Transcriptional flexibility during thermal challenge corresponds with expanded thermal tolerance in an invasive compared to native fish

Evolutionary Applications, Год журнала: 2020, Номер 14(4), С. 931 - 949

Опубликована: Ноя. 21, 2020

Abstract Capacity to cope with warming temperatures is a key determining factor of species' persistence under global climate change. Many successful invasive species have heightened thermal tolerance relative their native counterparts, which may provide competitive advantages for habitat utilization and resource acquisition scenarios, ultimately contributing radically altered community composition. Enhanced transcriptional plasticity be an important conferring superior abilities environmental stress, but the molecular mechanisms driving differences organismal traits in versus are not well known. Although it predicted that established invaders will evolve canalized phenotypes well‐adapted new environments, clear whether same expectations true variable environments or scenarios where fluctuating increasing fitness advantages. Here, we compare highly fish sympatric endangered living dynamic estuarine environment projected warm We linked physiological limits responses at multiple common absolute temperature thresholds determined Inland Silversides ( Menidia beryllina ) associated changes greater both number genes magnitude response Delta Smelt Hypomesus transpacificus ). Modulated contributed enrichment biological processes differed between generally increased temperature. These results concordance hypothesis play role population persistence, interactions, shaping assemblages Future studies encompassing wider range taxa needed determine this general pattern found more broadly.

Язык: Английский

---

Sex‐ and time‐specific parental effects of warming on reproduction and offspring quality in a coral reef fish

Evolutionary Applications, Год журнала: 2020, Номер 14(4), С. 1145 - 1158

Опубликована: Дек. 18, 2020

Global warming can disrupt reproduction or lead to fewer and poorer quality offspring, owing the thermally sensitive nature of reproductive physiology. However, phenotypic plasticity may enable some animals adjust thermal sensitivity maintain performance in warmer conditions. Whether elevated temperature affects depend on timing exposure sex parent exposed. We exposed male female coral reef damselfish (

Язык: Английский

---

Molecular Response of the Brain to Cross-Generational Warming in a Coral Reef Fish

Frontiers in Marine Science, Год журнала: 2022, Номер 9

Опубликована: Март 4, 2022

Ocean warming is a threat to marine biodiversity, as it can push species beyond their physiological limits. Detrimental effects occur when poikilotherms are exposed conditions thermal optima. However, acclamatory mechanisms, such plasticity, may enable compensation of detrimental if experienced during development or across generations. Studies evaluating the molecular responses fishes have mostly focused on liver, muscle, and gonads, little known about other vital organs, including brain. This study evaluated transcriptional program brain in coral reef fish Acanthochromis polyacanthus , two different scenarios: +1.5°C +3.0°C, successive Fish were these both developmental (F1 F2) transgenerational settings (F2 only), well treatment with step-wise between The largest differences gene expression individuals first second generation, pattern that was corroborated by pairwise comparisons Control F1 F2 (7,500 DEGs) fish. large difference could be associated parental effects, parents generation collected from wild, whereas reared captivity. A general response observed at temperatures treatments included protein folding, oxygen transport (i.e., myoglobin), apoptosis cell death, modification cellular structure, mitochondrial activity, immunity changes circadian regulation. Treatments highest temperature showed reduction synaptic activity neurotransmission, which matches previous behavioral observations fishes. Transgenerational +3.0°C significant activation pls3 for neuro-muscular junctions under heat-stress. samples an intermediate response, few differentially expressed genes compared groups (except +1.5°C). In combination studies liver expression, this indicates produces signature stress A. influenced intensity duration exposure.

Язык: Английский

---

Latitudinal variation in climate‐associated genes imperils range edge populations

Molecular Ecology, Год журнала: 2020, Номер 29(22), С. 4337 - 4349

Опубликована: Сен. 27, 2020

Abstract The ecological impacts of increasing global temperatures are evident in most ecosystems on Earth, but our understanding how climatic variation influences natural selection and adaptive resilience across latitudes remains largely unknown. Latitudinal gradients allow testing general ecosystem‐level theories relevant to adaptation. We assessed differences diversity populations along a latitudinal region spanning highly variable temperate subtropical climates. generated integrated information from environmental mapping, phenotypic genome‐wide data the geographical range rainbowfish Melanotaenia duboulayi , an emerging aquatic system for studies climate change. detected, after controlling spatial population structure, strong interactions between genotypes environment associated with stream flow temperature. Some these hydroclimate‐associated genes were found interact within functional protein networks that contain significance projected future climates rainbowfish. Hydroclimatic was also traits, including traits known affect fitness exposed different environments. Consistent predictions “climatic variability hypothesis,” extremes important variables showed stronger divergence less climate‐associated compared at centre gradient. Our findings suggest evolved margins edges may be more vulnerable changing climates, finding implications predicting managing biodiversity under

Язык: Английский

---

Longitudinal monitoring of neutral and adaptive genomic diversity in a reintroduction

Conservation Biology, Год журнала: 2022, Номер 36(4)

Опубликована: Янв. 13, 2022

Restoration programs in the form of ex-situ breeding combined with reintroductions are becoming critical to counteract demographic declines and species losses. Such increasingly using genetic management improve conservation outcomes. However, lack long-term monitoring indicators following reintroduction prevents assessments trajectory persistence reintroduced populations. We carried out an extensive program wild for a threatened small-bodied fish (southern pygmy perch, Nannoperca australis) assess genomic effects its captive reintroduction. The was rescued prior extirpation from terminal lakes Australia's Murray-Darling Basin, then used genetically informed reintroductions. Subsequent annual or biannual abundance, fitness, occupancy over period 11 years, postreintroduction sampling, revealed survival recruitment fish. Genomic analyses based on data original rescued, born, cohorts low inbreeding strong maintenance neutral candidate adaptive diversity across multiple generations. An increasing trend effective population size consistent field demonstrating successful re-establishment species. This provides rare empirical example that potential locally extinct can be maintained during into wild. Strategies biodiversity restoration via should include genetic-based longitudinal standing variation populations.Monitoreo Longitudinal de la Diversidad Genómica Neutral y Adaptativa en una Reintroducción Marshall et al. 21-643 Resumen Los programas restauración manera reproducción ex situ combinada con reintroducciones se están volviendo críticos para contrarrestar las declinaciones demográficas pérdida especies. Dichos usan cada vez más gestión genética mejorar los resultados conservación. Sin embargo, falta monitoreo largo plazo indicadores genéticos posteriores reintroducción evita que realicen evaluaciones trayectoria persistencia poblaciones reintroducidas. Se rescató un pez talla pequeña (percha pigmea del sur [Nannoperca australis]) previo su extirpación lagos terminales Cuenca Australia después reproducirlo cautiverio información reintroducirlo. Realizamos monitoreos anuales o bianuales abundancia, aptitud ocupación vida silvestre durante once años, además muestreo genético posterior reintroducción. Analizamos datos genómicos grupos originales rescatados, nacidos reintroducidos. Nuestro objetivo era evaluar efectos esta especie. Esto reveló baja endogamia el sólido mantenimiento diversidad genómica adaptativa varias generaciones. Encontramos coherencia entre tendencia creciente tamaño población efectiva reintroducida campo demostraron restablecimiento exitoso estudio proporciona raro ejemplo empírico cómo potencial adaptativo localmente extinta puede mantenerse conservación genéticamente informada Las estrategias biodiversidad por medio deberían incluir basada variación actual

---