Migratory Movements Research Articles

Migration background and loneliness among middle-aged and older adults in Germany

Currently, there is limited knowledge about the association between amigration background and loneliness among middle-aged and older individuals in Germany. The aim was therefore to examine the association between migration background and loneliness in this group. Data were taken from the German Ageing Survey (Wave7, November 2020 to March 2021), arepresentative sample of middle-aged and older individuals. The sample comprised 4145 individuals, and the mean age was 63.8 years. Of the respondents, 93.2% had no migration background, approximately 5.9% had amigration background with personal migration experience, and 0.9% had amigration background but no personal migration experience. The De Jong Gierveld tool was used to quantify loneliness. Multiple linear regressions showed that individuals with amigration background and their own migration experience have significantly higher levels of loneliness (β = 0.15, 95% confidence interval (CI): 0.004 to 0.30, p < 0.05) compared to individuals without amigration background, whereas individuals with amigration background without their own migration experience have significantly lower levels of loneliness (β = -0.27, 95% CI: -0.52 to -0.02 p < 0.05). Individuals with amigration background and their own migration experience appear to represent arisk group for high loneliness among middle-aged and older adults in Germany. In this respect, this group should be given special consideration in corresponding measures. Against the background of current (and potential future) migration movements, the results are of great importance as these groups in particular could be affected by loneliness.

Celebrowanie świąt wśród polskiej społeczności w Armenii. Nośnik tożsamości, element promocji kultury czy substytut rozrywki w obcym otoczeniu etniczno-kulturowym?

From the historical perspective, Polish migration to Armenia intensified in the 19th century, when men were forcibly conscripted into the Tsar’s Army in the territory of the Russian partition. Since then, the dynamics of Polish mobility and its motivations have changed many times. As for the direction of the Caucasus, since the 1990s it has been closely associated with the population movement in the opposite direction, i.e., with the Armenian migration to Poland. However, we know relatively little on this subject, as most contemporary studies focus mainly on the analysis of historical processes, and the current migration movements are commonly referred to as “labor migration”. The following article is based on field research conducted by the author in 2015–2022. Their main axis was to learn about the ways of self-organization and functioning of the contemporary Polish community living in the Republic of Armenia. The article focuses on the description of individual phases of the annual rituals with which representatives of the Polish minority identify and the influence of Polish organizations on their celebration. The article covers both states, secular, and religious holidays. They create an interesting mosaic consisting of cultural and national identity, promotional and popularization elements, as well as the need for entertainment and social life in a local environment.

THE TRUE NATURE OF ARMENIAN MIGRATION ON THE EASTERN FRONT: THE CASE OF BİTLİS PROVINCE (1914-1922)

On 28 July 1914, when the First World War started, the Russian Caucasian army attacked the Ottoman lands in November 1914 and many Armenians adhere the Russian army. Taking advantage of this rebellion, Russian troops occupied Van on 20 May 1915 and dominated the region. With the occupation of Van, the Ottoman Government enacted the Law on Relocation and Resettlement on 27 May 1915 and relocated some Armenians in the war zones to the southern provinces of the Ottoman Empire for military reasons. In July 1915, the Russians, were forced to migrate the Armenians in the zone of occupation to the Caucasus. With the Russian occupation of Eastern Anatolia in 1916, the Armenians who had migrated returned. In 1917, with the withdrawal of the Russian Caucasian army, these Armenians had fled with the Russians. With the signing of the Armistice of Mudros, some Armenians came to Bitlis. In 1922, with the success of the Turkish War of Independence, Armenians who did not want to stay in Anatolia migrated to Istanbul and various Western countries. With the outbreak of the First World War, Armenians experienced a continuous migration movement due to the war conditions. Bitlis was one of the provinces where this migration movement took place. One of the main reasons for choosing Bitlis as a sample is that it is a province with a high Armenian population density. Secondly, the occupation of Bitlis by the Russians. It is assumed that the Armenian migrations in Bitlis were political in nature rather than war related. In this respect, it was determined that the Armenian population mobility in Bitlis took place eight times. As a result, it is possible to say that the main reason for such frequent mobility was that the Armenians acted with the Allies.

