf	1/1/2002	every half hour	6/1/2002
165	LFDP grid point 0309 data starting on January 2002	03090102.txt	03090102.dtf	1/1/2002	every half hour	6/1/2002
166	LFDP grid point 0312 data starting on January 2002	03120102.txt	03120102.dtf	1/1/2002	every half hour	6/1/2002
167	LFDP grid point 0303 data starting on February 2002	03030200 .txt	03030200.dtf	2/1/2002	every half hour	6/1/2000
168	LFDP grid point 0315 data starting on February 2002	03150200.txt	03150200.dtf	2/1/2002	every half hour	6/1/2000
169	LFDP grid point 0312 data starting on February 2002	03120202.txt	03120202.dtf	2/1/2002	every half hour	6/1/2002
170	LFDP grid point 0318 data starting on February 2002	03180202.txt	03180202.dtf	2/1/2002	every half hour	6/1/2002
171	LFDP grid point 0321 data starting on February 2002	03210202.txt	03210202.dtf	2/1/2002	every half hour	6/1/2002
172	LFDP grid point 0324 data starting on February 2002	03240202.txt	03240202.dtf	2/1/2002	every half hour	6/1/2002
173	LFDP grid point 0603 data starting on February 2002	06030202.txt	06030202.dtf	2/1/2002	every half hour	6/1/2002
174	LFDP grid point 0606 data starting on February 2002	06060202.txt	06060202.dtf	2/1/2002	every half hour	6/1/2002
175	LFDP grid point 0609 data starting on February 2002	06090202.txt	06090202.dtf	2/1/2002	every half hour	6/1/2002
176	LFDP grid point 0612 data starting on February 2002	06120202.txt	06120202.dtf	2/1/2002	every half hour	6/1/2002
177	LFDP grid point 0615 data starting on February 2002	06150202.txt	06150202.dtf	2/1/2002	every half hour	6/1/2002
178	LFDP grid point 0618 data starting on February 2002	06180202.txt	06180202.dtf	2/1/2002	every half hour	6/1/2002
179	LFDP grid point 0621 data starting on February 2002	06210202.txt	06210202.dtf	2/1/2002	every half hour	6/1/2002
180	LFDP grid point 0624 data starting on February 2002	06240202.txt	06240202.dtf	2/1/2002	every half hour	6/1/2002
181	LFDP grid point 0903 data starting on February 2002	09030202.txt	09030202.dtf	2/1/2002	every half hour	6/1/2002
182	LFDP grid point 0906 data starting on February 2002	09060202.txt	09060202.dtf	2/1/2002	every half hour	6/1/2002
183	LFDP grid point 0912 data starting on February 2002	09120202.txt	09120202.dtf	2/1/2002	every half hour	6/1/2002
184	LFDP grid point 0915 data starting on February 2002	09150202.txt	09150202.dtf	2/1/2002	every half hour	6/1/2002
185	LFDP grid point 0918 data starting on February 2002	09180202.txt	09180202.dtf	2/1/2002	every half hour	6/1/2002
186	LFDP grid point 0921 data starting on February 2002	09210202.txt	09210202.dtf	2/1/2002	every half hour	6/1/2002
187	LFDP grid point 0924 data starting on February 2002	09240202.txt	09240202.dtf	2/1/2002	every half hour	6/1/2002
188	LFDP grid point 1203 data starting on February 2002	12030202.txt	12030202.dtf	2/1/2002	every half hour	6/1/2002
189	LFDP grid point 1206 data starting on February 2002	12060202.txt	12060202.dtf	2/1/2002	every half hour	6/1/2002
