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https://www.readbyqxmd.com/read/28732275/plot-farm-and-watershed-scale-effects-of-coffee-cultivation-in-runoff-and-sediment-production-in-western-puerto-rico
#1
Carlos E Ramos-Scharrón, Yasiel Figueroa-Sánchez
The combination of a topographically abrupt wet-tropical setting with the high level of soil exposure that typifies many sun-grown coffee farms represents optimal conditions for high erosion rates. Although traditionally considered as a main cause for water resource degradation, limited empirical evidence has existed to document its true contribution. This study relies on plot-scale experimental results conducted in western Puerto Rico to assess the impact of cultivated surfaces and farm access roads on runoff and sediment production from the plot to the farm and watershed scales...
July 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28732272/screening-of-the-open-scaffolds-collection-from-compounds-australia-identifies-a-new-chemical-entity-with-anthelmintic-activities-against-different-developmental-stages-of-the-barber-s-pole-worm-and-other-parasitic-nematodes
#2
Sarah Preston, Yaqing Jiao, Jonathan B Baell, Jennifer Keiser, Simon Crawford, Anson V Koehler, Tao Wang, Moana M Simpson, Ray M Kaplan, Karla J Cowley, Kaylene J Simpson, Andreas Hofmann, Abdul Jabbar, Robin B Gasser
The discovery and development of novel anthelmintic classes is essential to sustain the control of socioeconomically important parasitic worms of humans and animals. With the aim of offering novel, lead-like scaffolds for drug discovery, Compounds Australia released the 'Open Scaffolds' collection containing 33,999 compounds, with extensive information available on the physicochemical properties of these chemicals. In the present study, we screened 14,464 prioritised compounds from the 'Open Scaffolds' collection against the exsheathed third-stage larvae (xL3s) of Haemonchus contortus using recently developed whole-organism screening assays...
May 28, 2017: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28732051/cd4-is-expressed-on-a-heterogeneous-subset-of-hematopoietic-progenitors-which-persistently-harbor-cxcr4-and-ccr5-tropic-hiv-proviral-genomes-in-vivo
#3
Nadia T Sebastian, Thomas D Zaikos, Valeri Terry, Frances Taschuk, Lucy A McNamara, Adewunmi Onafuwa-Nuga, Ryan Yucha, Robert A J Signer, James Riddell, Dale Bixby, Norman Markowitz, Sean J Morrison, Kathleen L Collins
Latent HIV infection of long-lived cells is a barrier to viral clearance. Hematopoietic stem and progenitor cells are a heterogeneous population of cells, some of which are long-lived. CXCR4-tropic HIVs infect a broad range of HSPC subtypes, including hematopoietic stem cells, which are multi-potent and long-lived. However, CCR5-tropic HIV infection is limited to more differentiated progenitor cells with life spans that are less well understood. Consistent with emerging data that restricted progenitor cells can be long-lived, we detected persistent HIV in restricted HSPC populations from optimally treated people...
July 21, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28732022/global-economic-trade-offs-between-wild-nature-and-tropical-agriculture
#4
Luis R Carrasco, Edward L Webb, William S Symes, Lian P Koh, Navjot S Sodhi
Global demands for agricultural and forestry products provide economic incentives for deforestation across the tropics. Much of this deforestation occurs with a lack of information on the spatial distribution of benefits and costs of deforestation. To inform global sustainable land-use policies, we combine geographic information systems (GIS) with a meta-analysis of ecosystem services (ES) studies to perform a spatially explicit analysis of the trade-offs between agricultural benefits, carbon emissions, and losses of multiple ecosystem services because of tropical deforestation from 2000 to 2012...
July 2017: PLoS Biology
https://www.readbyqxmd.com/read/28732017/disease-severity-in-patients-with-visceral-leishmaniasis-is-not-altered-by-co-infection-with-intestinal-parasites
#5
Fitsumbrhan Tajebe, Mulusew Getahun, Emebet Adem, Asrat Hailu, Mulualem Lemma, Helina Fikre, John Raynes, Aschalew Tamiru, Zemenay Mulugeta, Ermias Diro, Frederic Toulza, Ziv Shkedy, Tadesse Ayele, Manuel Modolell, Markus Munder, Ingrid Müller, Yegnasew Takele, Pascale Kropf
Visceral leishmaniasis (VL) is a neglected tropical disease that affects the poorest communities and can cause substantial morbidity and mortality. Visceral leishmaniasis is characterized by the presence of Leishmania parasites in the spleen, liver and bone marrow, hepatosplenomegaly, pancytopenia, prolonged fever, systemic inflammation and low body mass index (BMI). The factors impacting on the severity of VL are poorly characterized. Here we performed a cross-sectional study to assess whether co-infection of VL patients with intestinal parasites influences disease severity, assessed with clinical and haematological data, inflammation, cytokine profiles and BMI...
