Status: 

Ongoing

Title

Canopy Trimming Experiment (CTE) plant seedling measurements
Summary

Short name: 

LUQMetadata143

Data set ID: 

143

Abstract: 

Seedlings were measured before and after treatments to determine how alterations in canopy openness and detritus affect seedling densities and life histories (growth, mortality, recruitment). It was predicted that plots experiencing canopy openness with detritus removed would have the quickest increase in seedlings (recruitment and growth), especially of early successional (light demanding) species, such as Cecropia. Seedlings in plots that received no canopy manipulation but had detritus deposited is predicted to have near-total mortality initially (low light and high physical inhibition due to detritus). Treatment plots experiencing both canopy manipulation and addition of detritus would initially experience near-total mortality, with some light demanding seedlings establishing and growing through detritus with time.

Dates
Date Range: 
2003-06-05 00:00:00 to 2015-09-28 00:00:00

Publication Date: 

2011-06-07 00:00:00
People

Owner/Creator: 

Contact: 

Additional Project roles: 

Name: Eda Melendez-Colom Role: Data Manager
Name: Aaron Shiels Role: Associated Researcher
Name: Jess Zimmerman Role: Associated Researcher
Name: Grizelle Gonzalez Role: Associated Researcher
Methodology

Methods: 

In each of the five non-destructive (plant) subplots, one 1 x 3.5 m measurement area was established at a random location that was at least 75% boulder-free to measure seedlings (all vascular life forms <1 cm dbh at 1.3 m height). We identify each seedling to species, including trees, shrubs, herbs, vines, palms, orchids, and ferns. Seedlings ≥10 cm tall received a permanent tag, and height and diameter (measured above the root crown) was measured. Seedlings ≤10 cm were identified to species (if possible), counted, and this number was recorded, but were not tagged. Plot cover and litter depth were also measured in the 1 x 3.5 m area. Cover categories included:  litter, rock, bare soil, live trunk, dead trunk, and grass. Canopy photographs were taken with a Nikon Coolpix 4500 camera at 1 m height above, and in the center, of each seedling plot, as well as the corners and center of each 20 x 20 m plot. Photos were analyzed using Gap Light Analyzer, Version 2. Canopy cover and an index of light for each photo were determined.

Instrumentation: 

Nikon Coolpix 4500 camera

Gap Light Analyzer Version 2

Status: 

Ongoing

Time Period: 

Long-Term
Categories