Landscape fires disproportionally affect high conservation value temperate peatlands, meadows, and deciduous forests, but only under low moisture conditions.

Landscape fires are a natural component of the Earth System. However, they are of growing global concern due to climate change exacerbating their multiple impacts on biodiversity, ecosystems, carbon storage, human health, economies, and wider society. Temperate regions are predicted to be at greatest risk of increasing fire activity due to climate change, where fires can seriously impact important ecosystems for biodiversity and carbon storage, such as peatlands and forests. There is insufficient literature on the background prevalence, distribution, and drivers of fires in these regions, especially within Europe, to assess and mitigate their risks. Using a global database of fire patches based on the MODIS FireCCI51 product, we address this knowledge gap by quantifying the current prevalence and size of fires in Polesia, a 150,000 km2 area comprising a mosaic of peatland, forest, and agricultural habitats in northern Ukraine and southern Belarus. Between 2001 and 2019, fires burned 31,062 km2 of land, and were most frequent in spring and autumn. Although most fires started in agricultural land, fires disproportionately affected natural and semi-natural land cover types, particularly in protected areas. Over one fifth of protected land burned. Coniferous forests were the most common land cover type in protected areas, but fires mostly occurred in meadows, open peatlands (especially fen and transition mires), and native deciduous forests. These land cover types were highly susceptible to fires under low soil moisture conditions, but the risk of fire was low under average or higher soil moisture conditions. Restoring and maintaining natural hydrological regimes could be an effective nature-based solution to increase the resilience of fire-vulnerable ecosystems and support global biodiversity and carbon storage commitments under the United Nations Framework Conventions on Climate Change and Convention on Biological Diversity.

UAV RGB, thermal infrared and multispectral imagery used to investigate the control of terrain on the spatial distribution of dryland biocrust.

Biocrusts (topsoil communities formed by mosses, lichens, bacteria, fungi, algae, and cyanobacteria) are a key biotic component of dryland ecosystems. Whilst climate patterns control the distribution of biocrusts in drylands worldwide, terrain and soil attributes can influence biocrust distribution at landscape scale. Multi-source unmanned aerial vehicle (UAV) imagery was used to map and study biocrust ecology in a typical dryland ecosystem in central Spain. Red, green and blue (RGB) imagery was processed using structure-from-motion techniques to map terrain attributes related to microclimate and terrain stability. Multispectral imagery was used to produce accurate maps (accuracy > 80%) of dryland ecosystem components (vegetation, bare soil and biocrust composition). Finally, thermal infrared (TIR) and multispectral imagery was used to calculate the apparent thermal inertia (ATI) of soil and to evaluate how ATI was related to soil moisture (r 2 = 0.83). The relationship between soil properties and UAV-derived variables was first evaluated at the field plot level. Then, the maps obtained were used to explore the relationship between biocrusts and terrain attributes at ecosystem level through a redundancy analysis. The most significant variables that explain biocrust distribution are: ATI (34.4% of variance, F = 130.75; p < 0.001), Elevation (25.8%, F = 97.6; p < 0.001), and potential solar incoming radiation (PSIR) (52.9%, F = 200.1; p < 0.001). Differences were found between areas dominated by lichens and mosses. Lichen-dominated biocrusts were associated with areas with high slopes and low values of ATI, with soil characterized by a higher amount of soluble salts, and lower amount of organic carbon, total phosphorus (Ptot) and total nitrogen (Ntot). Biocrust-forming mosses dominated lower and moister areas, characterized by gentler slopes and higher values of ATI with soils with higher contents of organic carbon, Ptot and Ntot. This study shows the potential to use UAVs to improve our understanding of drylands and to evaluate the control that the terrain has on biocrust distribution.

Nitrogen cycling in pastoral livestock systems in Sub-Saharan Africa: knowns and unknowns.

