Functional structure of ant and termite assemblages in old growth forest, logged forest and oil palm plantation in Malaysian Borneo

Forested tropical landscapes around the world are being extensively logged and converted to agriculture, with serious consequences for biodiversity and potentially ecosystem functioning. Here we investigate associations between habitat disturbance and functional diversity of ants and termites—two numerically dominant and functionally important taxa in tropical rain forests that perform key roles in predation, decomposition, nutrient cycling and seed dispersal. We compared ant and termite occurrence and composition within standardised volumes of soil and dead wood in old growth forest, logged forest and oil palm plantation in Sabah, Malaysian Borneo. Termites occurred substantially less frequently in converted habitats than in old growth forest, whereas ant occurrences were highest in logged forest and lowest in old growth forest. All termite feeding groups had low occurrence in disturbed habitats, with soil feeders occurring even less frequently than wood feeders. Ant functional groups showed more variable associations, with some opportunist and behaviourally dominant groups being more abundant in degraded habitats. The importance of ants and termites in tropical ecosystems and such differing patterns of assemblage variation suggest that ecosystem functioning may be significantly altered in converted habitats.During this project SHL was funded by the Sime Darby Foundation (through SAFE), the UK Natural Environment Research Council (NERC), The University of East Anglia and The Sir Philip Reckitt Educational Trust. TMF was funded by a NERC small project grant (NE/H011307/1), the project Biodiversity of Forest Ecosystems CZ.1.07/2.3.00/20.0064 co-financed by the European Social Fund and the state budget of the Czech Republic, an Australian Research Council Discovery Grant (DP140101541), and a Czech Science Foundation standard grant (14-32302S).This is the author accepted manuscript. The final version has been published by Springer in Biodiversity and Conservation. It can be found here: http://link.springer.com/article/10.1007%2Fs10531-014-0750-2

Ant mosaics in Bornean primary rain forest high canopy depend on spatial scale, time of day, and sampling method.

Background: Competitive interactions in biological communities can be thought of as giving rise to "assembly rules" that dictate the species that are able to co-exist. Ant communities in tropical canopies often display a particular pattern, an "ant mosaic", in which competition between dominant ant species results in a patchwork of mutually exclusive territories. Although ant mosaics have been well-documented in plantation landscapes, their presence in pristine tropical forests remained contentious until recently. Here we assess presence of ant mosaics in a hitherto under-investigated forest stratum, the emergent trees of the high canopy in primary tropical rain forest, and explore how the strength of any ant mosaics is affected by spatial scale, time of day, and sampling method. Methods: To test whether these factors might impact the detection of ant mosaics in pristine habitats, we sampled ant communities from emergent trees, which rise above the highest canopy layers in lowland dipterocarp rain forests in North Borneo (38.8-60.2 m), using both baiting and insecticide fogging. Critically, we restricted sampling to only the canopy of each focal tree. For baiting, we carried out sampling during both the day and the night. We used null models of species co-occurrence to assess patterns of segregation at within-tree and between-tree scales. Results: The numerically dominant ant species on the emergent trees sampled formed a diverse community, with differences in the identity of dominant species between times of day and sampling methods. Between trees, we found patterns of ant species segregation consistent with the existence of ant mosaics using both methods. Within trees, fogged ants were segregated, while baited ants were segregated only at night. Discussion: We conclude that ant mosaics are present within the emergent trees of the high canopy of tropical rain forest in Malaysian Borneo, and that sampling technique, spatial scale, and time of day interact to determine observed patterns of segregation. Restricting sampling to only emergent trees reveals segregatory patterns not observed in ground-based studies, confirming previous observations of stronger segregation with increasing height in the canopy.Kalsum M. Yusah was funded by the South East Asia Rainforest Research Partnership (SEARRP), a Malaysian Ministry of Higher Education Fundamental Research Grant (FRG0373- STWN- 1/ 2014), and a Universiti Malaysia Sabah New Lecturer Grant Scheme grant (SLB0071- STWN- 2013). Tom M. Fayle was funded by a Czech Science Foundation standard grant (16-09427S)

Minactivin expression in human monocyte and macrophage populations

Adherent monolayer cultures of human blood monocytes, peritoneal macrophages, bone marrow macrophages, and colonic mucosa macrophages were examined for their ability to produce and secrete minactivin, a specific inactivator of urokinase-type plasminogen activator. All except colonic mucosa macrophages produced and secreted appreciable amounts of minactivin, but only blood monocytes were stimulated by muramyl dipeptide (adjuvant peptide) to increase production. The minactivin from each of these populations could be shown to preferentially inhibit urokinase-type plasminogen activator and not trypsin, plasmin, or 'tissue'-type plasminogen activator (HPA66). A plasminogen-activating enzyme present in monocyte cultures appeared unaffected by the presence of minactivin and could be shown to be regulated independently by dexamethasone

