212 research outputs found
Tidal wetland restoration at Ketenisse polder (Schelde Estuary, Belgium): developments in the first year
Ketenisse polder is a former intertidal brackish marsh (30ha) situated in the mesohaline part of the Schelde Estuary. In the 19th century its central part was embanked as a polder. In the mid 1980’s the area was raised above intertidal level when it was used as a dumping site for the excavated soil from the Liefkenshoek tunnel. In 2002 the area was restored, it was levelled with a weak slope below mean high water level, creating the optimal starting conditions for the development of intertidal mudflats and marshes. Geomorphological changes, sediment characteristics and colonisation by phytobenthos, vegetation, zoobenthos, water birds and breeding birds at the restored site are monitored. The monitoring results of the first year after tidal restoration are presented. Sedimentation as well as erosion between 0 and 30cm was observed in the first year. Local changes in stream current patterns caused erosion on parts of the former mudflats; sheltered depressions filled up relatively fast. Median grain size showed large variation. Organic carbon content of the sediment varied between 0.5 and 15% and was closely related to sediment medium grain size. Chlorophyll a concentrations were negatively correlated with median grain size and tended to increase from the low water line to the shore. They were comparable to nearby intertidal areas and displayed similar seasonal variability with a maximum in spring. The large surface covered wtithVaucheria was indicator of initiated succession towards tidal marsh. Scirpus maritimus and transitional vegetations to Chenopodiaceae-vegetations established with increasing altitude. The Chenopodiaceae-vegetations were relicts of earlier vegetations before the tidal restoration, and will probably disappear. The macrobenthos community was dominated by Oligochaetes, which were present in 73% of all samples and attained an average density of about 40*103 ind. m-2. Other macrobenthos species found were nematods, copepods and Corophium. On the sheltered sampling stations macrobenthic densities were high compared to those on nearby intertidal areas. In the first season, 15 breeding bird species were recorded, the most common species being the Pied Avocet (Recurvirostra avosetta). The most common waterbirds were Common Shelduck (Tadorna tadorna), Greylag Goose (Anser anser), Pied Avocet (Recurvirostra avoset) and Lapwing (Vanellus vanellus), typical species for the mesohaline part of the estuary. The first year’s results suggest that Ketenisse polder has the potential to develop towards a varied and normal functional intertidal area
Evidence of Hantavirus Infection among Bats in Brazil
Citation: Sabino-Santos, G., Maia, F. G. M., Vieira, T. M., Muylaert, R. D., Lima, S. M., Goncalves, C. B., . . . Figueiredo, L. T. M. (2015). Evidence of Hantavirus Infection among Bats in Brazil. American Journal of Tropical Medicine and Hygiene, 93(2), 404-406. doi:10.4269/ajtmh.15-0032Hantaviruses are zoonotic viruses harbored by rodents, bats, and shrews. At present, only rodent-borne hantaviruses are associated with severe illness in humans. New species of hantaviruses have been recently identified in bats and shrews greatly expanding the potential reservoirs and ranges of these viruses. Brazil has one of the highest incidences of hantavirus cardiopulmonary syndrome in South America, hence it is critical to know what is the prevalence of hantaviruses in Brazil. Although much is known about rodent reservoirs, little is known regarding bats. We captured 270 bats from February 2012 to April 2014. Serum was screened for the presence of antibodies against a recombinant nucleoprotein (rN) of Araraquara virus (ARAQV). The prevalence of antibody to hantavirus was 9/53 with an overall seroprevalence of 17%. Previous studies have shown only insectivorous bats to harbor hantavirus; however, in our study, of the nine seropositive bats, five were frugivorous, one was carnivorous, and three were sanguivorous phyllostomid bats
Atlantic mammal traits: a dataset of morphological traits of mammals in the atlantic forest of south America
