Coconut Leaf Age and Coconut Rhinoceros Beetle Herbivory Influence Leaflet Nutrients, Metals, and Lignin

The coconut rhinoceros beetle (CRB, Oryctes rhinoceros L.) is a serious pest of coconut (Cocos nucifera L.) in many tropical regions, however the influences of CRB herbivory on the coconut leaf chemistry are unknown. This limits our ability to predict the afterlife decomposition dynamics of the dama...

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Main Author: Thomas E. Marler
Format: Article
Language:English
Published: MDPI AG 2018-06-01
Series:Horticulturae
Subjects:
Online Access:http://www.mdpi.com/2311-7524/4/2/9
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author Thomas E. Marler
author_facet Thomas E. Marler
author_sort Thomas E. Marler
collection DOAJ
description The coconut rhinoceros beetle (CRB, Oryctes rhinoceros L.) is a serious pest of coconut (Cocos nucifera L.) in many tropical regions, however the influences of CRB herbivory on the coconut leaf chemistry are unknown. This limits our ability to predict the afterlife decomposition dynamics of the damaged coconut leaf litter. Mature green and senesced leaflet tissues were collected from coconut trees on the island of Guam, where coconut is native and CRB is invasive. Mineral, metal, and lignin concentrations were quantified to determine the nutrient limitations and the litter quality traits. Nitrogen was increased and the elements that are not resorbed during leaf senescence were decreased by the CRB damage. The important litter stoichiometric traits carbon/nitrogen and lignin/nitrogen were decreased by the CRB damage. The results indicate that CRB herbivory may limit green leaf nutrition in Guam’s soils and increase the senesced leaf litter decomposition speed and nutrient turnover rates.
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spelling doaj.art-4322b83e3fcd47c8b57ba093ac648b012022-12-21T23:59:13ZengMDPI AGHorticulturae2311-75242018-06-0142910.3390/horticulturae4020009horticulturae4020009Coconut Leaf Age and Coconut Rhinoceros Beetle Herbivory Influence Leaflet Nutrients, Metals, and LigninThomas E. Marler0College of Natural and Applied Sciences, University of Guam, UOG Station, Mangilao, GU 96923, USAThe coconut rhinoceros beetle (CRB, Oryctes rhinoceros L.) is a serious pest of coconut (Cocos nucifera L.) in many tropical regions, however the influences of CRB herbivory on the coconut leaf chemistry are unknown. This limits our ability to predict the afterlife decomposition dynamics of the damaged coconut leaf litter. Mature green and senesced leaflet tissues were collected from coconut trees on the island of Guam, where coconut is native and CRB is invasive. Mineral, metal, and lignin concentrations were quantified to determine the nutrient limitations and the litter quality traits. Nitrogen was increased and the elements that are not resorbed during leaf senescence were decreased by the CRB damage. The important litter stoichiometric traits carbon/nitrogen and lignin/nitrogen were decreased by the CRB damage. The results indicate that CRB herbivory may limit green leaf nutrition in Guam’s soils and increase the senesced leaf litter decomposition speed and nutrient turnover rates.http://www.mdpi.com/2311-7524/4/2/9Cocos nuciferalitter qualityOryctes rhinocerosresorption efficiency
spellingShingle Thomas E. Marler
Coconut Leaf Age and Coconut Rhinoceros Beetle Herbivory Influence Leaflet Nutrients, Metals, and Lignin
Horticulturae
Cocos nucifera
litter quality
Oryctes rhinoceros
resorption efficiency
title Coconut Leaf Age and Coconut Rhinoceros Beetle Herbivory Influence Leaflet Nutrients, Metals, and Lignin
title_full Coconut Leaf Age and Coconut Rhinoceros Beetle Herbivory Influence Leaflet Nutrients, Metals, and Lignin
title_fullStr Coconut Leaf Age and Coconut Rhinoceros Beetle Herbivory Influence Leaflet Nutrients, Metals, and Lignin
title_full_unstemmed Coconut Leaf Age and Coconut Rhinoceros Beetle Herbivory Influence Leaflet Nutrients, Metals, and Lignin
title_short Coconut Leaf Age and Coconut Rhinoceros Beetle Herbivory Influence Leaflet Nutrients, Metals, and Lignin
title_sort coconut leaf age and coconut rhinoceros beetle herbivory influence leaflet nutrients metals and lignin
topic Cocos nucifera
litter quality
Oryctes rhinoceros
resorption efficiency
url http://www.mdpi.com/2311-7524/4/2/9
work_keys_str_mv AT thomasemarler coconutleafageandcoconutrhinocerosbeetleherbivoryinfluenceleafletnutrientsmetalsandlignin