190	LFDP grid point 1209 data starting on February 2002	12090202.txt	12090202.dtf	2/1/2002	every half hour	6/1/2002
191	LFDP grid point 1218 data starting on February 2002	12180202.txt	12180202.dtf	2/1/2002	every half hour	6/1/2002
192	LFDP grid point 1221 data starting on February 2002	12210202.txt	12210202.dtf	2/1/2002	every half hour	6/1/2002
193	LFDP grid point 1224 data starting on February 2002	12240202.txt	12240202.dtf	2/1/2002	every half hour	6/1/2002
194	LFDP grid point 1503 data starting on February 2002	15030202.txt	15030202.dtf	2/1/2002	every half hour	6/1/2002
195	LFDP grid point 1506 data starting on February 2002	15060202.txt	15060202.dtf	2/1/2002	every half hour	6/1/2002
196	LFDP grid point 1509 data starting on February 2002	15090202.txt	15090202.dtf	2/1/2002	every half hour	6/1/2002
197	LFDP grid point 1512 data starting on February 2002	15120202.txt	15120202.dtf	2/1/2002	every half hour	6/1/2002
198	LFDP grid point 1515 data starting on February 2002	15150202.txt	15150202.dtf	2/1/2002	every half hour	6/1/2002
199	LFDP grid point 1518 data starting on February 2002	15180202.txt	15180202.dtf	2/1/2002	every half hour	6/1/2002
200	LFDP grid point 1524 data starting on February 2002	15240202.txt	15240202.dtf	2/1/2002	every half hour	6/1/2002
201	LFDP grid point 0606 data starting on June 2002	06060602.txt	06060602.dtf	6/1/2002	every half hour	9/18/2002
202	LFDP grid point 0303 data starting on June 2002	0303h0602.txt	0303h0602.dtf	6/1/2002	every half hour	1/1/2003
203	LFDP grid point 0303 data starting on June 2002	0303l0602.txt	0303l0602.dtf	6/1/2002	every half hour	1/1/2003
204	LFDP grid point 0306 data starting on June 2002	03060602.txt	03060602.dtf	6/1/2002	every half hour	1/1/2003
205	LFDP grid point 0309 data starting on June 2002	03090602.txt	03090602.dtf	6/1/2002	every half hour	1/1/2003
206	LFDP grid point 0312 data starting on June 2002	03120602.txt	03120602.dtf	6/1/2002	every half hour	1/1/2003
207	LFDP grid point 0315 data starting on June 2002	03150602.txt	03150602.dtf	6/1/2002	every half hour	1/1/2003
208	LFDP grid point 0318 data starting on June 2002	03180602.txt	03180602.dtf	6/1/2002	every half hour	1/1/2003
209	LFDP grid point 0321 data starting on June 2002	03210602.txt	03210602.dtf	6/1/2002	every half hour	1/1/2003
210	LFDP grid point 0324 data starting on June 2002	03240602.txt	03240602.dtf	6/1/2002	every half hour	1/1/2003
211	LFDP grid point 0603 data starting on June 2002	06030602.txt	06030602.dtf	6/1/2002	every half hour	1/1/2003
212	LFDP grid point 0609 data starting on June 2002	06090602.txt	06090602.dtf	6/1/2002	every half hour	1/1/2003
213	LFDP grid point 0612 data starting on June 2002	06120602.txt	06120602.dtf	6/1/2002	every half hour	1/1/2003
214	LFDP grid point 0615 data starting on June 2002	06150602.txt	06150602.dtf	6/1/2002	every half hour	1/1/2003
215	LFDP grid point 0618 data starting on June 2002	06180602.txt	06180602.dtf	6/1/2002	every half hour	1/1/2003
