High Immigration Rates Research Articles

Using Twitter to investigate discourse on immigration: the role of values in expressing polarized attitudes toward asylum seekers during the closure of Roxham Road

IntroductionThe world is witnessing an escalating migration crisis, and Canada, with its historically high immigration rates, is experiencing a rise in the number of asylum seekers entering the country as well. Despite generally positive Canadian attitudes toward newcomers, there is a notable division in opinions about welcoming them. Past studies suggest personal values significantly shape these attitudes, particularly conservation (resistance to change) and self-transcendence (concern for others). However, little research has examined if these values manifest in social media discussions about immigration, especially at times when policies change. This study examines how the discourse on immigration changes following the announcement of the closure of Roxham Road, a debated irregular border crossing between the US and Canada used by asylum seekers.MethodIn total, 33,459 Tweets referencing Roxham Road were collected over the course of 1 week (before, during, and after the closure). We used the Personal Values Dictionary to automatically assess references to personal values (i.e., conservation and self-transcendence) in the Tweets.ResultsThe results indicate that expression of the values of conservation and self-transcendence were prevalent in discourse surrounding the closure of Roxham Road. Tweets expressing conservation had a negative tone, whereas Tweets expressing self-transcendence had a positive tone. Analyzing sentiment over time, Tweets reflecting conservation became less negative immediately after the closure, whereas Tweets reflecting self-transcendence values became more positive.DiscussionThe research highlights the interplay between personal values and policy change on immigration discourse and emphasizes the need for more analyses on how personal values are expressed in the public domain.

Far-Right Extremism, Elections and Hate Crime: A Temporal Evaluation of Bias-Motivated Violence in Slovakia

Abstract The present study provides an initial attempt to assess the impact of extremist right electoral support on racially motivated and extremist violent crime rates across Slovak regions. We transcend previous research by examining associations between national and regional elections, immigration rates, vote-shares, and violent hate crime rates utilizing temporal statistics on racially motivated and extremist violent crimes, which are linked with data on support for nationalist parties and on indicators of socio-economic development. Results illustrate that extreme right parties matter, such that the higher their electoral vote-shares, the higher the violent hate crime incidence and victimization rates. We, also, find that high immigration rates strengthen the effect of electoral vote-shares on bias crime in Slovakia.

High immigration rates critical for establishing emigration-driven diversity in microbial communities

Unraveling the mechanisms governing the diversity of ecological communities is a central goal in ecology. Although microbial dispersal constitutes an important ecological process, the effect of dispersal on microbial diversity is poorly understood. Here, we sought to fill this gap by combining a generalized Lotka-Volterra model with experimental investigations. Our model showed that emigration increases the diversity of the community when the immigration rate crosses a defined threshold, which we identified as Ineutral. We also found that at high immigration rates, emigration weakens the relative abundance of fast-growing species and thus enhances the mass effect and increases the diversity. We experimentally confirmed this finding using co-cultures of 20 bacterial strains isolated from the soil. Our model further showed that Ineutral decreases with the increase of species pool size, growth rate, and interspecies interaction. Our work deepens the understanding of the effects of dispersal on the diversity of natural communities.

Whether or Not to Open the Pandora’s Box: An Analysis of Latent Conflict in Vulnerable Neighbourhoods with High Socio-Cultural Diversity in Spain

ABSTRACT Worldwide, vulnerable neighbourhoods of large cities are often the scene of collective violent conflicts linked with migration and ethnic minorities’ struggles for social justice. However, urban conflicts of this kind have not taken place in Spanish cities with high immigration rates, even though the country has been deeply affected by two recent socioeconomic crises (2009 and 2020). This article reports findings of a study aimed at understanding what lies behind this apparent social peace. The research methodology was based on an analysis of secondary socio-economic and socio-relational data from the Spanish Institute of Statistics and from key national surveys and reports. Results confirmed that immigrant population living in the country are strongly segregated in the lower strata of the labour and socioeconomic structure and have been disproportionately affected by the crises. However, research findings also pointed to the existence of strong closed support networks where social capital has been effective at palliating members’ disadvantage and unrest. Drawing on the Theory of Rupture Frames, we argue that this is a fragile and unsustainable social peace, rooted in social injustice, and anticipate that unless actively prevented, uncontrolled conflict will eventually emerge in main cities’ neighbourhoods in Spain.

