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water birds, etc ; biomass; ducks; ecosystems; environment; herbivores; invertebrates; omnivores; piscivores; shorelines; steppes; Kazakhstan; Show all 12 Subjects
Abstract:
... Inland saline waters in Central Asia constitute an important part of steppe ecosystems, providing considerable ecological functions and ecosystem services. Here we aim to present a multi-spatial scale analysis of nutrient cycling and transport waterbird guilds, and the environmental attributes of saline-soda aquatic ecosystems in Kazakhstan. The density, biomass, and diversity of waterbird guilds ...
birds of prey; water birds, etc ; Circus; adults; females; nests; winter; California; Show all 8 Subjects
Abstract:
... Although there are a variety of methods available for trapping raptors, some species, such as Northern Harriers (Circus hudsonius), are not easily captured with standard methods. We tested several existing trapping methods and modified two of them based on Northern Harrier ecology and behavior across seasons in a study population in California. No previously successful methods described in the lit ...
... Animals can time their behaviours at predictable intervals. Their precision for doing so, however, may depend on the duration of the intervals. Laboratory experiments with animals show that timing precision decreases in proportion to the duration of the interval, a phenomenon known as scalar timing. In these experiments, animals are trained to wait for arbitrary intervals of time to get rewarded. ...
... In this Letter, the possibility is raised and evidenced that the published sequence of the avian piroplasm Babesia bennetti is a chimera. This is an important taxonomic and phylogenetic issue, as this unique sequence creates a second clade of avian piroplasms within Babesia sensu stricto. ...
... Knowledge of the higher-level phylogenetic relationships of birds has grown substantially during the past two decades due to the application of genomic data. However, the nomenclature of higher-level taxa has not become more stable, due to the lack of regulation of taxon names above the level of superfamily by the ICZN, and the usage of rank-based nomenclature, which is not tied to clades in a phy ...
... The Mariana's dam collapse was the worst environmental disaster in Brazilian history and one of the biggest worldwide. This perverse disaster resulted in the release of a contaminated mud tsunami that greatly impacted both aquatic and terrestrial biota. The aim of this study was to track environmental impacts resulting from Mariana's disaster using trace-element accumulation in avian blood and fea ...
birds, etc ; biodiversity; brood parasitism; coevolution; Show all 4 Subjects
Abstract:
... The relationships between avian brood parasites and their hosts are widely recognised as model systems for studying coevolution. However, while most brood parasites are known to parasitise multiple species of host and hosts are often subject to parasitism by multiple brood parasite species, the examination of multispecies interactions remains rare. Here, we compile data on all known brood parasite ...
birds, etc ; graphene; humans; nanomaterials; polydimethylsiloxane; Show all 5 Subjects
Abstract:
... Stretchable strain sensors based on nanomaterial thin films have aroused extensive interest for the strain perception of smart skins. However, it still remains challenging to have them achieve high sensitivity over wide linear working ranges. Herein, we propose a facile strategy to fabricate stretchable strain sensors based on Au/graphene composite films (AGCFs) with hierarchical cracks and demons ...
Ryan R. Reisinger; Cassandra M. Brooks; Ben Raymond; Jennifer J. Freer; Cédric Cotté; José C. Xavier; Philip N. Trathan; Horst Bornemann; Jean-Benoit Charrassin; Daniel P. Costa; Bruno Danis; Luis Hückstädt; Ian D. Jonsen; Mary-Anne Lea; Leigh Torres; Anton Van de Putte; Simon Wotherspoon; Ari S. Friedlaender; Yan Ropert-Coudert; Mark Hindell
... Multiple initiatives have called for large-scale representative networks of marine protected areas (MPAs). MPAs should be ecologically representative to be effective, but in large, remote regions this can be difficult to quantify and assess. We present a novel bioregionalization for the Southern Ocean, which uses the modelled circumpolar habitat importance of 17 marine bird and mammal species. The ...
... The plant hormone salicylic acid (SA) receptor NONEXPRESSOR OF PATHOGENESIS-RELATED PROTEINS1 (NPR1) plays a critical role for plant defense against biotrophic and hemi-biotrophic pathogens. In a milestone paper, Kumar, Zavaliev, Wu et al. unraveled the structural basis for the assembly of an enhanceosome by NPR1 in activating the expression of plant defense genes. ...
