| 51761. |
- Michelangeli, Marcus, et al.
(författare)
-
Biological invasions as a selective filter driving behavioral divergence
- 2022
-
Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 13
-
Tidskriftsartikel (refereegranskat)abstract
- Biological invasions are a multi-stage process (i.e., transport, introduction, establishment, spread), with each stage potentially acting as a selective filter on traits associated with invasion success. Behavior (e.g., exploration, activity, boldness) plays a key role in facilitating species introductions, but whether invasion acts as a selective filter on such traits is not well known. Here we capitalize on the well-characterized introduction of an invasive lizard (Lampropholis delicata) across three independent lineages throughout the Pacific, and show that invasion shifted behavioral trait means and reduced among-individual variation-two key predictions of the selective filter hypothesis. Moreover, lizards from all three invasive ranges were also more behaviorally plastic (i.e., greater within-individual variation) than their native range counterparts. We provide support for the importance of selective filtering of behavioral traits in a widespread invasion. Given that invasive species are a leading driver of global biodiversity loss, understanding how invasion selects for specific behaviors is critical for improving predictions of the effects of alien species on invaded communities.Invasive species are a leading driver of global biodiversity loss. Here, the authors show that the process of invasion itself can promote behavioral changes important to the success of widespread invaders, with implications for understanding the effects of alien species on invaded communities.
|
|
| 51762. |
- Michelangeli, Marcus
(författare)
-
Personality, spatiotemporal ecological variation and resident/explorer movement syndromes in the sleepy lizard
- 2022
-
Ingår i: Journal of Animal Ecology. - : Wiley. - 0021-8790 .- 1365-2656. ; 91, s. 210-223
-
Tidskriftsartikel (refereegranskat)abstract
- Individual variation in movement is profoundly important for fitness and offers key insights into the spatial and temporal dynamics of populations and communities. Nonetheless, individual variation in fine-scale movement behaviours is rarely examined even though animal tracking devices offer the long-term, high-resolution, repeatable data in natural conditions that are ideal for studying this variation. Furthermore, of the few studies that consider individual variation in movement, even fewer also consider the internal traits and environmental factors that drive movement behaviour which are necessary for contextualising individual differences in movement patterns. In this study, we GPS tracked a free-ranging population of sleepy lizards Tiliqua rugosa, each Austral spring over 5 years to examine consistent among-individual variation in movement patterns, as well as how these differences were mediated by key internal and ecological factors. We found that individuals consistently differed in a suite of weekly movement traits, and that these traits strongly covaried among-individuals, forming movement syndromes. Lizards fell on a primary movement continuum, from 'residents' that spent extended periods of time residing within smaller core areas of their home range, to 'explorers' that moved greater distances and explored vaster areas of the environment. Importantly, we also found that these consistent differences in lizard movement were related to two ecologically important animal personality traits (boldness and aggression), their sex, key features of the environment (including food availability, and a key water resource), habitat type and seasonal variation (cool/moist vs. hot/drier) in environmental conditions. Broadly, these movement specialisations likely reflect variation in life-history tactics including foraging and mating tactics that ultimately underlie key differences in space use. Such information can be used to connect phenotypic population structure to key ecological and evolutionary processes, for example social networks and disease-transmission pathways, further highlighting the value of examining individual variation in movement behaviour.
|
|
| 51763. |
- Michelangeli, Marcus, et al.
