Burrowing activity of coconut rhinoceros beetle on Guam cycads
| Autor: | Frankie C Matanane, Thomas E. Marler, L. Irene Terry |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Short Communication Population Endangered species Rhinoceros host shift 01 natural sciences crb 03 medical and health sciences cycas micronesica Botany education Cycad lcsh:QH301-705.5 030304 developmental biology 0303 health sciences education.field_of_study biology Host (biology) starch Burrow biology.organism_classification oryctes rhinoceros Cycas micronesica lcsh:Biology (General) Oryctes Other General Agricultural and Biological Sciences adaptive radiation 010606 plant biology & botany ecological fitting hypothesis |
| Zdroj: | Communicative & Integrative Biology, Vol 13, Iss 1, Pp 74-83 (2020) Communicative & Integrative Biology article-version (VoR) Version of Record |
| ISSN: | 1942-0889 |
| Popis: | Guam’s established population of non-native coconut rhinoceros beetle (CRB, Oryctes rhinoceros L.) began creating burrows in stem apices of several cycad species in a managed garden. We conducted an island-wide survey to determine the spatial patterns of CRB burrowing of stems of in situ Cycas micronesica. We also measured starch of healthy and unhealthy coconut leaf tissue and compared this with starch of cycad stem tissue. The starch concentration of the central unexpanded leaf in healthy Philippine coconut trees was ≈90 mg·g−1, and that of unhealthy Guam coconut trees was ≈40 mg·g−1. The starch concentration of the tissue within the CRB burrow locations on C. micronesica trees was 145 mg·g−1. Burrowing of C. micronesica was restricted to female CRB adults and was found throughout the full latitudinal gradient of Guam. Our findings indicate Guam’s unhealthy coconut trees are no longer nutrient-dense, and the female CRB population may have exhibited a phylogenetically distant host shift to the abundant C. micronesica plants for a starch-rich diet within the concepts of the ‘ecological fitting’ hypothesis. We add proximity to coconut tree habitats as a new threat to Guam’s endangered C. micronesica population. |
| Databáze: | OpenAIRE |
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