216	LFDP grid point 0621 data starting on June 2002	06210602.txt	06210602.dtf	6/1/2002	every half hour	1/1/2003
217	LFDP grid point 0624 data starting on June 2002	06240602.txt	06240602.dtf	6/1/2002	every half hour	1/1/2003
218	LFDP grid point 0903 data starting on June 2002	09030602.txt	09030602.dtf	6/1/2002	every half hour	1/1/2003
219	LFDP grid point 0906 data starting on June 2002	09060602.txt	09060602.dtf	6/1/2002	every half hour	1/1/2003
220	LFDP grid point 0909 data starting on June 2002	09090602.txt	09090602.dtf	6/1/2002	every half hour	1/1/2003
221	LFDP grid point 0912 data starting on June 2002	09120602.txt	09120602.dtf	6/1/2002	every half hour	1/1/2003
222	LFDP grid point 0915 data starting on June 2002	09150602.txt	09150602.dtf	6/1/2002	every half hour	1/1/2003
223	LFDP grid point 0918 data starting on June 2002	09180602.txt	09180602.dtf	6/1/2002	every half hour	1/1/2003
224	LFDP grid point 0921 data starting on June 2002	09210602.txt	09210602.dtf	6/1/2002	every half hour	1/1/2003
225	LFDP grid point 0924 data starting on June 2002	09240602.txt	09240602.dtf	6/1/2002	every half hour	1/1/2003
226	LFDP grid point 1203 data starting on June 2002	12030602.txt	12030602.dtf	6/1/2002	every half hour	1/1/2003
227	LFDP grid point 1206 data starting on June 2002	12060602.txt	12060602.dtf	6/1/2002	every half hour	1/1/2003
228	LFDP grid point 1209 data starting on June 2002	12090602.txt	12090602.dtf	6/1/2002	every half hour	1/1/2003
229	LFDP grid point 1212 data starting on June 2002	12120602.txt	12120602.dtf	6/1/2002	every half hour	1/1/2003
230	LFDP grid point 1215 data starting on June 2002	12150602.txt	12150602.dtf	6/1/2002	every half hour	1/1/2003
231	LFDP grid point 1218 data starting on June 2002	12180602.txt	12180602.dtf	6/1/2002	every half hour	1/1/2003
232	LFDP grid point 1221 data starting on June 2002	12210602.txt	12210602.dtf	6/1/2002	every half hour	1/1/2003
233	LFDP grid point 1224 data starting on June 2002	12240602.txt	12240602.dtf	6/1/2002	every half hour	1/1/2003
234	LFDP grid point 1503 data starting on June 2002	15030602.txt	15030602.dtf	6/1/2002	every half hour	1/1/2003
235	LFDP grid point 1506 data starting on June 2002	15060602.txt	15060602.dtf	6/1/2002	every half hour	1/1/2003
236	LFDP grid point 1509 data starting on June 2002	15090602.txt	15090602.dtf	6/1/2002	every half hour	1/1/2003
237	LFDP grid point 1512 data starting on June 2002	15120602.txt	15120602.dtf	6/1/2002	every half hour	1/1/2003
238	LFDP grid point 1515 data starting on June 2002	15150602.txt	15150602.dtf	6/1/2002	every half hour	1/1/2003
239	LFDP grid point 1518 data starting on June 2002	15180602.txt	15180602.dtf	6/1/2002	every half hour	1/1/2003
240	LFDP grid point 1521 data starting on June 2002	15210602.txt	15210602.dtf	6/1/2002	every half hour	1/1/2003
241	LFDP grid point 1524 data starting on June 2002	15240602.txt	15240602.dtf	6/1/2002	every half hour	1/1/2003