CED-5/CED-12 (DOCK/ELMO) can promote and inhibit F-actin formation via distinct motifs that may target different GTPases.

Coordinated activation and inhibition of F-actin supports the movements of morphogenesis. Understanding the proteins that regulate F-actin is important, since these proteins are mis-regulated in diseases like cancer. Our studies of C. elegans embryonic epidermal morphogenesis identified the GTPase CED-10/Rac1 as an essential activator of F-actin. However, we need to identify the GEF, or Guanine-nucleotide Exchange Factor, that activates CED-10/Rac1 during embryonic cell migrations. The two-component GEF, CED-5/CED-12, is known to activate CED-10/Rac1 to promote cell movements that result in the engulfment of dying cells during embryogenesis, and a later cell migration of the larval Distal Tip Cell. It is believed that CED-5/CED-12 powers cellular movements of corpse engulfment and DTC migration by promoting F-actin formation. Therefore, we tested if CED-5/CED-12 was involved in embryonic migrations, and got a contradictory result. CED-5/CED-12 definitely support embryonic migrations, since their loss led to embryos that died due to failed epidermal cell migrations. However, CED-5/CED-12 inhibited F-actin in the migrating epidermis, the opposite of what was expected for a CED-10 GEF. To address how CED-12/CED-5 could have two opposing effects on F-actin, during corpse engulfment and cell migration, we investigated if CED-12 harbors GAP (GTPase Activating Protein) functions. A candidate GAP region in CED-12 faces away from the CED-5 GEF catalytic region. Mutating a candidate catalytic Arginine in the CED-12 GAP region (R537A) altered the epidermal cell migration function, and not the corpse engulfment function. We interfered with GEF function by interfering with CED-5's ability to bind Rac1/CED-10. Mutating Serine-Arginine in CED-5/DOCK predicted to bind and stabilize Rac1 for catalysis, resulted in loss of both ventral enclosure and corpse engulfment. Genetic and expression studies strongly support that the GAP function likely acts on different GTPases. Thus, we propose CED-5/CED-12 support the cycling of multiple GTPases, by using distinct domains, to both promote and inhibit F-actin nucleation.

Climate change and migration dynamics in the Horn of Africa: a comprehensive review and future research directions

Introduction: In this study, relevant references are analysed to establish what factors determine migratory movements in the Horn of Africa and what role climate change plays. Methodology: A systematic literature review in five phases is conducted, selecting 221 relevant references based on inclusion and exclusion criteria. These references are used to analyze migration movements and the factors influencing them. Results: A notable increase in publications is highlighted since 2011, coinciding with a devastating drought in the region. Findings indicate that while climate change is an important factor, other elements such as poverty, insecurity, and conflicts play an even more significant role in regional migration. Discussion: Challenges, such as the lack of reliable data and the need for a multidisciplinary approach to address these complex issues, are identified. The region faces a critical situation with high levels of food insecurity, conflicts, and climate vulnerability, suggesting that climate change is an added factor to an already complicated situation. Conclusions: The study concludes that integrating climate change, migration, and conflicts in future research is crucial to develop effective and sustainable responses.

Effective Stance in Conservative Newspaper Opinion Articles on Irregular Immigration and Refugee Humanitarian Crises