Measures of traits are the basis of functional biological diversity. Numerous works consider mean species-level measures of traits while ignoring individual variance within species. However, there is a large amount of variation within species and it is increasingly apparent that it is important to consider trait variation not only between species, but also within species. Mammals are an interesting group for investigating trait-based approaches because they play diverse and important ecological functions (e.g., pollination, seed dispersal, predation, grazing) that are correlated with functional traits. Here we compile a data set comprising morphological and life history information of 279 mammal species from 39,850 individuals of 388 populations ranging from −5.83 to −29.75 decimal degrees of latitude and −34.82 to −56.73 decimal degrees of longitude in the Atlantic forest of South America. We present trait information from 16,840 individuals of 181 species of non-volant mammals (Rodentia, Didelphimorphia, Carnivora, Primates, Cingulata, Artiodactyla, Pilosa, Lagomorpha, Perissodactyla) and from 23,010 individuals of 98 species of volant mammals (Chiroptera). The traits reported include body mass, age, sex, reproductive stage, as well as the geographic coordinates of sampling for all taxa. Moreover, we gathered information on forearm length for bats and body length and tail length for rodents and marsupials. No copyright restrictions are associated with the use of this data set. Please cite this data paper when the data are used in publications. We also request that researchers and teachers inform us of how they are using the data.Fil: Gonçalves, Fernando. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Bovendorp, Ricardo S.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Beca, Gabrielle. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Bello, Carolina. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Costa Pereira, Raul. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Muylaert, Renata L.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Rodarte, Raisa R.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Villar, Nacho. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Souza, Rafael. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Graipel, Maurício E.. Universidade Federal de Santa Catarina; BrasilFil: Cherem, Jorge J.. Caipora Cooperativa, Florianopolis; BrasilFil: Faria, Deborah. Universidade Estadual de Santa Cruz; BrasilFil: Baumgarten, Julio. Universidade Estadual de Santa Cruz; BrasilFil: Alvarez, Martín R.. Universidade Estadual de Santa Cruz; BrasilFil: Vieira, Emerson M.. Universidade do Brasília; BrasilFil: Cáceres, Nilton. Universidade Federal de Santa María. Santa María; BrasilFil: Pardini, Renata. Universidade de Sao Paulo; BrasilFil: Leite, Yuri L. R.. Universidade Federal do Espírito Santo; BrasilFil: Costa, Leonora Pires. Universidade Federal do Espírito Santo; BrasilFil: Mello, Marco Aurelio Ribeiro. Universidade Federal de Minas Gerais; BrasilFil: Fischer, Erich. Universidade Federal do Mato Grosso do Sul; BrasilFil: Passos, Fernando C.. Universidade Federal do Paraná; BrasilFil: Varzinczak, Luiz H.. Universidade Federal do Paraná; BrasilFil: Prevedello, Jayme A.. Universidade do Estado de Rio do Janeiro; BrasilFil: Cruz-Neto, Ariovaldo P.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Carvalho, Fernando. Universidade do Extremo Sul Catarinense; BrasilFil: Reis Percequillo, Alexandre. Universidade de Sao Paulo; BrasilFil: Paviolo, Agustin Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Puerto Iguazú | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Puerto Iguazú; ArgentinaFil: Duarte, José M. B.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil. Fundación Oswaldo Cruz; BrasilFil: Bernard, Enrico. Universidade Federal de Pernambuco; BrasilFil: Agostini, Ilaria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Puerto Iguazú | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Puerto Iguazú; ArgentinaFil: Lamattina, Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Ministerio de Salud de la Nación; ArgentinaFil: Vanderhoeven, Ezequiel Andres. Ministerio de Salud de la Nación; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentin
Een 18de-eeuwse wraksite op de Buiten Ratel-zandbank (Belgische territoriale wateren): 1. Multidisciplinair onderzoek van het vondstenmateriaal
In 1996 werd op de Buiten Ratel-zandbank, op 9 mijl van de kust, ter hoogte van Koksijde, een houten scheepswrak gelokaliseerd. Het werd onderzocht door een groep sportduikers, met de naam NATA. Jarenlange verkenning van de wraksite leverde talrijke vondsten op. In 2003 zochten de duikers steun bij het toenmalige IAP (Instituut voor het Archeologisch Patrimonium), nu Vlaams Instituut voor het Onroerend Erfgoed (VIOE), om het onderzoek en de conservatie op wetenschappelijke basis verder te zetten. Het VIOE ontfermde zich over het onderzoek van de tot nu toe geborgen materiële resten van de wraksite.