(författare)
-
Pharmaceutical Pollution Alters the Structure of Freshwater Communities and Hinders Their Recovery from a Fish Predator
- 2024
-
Ingår i: Environmental Science and Technology. - 0013-936X .- 1520-5851. ; 58, s. 13904-13917
-
Tidskriftsartikel (refereegranskat)abstract
- Freshwater ecosystems are under threat from rising pharmaceutical pollution. While such pollutants are known to elicit biological effects on organisms, we have limited knowledge on how these effects might cascade through food-webs, disrupt ecological processes, and shape freshwater communities. In this study, we used a mesocosm experiment to explore how the community impacts of a top-order predator, the eastern mosquitofish (Gambusia holbrooki), are mediated by exposure to environmentally relevant low (measured concentration: similar to 10 ng/L) and high concentrations (similar to 110 ng/L) of the pervasive pharmaceutical pollutant fluoxetine. We found no evidence that exposure to fluoxetine altered the consumptive effects of mosquitofish on zooplankton. However, once mosquitofish were removed from the mesocosms, zooplankton abundance recovered to a greater extent in control mesocosms compared to both low and high fluoxetine-exposed mesocosms. By the end of the experiment, this resulted in fundamental differences in community structure between the control and fluoxetine-treated mesocosms. Specifically, the control mesocosms were characterized by higher zooplankton abundances and lower algal biomass, whereas mesocosms exposed to either low or high concentrations of fluoxetine had lower zooplankton abundances and higher algal biomass. Our results suggest that fluoxetine, even at very low concentrations, can alter aquatic communities and hinder their recovery from disturbances.
|
|
| 51764. |
- Michelangeli, Marcus
(författare)
-
Temporal repeatability of behaviour in a lizard: implications for behavioural syndrome studies
- 2023
-
Ingår i: Evolutionary Ecology. - : Springer Science and Business Media LLC. - 0269-7653 .- 1573-8477. ; 37, s. 401-418
-
Tidskriftsartikel (refereegranskat)abstract
- It is well established that, across taxa, individuals within populations exhibit consistent differences in their behaviour across time and/or contexts. Further, the functional coupling of traits may result in the formation of a behavioural syndrome. Despite extensive evidence on the existence of consistent among-individual differences in behaviour and behavioural syndromes in the animal realm, these findings are predominately based upon short-term assessments, leading to questions regarding their stability over longer periods. Understanding if these estimates are temporally stable would allow predictions of individual behaviour to be made using short-term repeated measures. Here, we used 57 adult male delicate skinks (Lampropholis delicata) to evaluate the stability of behavioural variation observed both among (animal personality and behavioural plasticity) and within individuals (behavioural predictability), as well as behavioural syndromes, across short (four weeks) and long (five months) timeframes. To do so, we repeatedly assayed activity, exploration, and boldness five times per each individual. Overall, our study revealed complex patterns of behavioural variation and trait (co)variation over time. Activity was always repeatable across time intervals, whereas behavioural differences among individuals in exploration and boldness were not consistent. Yet a behavioural syndrome between activity and exploration was detected at both shorter and longer temporal scales, suggesting that syndrome structure in these traits does not vary as a function of time. Our findings indicate that, at least for some traits (e.g. activity) and studies, short-term measures may be adequate in serving as a proxy for long-term variation in individual behaviour, and to reveal the existence of behavioural syndromes at the population level.
|
|
| 51765. |
- Michelle Grandin, H., et al.
