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Article Reference Hydrogen isotopes in Quaternary mammal collagen from Europe
Located in Library / RBINS Staff Publications 2017
Article Reference Hydrological regime and salinity alter the bioavailability of Cu and Zn in wetlands
In the context of the European Water Framework Directive, controlled flooding of lowlands is considered as a potential water management strategy to minimise the risk of flooding of inhabited areas. However, due to historical pollution and overbank sedimentation, metal levels are elevated in most wetlands, which can cause adverse effects on the ecosystem's dynamics. Additionally, salinity affects the bioavailability of metals present or imported into these systems. The effect of different flooding regimes and salinity exposure scenarios (fresh- and brackish water conditions) on Cu and Zn accumulation in the oligochaete Tubifex tubifex (Muller, 1774) was examined. Metal mobility was closely linked to redox potential, which is directly related to the prevalent hydrological regime. Flooded, and thus more reduced, conditions minimized the availability of metals, while oxidation of the substrates during a drier period was associated with a rapid increase of metal availability and accumulation in the oligochaetes. (C) 2009 Elsevier Ltd. All rights reserved.
Located in Library / RBINS Staff Publications
Article Reference HYPERNETS: a network concept for automated hyperspectral radiometers to validate water and land surface reflectance (380-1700 nm) from all satellite missions
Located in Library / RBINS Staff Publications 2024
Article Reference Hypersalinity drives convergent bone mass increases in Miocene marine mammals from the Paratethys
Located in Library / RBINS Staff Publications 2021
Article Reference Hypoponera eduardi (Forel, 1894) (Hymenoptera: Formicidae) on extensive green roofs in the Province of Antwerp: a new species for the Belgian ant fauna
From 2019 until 2021, we investigated extensive green roofs in Flanders (Belgium) for their arthropod communities. On two different roofs we found, amongst the collected specimens, a species new for the Belgian ant fauna: Hypoponera eduardi (Forel, 1894). The presence of multiple worker ants belonging to this species indicates that it has formed a colony on at least one roof. Apparently, the warm and dry conditions that arise on extensive green roofs as a consequence of the shallow substrate layers lead to suitable habitat conditions for this species.
Located in Library / RBINS Staff Publications 2022
Article Reference HYPSTAR: a hyperspectral pointable system for terrestrial and aquatic radiometry
pOptical Earth observation satellites provide vast amounts of data on a daily basis. The top-of-atmosphere radiance measured by these satellites is usually converted to bottom-of-atmosphere radiance or reflectance which is then used for deriving numerous higher level products used for monitoring environmental conditions, climate change, stock of natural resources, etc. The increase of available remote sensing data impacts decision-making on both regional and global scales, and demands appropriate quality control and validation procedures. A HYperspectral Pointable System for Terrestrial and Aquatic Radiometry (HYPSTAR$^®$) has been designed to provide automated, italicin-situ/italic multiangular reflectance measurements of land and water targets. HYPSTAR-SR covers 380–1020 nm spectral range at 3 nm spectral resolution and is used at water sites. For land sites the HYPSTAR-XR variant is used with the spectral range extended to 1680 nm at 10 nm spectral resolution. The spectroradiometer has multiplexed radiance and irradiance entrances, an internal mechanical shutter, and an integrated imaging camera for capturing snapshots of the targets. The spectroradiometer is mounted on a two-axis pointing system with 360° range of free movement in both axes. The system also incorporates a stable light emitting diode as a light source, used for monitoring the stability of the radiometric calibration during the long-term unattended field deployment. Autonomous operation is managed by a host system which handles data acquisition, storage, and transmission to a central WATERHYPERNET or LANDHYPERNET server according to a pre-programmed schedule. The system is remotely accessible over the internet for configuration changes and software updates. The HYPSTAR systems have been deployed at 10 water and 11 land sites for different periods ranging from a few days to a few years. The data are automatically processed at the central servers by the HYPERNETS processor and the derived radiance, irradiance, and reflectance products with associated measurement uncertainties are distributed at the WATERHYPERNET and LANDHYPERNET data portals./p
Located in Library / RBINS Staff Publications 2025
Article Reference Icaphoca choristodon n. gen., n. sp., a new monachine seal (Carnivora, Mammalia) from the Neogene of Peru
Icaphoca choristodon n. gen., n. sp., described in the present study, represents the sixth monachine seal from the Neogene Pisco Formation of Peru. The species is solely known from the holotype, including a cranium with both mandibles, as well as five cervical vertebrae including the atlas and axis. This holotype was collected at the Cerro La Bruja locality, the type locality of Magophoca brevirostris, in the Ica Desert after which Icaphoca has been named. Stratigraphically, the holotype was recovered from strata underlying those of the Cerro La Bruja level (CLB level), from which Magophoca was recovered. These beds likely correspond with the P1-2 unit of the P1 sequence within the Pisco Formation. Assumed to be as old as 9 Ma (middle Tortonian), Icaphoca may be the oldest described monachine seal from the southeast Pacific. Following Magophoca and Noriphoca, Icaphoca is the third extinct monachine seal known to have six upper incisors. This plesiomorphic character is absent in all other extant and extinct Monachinae which have only four upper incisors. The elongation of the snout, as well as the presence of profound diastemas between the postcanine teeth, suggests that Icaphoca is closely related to Acrophoca from the upper Tortonian and Messinian of the Pisco Formation in the Sacaco area (Arequipa Department), c. 200 km southeast to Cerro La Bruja. The specific name choristodon refers to this spacing between the post-canine teeth. The close phylogenetic relationship between Icaphoca and Acrophoca is confirmed by the phylogenetic analysis, which retrieves both genera as sister taxa.
Located in Library / RBINS Staff Publications 2025
Article Reference Ichtyosaurs from the French Rhaetian indicate a severe turnover across the Triassic-Jurassic boundary
Located in Library / RBINS Staff Publications
Article Reference Ideal Free distribution of fixed dispersal phenotypes in a wing dimorphic beetle in heterogeneous landscapes
According to the ideal free distribution (IFD) theory, individuals that are able to perceive the quality of different patches in a landscape and disperse freely are expected to redistribute themselves proportionally to the carrying capacities of heterogeneous patches. Here, we argue that when dispersal is unconditional and genetically fixed, a coalition of sedentary and dispersing phenotypes can attain an IFD under spatio-temporally uncorrelated variation in fitness. This not only leads to a stable polymorphism of both dispersal phenotypes, but also implies that the number of dispersing individuals should on average be equal among patches and determined by the carrying capacity of the smallest local populations in the landscape. Differences in carrying capacity among patches are thus only reflected by changes in the number of sedentary individuals. Individual-based simulations show that this mechanism can be generalized over a wide range of spatio-temporal conditions and dispersal strategies. Moreover, these expectations are in strong agreement with empirical data on the density of both dispersal phenotypes of the wing dimorphic ground beetle Pterostichus vernalis within and among ten different landscapes. Hence, for the first time, these results demonstrate that this mechanism serves as a plausible alternative to the competition-colonization model to explain the spatial distribution of fixed dispersal phenotypes in heterogeneous landscapes. Understanding of the frequency distributions of individuals expressing discrete dispersal morphs moreover improves our predictive and management capabilities for a broad range of species, for which we currently typically rely on using mean dispersal rates.
Located in Library / RBINS Staff Publications
Article Reference Identification of Belgian mosquito species (Diptera: Culicidae) by DNA barcoding
Located in Library / RBINS Staff Publications