This paper presents a quantitative and contrastive analysis of expressions of effective stance in conservative newspaper opinion articles related to irregular immigration and humanitarian crises involving refugees in both English and Spanish contexts. Drawing upon the seminal works of Langacker (2013) and Marín-Arrese (2021a, 2021b, 2023), the study examines six fundamental categories of effective stance expressions established according to factors such as orientation towards self or others, degree of control about the realisation of the event, and agreement with social norms. The dataset under examination comprises a 120,000-word corpus of opinion articles obtained from two conservative newspapers, The Telegraph from the United Kingdom and El Mundo from Spain. The words are evenly distributed, with each newspaper contributing 30,000 words in articles pertaining to three humanitarian crises involving refugees: Syria (2015), Afghanistan (2021), and Ukraine (2022-2023), and 30,000 words relating to articles on irregular immigration coinciding in time with each of the three refugee crises. The primary objective of the paper is to discern notable differences between the two newspapers and across the different refugee and irregular immigration crises under investigation. The analysis of the results, which uncover a larger number of effective stance expressions in the English subcorpus as well as distributional differences of subcategories across the subcorpora in both languages, provides a valuable understanding of the intricate patterns of usage and distribution of effective stance expressions within the realm of newspaper discourse, thereby enriching our comprehension of journalistic portrayals concerning the complexity of refugee crises and migratory movements.

Investigating the footprint of post-domestication dispersal on the diversity of modern European, African and Asian goats

BackgroundGoats were domesticated in the Fertile Crescent about 10,000 years before present (YBP) and subsequently spread across Eurasia and Africa. This dispersal is expected to generate a gradient of declining genetic diversity with increasing distance from the areas of early livestock management. Previous studies have reported the existence of such genetic cline in European goat populations, but they were based on a limited number of microsatellite markers. Here, we have analyzed data generated by the AdaptMap project and other studies. More specifically, we have used the geographic coordinates and estimates of the observed (Ho) and expected (He) heterozygosities of 1077 European, 1187 African and 617 Asian goats belonging to 38, 43 and 22 different breeds, respectively, to find out whether genetic diversity and distance to Ganj Dareh, a Neolithic settlement in western Iran for which evidence of an early management of domestic goats has been obtained, are significantly correlated.ResultsPrincipal component and ADMIXTURE analyses revealed an incomplete regional differentiation of European breeds, but two genetic clusters representing Northern Europe and the British-Irish Isles were remarkably differentiated from the remaining European populations. In African breeds, we observed five main clusters: (1) North Africa, (2) West Africa, (3) East Africa, (4) South Africa, and (5) Madagascar. Regarding Asian breeds, three well differentiated West Asian, South Asian and East Asian groups were observed. For European and Asian goats, no strong evidence of significant correlations between Ho and He and distance to Ganj Dareh was found. In contrast, in African breeds we detected a significant gradient of diversity, which decreased with distance to Ganj Dareh.ConclusionsThe detection of a genetic cline associated with distance to the Ganj Dareh in African but not in European or Asian goat breeds might reflect differences in the post-domestication dispersal process and subsequent migratory movements associated with the management of caprine populations from these three continents.

Abundance, production, and migrations of nesting green turtles at Rose Atoll, American Samoa, a regionally important rookery in the Central South Pacific Ocean

Sea turtles are a taxon of conservation concern and are highly migratory, exposing them to a variety of threats (e.g., fisheries bycatch, direct harvest) across their lifetime. Understanding the abundance of nesting females, hatchling production, and migratory movements - three of the most basic biological data needs for this species group - is imperative for population assessment. This study summarizes novel data most relevant to population assessments of the endangered central south Pacific (CSP) green turtle (Chelonia mydas) population, determined from annual rapid assessment surveys (mean survey duration=7.6 days year-1, n=61 survey days over 8 nesting seasons) and satellite telemetry at Rose Atoll, American Samoa, from 2012 to 2019. A minimum of 138 unique females nested in the Rose Atoll National Wildlife Refuge (RANWR) over the study period with 218 total females observed. Satellite tracks of post-nesting females suggest Fiji (n=33/48, 70.2%) is the primary foraging ground for turtles nesting at RANWR, though other areas throughout the south Pacific Ocean are also important. Limited data suggest hatchling production was high (average hatching success=92.3%) and nest temperature data collected from 2017-2019 suggest primary sex ratios were likely balanced during this time. These are positive signs for the resilience of this nesting population, but climate change poses threats to RANWR and other low-lying tropical islands throughout the central south Pacific, as nesting areas are potentially exposed to beach erosion, tidal inundations, and increasing temperatures leading to sex bias and embryonic death.

