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Palm frond damage from herbivory in Biodiversity and Ecosystem Function in Tropical Agriculture (BEFTA) plots, Kandista and Ujun Tanjung estates, Indonesia

Data comprise counts of damage to palm fronds in mature oil palm (2013-2015), and mature and replanted oil palm (2016-2017) plots as part of a large-scale ecological experiment programme (the Biodiversity and Ecosystem Function in Tropical Agriculture project, established in 2013). Herbivory was measured 17 times in total (every 3-4 months) between April 2013 and August 2017. Eighteen plots were examined across three estates - plots in Ujung Tanjung and Kandista estates were planted in 1987 to 1992 and are mature or over-mature oil palm, while Libo plots (2016-2017 data only) were replanted in 2014. Plots were organised in triplets; in Ujung Tanjung and Kandista, for each triplet one plot was assigned to each of three vegetation treatments: Reduced vegetation cover, normal vegetation management and enhanced vegetation cover. The data contain damage estimated in three ways: by eye for the whole crown, by eye for the 17th frond, and by image processing for 20 leaflets of the 17th frond. Full details about this dataset can be found at https://doi.org/10.5285/c2fbd22c-1ce9-4435-b4b0-e333addef346

Simple

Date (Publication)
2020-02-25
Identifier
https://catalogue.ceh.ac.uk/id/c2fbd22c-1ce9-4435-b4b0-e333addef346
Identifier
doi: / 10.5285/c2fbd22c-1ce9-4435-b4b0-e333addef346
Other citation details
Eycott, A.E., Turner, E.C., Luke, S.H., Advento, A.D. (2020). Palm frond damage from herbivory in Biodiversity and Ecosystem Function in Tropical Agriculture (BEFTA) plots, Kandista and Ujun Tanjung estates, Indonesia. NERC Environmental Information Data Centre 10.5285/c2fbd22c-1ce9-4435-b4b0-e333addef346
Point of contact
  Nord University - Eycott, A.
https://orcid.org/0000-0002-8609-1091
Author
  Nord University - Eycott, A.E.
https://orcid.org/0000-0002-8609-1091
Author
  University of Cambridge - Turner, E.C.
https://orcid.org/0000-0003-2715-2234
Author
  University of Cambridge - Luke, S.H.
https://orcid.org/0000-0002-8335-5960
Author
  SMART Research Institute - Advento, A.D.
Custodian
  NERC EDS Environmental Information Data Centre
Publisher
  NERC Environmental Information Data Centre
Owner
  University of Cambridge
Access constraints
otherRestrictions Other restrictions
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no limitations
Use constraints
otherRestrictions Other restrictions
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This resource is available under the terms of the Open Government Licence
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otherRestrictions Other restrictions
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© Natural Environment Research Council
Use constraints
otherRestrictions Other restrictions
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© University of Cambridge Department of Zoology
Use constraints
otherRestrictions Other restrictions
Other constraints
If you reuse this data, you should cite: Eycott, A.E., Turner, E.C., Luke, S.H., Advento, A.D. (2020). Palm frond damage from herbivory in Biodiversity and Ecosystem Function in Tropical Agriculture (BEFTA) plots, Kandista and Ujun Tanjung estates, Indonesia. NERC Environmental Information Data Centre https://doi.org/10.5285/c2fbd22c-1ce9-4435-b4b0-e333addef346
Spatial representation type
textTable Text, table
Metadata language
EnglishEnglish
Character set
utf8 UTF8
Topic category
  • Biota
  • Environment
  • Economy
  • Farming
Begin date
2013-04-01
End date
2017-08-31
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S
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W
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Unique resource identifier
WGS 84
Distribution format
  • Comma-separated values (CSV) ()

Distributor
  NERC EDS Environmental Information Data Centre
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dataset Dataset
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dataset

Conformance result

Date (Publication)
2010-12-08
Statement
At each recording session, three palms were selected at random from within experimental plots. Random palm selection was done using the rnd function in excel before visiting the field, as each palm in the experimental plots has a unique identifying tag. In the replanted stands where palms are not tagged, the randomisation was done by counting steps from the corner of the plot, again using the rnd function in excel. First the damage to the crown form herbivory was estimated visually from the ground. Then, counting from the youngest fully-opened frond, the 17th frond in the crown of the palm was cut and caught in a white cloth. Frond 17 represents a middle-aged frond (aged between 8.5 and 9 months) in mature palms and is commonly used by the oil palm industry as a standard to measure herbivory and herbivore load. The damage to the frond (in percent) was estimated visually. Then twenty paired leaflets, spaced evenly along the frond, were cut, placed flat on a white board and photographed (using a Nikon D90). Photography and visual damage estimates were always carried out by the same person, from the same angle (bottom left), to reduce sampling bias. Photographs were pre-processed to remove noise and converted to binary images in Microsoft Paint. The total leaflet area was then measured in Fiji (https://fiji.sc/). A second image was prepared in Microsoft Paint, with all herbivory damage 'filled in', such that the leaflets appeared to be intact. Where leaflet tips were missing, a conservative estimate for the leaflet tip was drawn in, based on the length of neighbouring leaflets. This second image was measured in Fiji in the same way and the percent of the leaflet area consumed by herbivores was calculated. Basic data checks were carried out (checks for impossible values, such as an increase in leaf area after processing or extreme discrepancy between visual estimate and image processing values).
File identifier
c2fbd22c-1ce9-4435-b4b0-e333addef346 XML
Metadata language
EnglishEnglish
Character set
ISO/IEC 8859-1 (also known as Latin 1) 8859 Part 1
Hierarchy level
dataset Dataset
Hierarchy level name
dataset
Date stamp
2025-11-05T08:32:47
Metadata standard name
UK GEMINI
Metadata standard version
2.3
Point of contact
  NERC EDS Environmental Information Data Centre
Lancaster Environment Centre, Library Avenue, Bailrigg , Lancaster , LA1 4AP , UK
https://eidc.ac.uk/
 
 

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