Het eerste hoofdstuk van het artikel geeft een overzicht van de observaties van de wraksite via duikonderzoek en via gespecialiseerde technieken vanop een onderzoeksschip. In hoofdstuk 2 worden de objecten beschreven, hun betekenis aan boord van het schip besproken, evenals hun datering en herkomst. Hoofdstuk 3 brengt alle informatie samen en geeft aan wat er in de toekomst nog aan onderzoek kan gebeuren
De visserskaai te Oostende (prov. West-Vlaanderen): archeologie van een in de 17de eeuw zwaar geteisterde stad
The Institute for the Archaeological Heritage of the Flemish Community (IAP) has, in close collaboration with the town of Ostend, carried out archaeological excavations during the construction works of the car park below the Visserskaai at Ostend from September 1998 till February 1999. This archaeological work mainly produced information on the eastern ramparts of Ostend and their evolution from the 16th century onwards together with information on the material culture of the inhabitants of Ostend during this same period. The town of Ostend had no defences until late in the 16th century as initial construction work for the defences only started in 1572 when the town came into northern hands. In the beginning of the 17th century Ostend managed to withstand successfully, with its newly built ramparts, for three years an overwhelming Spanish army siege. This was only possible thanks to the fact that the Spaniards never managed to seal of Ostend completely from the sea. As a result, victuals and soldiers arrived continuously at Ostend during the siege. It was only after the arrival of Spinola in the besieging camp, at the end of 1603, that Ostend was gradually forced to surrender. At the bottom of the excavated car park trench, some 4 m below the actual street level, wooden structures of the earthen ramparts were preserved (figs. 4-5). The presence of these con- firms historical data about the use of wood to strengthen the earthen ramparts. The excavations however documented mainly features from 2 bastions, the Peckels bastion and the Spanish bastion (fig. 2-3). Human burials and a gunpowder-magazine (figs. 7, 8, 10, 12) were uncovered in the Peckels bastion and human burials and an open-air rainwater reservoir were detected in the Spanish bastion. The human burials are studied elsewhere in this volume together with other post-medieval burials from Ostend recently discovered outside regular cemeteries. Archaeological material found in connection with the gunpowder-magazine in the Peckelf bastion dates from the 2nd half of the 16th /1st half of the 17th century (figs. 6,9,13-15) and suggests that the construction of this gunpowder-magazine? has to be situated somewhere in the middle of the 17th century, in other words in the period when the town defences of Ostend were adapted to new standards after the above- mentioned siege. A typical object related to the siege is a funnel-shaped gunpowder-flask in a copper-alloy (fig. 6). The inner wall of the gunpowder-magazine was erected on a framework of horizontal wooden beams, which were themselves resting on vertically placed and sharpened beams, mainly in oak (fig. 8). A dendrochronological analysis of the vertically placed beams produced a terminus post quem, which is far too early to be of any help in the discussion on the gunpowder-magazine. The technical differences between the inner and outer wall of the gunpowder-magazine suggest at least 2 phases for this building. The above-mentioned ceramics consist of redwares, Rhenish stone- wares a.o. Raeren, maiolicas, Weser slipwares, olive jars from Seville and some whitewares with green or yellow glaze. The archaeological material from the open- air rainwater reservoir in the Spanish bastion dates from the 2nd half of the 17th/1st half of the 19th century but mainly from the 18th century (figs. 16-32). The collection of ceramics from this context is largely dominated by tablewares. Among these stonewares are nearly missing and replaced by faience, china and industrial white- wares (pearl and cream wares). Maiolica has been nearly completely replaced by faience. Maiolicas remain in fact only important as wall-tiles. The collection contains some olive jars from Seville, a bowl from Dèsvres and a few products from Beauvais. The collection of china mainly consists of cups and small dishes in blue and white china. The china has been brought to Ostend in great quantities in the 18th century, first by the Ostend Company and later by mariners from Ostend in Foreign Service, mainly as ship's ballast. Besides ceramics this context also produced several finds in leather, glass, stone and metal. The leather finds mainly consist of shoes. The glass collection is largely dominated by cylindrical and globular bottles of which one was still intact including its cork (fig. 26: 1). Metal is represented by 22 cast iron cannon balls (fig. 28) and by a standard measure for bottles from an unidentified town inspector of measures and weights of Ostend with GS initials (fig. 27: 8). Small quantities of animal remains were found dispersed over many contexts within the site's stratigraphy. Only three of them are meaningful: a deposit found under the floor of the gunpowder-magazine (table 1: context A), an assemblage excavated in leveling