The nuanced nature of mesic refugia in arid landscapes: a tale of two peas.

BACKGROUND AND AIMS: Understanding how genetic diversity is distributed and maintained within species is a central tenet of evolutionary and conservation biology, yet is understudied in arid regions of the globe. In temperate, glaciated environments, high genetic diversity in plant species is frequently found in refugial areas, which are often associated with southern non-glaciated landscapes. In arid, unglaciated environments, landscape features providing mesic conditions are likely to be refugia, although our understanding needs more refinement in these biomes. We test whether refugia and nuclear diversity hotspots occur in high-elevation, topographically complex areas for co-distributed shrubs (Petalostylis labicheoides and Indigofera monophylla; Fabaceae) in the ancient, arid Pilbara bioregion of north-western Australia. METHODS: We conducted extensive sampling of the Pilbara (>1400 individuals from 62 widespread populations) to detect patterns in nuclear diversity and structure based on 13-16 microsatellite loci. Evidence of historical refugia was investigated based on patterns of diversity in three non-coding chloroplast (cp) sequence regions for approx. 240 individuals per species. Haplotype relationships were defined with median-joining networks and maximum likelihood phylogenetic trees. KEY RESULTS: We found cpDNA evidence for a high-elevation refugium in P. labicheoides but not for I. monophylla that instead exhibited extraordinary haplotype diversity and evidence for persistence across a widespread area. Nuclear diversity hotspots occurred in, but were not exclusive to, high-elevation locations and extended to adjacent, low-elevation riparian areas in both species. CONCLUSIONS: Phylogeographic refugia in arid environments may occur in high-elevation areas for some species but not all, and may be influenced by species-specific traits: a mesic montane refugium in P. labicheoides could be related to its preference for growth in water-gaining areas, while a lack of such evidence in I. monophylla could be related to maintenance of cpDNA diversity in a large soil seed bank and dynamic evolutionary history. Mesic environments created by the intersection of topographically complex landscapes with riparian zones can be contemporary reservoirs of genetic diversity in arid landscapes.

Evaluation of a Web-Based Training Model for Family Peer Advocates in Children's Mental Health.

OBJECTIVE: The aim of this study was to compare knowledge gains from a new online training program with gains from an existing in-person training program for family peer advocates. METHODS: Data were used from a pre-post study of individuals who enrolled in the Web-based Parent Empowerment Program training; 144 participants completed the training and pre-post tests, and 140 were admitted to the analyses. Knowledge was assessed with 34 questions, 29 of which were common to the online and in-person trainings. Pre-post knowledge scores were available from the in-person training. RESULTS: Statistically significant gains in knowledge were found with both the 34 questions and the 29 questions common to both trainings. Knowledge gains across the two training models did not differ. CONCLUSIONS: Data on knowledge gains from this accessible, affordable online model show promise for training the growing and important workforce of family peer advocates.

Sustainability of an Evidence-Based Practice in Community Mental Health Agencies Serving Children.

OBJECTIVE: The authors documented rates of sustained use of an evidence-based practice following training sponsored by New York State (NYS), and they identified clinician characteristics related to sustained use. METHODS: Clinicians (N=89) who were employed in licensed NYS Office of Mental Health agencies serving children and adolescents and who were trained to proficiency in Managing and Adapting Practice (MAP) in 2016 were contacted between 9 and 18 months later and asked whether they were still using (users) or had stopped using (nonusers) MAP and their reason for doing so. RESULTS: Responses were received from 57% of trainees and of those, 80% reported continued use of MAP. Score on the appeal subscale of the Evidence-Based Practices Attitude Scale (EBPAS) was the only significant difference between users and nonusers. CONCLUSIONS: Most clinicians reported sustained use of MAP. The EBPAS appeal subscale can be used to identify clinicians who are likely to discontinue use.

Scaling up evidence-based practices for children and families in New York State: toward evidence-based policies on implementation for state mental health systems.

Dissemination of innovations is widely considered the sine qua non for system improvement. At least two dozen states are rolling out evidence-based mental health practices targeted at children and families using trainings, consultations, webinars, and learning collaboratives to improve quality and outcomes. In New York State (NYS) a group of researchers, policymakers, providers, and family support specialists have worked in partnership since 2002 to redesign and evaluate the children's mental health system. Five system strategies driven by empirically based practices and organized within a state-supported infrastructure have been used in the child and family service system with more than 2,000 providers: (a) business practices, (b) use of health information technologies in quality improvement, (c) specific clinical interventions targeted at common childhood disorders, (d) parent activation, and (e) quality indicator development. The NYS system has provided a laboratory for naturalistic experiments. We describe these initiatives, key findings and challenges, lessons learned for scaling, and implications for creating evidence-based implementation policies in state systems.

Genetic and palaeo-climatic evidence for widespread persistence of the coastal tree species Eucalyptus gomphocephala (Myrtaceae) during the Last Glacial Maximum.

