Abstract:
:At species' range edges, individuals often face novel environmental conditions that may limit range expansion until populations adapt. The potential to adapt depends on genetic variation upon which selection can act. However, populations at species' range edges are often genetically depauperate. One mechanism increasing genetic variation is reshuffling existing variation through sex. Sex, however, can potentially limit adaptation by breaking up existing beneficial allele combinations (recombination load). The gene swamping hypothesis predicts this is specifically the case when populations expand along an abiotic gradient and asymmetric dispersal leads to numerous maladapted dispersers from the range core swamping the range edge. We used the ciliate Tetrahymena thermophila as a model for testing the gene swamping hypothesis. We performed replicated range expansions in landscapes with or without a pH-gradient, while simultaneously manipulating the occurrence of gene flow and sexual versus asexual reproduction. We show that sex accelerated evolution of local adaptation in the absence of gene flow, but hindered it in the presence of gene flow. However, sex affected adaptation independently of the pH-gradient, indicating that both abiotic gradients and the biotic gradient in population density lead to gene swamping. Overall, our results show that gene swamping alters adaptation in life-history strategies.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Moerman F,Fronhofer EA,Wagner A,Altermatt Fdoi
10.1098/rsbl.2020.0244subject
Has Abstractpub_date
2020-06-01 00:00:00pages
20200244issue
6eissn
1744-9561issn
1744-957Xjournal_volume
16pub_type
杂志文章相关文献
Biology Letters文献大全abstract::Adaptive divergence may be facilitated if morphological and behavioural traits associated with local adaptation share the same genetic basis. It is therefore important to determine whether genes underlying adaptive morphological traits are associated with variation in behaviour in natural populations. Positive selecti...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.0416
更新日期:2009-12-23 00:00:00
abstract::Unmanned aerial vehicles, commonly called drones, are being increasingly used in ecological research, in particular to approach sensitive wildlife in inaccessible areas. Impact studies leading to recommendations for best practices are urgently needed. We tested the impact of drone colour, speed and flight angle on the...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2014.0754
更新日期:2015-02-01 00:00:00
abstract::In group-living vertebrates, reliable social allies play a decisive role in dealing with stressors. For example, support by social allies is known to dampen glucocorticoid responses. It remains unknown, however, how social embedding affects the sympatho-adrenergic axis as indicated by heart rate (HR) in non-human anim...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2011.0917
更新日期:2012-06-23 00:00:00
abstract::The evolution of fluorescence is largely unexplored, despite the newfound occurrence of this phenomenon in a variety of organisms. We document that spiders fluoresce under ultraviolet illumination, and find that the expression of this trait varies greatly among taxa in this species-rich group. All spiders we examined ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2007.0016
更新日期:2007-06-22 00:00:00
abstract::The ability to perceive the Earth's magnetic field, or magnetoreception, exists in numerous animals. Although the mechanism underlying magnetoreception has not been clearly established in any species, in salmonid fish, it is hypothesized to occur by means of crystals of magnetite associated with nervous tissue such as...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2018.0209
更新日期:2018-06-01 00:00:00
abstract::Research on reproductive isolation in African cichlid fishes has largely focused on the role of nuptial colours, but other sensory modes may play an important role in mate choice. Here, we compare the relative importance of visual and olfactory cues in mate recognition by females of a Lake Malawi cichlid species. Fema...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2005.0355
更新日期:2005-12-22 00:00:00
abstract::Bitterness perception in mammals is mostly directed at natural toxins that induce innate avoidance behaviours. Bitter taste is mediated by the G protein-coupled receptor TAS2R, which is located in taste cell membranes. One of the best-studied bitter taste receptors is TAS2R38, which recognizes phenylthiocarbamide (PTC...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0834
更新日期:2017-01-01 00:00:00
abstract::Trace metals produced by anthropogenic activities are of major importance in urban areas and might constitute a new evolutionary force selecting for the ability to cope with their deleterious effects. Interestingly, melanin pigments are known to bind metal ions, thereby potentially sequestering them in inert body part...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2014.0164
更新日期:2014-03-26 00:00:00
abstract::Understanding the relationship between disease transmission and host density is essential for predicting disease spread and control. Using long-term data on sarcoptic mange in a red fox Vulpes vulpes population, we tested long-held assumptions of density- and frequency-dependent direct disease transmission. We also as...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2014.0524
更新日期:2014-10-01 00:00:00
abstract::Heterochrony, differences in the timing of developmental events between descendent species and their ancestors, is a pervasive evolutionary pattern. However, the origins of such timing changes are still not resolved. Here we show, using sequence analysis, that exposure to predator cues altered the timing of onset of s...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.0658
更新日期:2011-04-23 00:00:00
abstract::The phenomenon of endocrine disruption is currently a source of growing concern. Feminization of male fish in UK rivers has been shown to occur extensively and has been linked with exposure to endocrine-disrupting compounds present in the environment. Much less is known of the extent and scale of endocrine disruption ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2006.0482
更新日期:2006-09-22 00:00:00
abstract::According to theory, directional female choice for male sexual ornaments is expected to erode underlying genetic variation. Considerable attention, in this regard, has been given to understanding the ubiquity of heritable genetic variation in both female choice and male sexual traits. One intriguing possibility emergi...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.0558
更新日期:2010-02-23 00:00:00
abstract::Activation of the immune system is associated with an increase in the breakdown of various peripheral tissues, including bone. Despite the widely appreciated role of inflammatory mediators in promoting bone resorption, the functional value behind this process is not completely understood. Recent advances in the field ...