layers within the Peckels bastion (table 1: context B), and material found in the water reservoir in the Spanish bastion (table 1: context C). All connections consisted of larger material; sieved samples did not yield meaningful numbers of smaller animal remains. Context A dates from the second half of the 16th to the first half of the 17th century and consists of consumption refuse: marine molluscs, marine fish bones, bird bone and the remains of cattle, sheep and pig. Context B is contemporaneous to context A and also represents consumption refuse with a similar composition. Remarkable are only a series of vertebrae of a large specimen of ling, a fish that must have been caught in northern waters, and a number of skeletal elements of a gurnard species. Context C has a younger date (second half of the 17th century to the first half of the 19th century) and has a mixed origin in terms of the taphonomy of the animal remains. Not only consumption refuse is present but also parts of the skeletons of at least four dogs and a horse. It is possible that all three contexts represent secondary refuse; in any case their provenance remains unknown. The material certainly has limited value for the interpretation of former consumption patterns. A feature of special interest is the presence of a few cowrie shells. Several aspects of the material culture reflect the maritime character of the town: the presence of several imports such as olive jars from Seville and specific objects as a token in lead (fig. 13: 16) probably used by skippers for the payment of fees and/or tolls. The presence of an important percentage of china and of some cowrie shells is probably related to the activities of the Ostend Company in the l8th century. The pottery discovered from both contexts (2nd half 16th century/ 1 st half 17th century and 2nd half 17th century/ 1st half 19th century) follows the general trends described for post-medieval Flanders
The relative effects of upwelling and river flow on the phytoplankton diversity patterns in the ria of A Coruña (NW Spain)
Phytoplankton species assemblages in estuaries are connected to those in rivers and marine environments by local hydrodynamics leading to a continuous flow of taxa. This study revealed differential effects of upwelling and river flow on phytoplankton communities observed in 2011 along a salinity gradient from a river reservoir connected to the sea through a ria-marine bay system in A Coruña (NW Spain, 43° 16-21’ N, 8° 16-22’ W). With 130 phytoplankton taxa identified, the assemblages were dominated in general by diatoms, particularly abundant in the bay and in the estuary, but also by chlorophycea and cyanobacteria in the reservoir. Considering the entire seasonal cycle, the local assemblages were mainly characterized by changes in cryptophytes and diatoms, small dinoflagellates and some freshwater chlorophycea. Salinity, nitrate, and organic matter variables, were the main environmental factors related to the changes in the phytoplankton communities through the system, while phosphate and nitrite were also important for local communities in the estuary and the bay, respectively. The corresponding local phytoplankton assemblages showed moderate levels of connectivity. The estuarine community shared a variable number of taxa with the adjacent zones, depending on the relative strength of upwelling (major influence from the bay) and river flow (major influence of the reservoir) but had on average 35% of unique taxa. Consequently, local and zonal diversity patterns varied seasonally and were not simply related to the salinity gradient driven by the river flow.ANILE (CTM2009-08396 and CTM2010-08804-E), FIOME (CTM2011-28792-C02-01-MAR), and MEFIO (CTM2011-28792-C02-02-MAR) of the Plan Nacional de I+D+i (Spain), and RADIALES of the Instituto Español de Oceanografía (IEO, Spain).Versión del editor2,01
The future of zoonotic risk prediction
In the light of the urgency raised by the COVID-19 pandemic, global investment in wildlife virology is likely to increase, and new surveillance programmes will identify hundreds of novel viruses that might someday pose a threat to humans. To support the extensive task of laboratory characterization, scientists may increasingly rely on data-driven rubrics or machine learning models that learn from known zoonoses to identify which animal pathogens could someday pose a threat to global health. We synthesize the findings of an interdisciplinary workshop on zoonotic risk technologies to answer the following questions. What are the prerequisites, in terms of open data, equity and interdisciplinary collaboration, to the development and application of those tools? What effect could the technology have on global health? Who would control that technology, who would have access to it and who would benefit from it? Would it improve pandemic prevention? Could it create new challenges? This article is part of the theme issue 'Infectious disease macroecology: parasite diversity and dynamics across the globe'.Peer reviewe
Influence of selected environmental factors on the abundance of aerobic anoxygenic phototrophs in peat-bog lakes
Historical responsibility for climate change: science and the science–policy interface
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