The Dynamics of Narrative Structure in Depicting the Repercussion of Migration Movements in Razan Naiem Almoghrabi’s Women of Wind

Writers of narrative fiction employ certain techniques in the structure of their literary works that reinforce the theme of the story. These techniques and narrative tools can be used in the various stages of the building block of the narration and enable the writers to manipulate such techniques in favor of producing certain images and ideas. Narrative voice, focalization, and interconnectedness of spatial and temporal presentations are among the most important tools available in the narrative structure of novels. Razan Naiem Almoghrabi in Women of Wind (2010) utilizes these techniques and tools available in narrative structure to depict the experiences of migrants from different nationalities who set out their migration from the shores of Libyan cities with the facilitation of human smugglers. The focus of this paper is on the effect of the narrative structure in portraying the mental and physical conditions of migrants. The major research question is how the narrative structure and techniques implemented in Women of Wind capture specific repercussion of migration movements. To depict a vivid portrayal of the suffering of migrants and the risks they encounter during their migration journey, Almoghrabi employs different narrators that allow the perception from different angles. The deployment of internal focalization through the eyes of one of characters, augmented the narration of subjective human experience. The intermingling of different voices and the nonlinear narration that shifts from one tempo-spatial presentation to another recreates in words the turbulent worlds of the characters in this novel.

Migratory movement of photo-identified humpback whales Megaptera novaeangliae along the southeastern coast of Africa

The global conservation of humpback whales Megaptera novaeangliae relies on continuous assessments of the populations’ post-whaling status, which in turn require information on population mixing and movements. One of the seven breeding stocks in the Southern Hemisphere, breeding stock C and its associated four substocks (C1–C4), utilises the western Indian Ocean in several discrete breeding grounds. However, information on the mixing of stocks across breeding grounds is limited. This study utilises photo-identification methods applied to the first multi-regional catalogue of fluke images available for substock C1S (the southern component of substock C1) which uses the southern portion of the breeding ground, developed as part of this study, to investigate the whales’ movements along the southeastern coast of southern Africa. The identification of 1 746 unique individuals, including 11 withinyear matches and 48 between-year matches of 45 individuals, provides new insight into the intra-regional migration patterns, fidelity and structure of substock C1S. The within-year match results confirmed that individual humpback whales are broadly seasonally present for extended periods and visit multiple subregions along this coast, while the between-year matches revealed long-term fidelity to this coastline. Moreover, five of the between-year matches between subregions in South Africa and Mozambique linked the South African migration corridor to the breeding ground in southern and central Mozambique. These findings provide valuable insights into the movement patterns of substock C1S and significantly address the challenges of effective population management, which includes difficulties associated with the whale-watching industry on the east coast of South Africa.

Migration as a Securitized Phenomenon: An Analysis of the Societal Security in Terms of EU Perception

In the 21st century, the diversification of communication and transportation opportunities has not only facilitated regular migration movements but also led to changes in the volume and dimensions of irregular migration. Migrants not only significantly influence the demographic, sociological, and economic structures of the countries they move to but have also become subjects of security concerns. Member countries of the European Union (EU) are targeted by migration movements due to attractive factors such as high living and working conditions, economic prosperity, and governance styles that respect human rights. Claims that migrants threaten the societal security of the EU by affecting its language, religion, cultural values, traditions, and national identities have become frequent topics of discussion in political and academic circles. In this regard, the main aim of the study is to determine whether migration poses a threat to the societal security of the EU or if such a perception exists in EU society. The findings indicate a strong perception in EU society that migration constitutes a threat to societal security.