Pastoral systems are the dominant livestock production system in arid and semiarid regions of sub-Saharan Africa (SSA). They are often the only form of agriculture that can be practiced due to unfavorable climate and soil fertility levels that prevent crop cultivation. Pastoralism can have negative impacts on the environment, including land degradation, greenhouse gas emissions and other gases to the atmosphere, soil erosion, water pollution and biodiversity loss. Here, we review the current knowledge on nitrogen (N) cycling, storage, and loss pathways, with an emphasis on identification of N emission hotspots. Our review reports a large uncertainty in the amount of N lost as ammonia from excreta and manure storage, as well as N losses via nitrate and DON leaching. We also found that another major N loss pathway (18%), soil N2 emissions, has not yet been measured. In order to summarize the available information, we use a virtual pastoral farm, with characteristics and management practices obtained from a real farm, Kapiti Research Station in Kenya. For outlining N flows at this virtual farm, we used published data, data from global studies, satellite imagery and geographic information system (GIS) tools. Our results show that N inputs in pastoral systems are dominated by atmospheric N deposition (˜80%), while inputs due to biological nitrogen fixation seems to play a smaller role. A major N loss pathway is nitrogen leaching (nitrate > DON) from pastures (33%). Cattle enclosures (bomas), where animals are kept during night, represent N emissions hotspots, representing 16% of the total N losses from the system. N losses via ammonia volatilization and N2 O were four and three orders of magnitude higher from bomas than from the pasture, respectively. Based on our results, we further identify future research requirements and highlight the urgent need for experimental data collection to quantify nitrogen losses from manure in animal congregation areas. Such information is needed to improve our understanding on N cycling in pastoral systems in semiarid regions and to provide practical recommendations for managers that can help with decision-making on management strategies in pastoral systems in semiarid savannas.

Experimental and modeling studies of B atom number density distributions in hot filament activated B2H6/H2 and B2H6/CH4/H2 gas mixtures.

Experimental and modeling studies of the gas-phase chemistry occurring in dilute, hot filament (HF) activated B2H6/H2 and B2H6/CH4/H2 gas mixtures are reported. Spatially resolved relative number densities of B (and H) atoms have been measured by resonance enhanced multiphoton ionization methods, as a function of process conditions (e.g. the HF material and its temperature, the B2H6/H2 mixing ratio, and the presence (or not) of added CH4). Three-dimensional modeling of the H/B chemistry prevailing in such HF activated gas mixtures using a simplified representation of the gas phase chemistry succeeds in reproducing all of the experimentally observed trends, and in illustrating the key role of the "H-shifting" reactions BHx + H <= => BHx-1 + H2 (x = 1-3) in enabling rapid interconversion between the various BHx (x = 0-3) species. CH4 addition, at partial pressures appropriate for growth of boron-doped diamond by chemical vapor deposition methods, leads to approximately 30% reduction in the measured B atom signal near the HF. The modeling suggests that this is mainly due to concomitant H atom depletion near the HF, but it also allows us a first assessment of the possible contributions from B/C coupling reactions upon CH4 addition to HF activated B2H6/H2 gas mixtures.

The radiological appearance of recurrent phalangeal sarcoidosis.

Sarcoidosis of the phalanx is rare and is usually associated with severe systemic disease. We present a patient with recurrent phalangeal sarcoidosis and new evidence of a changing radiological pattern. The clinical presentation and outcome is discussed. High dose steroid treatment and careful long-term follow-up is recommended.

Survey of pertussis morbidity in adults in western Sydney.

OBJECTIVE: To estimate morbidity due to Bordetella pertussis infection in a representative population of Australian adults. DESIGN: Telephone survey using structured questionnaire. PARTICIPANTS: Adults (aged 20 years and over) notified with pertussis to a public health unit in western Sydney between 1 December 1997 and 31 May 1998. MAIN OUTCOME MEASURES: Duration of cough; time to improvement; symptoms and complications; time to diagnosis; health resource use; lost work days. RESULTS: Of 90 eligible patients, 73 (81%) completed questionnaires. Cough lasted a median of 60 days, but persisted over 90 days in 20 people (27%). Presentation was within a median of seven days of symptom onset, but diagnosis of pertussis took a median of 21 days. Participants reported a mean of 3.7 general practitioner visits and 1.2 prescription drugs. Of those employed, 17 (35%) missed more than five work days (range, 0-93 days). CONCLUSIONS: B. pertussis infection in adults can result in prolonged, significant disruption to social and working life. Results suggest that, in 1998, there were more than 8000 general practitioner visits and 15,000 lost work days caused by pertussis in Australian adults.

Psychiatric morbidity and compulsory admission among UK-born Europeans, Afro-Caribbeans and Asians in central Manchester.