Note: Files produced by the Boxcar Pro 4.0 software have the file extension .dtf (see data table above).

RESEARCH LOCATION: Luquillo Forest Dynamics Plot (LFDP), Luquillo Experimental Forest (LEF)

INVESTIGATORS:

PRINCIPAL INVESTIGATORS	E-MAIL address
Robert B. Waide	rwaide@lternet.edu

OTHER RESEARCHERS	E-MAIL address

CONTACT PERSONS	E-MAIL address	Phone Number (Include area code)
Robert B. Waide	rwaide@lternet.edu	(505)272-7311

SOURCE OF FUNDING (SPONSOR): NSF - LEF LTER

DATA SET ABSTRACT: This data set represents environmental variables collected to help interpret the distribution of plants and animals on the LFDP. Data are collected at each of 40 points designated as sampling points for animal studies. Measurements include temperature, dew point and absolute and relative humidity.

There are 40 groups of data files, one for each of the 40 points in the LFDP. The first four digits for each file in a group are the same and reflect the grid point identifier in the LFDP. Thus, grid point 03,03 will have data files beginning 0303. The last four digits reflect the month and year of the first data point in the file (e.g., 03030200 contains data from point 03,03 that was collected beginning in February 2000). For point 03,03 only, two sensors were deployed, one at 1.0 m and the other at 0.5 m. Names of data files for the high sensor contain the letters "hi" after the grid point identifier, and names of data files for the low sensor contain the letters "lo" after the grid point identifier. Data from the entire data set were exported to Excel books, two books for each grid point, one containing temperature data in degrees Centigrade and the other containing data for relative humidity. Names for these books reflect the grid cell identifier as well as whether the data are for temperature (0303T) or relative humidity (0303RH). Data from different collection periods are separated on different sheets in the Excel books, with pages labeled with the month and year of the first data point on the sheet.

DATA SET METHODS: Measurements are collected using automated data loggers (HOBO Pro Series Temp, RH © 1998 ONSET) placed 50 cm above the ground on posts marking each of the 40 sampling points of the Luquillo Forest Dynamics Plot. Each HOBO is placed inside an inverted beverage cup (white plastic, 16 oz). The cups are suspended by string so that the sensor opening rests 50 cm above the ground. During the initial sampling period (February 6-May 15, 2000), placement of the cups was irregular. All cups were corrected on May 15, 2000, so that sensors were a measured 50 cm above the ground. However, given the uneven nature of the substrate in the LFDP, placement of the sensors could vary ± 10 cm from the average ground level around the sampling point. Data were downloaded from the sensors using a HOBO Shuttle © ONSET Corporation and transferred to a computer using Boxcar Pro 4.0 software © ONSET Computer Corporation 1999 (P.O. Box 3450, Pocasset, MA 02559-3450; phone, 508/759-9500; email, loggerhelp@onsetcomp.com). Subsequent maintenance of the data was performed using the same software. HOBO Pro Series sensors, HOBO Shuttles, and Boxcar Pro 4.0 software is available from Forestry Suppliers, part numbers H08-032-08, H09-003-08, and BC3_7-ON. Copies of users manuals for the HOBO Pro Series Sensors, the HOBO Shuttle, and a copy of the Boxcar 4.0 Pro software is filed with the Luquillo LTER data management office. An online copy of this users manuals can be found at: ftp://ftp.onsetcomp.com/Public/Hobo_StowAway/manuals/. More information about the specifications can be found at: http://www.onsetcomp.com/Products/Product_Pages/HOBO_H08/hobo_pro_specs.html.

All sensors were launched using the same computer before being placed in the field. Sensors were set to begin operation at 0100 hours on May 6, 2000. Before placement in the field, each sensor was tested for battery strength and overall functionality. In addition, all sensors were exposed to standard conditions to compare initial calibrations. Sensors were placed inside a refrigerator, which was then allowed gradually to approach room temperature. Results of this calibration test are included in the data set with the following identifying file names.

Note: Files produced by the Boxcar Pro 4.0 software have the file extension .dtf (see data table above).

REFERENCES:
Soil Survey Staff. 1995. Order I soil survey of the Luquillo Long-term Ecological Research grid, Puerto Rico. USDA-NRCS.

Thompson, J., N. Brokaw, J. K. Zimmerman, R. B. Waide, E. M. Everham, III, D. J. Lodge, C. M. Taylor, D.García-Montiel, and M. Fluet. 2002. Land use history, environment, and tree composition in a tropical forest. Ecological Applications 12(5):1344-1363.

Zimmerman, J. K., E. M. Everham III, R. B. Waide, D. J. Lodge, C. M. Taylor, and N. V. L. Brokaw. 1994. Responses of tree species to hurricane winds in subtropical wet forest in Puerto Rico: implications of tropical tree life histories. Journal of Ecology 82:911-922.