German minority in urban space of a textile manufacturing centre: the case of 19th century city of Łódź

German settlement in Poland has been the subject of numerous studies. The causes and determinants of migratory movements have been discussed extensively, while little attention has been paid to the spatial aspects of the phenomenon. The aim of this study, which is part of geographical and historical research, is to determine the size of the influx of migrants of German nationality into the rapidly developing textile production centre of Łódź in the 19th century, as well as the geographical origins and distribution of this nationality group in the urban space. These considerations are complemented by the identification of key issues related to the social integration and assimilation processes of the German minority. In the first half of the 19th century, the influx of skilled labour, almost entirely recruited from the German population, conditioned the development of the textile industry in Łódź. It also had a key influence on the demographic development of Łódź, which soon became the largest centre of textile production in Poland. In subsequent decades, there was a tendency among German immigrants towards separation in the sphere of professional and social activities, but already by the end of the 19th century the German community settled in Łódź was diverse in terms of the sense of nationality. In addition to a certain proportion of the immigrants who were already Polonised, there were persons declaring German nationality, as well as those undecided about the issue.

Niemieckie „dzieci państwowe” (Staatskinder) wyznania ewangelickiego w kolonizacji wschodnich prowincji państwa pruskiego. Sierociniec w Ruchocinie/Mielżynie 1899–1918

The article presents the mechanism of the Prussian authorities using „state children” [Staatskinder] in the process of colonization of the eastern Prussian provinces, and combining charity activity with the program of Germanization of the area in question. The actions taken by the Prussian authorities in the late 19 and the early 20th century were in reaction to the internal migration movements, which directly affected the eastern Prussian provinces, from Berlins perspective negatively influencing their national structure. In 1895, Ernst Hasse presented a plan to colonize the eastern Prussian provinces by bringing „state children”, i.e. orphans and illegitimate children from the metropolitan areas of central and western Germany, and placing them in orphanages established in the East. The article describes, among others, one of such orphanages which operated between 1899 and 1918 and was supervised by the Protestant Association for the Care of Orphans in the Province of Poznań [Evangelischer Verein für Waisenpflege in der Provinz Posen].

Introduction

The June 2023 issue of our journal brings together our valuable readers with six different articles. In this issue, there are two research articles, one focusing on the continent of Europe and one on the Asian continent, two opinion articles focusing on the migration issue, which is one of the most important agenda items of Turkey and indeed the world, and two book reviews. The first research paper, authored by John Conrad Masabo, examines the potential repercussions of the COVID-19 pandemic on the future of European Union (EU) integration and its global impact. Exploring different views on whether the EU can become the most influential power in the post-COVID-19 world, the author suggests that while this possibility exists, there are significant hurdles that the EU must overcome before achieving such status. Merve Özten Yıldız, the author of the second research article, which aims to reveal how India is trying to construct a South Asian identity with Indo-Pacific discourses, examines the rise of India as the second most influential power in Asia. In his article, the author analyzes the official and practical discourse of India to understand its role in shaping regional identity and its growing influence on the international scene. The first review essay, authored by Müzeyyen Okyay, focuses on the issue of migration. The author dealt with the refugee and migrant problem, which has recently become the primary agenda item in EU-Turkey relations. In this study, the situation of people who have to migrate from their homeland, which is a common problem of Turkey and the EU and requires joint efforts to solve, has been examined within the framework of local laws and international agreements, and the effects of migration on the relations between Turkey and the EU have been analyzed. The second review essay belongs to Ufuk Tok. In this article, Tok examines the uncertainties that arose in Afghanistan following the US withdrawal and the Taliban takeover in August 2021. The author, who has the expectation that the integration of the country under the rule of the Taliban with the contemporary world will not be easy and quick, but will be gradual, also analyzes the effect of the long-lasting war on irregular migration from Afghanistan to the west and explores the possibilities of preventing the migration movement towards Turkey. The first review in the publication review section belongs to Selin Çınar. Çınar presents a comprehensive review of the compilation book The Routledge Handbook of Ideology and International Relations, edited by Jonathan Leader Maynard and Mark L. Haased and published in 2022. The second publication evaluation was made by Ahmet Emin Yıldız and is on the book titled Post-Cold War China-India Relations, written by Nezir Oğuş, the first edition of which was published in 2021. We would like to thank all the authors who have contributed to this issue of our journal by sending their works, and all the referees who have put effort in the evaluation process of these works; we hope that the continuing interest in our journal from the national and international academic community will continue.

