Infestations of Aulacaspis yasumatsui Reduce Asexual Propagation and Transplantation Success of Cycas revoluta Plants

Marler, Thomas

doi:10.3390/horticulturae9101108

Cited by 3 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But land conversion in Guam is inconsequential to species survival because so many trees persist in the same habitats adjacent to the construction sites that are causing the land conversion. In situ conservation of these populations adjacent to the construction sites would benefit species survival without the expense and added health threat that is required to excavate, propagate, and translocate from the construction sites [39]. The greatest conservation needs for Guam and Rota are to obey the 2005 recommendations by scientists [23,24] and ensure biocontrol becomes a reality.…”

Section: Island Comparisonsmentioning

confidence: 99%

Insular Cycas micronesica Habitats Respond Similarly to Aulacaspis yasumatsui Invasion, Regardless of Co-Occurring Consumers

Marler,

Cruz

2023

Forests

Self Cite

View full text Add to dashboard Cite

The natural distribution of Cycas micronesica includes three island groups. Damage to the widespread tree from the armored scale Aulacaspis yasumatsui was initiated with the 2003 invasion of Guam and the 2007 invasion of Rota. This herbivore has threatened the unique gymnosperm species with extinction. The number and identity of co-occurring consumers are dissimilar among disjunct insular subpopulations, and six of these habitats were used to assess tree mortality trends to confirm that A. yasumatsui stands alone as the greatest threat to species persistence. Following the initial infestation outbreak of this pest into each new subpopulation, the standing seedlings and saplings were the first to be culled, the juvenile plants were the next to be culled, and then the adult trees were killed more slowly thereafter. The timing of this plant population behavior did not differ among habitats with five other consumers, three other consumers, one other consumer, or no other consumers. We have shown that A. yasumatsui acting as the sole biotic threat in an isolated subpopulation can generate a decline in survival that is as rapid as when it is acting in conjunction with up to five other consequential consumers. This armored scale is the most acute threat to C. micronesica, and adding other specialist herbivores to the scale herbivory does not alter the speed and extent of initial plant mortality.

show abstract

Section: Island Comparisonsmentioning

confidence: 99%

Insular Cycas micronesica Habitats Respond Similarly to Aulacaspis yasumatsui Invasion, Regardless of Co-Occurring Consumers

Marler,

Cruz

2023

Forests

Self Cite

View full text Add to dashboard Cite

show abstract

Threats to cycad biocultural heritage in the Amami Islands, Japan

Englehardt,

Carrasco,

Gutiérrez‐Ortega

et al. 2024

Plant Species Biology

View full text Add to dashboard Cite

This article details the significance of Cycas revoluta in the cultural ecology of the Amami Islands, Japan. Although this plant was never domesticated, multiple lines of evidence elucidate a long history of its alimentary, ethnoecological, and symbolic saliency within Amami culture. Despite this fact, Amami cycad culture remains understudied and virtually unknown outside of Japan. This article summarizes previous and current research on the social roles and environmental significance of C. revoluta in the Amami Islands, with a specific focus on current threats to these plants and the cultural ecologies that surround them, including the ongoing biological invasion by the cycad aulacaspis scale. In doing so, the article seeks to highlight a unique form of biocultural heritage and ancestral cultural traditions that are in danger of being lost. It concludes with brief observations on potential avenues for future research that can both foment interest in and promote the holistic conservation of Amami cycad culture.

show abstract

Decades of IUCN recommendations for biocontrol of invasive pest on the Guam cycad: you can lead policy-makers to conservation proposals but you cannot make them follow

Marler,

Lindström,

Terry

et al. 2024

J. Threat. Taxa

View full text Add to dashboard Cite

Guam’s cycad known as Cycas micronesica has been threatened by a coalition of invasive herbivore species, and the armored scale Aulacaspis yasumatsui has emerged as the primary threat. This lethal cycad pest invaded Guam in 2003, and the Species Survival Council of the International Union for Conservation of Nature (IUCN) began publishing recommendations addressing protection of the cycad population in 2005. Sustained epidemic mortality caused the addition of C. micronesica to the United States Endangered Species Act in 2015. The need to establish a sustainable coalition of biological control organisms has been the constant advice throughout almost two decades of recommendations, yet the decision-makers who controlled the direction of policy and funding have not responded to the advice with success. Therefore, we describe the history of publications in which the IUCN has asserted that this singular conservation action is urgently required to save the cycad species. We then summarize contemporary recommendations to address the ongoing threats to this and other insular cycad species.

show abstract

Infestations of Aulacaspis yasumatsui Reduce Asexual Propagation and Transplantation Success of Cycas revoluta Plants

Cited by 3 publications

References 26 publications

Insular Cycas micronesica Habitats Respond Similarly to Aulacaspis yasumatsui Invasion, Regardless of Co-Occurring Consumers

Insular Cycas micronesica Habitats Respond Similarly to Aulacaspis yasumatsui Invasion, Regardless of Co-Occurring Consumers

Threats to cycad biocultural heritage in the Amami Islands, Japan

Decades of IUCN recommendations for biocontrol of invasive pest on the Guam cycad: you can lead policy-makers to conservation proposals but you cannot make them follow

Contact Info

Product

Resources

About