Evaluation of the efficacy of Alpron disinfectant for dental unit water lines

AIMS: To assess the efficacy of a disinfectant, Alpron, for controlling microbial contamination within dental unit water lines. METHODS: The microbiological quality of water emerging from the triple syringe, high speed handpiece, cup filler and surgery hand wash basin from six dental units was assessed for microbiological total viable counts at 22 degrees C and 37 degrees C before and after treatment with Alpron solutions. RESULTS: The study found that the use of Alpron disinfectant solutions could reduce microbial counts in dental unit water lines to similar levels for drinking water. This effect was maintained in all units for up to six weeks following one course of treatment. In four out of six units the low microbial counts were maintained for 13 weeks. CONCLUSIONS: Disinfectants may have a short term role to play in controlling microbial contamination of dental unit water lines to drinking water quality. However, in the longer term attention must be paid to redesigning dental units to discourage the build up of microbial biofilms

Numerical and experimental analysis of the Bell Tower of St. Jacob's Church in Kutná Hora Town

Dynamická analýza nám pomůže identifikovat parametry, které jsou potřeba pro zjištění globálního chování konstrukce. To je zvláště cenné při výpočtu historických konstrukcí, kde není možné odebrat vzorky pro destruktivní testy. Pomocí výsledků z dynamických experimentů můžeme kalibrovat FEM model a ten pak použít pro další účely. Cíle disertační práce jsou využít dynamické testování k zjištění stavu zvonové věže v kostelu sv. Jiří v Kutné Hoře. Všechny výsledky získané numerickým modelem jsou porovnány s výsledky získanými experimentálním měřením. Setování okrajových podmínek a materiálových vlastností numerického modelu bylo provedeno z vlastních frekvencí, získaných při měření. Po spočtení sil od zvonění se provedl výpočet vynuceného kmitání. Získané výsledky posunů byly v souladu s experimentem. Zároven lze říci, že zvonění nezpůsobuje žádné resonance a konstrukce je zezpečná.Dynamic analysis techniques are a way of identifying the global behaviour of a structure. It is beneficial in heritage engineering works because the testing causes no damage to the building and can indicate a lot about its current properties, as well as potential concerns for damage. Dynamic testing results can also be used to calibrate FEM models to be used as an engineering tool in design and analysis. The objectives of this paper are to use dynamic testing and analysis to determine the safety of the bell tower in the St. James Church in Kutná Hora, Czech Republic. All numerical results are compared with experimental values to verify acceptability. First, dynamic testing is completed to get experimental results of the fundamental frequencies of the tower. These are then used to develop a numerical model. The model is then used to simulate the ringing of the bell to check for signs of resonance, such as large displacements. Conclusions are made about the safety of continued bell use and the viability of the results

The response of some further education colleges to youth training under the new training initiative

Using the results of postal surveys of teachers and trainees as well as case studies the provision for the Youth Training Scheme (YTS) during 1983/4 made by a representative sample of Further Education colleges is examined. The policy intentions of governmental and quasi-government bodies are placed in their political context, focussing on the curricular policies of the Manpower Services Commission (MSC) and the Further Education Unit (FEU). The policy of the government and the MSC to change the image of youth training measures from that of a short-term social support measures (current under the Youth Opportunities Programme) to one of a permanent national training scheme is judged to have had a large measure of success. YTS in the year concerned was integrated with existing examination and apprenticeship structures. However, a streaming process according to educational level is identified, whereby lower stream trainees on college based courses receive a student-centred curriculum to a greater degree than trainees on employer based YTS courses. The influence of the FEU, struggling to preserve a liberal educational philosophy in vocational preparation, is judged to have more relevance for the (minority) lower stream courses. It is suggested that if the FEU wishes to extend its influence to the rest of YTS it will have to examine how its educational philosophy may be reconciled with the teaching style associated with traditional examination courses in FE, which have generally been adapted for YTS by teachers. The views of trainees lend justification to the MSC policy of promoting work-based learning, since trainees bring to YTS a perspective that places great value on experiences that seem like, or may lead to, real work. However, several aspects of MSC policy designed to promote work-based learning are judged to have failed, and an examination of employers' provision is recommended

The first record of a fly of the family Milichiidae (Diptera) interacting with an ant of the genus Polyrhachis Smith, 1857 (Hymenoptera: Formicidae).

Flies in the family Milichiidae are often myrmecophilic. We document the first record of a fly from this family interacting with an ant of the genus Polyrhachis. In lowland riparian rainforest in Sabah, Malaysia, we observed a female of the genus Milichia following an ant of the species of P.illaudata, and repeatedly attempting to make close contact. Our observation suggests that the dipteran may have been attempting to feed kleptoparasitically from the Polyrhachis worker, since members of this ant genus often feed on liquid carbohydrate-rich food resources. This is the first time an interaction has been observed between a fly of this family and an ant of this widespread old world tropical genus

Los beneficios de España durante la Gran Guerra. Una aproximación a la balanza de pagos española, 1914-1920

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