Paper · 2021 · IOP Conference Series Earth and Environmental Science

Application of Principal Component Analysis in distinguishing three species of ‘jernang’ (Daemonorops spp.)

R Andini; L A Yanti; S Rasnovi; et al.

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Open access · cc-by

Abstract

Abstract The province of Aceh at the northern tip of Sumatra has a total area of 5,75 million hectares. Its forest resources are considerably extensive as 60% of its total land area is still considered as ‘forest area’. Non-Timber Forest Products (NTFP) are defined as any wild plant and animal products harvested from forests, e.g., ‘ jernang ’ or dragon blood ( Daemonorops spp.). It is classified as one of the valuable NTFP’s harvested from the forests in Aceh. Its morphological features resemble that of rattan ( Calamus spp.), both of which belong to Aracaceae. The red resin of Daemonorops spp. is highly valued in Chinese medicine and possesses anti-inflammatory, anti-tumor, and anti-hemostatic properties. Almost 112 species of Daemonorops spp. exist. However, only 10% produces the red resin. Daemonorops draco , D. mattanensis , D. didymophylla are considered to have significant economic values. Over the past decade, a farmer living in central and western Aceh has cultivated dragon blood plants in small farms and sold the seedlings. In this study, the morphological variations of dragon blood (N=11) from Kuta Panang in central Aceh were assessed, and the Principal Component Analyses (PCA) were applied in order to distinguish the three species. Up to 92% of total variations were significantly explained with PC1, while the remaining were explained with PC2. Among the three species measured with PCA, Daemonorops draco or known as super ‘ jernang ’, appeared to have more distinctive morphological characteristics, e.g., fruit-, and stem diameter, as well as a number of fruit per trunk. These characteristics would contribute to better yield and field performance.

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Claims 2

Method / resourceobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

In the PCA of morphological variation among three jernang species, PC1 significantly explained up to 92% of total variation.

Taxon
Daemonorops spp.Calamust0
Outcome
total variationse0
Value
92%e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Calamus
Calamus · Taxon · picture from its Wikimedia Commons categoryRuB (Ruddy Bénézet) · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Daemonorops spp.”

✓ located verbatim in the source · title, characters 90–106 · show in text ↑
e0

“Up to 92% of total variations were significantly explained with PC1”

✓ located verbatim in the source · abstract, characters 1264–1331 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Among the three species measured with PCA, Daemonorops draco appeared to have more distinctive morphological characteristics.

Taxon
Daemonorops dracoCalamus dracoe1
Outcome
morphological characteristicse0
Direction
more distinctivee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Calamus draco
Calamus draco · TaxonJudgefloro · CC0 · Wikimedia Commons ↗

Verbatim

e0

“appeared to have more distinctive morphological characteristics”

✓ located verbatim in the source · abstract, characters 1470–1533 · show in text ↑
e1

“Daemonorops draco or known as super”

✓ located verbatim in the source · abstract, characters 1421–1456 · show in text ↑