BACKGROUND AND AIMS: Few phylogeographic studies have been undertaken of species confined to narrow, linear coastal systems where past sea level and geomorphological changes may have had a profound effect on species population sizes and distributions. In this study, a phylogeographic analysis was conducted of Eucalyptus gomphocephala (tuart), a tree species restricted to a 400 × 10 km band of coastal sand-plain in south west Australia. Here, there is little known about the response of coastal vegetation to glacial/interglacial climate change, and a test was made as to whether this species was likely to have persisted widely through the Last Glacial Maximum (LGM), or conforms to a post-LGM dispersal model of recovery from few refugia. METHODS: The genetic structure over the entire range of tuart was assessed using seven nuclear (21 populations; n = 595) and four chloroplast (24 populations; n = 238) microsatellite markers designed for eucalypt species. Correlative palaeodistribution modelling was also conducted based on five climatic variables, within two LGM models. KEY RESULTS: The chloroplast markers generated six haplotypes, which were strongly geographically structured (GST = 0·86 and RST = 0·75). Nuclear microsatellite diversity was high (overall mean HE 0·75) and uniformly distributed (FST = 0·05), with a strong pattern of isolation by distance (r(2) = 0·362, P = 0·001). Distribution models of E. gomphocephala during the LGM showed a wide distribution that extended at least 30 km westward from the current distribution to the palaeo-coastline. CONCLUSIONS: The chloroplast and nuclear data suggest wide persistence of E. gomphocephala during the LGM. Palaeodistribution modelling supports the conclusions drawn from genetic data and indicates a widespread westward shift of E. gomphocephala onto the exposed continental shelf during the LGM. This study highlights the importance of the inclusion of complementary, non-genetic data (information on geomorphology and palaeoclimate) to interpret phylogeographic patterns.

Signatures of diversifying selection at EST-SSR loci and association with climate in natural Eucalyptus populations.

Understanding the environmental parameters that drive adaptation among populations is important in predicting how species may respond to global climatic changes and how gene pools might be managed to conserve adaptive genetic diversity. Here, we used Bayesian FST outlier tests and allele-climate association analyses to reveal two Eucalyptus EST-SSR loci as strong candidates for diversifying selection in natural populations of a southwestern Australian forest tree, Eucalyptus gomphocephala (Myrtaceae). The Eucalyptus homolog of a CONSTANS-like gene was an FST outlier, and allelic variation showed significant latitudinal clinal associations with annual and winter solar radiation, potential evaporation, summer precipitation and aridity. A second FST outlier locus, homologous to quinone oxidoreductase, was significantly associated with measures of temperature range, high summer temperature and summer solar radiation, with important implications for predicting the effect of temperature on natural populations in the context of climate change. We complemented these data with investigations into neutral population genetic structure and diversity throughout the species range. This study provides an investigation into selection signatures at gene-homologous EST-SSRs in natural Eucalyptus populations, and contributes to our understanding of the relationship between climate and adaptive genetic variation, informing the conservation of both putatively neutral and adaptive components of genetic diversity.

Microsatellite primers identified by 454 sequencing in the floodplain tree species Eucalyptus victrix (Myrtaceae).

PREMISE OF THE STUDY: Microsatellite primers were developed for Eucalyptus victrix (Myrtaceae) to evaluate the population and spatial genetic structure of this widespread northwestern Australian riparian tree species, which may be impacted by hydrological changes associated with mining activity. • METHODS AND RESULTS: 454 GS-FLX shotgun sequencing was used to obtain 1895 sequences containing putative microsatellite motifs. Ten polymorphic microsatellite loci were identified and screened for variation in individuals from two populations in the Pilbara region. Observed heterozygosities ranged from 0.44 to 0.91 (mean: 0.66) and the number of alleles per locus ranged from five to 25 (average: 11). • CONCLUSIONS: These microsatellite loci will be useful in future studies of population and spatial genetic structure in E. victrix, and inform the development of seed sourcing strategies for the species.

Development of microsatellite loci for the riparian tree species Melaleuca argentea (Myrtaceae) using 454 sequencing.

PREMISE OF THE STUDY: Microsatellite primers were developed for Melaleuca argentea (Myrtaceae) to evaluate genetic diversity and population genetic structure of this broadly distributed northern Australian riparian tree species. • METHODS AND RESULTS: 454 GS-FLX shotgun sequencing was used to obtain 5860 sequences containing putative microsatellite motifs. Two multiplex PCRs were optimized to genotype 11 polymorphic microsatellite loci. These loci were screened for variation in individuals from two populations in the Pilbara region, northwestern Western Australia. Overall, observed heterozygosities ranged from 0.27 to 0.86 (mean: 0.52) and the number of alleles per locus ranged from two to 13 (average: 4.3). • CONCLUSIONS: These microsatellite loci will be useful in future studies of the evolutionary history and population and spatial genetic structure in M. argentea, and inform the development of seed sourcing strategies for the species.

Development and testing of new gene-homologous EST-SSRs for Eucalyptus gomphocephala (Myrtaceae).

PREMISE OF THE STUDY: New microsatellite (simple sequence repeat [SSR]) primers were developed from Eucalyptus expressed sequence tags (ESTs) and optimized for genetic studies of the southwestern Australian tree E. gomphocephala, which is severely impacted by tree health decline and habitat fragmentation. • METHODS AND RESULTS: A total of 133 gene-homologous EST-SSR primer pairs were designed for Eucalyptus, and 44 were screened in E. gomphocephala. Of these, 17 produced reliable amplification products and 11 were polymorphic. Between two and 13 alleles were observed per locus, and observed heterozygosities ranged from 0.172 to 0.867. All 17 EST-SSRs that amplified E. gomphocephala cross-amplified to at least one of E. marginata, E. camaldulensis, and E. victrix. • CONCLUSIONS: This set of EST-SSR primer pairs will be valuable tools for future population genetic studies of E. gomphocephala and other eucalypts, particularly for studying gene-linked variation and informing seed-sourcing strategies for ecological restoration.