Rapid in situ diversification rates in Rhamnaceae explain the parallel evolution of high diversity in temperate biomes from global to local scales.

The macroevolutionary processes that have shaped biodiversity across the temperate realm remain poorly understood and may have resulted from evolutionary dynamics related to diversification rates, dispersal rates, and colonization times, closely coupled with Cenozoic climate change. We integrated phylogenomic, environmental ordination, and macroevolutionary analyses for the cosmopolitan angiosperm family Rhamnaceae to disentangle the evolutionary processes that have contributed to high species diversity within and across temperate biomes. Our results show independent colonization of environmentally similar but geographically separated temperate regions mainly during the Oligocene, consistent with the global expansion of temperate biomes. High global, regional, and local temperate diversity was the result of high in situ diversification rates, rather than high immigration rates or accumulation time, except for Southern China, which was colonized much earlier than the other regions. The relatively common lineage dispersals out of temperate hotspots highlight strong source-sink dynamics across the cosmopolitan distribution of Rhamnaceae. The proliferation of temperate environments since the Oligocene may have provided the ecological opportunity for rapid in situ diversification of Rhamnaceae across the temperate realm. Our study illustrates the importance of high in situ diversification rates for the establishment of modern temperate biomes and biodiversity hotspots across spatial scales.

Socioeconomic impacts on damage risk from typhoons in mega-urban regions in China: A case study using Typhoons Mangkhut and Lekima

Due to climate change, typhoons are becoming more frequent and destructive and thus increasingly threaten property and life. Many studies have discussed the relationships between disaster losses and socioeconomic development but have paid little attention to those relationships within mega-urban regions. This study aims to explore how socioeconomic factors affect disaster losses in mega-urban regions in China. Specifically, using data about Typhoons Mangkhut and Lekima, we established the association of socioeconomic factors with the affected population and economic losses caused by typhoons. Subsequently, we examined the significant differences of socioeconomic impacts among the cities proper and metro-rings within mega-urban regions and in non-mega-urban regions. Our results showed that higher per capita income, higher population density, higher percentage of females, and higher education level, are associated with fewer disaster losses. When the different areas were compared, we found that metro-rings suffered the largest population and economic losses. Also, the metro-rings’ high immigration rates, low education levels, and uncoordinated planning and management abilities, all contributed to its high disaster risk. Our results both provide insight into regional variations within mega-urban regions affected by typhoons and identify the distinctiveness exhibited by metro-rings, where high exposure and vulnerability make them the areas with the highest disaster risk. These results can help mega-urban regions in China institute viable measures for their most vulnerable areas to prevent disasters triggered by typhoons.

Inflammatory bowel disease among first generation immigrants in Israel: A nationwide epi-Israeli Inflammatory Bowel Disease Research Nucleus study.

Israel has a high rate of Jewish immigration and a high prevalence of inflammatory bowel disease (IBD). To compare IBD prevalence in first-generation immigrants vs Israel-born Jews. Patients with a diagnosis of IBD as of June 2020 were included from the validated epi-IIRN (Israeli IBD Research Nucleus) cohort that includes 98% of the Israeli population. We stratified the immigration cohort by IBD risk according to country of origin, time period of immigration, and age group as of June 2020. A total of 33544 patients were ascertained, of whom 18524 (55%) had Crohn's disease (CD) and 15020 (45%) had ulcerative colitis (UC); 28394 (85%) were Israel-born and 5150 (15%) were immigrants. UC was more prevalent in immigrants (2717; 53%) than in non-immigrants (12303, 43%, P < 0.001), especially in the < 1990 immigration period. After adjusting for age, longer duration in Israel was associated with a higher point prevalence rate in June 2020 (high-risk origin: Immigration < 1990: 645.9/100000, ≥ 1990: 613.2/100000, P = 0.043; intermediate/low-risk origin: < 1990: 540.5/100000, ≥ 1990: 192.0/100000, P < 0.001). The prevalence was higher in patients immigrating from countries with high risk for IBD (561.4/100000) than those originating from intermediate-/low-risk countries (514.3/100000; P < 0.001); non-immigrant prevalence was 528.9/100000. Lending support to the environmental effect on IBD etiology, we found that among immigrants to Israel, the prevalence of IBD increased with longer time since immigration, and was related to the risk of IBD in the country of origin. The UC rate was higher than that of CD only in those immigrating in earlier time periods.