Psychiatric admissions in Central Manchester of Europeans, Afro-Caribbeans, and Asians (within three age-bands) were studied over four years. Among the Afro-Caribbean group there were more single or unemployed persons than in either the Asian or European groups, which suggested greater socio-economic disadvantage. Rates for first admissions and readmissions among Afro-Caribbeans were greater; among Asians they were similar except for the 16-29-year age-group, who tended to have lower rates than Europeans. A higher proportion of Afro-Caribbeans and Asians were psychotic. In the Afro-Caribbean group, the raised rates of admission were largely attributable to increased rates of schizophrenia. The highest rate occurred in second-generation (UK-born) Afro-Caribbeans and was nine times that among Europeans. The police were more frequently involved in the admissions of Afro-Caribbeans compared with Europeans or Asians. Higher proportions of Afro-Caribbeans and Asians who were readmitted were detained under the Mental Health Act 1983, when compared with Europeans.

Psychiatric morbidity and compulsory admission among UK-born Europeans, Afro - Caribbeans and Asians in central Manchester

Psychaitry admissions in Central Manchester of Europeans, Afro-Caribbeans, and Asians (within three age-bands) were studied over four years. Among the Afro-Caribbean group there were more single or unemployed persons than in either the Asian or European groups, which suggested greater socio-economic disadvantages. Rates for first admissions and readmissions among Afro-Caribbeans were greater; among Asians they were similar except for the 16-29-year age-group, who tended to have lower rates than Europeans. A higher proportion of Afro-Caribbean and Asians were psychotic. In the Afro-Caribbean group, the raised rates of admission were largely attributable to increase rates of schizophrenia. The highest rate occurred in second-generation (UK-born) Afro-Caribbeans and was nine times that among Europeans. The police were more frequently involved in the admissions of Afro-Caribbean compared with Europeans or Asians. Higher proportions of Afro-Caribbeans and Asians who were readmitted were detained under the Mental Health Act 1983, when compared with Europeans (AU)

Computer-assisted linguistic analysis of an autistic adolescent's language: implications for the diagnosis of Aspberger's syndrome and atypical psychoses.

This study illustrates the use of a computer-assisted linguistic analysis technique to compare the spoken language of an adolescent, diagnosed in childhood as autistic, with that of normal and schizophrenic individuals. A distinctive profile, in keeping with accounts in the literature of autistic speech, was noted to be radically different from that found in linguistic analysis of schizophrenic speech. This distinctive profile was mirrored by her written linguistic analysis. Changes indicative of some improvement in language function were seen on re-recording after 5 years. Implications of this technique for differential diagnosis of Aspberger's syndrome and atypical psychoses are mentioned.

Fragment D-dimer levels: an objective marker of vaso-occlusive crisis and other complications of sickle cell disease.

Although abnormalities in coagulation tests have been reported during vaso-occlusive crises in patients with sickle cell disease, objective, readily performed laboratory tests that document the occurrence of this complication have not been available. We examined the relationship between fibrin D-dimer levels and the occurrence of complications in patients with sickle cell disease, using a commercially available latex bead agglutination assay. The patients were either asymptomatic, hospitalized for vaso-occlusive crisis, or had other complications of sickle cell disease including leg ulcers, chronic cholecystitis, aseptic necrosis, joint pain and infection. Fifty-seven percent of 187 samples on 96 patients had elevated levels of fibrin D-dimer. Ninety percent of 75 samples from asymptomatic patients were negative for fibrin D-dimer (less than 1 microgram/ml) but 97% of 29 samples from patients with vaso-occlusive crisis and 85% of 83 samples from patients with other complications of sickle cell disease were positive. In serial studies, worsening or amelioration in clinical complications were reflected in increasing or decreasing levels of fibrin D-dimer, respectively. The molecular species of fibrin identified by the latex agglutination test was shown to be fragment D-dimer by successive immunoprecipitation and protein blot analysis. We conclude that the complications of sickle cell disease, including vaso-occlusive crisis, result in the production of fibrin D-dimer, and its detection may be used as a marker for the presence of the complication.

Postnatal depression and child development. A three-year follow-up study.

This study investigates whether three-year-old children whose mothers had been depressed after their birth showed more behaviour disturbance than children of mothers who were not depressed at that time. Ninety-one of 103 mothers who took part in an earlier prospective study of postnatal depression were reinterviewed three years later to determine their present mental state, and to assess their child's behaviour, using Richman's Behavioural Screening Questionnaire. No relationship was found between a prolonged postnatal depression and behaviour disturbance in the child, but children whose mothers had brief postnatal depressive episodes showed more behaviour disturbance than those whose mothers had not been depressed since childbirth.