CROSS-REFERENCES (other data sets related to this one): LTERDBAS46: Elevation at grid points on the Luquillo Forest Dynamics Plot (LFDP), Puerto Rico; LTERDB47: Physical environment of the Luquillo Forest Dynamics Plot (LFDP), Puerto Rico, LTERDB57: Tree damage by Hurricane Hugo at the Luquillo Forest Dynamics Plot (LFDP), Puerto Rico, LTERDB60: Tree Map for Census at the Luquillo Forest Dynamics Plot (LFDP), Puerto Rico; LTERDB62:  Canopy height profile starting 1992, 1994 and 1996 of the Luquillo Forest Dynamics Plot (LFDP), Puerto Rico; LTERDB118: Species names and codes of the Luquillo Forest Dynamics Plot (LFDP), Puerto Rico; LTERDB119: Census of species, diameter and location at the Luquillo Forest Dynamics Plot (LFDP), Puerto Rico; LTERDB129: Temperature and humidity in the LFDP (40 points)

SAMPLE LOCATION: N/A

STORAGE SITES (of data files): LUQ LTER Data Manager's Cabinet DM333-01, Drawer #4

INVESTIGATOR'S ASSIGNED KEYWORDS: temperature, humidity, dew point, gradient, abiotic, environment, meteorology, weather, climate, LFDP

LEF LTER OFFICIAL KEYWORDS (See table): EL VERDE, LFDP (EV Big Grid), MOIST, TABONUCO, DISTURBANCE, HURRICANE, ENVIRONMENTAL VARIABLES, POPULATION DYNAMICS , PRIMARY PRODUCTION, PEER REVIEWED JOURNAL

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: The LFDP is within the Luquillo Experimental Forest (LEF, established in 1956) which is coterminous with the Caribbean National Forest and covers 11,330-ha of the Luquillo mountains (Brown et al. 1983). There are four different forest types within the LEF including tabonuco, colorado, palm-brake, and dwarf forest. These forest types are associated with different soil types and are roughly stratified by elevation (Brown et al. 1983). The LFDP lies within the tabonuco forest that is named after a dominant tree, Dacryodes excelsa Vahl (Burseraceae). Tabonuco forest develops best on low, protected, well-drained ridges below 600 m a.s.l. Mean canopy height in tabonuco forest is about 20 m, with tallest trees to c. 35m. Few trees in the LFDP exceed 1 m DBH. The forest in Puerto Rico is subject to hurricane damage and canopy height is lower, and canopy structure is broken, in the years after hurricanes.

CLIMATE

The climate is classified as tropical montane in Walsh’s (1996) tropical climate system, and as subtropical wet in the Holdridge life zone system (Ewel and Whitmore 1973). Annual rainfall at El Verde averages just over 3500 mm yr^-1 (1975-1999). On average there is no month with <200 mm of rain, although a drier season occurs from January through April. The highest rainfall recorded at El Verde between 1975 and 2001 (370 mm in less than 12 hours) fell on 17 April 1997. There are also severe droughts, such as in 1994, when less than 70% of the average annual rain fell, and many small streams in the forest stopped flowing entirely for two months. Daily average maximum air temperature is 25.2 ^°C, minimum is 20.5 ^°C, and average is 22.8 ^°C (Brown et al. 1983, and also see weather data on this web site). Severe hurricanes struck the LFDP forest area in 1928, 1932, 1989 and 1998.

LFDP TOPOGRAPHY AND SOIL.

Topography on the LFDP has northwest-running drainages producing steep northeast and southwest-facing slopes, with an elevation across the plot which ranges from 333 to 428 m asl. The mean slope of the plot is 17% but ranges from 3 to 60%. Soils were formed in residual volcanic ash that fell in the ocean to form volcaniclastic sandstones and siltstones, which were subsequently uplifted (F. Scatena pers. comm.). Soils are dominated by old, deeply weathered kaolinitic Oxisols (Zarzal) and Ultisols (Cristal), and young, less-developed Entisols (Coloso and Fluvaquents) and Inceptisols (Preito) in stream channels. Zarzal, Cristal and Prieto are deep clay soils, while Coloso and Fluvequents are formed from alluvium in the stream channels (Soil Survey Staff 1995).