1378. Seroprevalence and risk factors for cysticercosis in Mexican-Americans in Starr County, Texas

Abstract Background Neurocysticercosis (NCC) is a parasitic infection caused by the tapeworm Taenia solium, and is a leading cause of epilepsy and chronic headaches in endemic areas including Latin America, Africa, and Asia. The epidemiology of NCC has not been well-studied in the United States to date, but small epidemiological studies suggest evidence of this disease in populations living in poverty and who have immigrated from an endemic region. There is a population living in Starr County, Texas along the Texas-Mexico border in whom the presence of other neglected tropical diseases has been demonstrated due to the intersection of poverty, climate, and high rate of immigration. Methods Our study was a serologic survey and risk factor analysis of cysticercosis in a pre-existing cohort of Mexican-Americans in Starr County, Texas. We used a triplex enzyme-linked immunoassay (ELISA) against cysticercosis-specific antigens and self-reported survey data and neighborhood-level variables to conduct a risk-factor analysis of seropositive participants. Results We identified an overall seropositivity to T. solium in 7.4% (45/605) of the cohort which likely represents a combination of parasite exposure, T. solium disease outside of the central nervous system, old calcified NCC, and viable or degenerating NCC. Female gender, specific occupation and indoor versus outdoor occupation were found to be significantly associated with cysticercosis seropositivity. Thirty-nine of the 45 seropositive participants were female (p 0.021), 26 were employed in healthcare, caregiving, or social service (p 0.009), and 42 were employed in an indoor occupation (p &amp;lt; 0.001). These occupations could pose a risk for T. solium transmission. A geospatial analysis of cases at the census tract level showed increased percentage of seropositivity centered around urban cities Rio Grande City and Roma, as well as smaller city La Grulla and census-designated place Alto Bonito. Conclusion There is a critical need to investigate these cysticercosis-seropositive cases with brain imaging to evaluate for neurocysticercosis, as well as conduct an epidemiological investigation to determine disease transmission in Starr County. Disclosures All Authors: No reported disclosures

23 Association between Autism Spectrum Disorder and Parental Immigration among a Cohort of Preschool Children in Manitoba

Abstract Background Recent data indicate that rates of autism spectrum disorder (ASD) are increasing and therefore, studies exploring risk factors for ASD that can further support early diagnosis and intervention are needed. A link between immigration and autism has been made by several international studies, but despite high rates of immigration, a Canadian study examining this association has not been conducted. Objectives To determine the proportion of children diagnosed with ASD at Manitoba’s primary autism referral site (the only publicly funded site for ASD evaluation of children &amp;lt;6 years of age) that were born to immigrant parents, and compare it with the known proportion of immigrants in Manitoba. Also, to compare demographic and clinical characteristics of children whose parents are immigrants with those whose parents were born in Canada. Design/Methods We conducted a retrospective chart review of &amp;gt;2000 electronic records that identified all children &amp;lt;6 years diagnosed with ASD at the referral site between May 2016 and September 2021. Data on parental immigration, demographics, diagnostic evaluation, and medical history was collected. Descriptive statistics were used to compare the relative proportion of children with ASD from immigrant parents with the proportion of immigrants in Manitoba based on 2016 census data. Results A total of 1865 children were diagnosed with ASD during the study period. The mean age at referral and diagnosis was 2.81 (SD 1.26) years and 3.88 (SD 2.90) years respectively; 78% were male and 13.5% were born preterm. The proportion of children with ASD from immigrant parents (36%) was greater than the expected proportion (18.3%) of immigrants based on Manitoba census data (p &amp;lt; 0.001). The most common countries of origin of immigration were the Philippines (30.7%), India (11.6%), Nigeria (8.6%), and Ethiopia (6.4%). Overall, children of immigrants were younger at referral (2.71 years, SD = 0.98 versus 2.91 years, SD = 1.43; p &amp;lt;0.001), less likely to have a family history of ASD (17.1% versus 35.6%; p = &amp;lt;0.001) and less likely to have comorbidities (46.8% versus 53.9%; p &amp;lt;0.001) including global developmental delay (18% versus 27.6%; p &amp;lt;0.001). Conclusion At Manitoba’s primary autism referral site, there was a greater proportion of children diagnosed with ASD born to immigrant parents than expected when compared to the Manitoba population. Overall, children of immigrants were younger, less likely to have comorbidities, developmental delay, and a family history of ASD. Future prospective studies are required to better understand the complex relationship between immigration and ASD diagnosis.