journal_title:Biology letters
pub_type: 杂志文章,评审
doi:10.1098/rsbl.2017.0783
更新日期:2018-02-01 00:00:00
abstract::A recent study showed that a critically endangered migratory predator species, the Balearic shearwater Puffinus mauretanicus, rapidly expanded northwards in northeast Atlantic waters after the mid-1990s. As a significant positive correlation was found between the long-term changes in the abundance of this seabird and ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2011.0225
更新日期:2011-10-23 00:00:00
abstract::A challenge in animal ecology is to link animal movement to demography. In general, reproducing and non-reproducing animals may show different movement patterns. Dramatic changes in reproductive status, such as the loss of an offspring during the course of migration, might also affect movement. Studies linking movemen...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2014.0379
更新日期:2014-06-01 00:00:00
abstract::Learning is an important form of phenotypic plasticity that allows organisms to adjust their behaviour to the environment. An individual's learning performance can be affected by its mother's environment. For example, mothers exposed to stressors, such as restraint and forced swimming, often produce offspring with imp...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2012.0685
更新日期:2012-12-23 00:00:00
abstract::One response to the coral reef crisis has been human intervention to enhance selection on the fittest corals through cultivation. This requires genotypes to be identified for intervention, with a primary basis for this choice being growth: corals that quickly grow on contemporary reefs might be future winners. To test...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2020.0227
更新日期:2020-07-01 00:00:00
abstract::Most mammals and approximately 20% of squamates (lizards and snakes) are viviparous, whereas all crocodilians, birds and turtles are oviparous. Viviparity evolved greater than 100 times in squamates, including multiple times in Mabuyinae (Reptilia: Scincidae), making this group ideal for studying the evolution of nutr...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2016.0430
更新日期:2016-08-01 00:00:00
abstract::The workshop 'Species distribution models: applications, challenges and perspectives' held at Belo Horizonte (Brazil), 29-30 August 2011, aimed to review the state-of-the-art in species distribution modelling (SDM) in the neotropical realm. It brought together researchers in ecology, evolution, biogeography and conser...
journal_title:Biology letters
pub_type:
doi:10.1098/rsbl.2011.0942
更新日期:2012-06-23 00:00:00
abstract::The brilliant red, orange and yellow colours of parrot feathers are the product of psittacofulvins, which are synthetic pigments known only from parrots. Recent evidence suggests that some pigments in bird feathers function not just as colour generators, but also preserve plumage integrity by increasing the resistance...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.0716
更新日期:2011-04-23 00:00:00
abstract::Male bottlenose dolphins in Shark Bay, Western Australia form two levels of alliances; two to three males cooperate to herd individual females and teams of greater than three males compete with other groups for females. Previous observation suggested two alliance tactics: small four to six member teams of relatives th...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.0852
更新日期:2011-08-23 00:00:00
abstract::Lateralization is a well-described phenomenon in humans and other vertebrates and there are interesting parallels across a variety of different vertebrate species. However, there are only a few studies of lateralization in invertebrates. In a recent report, we showed lateralization of olfactory learning in the honeybe...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2007.0466
更新日期:2008-02-23 00:00:00
abstract::In April 2006, a dedicated survey of bowhead whales (Balaena mysticetus) was conducted on the former whaling ground in West Greenland to determine the current wintering population abundance. This effort included a double platform aerial survey design, satellite tracking of the movements of nine whales, and estimation ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2007.0310
更新日期:2007-10-22 00:00:00
abstract::Inbreeding causes increases in homozygosity and is commonly associated with reductions in fertility and embryogenesis. Although the mechanisms underlying such effects are unknown, recent work has suggested that inbred males may suffer impaired ejaculate quality, thus providing a functional explanation for reductions i...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2008.0734
更新日期:2009-06-23 00:00:00
abstract::In this study of body temperatures (T(b)) in free ranging dromedary camels, we found that bulls in rut start the days cooler. Daily minima during rut averaged 0.6 degrees C lower than at other times (95% CI 0.27-0.94 degrees C) and daily maxima averaged 0.45 degrees C higher (95% CI -0.01 to -0.91 degrees C), increasi...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2009.0450
更新日期:2009-12-23 00:00:00
abstract::Despite having a profound effect on population dynamics, the reasons that animals disperse are poorly understood. Evolutionary explanations have focused on inbreeding and competition, where the potential cost of philopatry is negated through dispersal. Such scenarios lead to the prediction that less successful individ...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2010.1119
更新日期:2011-06-23 00:00:00
abstract::Trophically transmitted parasites often alter their intermediate host's phenotype, thereby predisposing hosts to increased predation. This is generally considered to be a parasite strategy evolved to enhance transmission to the next host. However, the adaptive value of host manipulation is not clear, as it may be asso...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2008.0335
更新日期:2008-12-23 00:00:00
abstract::Fire is the most frequent disturbance in the Ericaceous Belt (ca 3000-4300 m.a.s.l.), one of the most important plant communities of tropical African mountains. Through resprouting after fire, Erica establishes a positive fire feedback under certain burning regimes. However, present-day human activity in the Bale Moun...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2019.0357
更新日期:2019-07-26 00:00:00
abstract::Sexual conflict occurs when selection to maximize fitness in one sex does so at the expense of the other sex. In the burying beetle Nicrophorus vespilloides, repeated mating provides assurance of paternity at a direct cost to female reproductive productivity. To reduce this cost, females could choose males with low re...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2015.1064
更新日期:2016-03-01 00:00:00
abstract::Predictions of future species' ranges under climate change are needed for conservation planning, for which species distribution models (SDMs) are widely used. However, global climate model-based (GCM) output grids can bias the area identified as suitable when these are used as SDM predictor variables, because GCM outp...
journal_title:Biology letters
pub_type: 杂志文章
doi:10.1098/rsbl.2008.0476
更新日期:2009-02-23 00:00:00