... Adult barn owls and primates possess an almost symmetric monocular rotational horizontal optocollic reflex. In primates, the reflex is initially asymmetric and becomes symmetric with time after birth. The condition in barn owls has not been studied so far. Here, we present data on the development of this reflex in this bird. We tested juvenile barn owls from the time before they open their eyes af ...
... Background: Exotic pets are increasingly being presented to veterinary practices. Familiarity with basic handling techniques of commonly presented species helps significantly in building client confidence and improving the client bond with the practice. Basic handling skills are integral in enabling a clinical examination, as well as being the first step in obtaining appropriate diagnostic samples ...
birds, etc ; biogeography; habitats; landscapes; phylogeny; Show all 5 Subjects
Abstract:
... AIM: How β‐diversity patterns are shaped by landscape‐level processes remains unclear across habitat island systems. Here we assessed landscape‐level bird β‐diversity in habitat island systems and aimed to (1) evaluate the relative contribution of turnover (βSIM) and nestedness‐resultant (βSNE) components to multisite β‐diversity (βSOR) from taxonomic, functional and phylogenetic dimensions; (2) e ...
migratory birds; water birds, etc ; Podiceps grisegena; brood rearing; ecology; females; fledglings; males; monogamy; probability; reproductive success; sociobiology; Show all 12 Subjects
Abstract:
... In monogamous birds, pair bond maintenance is often dependent on previous breeding success and each parent’s effort, because partners gain information about one another’s quality and contribution to brood rearing. The asymmetries between mates in parental investment have been theoretically linked to a sexual conflict of interests. Year-to-year pair fidelity decisions in relation to birds’ previous ...
forest birds; water birds, etc ; biogeography; forests; geographical distribution; habitats; inventories; land cover; landscapes; life history; Czech Republic; Show all 11 Subjects
Abstract:
... The representation of a land cover type (i.e. habitat) within an area is often used as an explanatory variable in species distribution models. However, it is possible that a simple binary presence/absence of the suitable habitat might be the most important determinant of the presence/absence of some species and, thus, be a better predictor of species occurrence than the continuous parameter (area) ...
birds, etc ; Sternula; adaptive management; wetlands; Italy; Show all 5 Subjects
Abstract:
... We applied two recent approaches largely used in biological conservation: Threat Analysis (TAN) and Threat Reduction Assessments (TRAs), assessing the effectiveness of a project focused on two water-related bird species (common tern, Sterna hirundo and little tern, Sternula albifrons), commonly breeding in some wetlands of Italy. We used the IUCN standardized lexicon for the classification of thre ...
birds, etc ; collagen; dermis; embryogenesis; extracellular matrix; Show all 5 Subjects
Abstract:
... During vertebrate embryogenesis, cell collectives engage in coordinated behavior to form tissue structures of increasing complexity. In the avian skin, assembly into follicles depends on intrinsic mechanical forces of the dermis, but how cell mechanics initiate pattern formation is not known. Here, we reconstitute the initiation of follicle patterning ex vivo using only freshly dissociated avian d ...
... Species with large local abundances tend to occupy more sites. One of the mechanisms proposed to explain this widely reported inter-specific relationship is a cross-scale hypothesis based on dynamics at the population level. Called the vital rates mechanism; it uses within-population demographic processes of population growth and density dependence to predict when inter-specific abundance–occupanc ...
birds, etc ; Passeriformes; ecosystems; rivers; summer; India; Show all 6 Subjects
Abstract:
... The bird diversity using line transect method along the 45 km stretch of Saryu river between Aharauli and Pitapur in eastern Uttar Pradesh was assessed.Atotal of sixty eight bird species, belonging to 56 genera, 35 families and 12 orders were recorded from the study area. Passeriformes (24) had the maximum number of bird species. The maximum encounter rate was for Indian Silverbill (2.685) and the ...
birds, etc ; applied ecology; habitats; landscapes; Australia; Show all 5 Subjects
Abstract:
... Locations that support high densities of a species (‘population hotspots’) often have a disproportionate influence on species' persistence. In fire‐prone ecosystems, managers attempting to promote population hotspots of multiple species must understand how hotspot locations might shift with post‐fire succession and how much overlap exists in the locations of population hotspots for multiple specie ...