(författare)
-
Bioinspired, nanoscale approaches in contemporary bioanalytics (Review)
- 2018
-
Ingår i: Biointerphases. - : American Vacuum Society. - 1559-4106 .- 1934-8630. ; 13:4
-
Tidskriftsartikel (refereegranskat)abstract
- The genesis for this topical review stems from the interdisciplinary Biointerfaces International conference 2016 (BI 2016) in Zurich, Switzerland, wherein the need for advances in analytical tools was both expressed and addressed. Pushing the limits of detection for characterizing individual components, such as single proteins, single drug-delivery vehicles, or probing single living cells in a more natural environment, will contribute to the understanding of the complex biomolecular systems central to a number of applications including medical diagnostics, tissue engineering, and drug screening and delivery. Accordingly, the authors begin with an overview of single nanoparticle analytics highlighting two emerging techniques and how they compare with existing techniques. The first is based on single particle tracking of nanoparticles tethered to a mobile supported lipid bilayer, enabling the simultaneous characterization of both size and composition of individual nanoparticles. The second technique is based on probing variations in the ionic conduction across nanoscale apertures for detection of not only nanoparticles but also membrane-tethered proteins, thereby allowing a multiparameter characterization of individual nanoscopic objects, addressing their size, shape, charge, and dipole moment. Subsequently, the authors lead into an example of an area of application that stands to benefit from such advances in bioanalytics, namely, the development of biomimetic lipid- and polymer-based assemblies as stimuli-responsive artificial organelles and nanocarriers designed to optimize delivery of next generation high-molecular-weight biological drugs. This in turn motivates the need for additional advanced techniques for investigating the cellular response to drug delivery, and so the review returns again to bioanalytics, in this case single-cell analysis, while highlighting a technique capable of probing and manipulating the content of individual living cells via fluidic force microscopy. In presenting a concerted movement in the field of bioinspired bioanalytics, positioned in the context of drug delivery, while also noting the critical role of surface modifications, it is the authors’ aim to evaluate progress in the field of single component bioanalytics and to emphasize the impact of initiating and maintaining a fruitful dialogue among scientists, together with clinicians and industry, to guide future directions in this area and to steer innovation to successful translation.
|
|
| 51766. |
- Michelsen, Verner
(författare)
-
A new European species of Delia Robineau-Desvoidy (Diptera : Anthomyiidae) near the wheat bulb fly, D-coarctata (Fallen)
- 2007
-
Ingår i: Zootaxa. - 1175-5334. ; :1412, s. 61-67
-
Tidskriftsartikel (refereegranskat)abstract
- A new species of Delia Robineau-Desvoidy is described from Europe ( Denmark, Sweden, Finland and Czech Republic) by the name of D. coarctoides. It is very similar to and has been confused with the wheat bulb fly, D. coarctata (Fallen), a well known anthomyiid pest species of cereals and grasses in Europe. A brief overview of the D. coarctata species group and a key to males and females are given.
|
|
| 51767. |
- Michelsen, Verner
(författare)
-
A new European species of Pegomya Robineau-Desvoidy (Diptera : Anthomyiidae) near P-flavoscutellata (Zetterstedt)
- 2006
-
Ingår i: Zootaxa. - 1175-5334. ; :1257, s. 49-55
-
Tidskriftsartikel (refereegranskat)abstract
- A new species of Pegomya Robineau-Desvoidy is described from Europe ( Sweden, Denmark and Finland) by the name of P. curviphallis. It belongs, together with the Holarctic P. flavoscutellata (Zetterstedt) and the Nearctic P. flaviantennata Griffiths, in a species group defined by a sickle-shaped distiphallus. Differential descriptions are given for the two European species of the P. flavoscutellata species group, P. curviphallis sp. nov. and P. flavoscutellata. Larvae of P. flavoscutellata are known to feed on bolete mushrooms (Leccinum spp.), and a similar larval diet can be expected in other species of the P. flavoscutellata species group.
|
|
| 51768. |
- Michelsen, Verner
(författare)
-
A new European species of Pegomya Robineau-Desvoidy (Diptera : Anthomyiidae) near P-testacea (De Geer)
- 2006
-
Ingår i: Zootaxa. - 1175-5334. ; :1260, s. 37-46
-
Tidskriftsartikel (refereegranskat)abstract
- A new species of Pegomya Robineau- Desvoidy, P. prisca sp. nov., is described from Europe ( Sweden, Czech Republic and Slovakia). It belongs to a species group together with the widespread West Palaearctic P. testacea ( De Geer) and P. hamata Wei described from China. Differential descriptions and illustrations of the terminalia are given for the two species of the Pegomya testacea species group found in Europe. Morphological and other evidence suggests that saprophagous larval habits persist in a few species of Pegomya represented by the P. testacea and P. ruficeps species groups.
|
|
| 51769. |
|
|
| 51770. |
|
|