The diet-intestinal microbiota dynamics and adaptation in an elevational migration bird, the Himalayan bluetail (Tarsiger rufilatus).

Migratory birds experience changes in their environment and diet during seasonal migrations, thus requiring interactions between diet and gut microbes. Understanding the co-evolution of the host and gut microbiota is critical for elucidating the rapid adaptations of avian gut microbiota. However, dynamics of gut microbial adaptations concerning elevational migratory behavior, which is prevalent but understudied in montane birds remain poorly understood. We focused on the Himalayan bluetail (Tarsiger rufilatus) in the montane forests of Mt. Gongga to understand the diet-gut microbial adaptations of elevational migratory birds. Our findings indicate that elevational migratory movements can rapidly alter gut microbial composition and function within a month. There was a significant interaction between an animal-based diet and gut microbiota across migration stages, underscoring the importance of diet in shaping microbial communities. Furthermore, the gut microbial composition of T. rufilatus may be potentially altered by high-altitude acclimatization. An increase in fatty acid and amino acid metabolism was observed in response to low temperatures and limited resources, resulting in enhanced energy extraction and nutrient utilization. Moreover, microbial communities in distinct gut segments varied in relative abundance and responses to environmental changes. While the bird jejunum exhibited greater susceptibility to food and environmental fluctuations, there was no significant difference in metabolic capacity among gut segments. This study provides initial evidence of rapid diet-gut microbial changes in distinct gut segments of elevational migratory birds and highlights the importance of seasonal sample collection. Our findings provide a deeper understanding of the unique high-altitude adaptation patterns of the gut microbiota for montane elevational migratory birds.

In Light of Political Developments, The Impact of Population and Migration Movements on Architectural Structures: The Case of Sinasos/Mustafapaşa

Individuals living in societies and societies have been forced to leave their territory and live in new areas of life, sometimes, preferably for some time, unwillingly. Societies and individuals change over time. There are changes in the conditions and needs of the day, as well as in the equipment and lifestyles used as a result of evolving technology. This is a direct reflection of where things are happening, and change is inevitable. This revealed the fact that people adapted to the area and culture concerned, but also to newcomers in the area concerned. The Anatolian geography has been home to ancient civilizations for thousands of years, and this has happened many times in history. In this context, the study was aimed at highlighting the architectural change in the region of Sinasos/Mustafapaşa, one of the important historical and tourist sites of Anatolia, as a result of migration and population movements, and the effects of this situation on the architecture. As a result of this work, forced migration and population movements often bring about changes in the traditional identities of the regions, and this is what decision-makers are asking for. Although this change is occurring, because of the combinations and similarities of cultures over time, structural and architectural change is not a radical change, and continues to create natural similarities and continuities.

Movements and habitat use of painted button-quail, Turnix varius, in tropical savanna of northern Queensland

Despite painted button-quail, Turnix varius, being one of Australia’s most common and widespread button-quail, knowledge of the species’ habitat use and movements is poor, and largely based on incidental observations. We GPS tracked eight painted button-quail individuals near Mareeba in northern Queensland during both dry (May to June 2020) and wet (January to February 2021) seasons. We found no evidence of nomadic or migratory movements; individuals occupied small home ranges (1.38–10.3 ha) and the species was present year-round. Differences in home-range size were detected between sexes and between seasons, likely reflecting the species’ polyandrous mating system. In both wet and dry seasons, painted button-quail occupied open savanna with a groundcover of native perennial tussock grasses. The home ranges of all tracked birds were associated mostly with ridges and slopes, although some use of alluvial flats was observed. The presence of perennial tussock grasses was consistent across the areas used by tracked individuals. In contrast to anecdotal reports, painted button-quail utilised areas with open groundcover (as low as 5% groundcover vegetation) as well as areas of dense cover (95% groundcover vegetation). Given that this is the first GPS-based movement study of any button-quail species, our findings provide potentially important insights into the daily and annual movements of this cryptic genus.