July 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28731828/geographical-variation-in-community-divergence-insights-from-tropical-forest-monodominance-by-ectomycorrhizal-trees
#6
Tadashi Fukami, Mifuyu Nakajima, Claire Fortunel, Paul V A Fine, Christopher Baraloto, Sabrina E Russo, Kabir G Peay
Convergence occurs in both species traits and community structure, but how convergence at the two scales influences each other remains unclear. To address this question, we focus on tropical forest monodominance, in which a single, often ectomycorrhizal (EM) tree species occasionally dominates forest stands within a landscape otherwise characterized by diverse communities of arbuscular mycorrhizal (AM) trees. Such monodominance is a striking potential example of community divergence resulting in alternative stable states...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28731827/convergence-consilience-and-the-evolution-of-temperate-deciduous-forests
#7
Erika J Edwards, David S Chatelet, Bo-Chang Chen, Jin Yao Ong, Shuichiro Tagane, Hironobu Kanemitsu, Kazuki Tagawa, Kentaro Teramoto, Brian Park, Kuo-Fang Chung, Jer-Ming Hu, Tetsukazu Yahara, Michael J Donoghue
The deciduous habit of northern temperate trees and shrubs provides one of the most obvious examples of convergent evolution, but how did it evolve? Hypotheses based on the fossil record posit that deciduousness evolved first in response to drought or darkness and preadapted certain lineages as cold climates spread. An alternative is that evergreens first established in freezing environments and later evolved the deciduous habit. We monitored phenological patterns of 20 species of Viburnum spanning tropical, lucidophyllous (subtropical montane and warm temperate), and cool temperate Asian forests...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28731793/phylogeny-traits-and-biodiversity-of-a-neotropical-bat-assemblage-close-relatives-show-similar-responses-to-local-deforestation
#8
Hannah K Frank, Luke O Frishkoff, Chase D Mendenhall, Gretchen C Daily, Elizabeth A Hadly
If species' evolutionary pasts predetermine their responses to evolutionarily novel stressors, then phylogeny could predict species survival in an increasingly human-dominated world. To understand the role of phylogenetic relatedness in structuring responses to rapid environmental change, we focused on assemblages of Neotropical bats, an ecologically diverse and functionally important group. We examined how taxonomic and phylogenetic diversity shift between tropical forest and farmland. We then explored the importance of evolutionary history by ascertaining whether close relatives share similar responses to environmental change and which species traits might mediate these trends...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28730958/engineering-synergistically-active-and-bioavailable-cost-effective-medicines-for-neglected-tropical-diseases-the-role-of-excipients
#9
Dolores R Serrano, Aikaterini Lalatsa, M Auxiliadora Dea-Ayuela
Leishmaniasis is a neglected tropical disease responsible for the ninth largest disease burden in the world threatening 350 million people mostly in developing countries. The lack of efficacy, severe adverse effects, long duration, high cost and parenteral administration of the current therapies result in poor patient compliance and emergence of resistance. Leishmaniasis' unmet need for safer, affordable and more effective treatments is only partly addressed by today's global health product pipeline that focuses on products amenable to rapid clinical development, mainly by reformulating or repurposing existing drugs for new uses...
July 19, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28730326/infectious-diseases-causing-autonomic-dysfunction
#10
REVIEW
Francisco Javier Carod Artal
OBJECTIVES: To review infectious diseases that may cause autonomic dysfunction. METHODS: Review of published papers indexed in medline/embase. RESULTS: Autonomic dysfunction has been reported in retrovirus (human immunodeficiency virus (HIV), human T-lymphotropic virus), herpes viruses, flavivirus, enterovirus 71 and lyssavirus infections. Autonomic dysfunction is relatively common in HIV-infected patients and heart rate variability is reduced even in early stages of infection...
