Acanthaster planci Outbreak: Decline in Coral Health, Coral Size Structure Modification and Consequences for Obligate Decapod Assemblages

Although benthic motile invertebrate communities encompass the vast majority of coral reef diversity, their response to habitat modification has been poorly studied. A variety of benthic species, particularly decapods, provide benefits to their coral host enabling them to cope with environmental stressors, and as a result benefit the overall diversity of coral-associated species. However, little is known about how invertebrate assemblages associated with corals will be affected by global perturbations, (either directly or indirectly via their coral host) or their consequences for ecosystem resilience. Analysis of a ten year dataset reveals that the greatest perturbation at Moorea over this time was an outbreak of the corallivorous sea star Acanthaster planci from 2006 to 2009 impacting habitat health, availability and size structure of Pocillopora spp. populations and highlights a positive relationship between coral head size and survival. We then present the results of a mensurative study in 2009 conducted at the end of the perturbation (A. planci outbreak) describing how coral-decapod communities change with percent coral mortality for a selected coral species, Pocillopora eydouxi. The loss of coral tissue as a consequence of A. planci consumption led to an increase in rarefied total species diversity, but caused drastic modifications in community composition driven by a shift from coral obligate to non-obligate decapod species. Our study highlights that larger corals left with live tissue in 2009, formed a restricted habitat where coral obligate decapods, including mutualists, could subsist. We conclude that the size structure of Pocillopora populations at the time of an A. planci outbreak may greatly condition the magnitude of coral mortality as well as the persistence of local populations of obligate decapods

Unmet Needs and Care Delivery Gaps Among Rural Cancer Survivors

Community-based healthcare delivery systems frequently lack cancer-specific survivorship support services. This leads to a burden of unmet needs that is magnified in rural areas. Using sequential mixed methods we assessed unmet needs among rural cancer survivors diagnosed between 2015 and 2021. The Supportive Care Needs Survey (SCNS) assessed 5 domains; Physical and Daily Living, Psychological, Support and Supportive Services, Sexual, and Health Information. Needs were analyzed across domains by cancer type. Survey respondents were recruited for qualitative interviews to identify care gaps. Three hundred and sixty two surveys were analyzed. Participants were 85% White (n = 349) 65% (n = 234) female and averaged 2.03 years beyond cancer diagnosis. Nearly half (49.5%) of respondents reported unmet needs, predominantly in physical, psychological, and health information domains. Needs differed by stage of disease. Eleven interviews identified care gap themes regarding; Finding Support and Supportive Services and Health Information regarding Care Delivery and Continuity of Care. Patients experience persistent unmet needs after a cancer diagnosis across multiple functional domains. Access to community-based support services and health information is lacking. Community based resources are needed to improve access to care for long-term cancer survivors

Assessing the efficacy and impact of management of an invasive species in a protected area: Poa annua on sub-Antarctic Macquarie Island

Plant eradication is difficult, particularly in remote, protected areas. The Southern Ocean Islands are very isolated and highly protected, but the flora contains many alien plants. Small restricted populations have been eradicated, but eradication of established species has proven difficult. A better understanding of the efficacy of control methods at sub-Antarctic temperatures and their off-target impacts may increase eradication success. With interest in controlling non-native Poa annua in the region, we aimed to determine if physical and chemical methods can control P.\ua0annua (the sub-Antarctic biotype) in sub-Antarctic conditions and examined their impact on native plants. We quantified the effectiveness of physical control methods on P.\ua0annua in\ua0situ on sub-Antarctic Macquarie Island through field-based experiments and assessed their selectivity on P.\ua0annua compared with native grasses. We also quantified the effectiveness of several herbicides on P.\ua0annua at sub-Antarctic temperatures and assessed their selectivity on native grasses. Of the four physical disturbance methods tested, none effectively reduced P.\ua0annua cover as one-off treatments. Of the herbicide treatments, glyphosate and trifloxysulfuron sodium were effective and were less damaging to native grass species, indicating potential selectivity. Physical control was of limited effectiveness, but did not affect native species richness. An integrated weed management programme utilising the strategic use of selective herbicides with follow-up chemical and physical intervention may balance control and biodiversity outcomes. This research highlights the importance of site-specific testing of control methods and understanding off-target impacts of control when managing alien plant species in protected areas