El migrante como sujeto literario en dos novelas enmarcadas en la España vacía: "La forastera" (2020) y "Un hípster en la España vacía" (2020)

The soaring of a new literary generation situating pieces of works in the so-called empty Spain has given rise to a wide range of themes, among which migratory movements stand out. The novels La forastera (2020) by Olga Merino and Un hípster en la España vacía (2020) by Daniel Gascón, whose diegesis includes immigrant characters conceived in different ways, are the objects of this study. This article delves into the construction of the abovementioned characters through the theory on the rural migratory phenomenon and the literature on immigration in Spain. Moreover, it reflects on the use of the stereotype, which in the work of Merino is strengthened and in the work of Gascón is subverted.

Southern breeding populations drive declining migration distances in Arctic and subarctic geese

Migration is a prevalent strategy among birds used to track seasonal resources throughout the year. Individual and population‐level migratory movements provide insight to life‐history variation, carry‐over effects, and impacts of climate change. Our understanding of how geographic variation in a species' breeding or wintering grounds can impact migration distances is limited. However, changes in migration distances can have important fitness consequences for individuals and conservation implications for populations, particularly if migratory connectivity is altered during the annual cycle. In this study, we use three decades of data from the United States Geological Survey Bird Banding Laboratory for six migratory species of Arctic and subarctic breeding geese. We employ a Bayesian hierarchical framework to test if the distance between breeding and wintering locations has changed over time, while accounting for the latitude of the breeding grounds. A model that included only a temporal trend estimated the average rate of change in migration distance, across all six species, at −3.0 km/year over the period 1990–2019. Five of the six species showed a significant decrease in migration distances. Including an interaction effect with breeding latitude revealed that the reduction in migration distance was strongest in the southernmost populations for four of the six species. For those species, migration distance in northern populations were all either relatively unchanged or increasing. This indicates that southern breeding populations of geese had a stronger association with the observed spatiotemporal changes in wintering ranges, potentially influenced by a combination of climatic and biotic factors (e.g. resource availability or competitive interactions) that uniquely impact these populations. Abundant, long‐term banding data shows promise for use in illuminating changes in migratory patterns under climate change, leading to improved management and conservation outcomes, from regional to continental scales.

Guidance on assessing the potential impacts of selenium in freshwater ecosystems.

Despite decades of fate and effects studies, environmental selenium (Se) contamination and management remain an issue for many freshwater systems in North America. Several regulatory bodies have promulgated updated targets or management levels for Se; however, additional guidance on best practices for monitoring Se to protect freshwater aquatic life is warranted. In this article, we describe current approaches to assessing the ecological risks of Se in impaired freshwater systems and outline recommended methods for collecting and analyzing biological and abiotic samples and interpreting data. Because reproductive impairment of fish populations is most commonly used to determine the potential impacts of Se, several biological factors that could affect Se toxicity are explored, including diet, trophic positions, reproductive biology, body size and maturity, migratory movements, and use of seasonal habitats. Measuring Se concentrations in mature eggs is the most reliable metric for estimating potential reproductive impairment in fish populations because the range of toxicity thresholds is relatively narrow for all but a few tolerant fish species. In situations where collecting mature eggs is not feasible, we review the use of alternative fish tissue for estimating potential effects. Factors affecting Se uptake from freshwater are also considered with guidance on collecting abiotic (e.g., water and sediment) and biotic components of aquatic food webs (e.g., macroinvertebrates, biofilm). Integr Environ Assess Manag 2024;00:1-16. © 2024 SETAC.