Increased immune marker variance in a population of invasive birds

Prüter, Hanna; Franz, Mathias; Twietmeyer, Sönke; Böhm, Niklas; Middendorff, Gudrun; Portas, Ruben; Melzheimer, Jörg; Kolberg, Holger; Samson‐Himmelstjerna, Georg von; Greenwood, Alex D.; Lüschow, Dörte; Mühldorfer, Kristin; Czirják, Gábor Á.

doi:10.1038/s41598-020-78427-7

Cited by 12 publications

(28 citation statements)

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“…For example, Martin (Martin et al, 2017) detected that TLR-4 expression may influence house sparrow expansion in Kenya. Pruter (Pruter et al, 2020) found that variations in specific immune effectors, which may be important for invasion success, may lead to higher variance and enable invasive species to reduce the overall physiological cost of immunity while maintaining the ability to efficiently defend against novel parasites encountered. In our study, we found that invasive species could successfully invade and spread even when the MHC diversity was reduced due to bottleneck effects.…”

Section: Discussionmentioning

confidence: 99%

“…Increased genetic variation and evolutionary potential aid the success of invasive species (Seiter & Kingsolver, 2013). Since pathogens are one of the major sources of mortality in natural populations, rapid adaptive evolution of immune genes plays a crucial role in defending against pathogenic bacteria and parasites during the invasion process (Eizaguirre, Lenz, Kalbe, & Milinski, 2012;Pruter et al, 2020). Although there have been some studies on immune genes in alien species (Martin et al, 2017), there is little comparison of the genetic diversity of populations in invasive areas versus the origin and how island effects and environmental factors affect the major histocompatibility complex (MHC) diversity.…”

Section: Introductionmentioning

confidence: 99%

“…Many forms of rapid evolution have been demonstrated in the spread of population invasions, including adaptation to new habitats (Colautti & Lau, 2015), the ability to spread (Lombaert et al, 2014;Phillips, Brown, Webb, & Shine, 2006), and the evolution of geographic clines along climatic gradients (Colautti & Barrett, 2013;Huey, 2000). Recent studies revealed that variation in specific immune vectors, which may be important for invasion success, might lead to higher variance and enable invasive species to reduce the overall physiological cost of immunity while maintaining the ability to efficiently defend against novel parasites encountered (Pruter et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Adaptive selection and reshaping of the genetic structure of an immune gene in invasive Lithobates catesbeianus

Zhang¹,

wang²,

Xu³

et al. 2022

Preprint

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When alien species enter new environments, they face new challenges. They encounter new predators, parasites, or pathogenic bacteria, which leads to the rapid evolution of invasive species to adapt to new habitats, where immune-related genes play a significant role. Lithobates catesbeianus is one of the worst invasive species in the world; it rapidly spread worldwide in the 19th century and invaded China in the 1950s. We predicted the possible transmission routes of bullfrogs in China through microsatellite loci and clustered the populations at different points. We studied the adaptive selection and drift reshaping of the genetic structure of an immune genetic major histocompatibility complex (MHC) in invasive bullfrogs in 23 Chinese invasive populations (13 island and 10 mainland sites) and two American populations (Kansas and California). The Chinese bullfrog populations were divided into 6 clusters by microsatellite structure, and the MHC diversity in each cluster was different. The genetic diversity of both microsatellite and MHC genes decreased due to the bottleneck effect and the rate of diversity loss at functional and neutral loci, and there was no significant difference. We found that two MHC alleles were endemic in Chinese populations, which corresponded to distinct functional supertypes. We also analyzed the impact of environmental factors and island effects on the diversity of MHC genes. These results indicate that rapid evolution plays an important role in maintaining functionally important MHC variation during the bullfrog invasion process and provide evidence that low genetic diversity can result in successful invasion.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adaptive selection and reshaping of the genetic structure of an immune gene in invasive Lithobates catesbeianus

Zhang¹,

wang²,

Xu³

et al. 2022

Preprint

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“…Crayfish immune response is a result of complex interactions of multiple intrinsic (e.g., body condition, parasite load, diseases) and extrinsic (e.g., environmental conditions, population density, predation risk) factors [ 93 , 94 , 95 ]. In addition to these factors, the invasion process may also affect the immune response of both the crayfish invader and the native crayfish species due to potential trade-offs between immunity and the host’s reproductive fitness [ 7 , 96 , 97 ] and potential spatial sorting of individuals with certain life-history traits during non-random dispersal (i.e., [ 98 ]). Here, we analyzed the differences in the immune response of the invasive signal crayfish along its invasion range.…”