Plural breeding among unrelated females and other insights on complex social structure in the cooperatively breeding Variegated Fairywren

ABSTRACT Cooperatively breeding species vary widely in degree of social complexity, and disentangling relationships among group members can reveal the costs and benefits of cooperation. Here, we describe the social system of the cooperatively breeding Variegated Fairywren (Malurus lamberti) and explore how social complexity and group dynamics may affect cooperation and conflict. We used a combination of field-based population monitoring and detailed social association observations to determine group membership annually across four breeding seasons (2014–2017) and used a ddRAD-seq genotyping method to determine genetic relationships within social groups. Social groups ranged in size from two to eight individuals and nearly half of all social groups had multiple adult individuals of both sexes. Approximately half of all groups exhibited plural breeding, in which multiple females within the same social group nested individually in the same territory. Genetic relationships were diverse among social groups due to high rates of extra-pair paternity and immigration, with most groups containing close relatives and non-relatives of each sex. Notably, although related females were often present within a social group, co-breeding females in the same social group were never closely related to each other. Given the extensive variation in relatedness among group members, cooperation in the Variegated Fairywren is likely maintained by a combination of direct and indirect fitness benefits.

Cellular RNA levels define heterotrophic substrate-uptake rate sub-guilds in activated sludge microbial communities.

A heterotrophic-specialist model was proposed previously to divide wastewater treatment plant (WWTP) heterotrophs into sub-guilds of consumers of readily or slowly degradable substrates (RDS or SDS, respectively). The substrate degradation rate model coupled to metabolic considerations predicted that RNA and polyhydroxyalkanoate (PHA) levels would be positively correlated in the activated sludge communities with high RNA and PHA occurring in RDS-consumers, and low RNA with no PHA accumulation occurring in SDS-consumers because their external substrates are always present. This prediction was verified in previous studies and in the current one. Thus, RNA and PHA levels were used as biomarkers of the RDS- and SDS-consumer sub-guilds for cell sorting using flow cytometry of samples from three WWTPs. Subsequently, 16S rRNA gene amplicon sequencing revealed that the sorted groups were highly similar over time and among WWTPs, and demonstrated a clear segregation by RNA levels. Predicted ecophysiological traits based on 16S rRNA phylogeny suggested that the high-RNA population showed RDS-consumer traits such as higher rrn copy numbers per genome. Using a mass-flow immigration model, it appeared that the high-RNA populations exhibited high immigration rates more frequently than low-RNA populations, but the differences in frequencies were less with increasing solids residence times.

Unveiling the transition from niche to dispersal assembly in ecology

A central goal in ecology is to understand what maintains species diversity in local communities. Classic ecological theory1,2 posits that niches dictate the maximum number of species that can coexist in a community and that the richness of observed species will be below this maximum only where immigration is very low. A new alternative theory3,4 is that niches, instead, dictate the minimum number of coexisting species and that the richness of observed species will usually be well above this because of ongoing immigration. We conducted an experimental test to discriminate between these two unified theories using a manipulative field experiment with tropical intertidal communities. We found, consistent with the new theory, that the relationship of species richness to immigration rate stabilized at a low value at low immigration rates and did not saturate at high immigration rates. Our results suggest that tropical intertidal communities have low niche diversity and are typically in a dispersal-assembled regime where immigration is high enough to overfill the niches. Observational data from other studies3,5 suggest that these conclusions may generalize to other ecological systems. Our new experimental approach can be adapted for other systems and be used as a ‘niche detector’ and a tool for assessing when communities are niche versus dispersal assembled.

Exploring the recovery of a large wetland using black-necked swan blood parameters and body condition 16 years after a pollution-induced disturbance.

