The globally widespread adoption of Artificial Light at Night (ALAN) began in the mid‐20th century. Yet, it is only in the last decade that a renewed research focus has emerged into its impacts on ...ecological and biological processes in the marine environment that are guided by natural intensities, moon phase, natural light and dark cycles and daily light spectra alterations. The field has diversified rapidly from one restricted to impacts on a handful of vertebrates, to one in which impacts have been quantified across a broad array of marine and coastal habitats and species. Here, we review the current understanding of ALAN impacts in diverse marine ecosystems. The review presents the current state of knowledge across key marine and coastal ecosystems (sandy and rocky shores, coral reefs and pelagic) and taxa (birds and sea turtles), introducing how ALAN can mask seabird and sea turtle navigation, cause changes in animals predation patterns and failure of coral spawning synchronization, as well as inhibition of zooplankton Diel Vertical Migration. Mitigation measures are recommended, however, while strategies for mitigation were easily identified, barriers to implementation are poorly understood. Finally, we point out knowledge gaps that if addressed would aid in the prediction and mitigation of ALAN impacts in the marine realm.
(a) Different marine environments not affected by Artificial Light Pollution at Night (ALAN), and (b) marine environments under the potential impacts of ALAN.
Investigar la influencia externa tanto lunar como climatológica en la frecuencia de partos. Incluye fuerza gravitacional lunar mediante apogeo y perigeo lunar apenas investigado.
Estudio ...retrospectivo mediante revisión de historias clínicas de todos los partos únicos de inicio espontáneo durante un periodo de 4 años (2015-2018). Se analiza estadísticamente la relación de los partos mediante coeficiente de nacimientos con variables cualitativas lunares (4 fases clásicas, apogeo-perigeo lunar y superlunas) y variables cuantitativas atmosféricas (presiones atmosféricas medias, temperatura media y velocidad media del viento).
No se encontró relación entre las variables estudiadas y el coeficiente de nacimientos. Se encontró periodicidad de partos con más nacimientos en los meses de mayo y junio.
Pese al mito existente de la influencia meteorológica y, sobre todo, lunar en los partos, no se encuentra razón estadística que lo apoye. Además de las fases clásicas, la fuerza gravitacional lunar tampoco parece desencadenar el parto.
To investigate the influence of external factors such as lunar and meteorological effects on the frequency of birth deliveries. It includes the lunar gravitational force using the scarcely investigated lunar apogee and perigee (furthest and closest distance to earth, respectively).
A retrospective study was conducted by reviewing the medical records of all spontaneous single deliveries during a 4 year period (2015-2018). A statistical analysis was performed on the relationship of the deliveries using birth rates with qualitative lunar variables (four classic phases, lunar apogee- perigee, and super moons) and quantitative atmospheric variables (mean atmospheric pressures, mean temperature, and mean wind velocity).
No relationship was found between the variables studied and the birth rate. There were periods with more births in the months of May and June.
Despite the myth on the meteorological, and in particular, the lunar influence on birth deliveries, no statistical association was found to support this. Furthermore, the classic moon phases and the lunar gravitational force do not seem to trigger birth delivery either.
Abstract We investigated the reproduction of the barnacle Tetraclita kuroshioensisChan, Tsang & Chu, 2007 (Cirripedia: Thoracica: Tetraclitidae) at different heights in the intertidal zone in ...Okinawa, Japan with a focus on gonadal development, the brooding of eggs, and unhatched larvae, as well as the role of environmental factors in breeding rhythmicity. Histological observations collected around each full moon from September 2019 to October 2020 showed various stages of oocyte development in September and October 2019 and from March to September 2020, whereas mature testes were observed from April to October 2020. The breeding season of this species thus lasts for at least seven months under long-day conditions at a water temperature above 21 °C. Barnacles collected from three tidal levels on multiple occasions during April, August, and October 2020 displayed little vertical variation in their stage of ovarian development, but there was a noticeable difference in the percentage of brooding individuals in August and October, as well as an increased prevalence of brooding during the new-moon phase at the upper and middle tidal heights. Our findings indicate that larval release by T. kuroshioensis undergoes seasonal variation, apparently influenced by the cycles of lunar (major factor) and tide (minor factor) in their habitat.
Abstract Understanding animal behavioural patterns can provide insight into how populations and communities are adapting to broader environmental shifts. The northern quoll ( Dasyurus hallucatus ), ...an endangered marsupial predator, has traditionally been classified as nocturnal. However, evidence is emerging that such simple classifications belie the complexity of animal activity patterns. Using time‐stamped camera trap imagery and fine‐scale accelerometer data, our study explores the diel activity patterns of northern quolls across their range in northern Australia. Contrary to the conventional nocturnal classification, we found that the northern quoll used bimodal activity patterns in four of the five populations examined in this study. Activity and accelerometer data showed two nightly movement peaks, with a distinctive lull around midnight, a pattern similar to one displayed by other marsupial predators. We found no consistent effect of season or lunar phase on temporal activity. Instead, its possible temporal activity patterns are primarily influenced by factors not accounted for here, such as prey availability, climate, predator avoidance, or energy expenditure related to digestion. We suggest further research incorporating these factors will improve our understanding of northern quoll behaviour.
Activity is an important aspect of animal behavior. Intrinsic and extrinsic factors can shape species activity patterns, which can alter and reshape several ecological aspects of the species. Human ...disturbance is known to modify the activity patterns of various species. The Marsh deer (Blastocerus dichotomus) is the largest Neotropical cervid, and has its southernmost distribution located in the wetlands of the lower Delta of the Paraná river, an area characterized by forestry plantations. We studied how the activity patterns of the marsh deer are affected by proxies of human movement, cattle presence, and moon phases in Argentina. We found that marsh deer presented activity peaks during crepuscular hours and moderate levels of activity during the entire night period. The majority of the independent camera‐trapping events of marsh deer occurred during the first quarter and last quarter phases, and the species was more active on sites far from rivers, which could infer an avoidance of human disturbances. In order to comprehend more deeply the variable effects on the activity patterns of marsh deer in this area, further analyses are needed, particularly using movement data of marked individuals.
We characterized the activity pattern, through camera trap data, of marsh deer in the Lower Delta of Paraná River (Argentina). We related the marsh deer events with the moon phases, cattle presence and proxies of human mobility. Activity peaks during the crepuscular hours and moderate levels during the night; the majority of events occurred during the first and last quarter. Cattle and marsh deer activity overlapped in 58%, in the morning hours. Deers were more active in sampling sites far from rivers.
The occurrence and composition of meso (5–25 mm) and microplastics (1–5 mm) in Playa Grande beach (Tenerife, Canary Islands, Spain) was monitored during a complete moon cycle on the different moon ...phases between 17th June and 16thJuly 2019. A total of 10 points were sampled each day finding an average content of mesoplastics of 18 g/m2 (0.36 g/L) and of microplastics of 13 g/m2 (1277 items/m2 or 1.6 g/L). Polypropylene and polyethylene accounted for 19% and 76% of the total, respectively. Tar was also found in the 1–5 mm fraction (2% of the total). Among the particles found, 83% were fragments, 11% pellets, 4% fibres and 2% films. The obtained results revealed that microplastic presence could not be related in this case with the tides but with the orientation and strength/speed of the wind.
Display omitted
•Meso and microplastics were monitored during a moon cycle.•Average content of mesoplastics of 18 g/m2 and of microplastics of 13 g/m2 were found.•Polyethylene and polypropylene were the most abundant microplastics.•Fragments and pellets were the predominating microplastic types.•Plastic debris could not be related with the tides but with wind orientation and strength.
PDF