Section: Discussionmentioning

confidence: 99%

Immune Response in Crayfish Is Species-Specific and Exhibits Changes along Invasion Range of a Successful Invader

Dragičević

Grbin

Maguire

et al. 2021

Biology

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Immunity is an important component of invasion success since it enables invaders’ adaptation to conditions of the novel environment as they expand their range. Immune response of invaders may vary along the invasion range due to encountered parasites/microbial communities, conditions of the local environment, and ecological processes that arise during the range expansion. Here, we analyzed changes in the immune response along the invasion range of one of the most successful aquatic invaders, the signal crayfish, in the recently invaded Korana River, Croatia. We used several standard immune parameters (encapsulation response, hemocyte count, phenoloxidaze activity, and total prophenoloxidaze) to: i) compare immune response of the signal crayfish along its invasion range, and between species (comparison with co-occurring native narrow-clawed crayfish), and ii) analyze effects of specific predictors (water temperature, crayfish abundance, and body condition) on crayfish immune response changes. Immune response displayed species-specificity, differed significantly along the signal crayfish invasion range, and was mostly affected by water temperature and population abundance. Specific immune parameters showed density-dependent variation corresponding to increased investment in them during range expansion. Obtained results offer baseline insights for elucidating the role of immunocompetence in the invasion success of an invertebrate freshwater invader.

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“…immune response) to spread in a harsher environment, relative to a more stable perennial reach. Evidence of a genetic-immune mechanism appear to exist in animal populations (Råberg et al, 2007), including invasive birds (Prüter et al, 2020) and mammals (Biedrzycka et al, 2020), although less support has been found for non-native fish (but see a possible example for an invasive goby in Gendron & Marcogliese, 2017). Thus, more research is needed to reveal the particular regulatory mechanisms at the genetic level and the components of the immune response that are acting at the molecular/cellular levels (Rohlenová et al, 2011).…”

Section: Fa (µM)mentioning

confidence: 99%

Comparing morphological, parasitological, and genetic traits of an invasive minnow between intermittent and perennial stream reaches

et al. 2022

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Invasive fishes are a major environmental issue at the global scale, particularly for their impacts on freshwater ecosystems via the mechanisms of hybridisation, competition, predation, and disease transmission. This is of special conservation concern on the Iberian Peninsula due to the high level of endemism. With the aim to improve our knowledge on the invasion process of non‐native fishes, the present study consists of analysing key biological traits potentially related to their colonisation capacity: morphology, parasite communities, and genetic diversity. A non‐native population of Languedoc minnow Phoxinus septimaniae (leuciscid species native to south‐east France) was assessed in Tordera Stream (north‐eastern Iberian Peninsula). Fish were sampled in mid‐May (reproductive period) 2018 and 2019. Biological traits were compared between colonising and resident individuals from stream reaches of intermittent and perennial flow, respectively. After adjusting for fish size/body mass with analysis of covariance, body condition and health status (external and internal examination) tended to be better in the intermittent reach. Parasite load (number) and diversity (Shannon index) were significantly higher in the perennial reach. Fish development was also more stable in colonising minnow, as detected by low levels of fluctuating asymmetry for the eye diameter and the length of pectoral fins (adjusted for bilateral character size). Genetic diversity (microsatellite markers) was lower in resident minnow. Minnow genetic homozygosity (index of internal relatedness) was positively associated with parasite load and developmental instability (high fluctuating asymmetry levels). Our results show that colonising minnows display particular profiles of morphological, parasitological, and genetic traits that apparently allow these individuals to increase their dispersal capacity to survive and reproduce in harsher environmental conditions. The potential mechanisms may be related to a wider physiological tolerance, better immune response, parasite resistance/tolerance, and genetic diversity in colonising specimens. Such information reveals the specific traits of successful fish invaders under a seasonal colonisation dynamic. These data are relevant for environmental managers, to predict and identify areas vulnerable to invasion, in order to establish monitoring programmes for early detection, which will help to reduce the spread of non‐native fish populations.

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Increased immune marker variance in a population of invasive birds

Cited by 12 publications

References 53 publications

Adaptive selection and reshaping of the genetic structure of an immune gene in invasive Lithobates catesbeianus

Adaptive selection and reshaping of the genetic structure of an immune gene in invasive Lithobates catesbeianus

Immune Response in Crayfish Is Species-Specific and Exhibits Changes along Invasion Range of a Successful Invader

Comparing morphological, parasitological, and genetic traits of an invasive minnow between intermittent and perennial stream reaches

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