Resilience theory has taken center stage in tackling the challenge of wetland recovery on a fast-changing planet. Because of waterbirds' enormous dependence on wetlands, their numbers have long been used as surrogates for wetland recovery over time. However, immigration of individuals can mask actual recoveries at a given wetland. One alternative to expanding the knowledge of wetland recovery is the use of physiological parameters from aquatic organism populations. We explored the variations in the physiological parameters of black-necked swan (BNS) before, during, and after a 16-year period of a pollution-induced disturbance that originated in a pulp-mill wastewater discharge. This disturbance triggered the precipitation of iron (Fe) in the water column of the Río Cruces Wetland in southern Chile, one of the main sites for the global population of BNS Cygnus melancoryphus. We compared our recent (2019) original data (body mass index [BMI], hematocrit, hemoglobin, mean corpuscular volume, blood enzymes, and metabolites) with available datasets from the site obtained before the pollution-induced disturbance (2003) and immediately after the disturbance (2004). Results indicate that, 16 years after the pollution-induced disturbance, some important parameters of animal physiology did not return to their pre-disturbance state. For instance, BMI, triglycerides, and glucose were significantly higher in 2019 than in 2004, right after the disturbance. By contrast, the hemoglobin concentration was significantly lower in 2019 than in 2003 and 2004, and uric acid was 42% higher in 2019 than in 2004. Our results demonstrate that, despite higher BNS numbers with larger body weights present in 2019, the Río Cruces wetland has only partially recovered. We suggest that the impact of megadrought and wetland disappearance far from the site results in high rate of swan immigration, casting uncertainty about using the number of swans alone as honest indicators of wetland recovery after a pollution disturbance. Integr Environ Assess Manag 2023;00:1-13. © 2023 SETAC.

Representation of minorities in European neurosurgical leadership

IntroductionEthnic diversity has significantly increased within European countries since World War II for several reasons. However, there continues to be a contrasting lag in leadership positions within healthcare circles, and neurosurgery is no exception. Under-representation of minorities is a contributory factor to recurring problems of healthcare inequality. Research questionThe European Association of Neurosurgical Societies (EANS) Diversity Committee (DC) set out to examine trends in underrepresented minority (URM) representation in leadership positions across Europe. Material and methodsData on the race and ethnicity of departmental heads across the units in the European nations was collated. We defined the term ‘ethnic minority’ in line with the criteria set by the European Commission against Racism and Intolerance (ECRI). The percentage of URM among the European neurosurgical units was analysed against the demographics of the respective countries to assess whether there was a corresponding association. ResultsThe percentage of URM representation was low across most European countries. Countries with the highest immigration rates e.g. Great Britain and Germany had the highest rates of representation within the neurosurgical leadership in comparison to other countries. The Balkan states had zero rates of URM representation within the neurosurgical leadership. Discussion and conclusionOur findings demonstrate that URM representation in neurosurgical leadership across European countries is significantly low. Selection policies, training curricula and recruitment processes aimed at improving health inequality are necessary. Further studies are needed to elucidate the factors contributing to the low participation of URM in neurosurgical leadership.

Demographic sustainability in Italian territories: The link between depopulation and population ageing

Since the Second World War, Italy has experienced major demographic changes, including increasing survival, decreasing fertility and higher rates of immigration. These changes have silently and slowly led to important shifts in the structure and the territorial distribution of the population. Thus, like in many other European countries, population ageing and depopulation have become the most relevant demographic phenomena in Italy. In this paper, we studied the relationship between depopulation and ageing in Italian territories in the 1971–2019 period using the census data of the Italian municipalities and applying spatial techniques. We found that high levels of depopulation later result in high levels of population ageing, and that recent population ageing processes are also connected to ongoing depopulation processes, thereby creating a vicious circle.

Mobility and land use in the Greater Khorasan Civilization: Isotopic approaches (87Sr/86Sr, δ18O) on human populations from southern Central Asia

The question of mobility of Bronze Age societies in southern Central Asia is a lively subject for discussion and remains a key aspect for understanding past human life. Central Asia represents a region where mobility and migration had a deep impact on the development of cultural communities. Surrounded by the great empires of the ancient Near East, it exhibited a high ethnic and genetic diversity. In this paper we present a regional study for southern Central Asia of isotopic analyses of 87Sr/86Sr and δ18O of human samples from several Bronze Age sites in southern Turkmenistan (Ulug Depe), south/central Uzbekistan (Dzharkutan, Sapallitepa, Tilla Bulak, Bustan and Bashman 1) and southern Tajikistan (Saridzhar, Gelot and Darnaichi). The three geographical zones manifest different patterns of mobility. The analysis of the Ulug Depe people demonstrates a high rate of immigration during the early periods (EBA) and a tendency for permanent residence. The later periods (MBA) are marked by a decrease in immigration and mobility, indicating a more extensive use of the surrounding landscape. Dzharkutan people displayed a different and complex pattern of mobility and subsistence, with frequent movements during individual lifetime within a limited area. The other sites in the Surkhan Darya Valley and southern Tajikistan indicate active mobility in which individuals migrated within a wide area of southern Central Asia.

