Search results for "changes"
showing 10 items of 901 documents
How does climate change affect a fishable resource? The case of the royal sea cucumber (Parastichopus regalis) in the central Mediterranean Sea
2022
Holothurians or sea cucumbers are key organisms in marine ecosystems that, by ingesting large quantities of sediments, provide important ecosystem services. Among them, Parastichopus regalis (Cuvier, 1817) is one of the living sea cucumbers in the Mediterranean actively fished for human consumption mainly in Spain, where it is considered a gastronomic delicacy. In the Strait of Sicily (central Mediterranean Sea), this species is not exploited for commercial use even if it is used as bait by longline fishery. P. regalis is frequently caught by bottom trawling and discarded at sea by fishers after catch, and because of its capacity to resist air exposition (at least in cold months), it is rea…
Grammatical changes caused by contact between Livonian and Latvian
2014
The article provides insight into the process of various grammatical changes in Livonian and Latvian that have taken place as a result of prolonged contact between the languages. Livonian is strongly influenced by Latvian at different levels due to the close contact between the speakers of two languages; it is necessary to note that speakers of Livonian were bilinguals for a long time. It is clear that Livonian has affected Latvian in a similar way. The process of mutual borrowings can be observed most clearly in the vocabulary, especially in dialects; however, there are changes that have occurred in the phonetics and grammar as well. Different changes can be found as a result of mutual inf…
A higher incidence of moult–breeding overlap in great tits across time is linked to an increased frequency of second clutches: a possible effect of g…
2021
The rise of temperatures due to global warming is related to a lengthening of the breeding season in many bird species. This allows more pairs to attempt two clutches within the breeding season, thus finishing their breeding activity later in the season and therefore potentially overlapping these with post–breeding moult. We tested whether this occurred in two Spanish great tit Parus major populations. The proportion of pairs laying second clutches increased from 1 % to 32 % over the study period in one of the populations (Sagunto, 1995–2019), while it did not change in the other (Quintos, 2006–2019; mean 5 %). We did not find any temporal trend for moult start date of late–breeding birds i…
Comment on "Lethally hot temperatures during the Early Triassic greenhouse".
2013
Sun et al . (Reports, 19 October 2012, p. 366) reconstructed Permian to Middle Triassic equatorial seawater temperatures. After correct temporal positioning of their data points, their presumed trends of temperature changes, and hence their assumption of a one-to-one relationship between putative "lethally hot" seawater temperatures and a disputable equatorial "eclipse" of some organisms, are no longer supported by their data.
Quantifying the contribution of nitrification and denitrification to the nitrous oxide flux using 15N tracers.
2006
8 pages; International audience; Microbial transformations of nitrification and denitrification are the main sources of nitrous oxide (N2O) from soils. Relative contributions of both processes to N2O emissions were estimated on an agricultural soil using 15N isotope tracers (15NH4+ or 15NO3-), for a 10-day batch experiment. Under unsaturated and saturated conditions, both processes were significantly involved in N2O production. Under unsaturated conditions, 60% of N-N2O came from nitrification, while denitrification contributed around 85-90% under saturated conditions. Estimated nitrification rates were not significantly different whatever the soil moisture content, whereas the proportion o…
Climate change and cyclic predator-prey population dynamics in the high Arctic.
2009
The high Arctic has the world's simplest terrestrial vertebrate predator–prey community, with the collared lemming being the single main prey of four predators, the snowy owl, the Arctic fox, the long-tailed skua, and the stoat. Using a 20-year-long time series of population densities for the five species and a dynamic model that has been previously parameterized for northeast Greenland, we analyzed the population and community level consequences of the ongoing and predicted climate change. Species' responses to climate change are complex, because in addition to the direct effects of climate change, which vary depending on species' life histories, species are also affected indirectly due to…
Zur R�ntgenidentifizierung unbekannter Leichen bei fortgeschrittenen postmortalen Ver�nderungen
1989
Die postmortalen Veranderungen an einer Wasserleiche und an einer Brandleiche waren so weit fortgeschritten, das die ublichen Identifizierungsmethoden versagen musten. Vergleichende rontgenologische Untersuchungen ermoglichten jedoch den sicheren Nachweis der Identitat. Der Erfolg beruhte auf der individuellen Variabilitat des Skelettsystems und seiner hohen Widerstandsfahigkeit gegenuber intravitalen und postmortalen Einflussen. Neben der hohen Aussagekraft sind einfache, schnelle Handhabung sowie Dokumentation — ohne Beeintrachtigung der Obduktion — weitere Vorteile der Rontgenidentifizierung. Die vorgestellten Falle zeigen zudem, das auch zehn Jahre alte intravitale Vergleichsbilder zur …
Project Management in the Port Development Project in Latvia
2016
Paper analyse case study of performance and compliance audit in the port development project in Latvia. Author has participated in the audit process evaluating project management application practical approach in the project implemented by the Riga Freeport Authority and co-funded by the Cohesion Fund “Development of Infrastructure on Krievu Island for the Transfer of Port Activities from the City Centre”. Despite the mass media reports that the Riga Freeport Authority has successfully completed the project, only the construction phase of the project has been completed. During the following two years the stevedore activity must be transferred to the newly built port infrastructure on Krievu…
''No Gender Difference in Peak Performance in Ultra-Endurance Swimming Performance - Analysis of the 'Zurich 12-h Swim' from 1996 to 2010''
2012
Eichenberger, Evelyn | Knechtle, Beat | Christoph, Alexander Rust | Knechtle, Patrizia | Lepers, Romuald | Rosemann, Thomas; International audience; ''The aims of the study were to [1] investigate the performance trends at the 'Zurich 12-h Swim' in Switzerland from 1996 to 2010; and [2] determine the gender difference in peak performance in ultra-endurance swimming. In total, 113 male and 53 female swimmers competed in this indoor ultra-endurance event while swimming in a heated pool. The number of male participants significantly increased (r(2) = 0.36, P = 0.04) over time while the participation of females remained unchanged (r(2) = 0.12, P = 0.26). In the age group 0.05). The best perform…
Reliability of automated optical determination of capillary refill time
2021
The present study is devoted to assessment of automated optical capillary refill time determination by custom developed optoelectronic device prototype. Study comprised fifteen healthy volunteers; To induce capillary refill time changes the hand position challenge was utilized. During rest conditions slight inter-subject variation was observed: T90 (0.75±0.27 s), TSTB (2.20±0.58 s) and temperature at the measurement site (32.21±1.87 Co), however during hand position challenge results were more consistent. Rising hand substantially increased, while lowering slightly decreased capillary refill time. We conclude that automated determination of refill time have high clinical potential, however …