Geographical positional system (GPS) Coordinates for each location:

location	latitude	longitude
South West Corner of plot	18° 19" 26' North	065° 49" 3' West

VARIABLES (ATTRIBUTES):

File Name or # above (all in which the variable appears)	All	All	All	All
Abbreviation (as it appears on the data file)	Date	Time	Temperature (*F) c:1	Temperature (*C) c:1
NAME	Date of measurement	Time of measurement	Standard-resolution temperature	Standard-resolution temperature
DEFINITION midity (%)	Date of measurement in a mm/dd/yy format	Time of measurement in a hh:mm:ss.s format (e.g., 10:12:04.0)	Air temperature in standard-resolution mode given in Faharenheit	Air temperature in standard-resolution mode given in Celsius
UNIT	N/A	N/A	fahrenheit	celsius
PRECISION	N/A	N/A	±0.9°F	±0.5°C
RANGE OR LIST OF VALUES
DATA TYPE	date	time	Numeric decimal	Numeric decimal
MISSING DATA CODES	no record	no record	blank	blank

VARIABLES (ATTRIBUTES):

File Name or # above (all in which the variable appears)	All	All	ll	All
Abbreviation (as it appears on the data file)	High-Res Temp (*F) c:1 2	High-Res Temp (*C) c:1 2	Dew Point (*F) c:1 3	Dew Point (*C) c:1 3
NAME	High-resolution temperature	High-resolution temperature	Dew point in Faharenheit	Dew point in Celsius
DEFINITION	High-resolution temperature in Faharenheit	High-resolution temperature in Celsius	DEW POINT is the temperature at which the wet gaseous atmosphere can not be held in equilibrium in its gaseous form only.	DEW POINT is the temperature at which the wet gaseous atmosphere can not be held in equilibrium in its gaseous form only.
UNIT	fahrenheit	celsius	fahrenheit	celsius
PRECISION	±0.33° at 70°F	±0.2° at 21°C	±0.33° at 70°F	±0.2° at 21°C
RANGE OR LIST OF VALUES
DATA TYPE	Numeric decimal	Numeric decimal	Numeric decimal	Numeric decimal
MISSING DATA CODES	blank	blank

VARIABLES (ATTRIBUTES):

File Name or # above (all in which the variable appears)	All	All
Abbreviation (as it appears on the data file)	Abs Humidity (gm/M3) c:1 3	RH (%) c:3
NAME	Absolute humidity	Relative humidity
DEFINITION	ABSOLUTE HUMIDITY is the water vapor concentration in the air.	The RELATIVE HUMIDITY is defined as the ratio of the partial pressure vapor to saturation vapor pressure at a given temperature. By measuring the relative humidity, we compare the actual quantity of water vapor to the maximum quantity of water vapor which can be found in these conditions of ambient temperature and pressure.
UNIT	gramsPerSquareMeter	Per cent
PRECISION		±3% over the range of 0 to 50°C (32° to 122°F). ±4% RH in condensing environments
RANGE OR LIST OF VALUES		0, ..., 100
DATA TYPE	Numeric decimal	Numeric decimal
MISSING DATA CODES

COMPUTATIONAL METHODS:

Variable Name	Formula

FOR DATA MANAGER USE ONLY

DATE OF LAST REVIEW: February 16, 2006
DATE OF LAST ENTRY: June 2002
STAGE OF DATA SET MANAGEMENT (dates):
RECEIVED: May 15, 2000
ENTERED: June 10, 2003
FILED ON-LINE: May 23, 2005
REVIEWED BY RESEARCHER: May 24, 2005
FILING MEDIA:
NAME OF DOCUMENTATION FILE: lterdb129.htm
NAME OF ON - LINE CATALOG: LTERDBAS
RECORD #: 129
DOCUMENT TYPE: magnetic media
PRIORITY TO BE ENTERED: N/A

Rev. date of this form: 8 June 2001 / 20 May 2003