Offshoring and well-being of workers

Using long panels of industry-specific offshoring information and subjectively reported well-being datasets mainly from Germany, which is also supported by datasets from the UK and Australia, this paper aims to investigate the relationship between offshoring and workers’ subjective well-being in the source country. We employ panel data fixed-effects models with time-variant personality measures and industry-specific measures to alleviate the bias stemming from the non-random sorting of individuals in industries. Our findings suggest that offshoring negatively relates to workers’ subjective well-being. The result is unexceptionally consistent across Germany, the UK, and Australia, and the effect is larger in business services and among high-skilled workers. We extensively discuss how contextual “fear-factors” prevailing in the source countries interact with the angst generated by the negative framing of offshoring. To single out such angst, we first show that objective and subjective job security concerns, job characteristics, and labor market conditions only marginally relate to the well-being effect of offshoring. Then, we investigate how the effect of offshoring on well-being is amplified by a larger set of contextual factors pertaining to temporary economic shocks, negative narratives about offshoring during electoral cycles, partisan political preferences, and high immigration rates. Finally, we show that a recent skill upgrade significantly diminishes the negative effect of offshoring on well-being.

A Preliminary Literature Review on the Effect of Immigration On Australian Domestic Employment and Wages

AbstractThe effects of immigration on domestic Australian employment levels and wages are ongoing and controversial topics. While this topic has been considered extensively in other countries, in particular the United States and the United Kingdom, these findings have limited application to Australia given differences in immigration settings between these contexts. We review the existing literature and conclude that further research in the Australian context is needed given its high rates of both permanent and temporary immigration, its complex visa structure, the unusual nature of its industrial relations system and the geographical concentration of its population. In particular, more attention to the temporary migrant population is required in future studies.

A Mathematical Model of Solid Waste Accumulation and Treatment with a Varying Human Population Size

Solid waste management has continued to be an increasing challenge worldwide and the situation has become worse in urban areas of developing countries. The rapid urban population growth, mainly due to high immigration and birth rates, has led to large amounts of solid waste, making it difficult for authorities to effectively manage the accumulated waste. Existing mathematical models of solid waste accumulation consider solid waste management by an external effort and do not address the contribution of the population in the management process. In this study, a mathematical model of solid waste accumulation is developed and analysed incorporating parameters for human immigration and solid waste recycling by particular population age groups. The solid waste is considered to be of two categories: biodegradable and non-biodegradable. Existence of equilibrium points is established and their stability analysed. Numerical simulations are done using MATLAB and Maple. Results show that solid waste increases with increasing human population and thus a solid waste free environment cannot be achieved. Sensitivity analysis suggests that improving the biodegradability of solid waste coupled with aiding solid waste decay and recycling reduces the final size of solid waste.

Population divergence time estimation using individual lineage label switching.

Divergence time estimation from multilocus genetic data has become common in population genetics and phylogenetics. We present a new Bayesian inference method that treats the divergence time as a random variable. The divergence time is calculated from an assembly of splitting events on individual lineages in a genealogy. The time for such a splitting event is drawn from a hazard function of the truncated normal distribution. This allows easy integration into the standard coalescence framework used in programs such as Migrate. We explore the accuracy of the new inference method with simulated population splittings over a wide range of divergence time values and with a reanalysis of a dataset of 5 populations consisting of 3 present-day populations (Africans, Europeans, Asian) and 2 archaic samples (Altai and Ust’Isthim). Evaluations of simple divergence models without subsequent geneflow show high accuracy, whereas the accuracy of the results of isolation with migration models depends on the magnitude of the immigration rate. High immigration rates lead to a time of the most recent common ancestor of the sample that, looking backward in time, predates the divergence time. Even with many independent loci, accurate estimation of the divergence time with high immigration rates becomes problematic. Our comparison to other software tools reveals that our lineage-switching method, implemented in Migrate, is comparable to IMa2p. The software Migrate can run large numbers of sequence loci (>1,000) on computer clusters in parallel.