Canopy height profile starting 1992, 1994 and 1996 of the Luquillo Forest Dynamics Plot (LFDP), Puerto Rico



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File LFDP_canopy contain the canopy heights for the Luquillo forest Dynamics plot. The first measurement started in 1992, and it was planned to measure the canopy height profile every 2 years. So far censuses starting in 1992, 1994, and 1996 have been completed. In the 1992 census the canopy height profile at points along the East and North limits of the plot were not included. In 1994 and 1996 these extra points were assessed. The National Science Foundation requires that data from projects it funds are posted on the web two years after any data set has been organized and "cleaned". The data from each census of the LFDP will be updated at intervals as each survey of the LFDP shows errors in the previous data collection. After posting on the web, researchers who are not part of the project are then welcome to use the data. Given the enormous amount of time, effort and resources required to manage the LFDP, obtain these data, and ensure data accuracy, LFDP Principal Investigators request that researchers intending to use this data comply with the requests below. Through complying with these requests we can ensure that the data are interpreted correctly, analyses are not repeated unnecessarily, beneficial collaboration between users is promoted and the Principle Investigators investment in this project is protected. Submit to the LFDP PIs a short (1 page) description of how you intend to use the data; · Invite LFDP PIs to be co-authors on any publication that uses the data in a substantial way (some PIs may decline and other LFDP scientists may need to be included); If the LFDP PIs are not co-authors, send the PIs a draft of any paper using LFDP data, so that the PIs may comment upon it; In the methods section of any publication using LFDP data, describe that data as coming from the "Luquillo Forest Dynamics Plot, part of the Luquillo Experimental Forest Long-Term Ecological Research Program"; Acknowledge in any publication using LFDP data the "The Luquillo Experimental Forest Long-Term Ecological Research Program, supported by the U.S. National Science Foundation, the University of Puerto Rico, and the International Institute of Tropical Forestry"; · Supply the LFDP PIs with 10 reprints of any publication using LFDP data. · Accept that the LFDP PIs can not guarantee that the LFDP data you intend to use, has not already been submitted for publication or published.

Date Range: 
1992-04-09 00:00:00 to 1997-04-18 00:00:00

Publication Date: 

2011-04-07 00:00:00

Additional Project roles: 

Name: Miguel C Leon Role: Data Manager
Name: Charlotte Taylor Role: Associated Researcher
Name: Diana Garcia-Montiel Role: Associated Researcher
Name: Edwin Everham Role: Associated Researcher
Name: D. Jean Lodge Role: Associated Researcher
Name: Marcheterre Fluet Role: Associated Researcher
Name: Robert B. Waide Role: Associated Researcher


The LFDP is laid out as a grid of 20 x 20 m quadrats that contain within them 16 - 5m x 5m quadrats. At each post marking the 5 x 5 m subquadrates the canopy height profile was recorded. This is a total of 6565 points when the posts that define the East and North edge of the LFDP are included (6400 points in 1992 when the edges were not included). At each grid post a 3 m pole marked at 0.5 m intervals was used to record the vegetation. Within each 0.5 m interval up to 3 m if live vegetation touched the pole then a score of 1 was entered for that interval. If no vegetation touched the pole in an interval a 0 was recorded. Above 3 m, the overall height of the canopy was estimated using a range finder. When there was no vegetation above 3 m then the top of the canopy was equal to the top of the highest 0.5 m interval on the 3 m pole in which vegetation was recorded.



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