July 20, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28729854/microbiome-of-trichodesmium-colonies-from-the-north-pacific-subtropical-gyre
#11
Mary R Gradoville, Byron C Crump, Ricardo M Letelier, Matthew J Church, Angelicque E White
Filamentous diazotrophic Cyanobacteria of the genus Trichodesmium, often found in colonial form, provide an important source of new nitrogen to tropical and subtropical marine ecosystems. Colonies are composed of several clades of Trichodesmium in association with a diverse community of bacterial and eukaryotic epibionts. We used high-throughput 16S rRNA and nifH gene sequencing, carbon (C) and dinitrogen (N2) fixation assays, and metagenomics to describe the diversity and functional potential of the microbiome associated with Trichodesmium colonies collected from the North Pacific Subtropical Gyre (NPSG)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28729714/maize-zea-mays-l-genome-size-indicated-by-180-bp-knob-abundance-is-associated-with-flowering-time
#12
Yinqiao Jian, Cheng Xu, Zifeng Guo, Shanhong Wang, Yunbi Xu, Cheng Zou
Flowering time is considered one of the most important agronomic traits in maize (Zea mays L.), and previous studies have indicated that this trait is correlated with genome size. We observed a significant difference in genome size between tropical and temperate inbred lines and a moderate positive correlation between genome size and 180-bp knob abundance determined by high-throughput sequencing in maize inbred lines in this study. We assembled the reads that were mapped to 180-bp knob sequences and found that the top ten abundant 180-bp knob sequences are highly variable...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729670/forest-edge-disturbance-increases-rattan-abundance-in-tropical-rain-forest-fragments
#13
Mason J Campbell, Will Edwards, Ainhoa Magrach, Susan G Laurance, Mohammed Alamgir, Gabriel Porolak, William F Laurance
Human-induced forest fragmentation poses one of the largest threats to global diversity yet its impact on rattans (climbing palms) has remained virtually unexplored. Rattan is arguably the world's most valuable non-timber forest product though current levels of harvesting and land-use change place wild populations at risk. To assess rattan response to fragmentation exclusive of harvesting impacts we examined rattan abundance, demography and ecology within the forests of northeastern, Australia. We assessed the community abundance of rattans, and component adult (>3 m) and juvenile (≤3 m) abundance in five intact forests and five fragments (23-58 ha) to determine their response to a range of environmental and ecological parameters...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729633/threats-to-large-brown-algal-forests-in-temperate-seas-the-overlooked-role-of-native-herbivorous-fish
#14
Fabrizio Gianni, Fabrizio Bartolini, Alexis Pey, Mathieu Laurent, Gustavo M Martins, Laura Airoldi, Luisa Mangialajo
Canopy-forming algae are declining globally due to multiple disturbances. This decline has recently been on the increase due to the spread of some tropical herbivorous fishes. This new phenomenon has drawn attention to the effects of fish herbivory in temperate areas, which have been assumed to be negligible compared to that of invertebrates, such as sea urchins. In this study, the impact of a Mediterranean native herbivorous fish (Sarpa salpa, salema) was assessed on the canopy-forming seaweed Cystoseira amentacea var...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729611/cryptic-speciation-in-pan-tropical-sea-urchins-a-case-study-of-an-edge-of-range-population-of-tripneustes-from-the-kermadec-islands
#15
Omri Bronstein, Andreas Kroh, Barbara Tautscher, Libby Liggins, Elisabeth Haring
Tripneustes is one of the most abundant and ecologically significant tropical echinoids. Highly valued for its gonads, wild populations of Tripneustes are commercially exploited and cultivated stocks are a prime target for the fisheries and aquaculture industry. Here we examine Tripneustes from the Kermadec Islands, a remote chain of volcanic islands in the southwest Pacific Ocean that mark the boundary of the genus' range, by combining morphological and genetic analyses, using two mitochondrial (COI and the Control Region), and one nuclear (bindin) marker...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729610/mean-bias-in-seasonal-forecast-model-and-enso-prediction-error
#16
Seon Tae Kim, Hye-In Jeong, Fei-Fei Jin
This study uses retrospective forecasts made using an APEC Climate Center seasonal forecast model to investigate the cause of errors in predicting the amplitude of El Niño Southern Oscillation (ENSO)-driven sea surface temperature variability. When utilizing Bjerknes coupled stability (BJ) index analysis, enhanced errors in ENSO amplitude with forecast lead times are found to be well represented by those in the growth rate estimated by the BJ index. ENSO amplitude forecast errors are most strongly associated with the errors in both the thermocline slope response and surface wind response to forcing over the tropical Pacific, leading to errors in thermocline feedback...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28728879/identification-of-universal-diagnostic-peptide-candidates-for-neglected-tropical-diseases-caused-by-cestodes-through-the-integration-of-multi-genome-wide-analyses-and-immunoinformatic-predictions
#17
Sebastián Miles, Marco Navatta, Sylvia Dematteis, Gustavo Mourglia-Ettlin
Neglected tropical diseases caused by helminth infections currently affect millions of people worldwide. Among them, there are three tapeworm species of outstanding importance: Echinococcus granulosus, E. multilocularis, and Taenia solium, which are responsible for cystic echinococcosis, alveolar echinococcosis, and cysticercosis, respectively. Despite several attempts, there is still a need for an effective and low-cost serological diagnostic test that can be used in endemic countries. In the present work, we described an innovative bioinformatic workflow for a rational prediction of putative peptide candidates for one-step serological diagnosis of any of these infections...
July 17, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28728595/malaria-after-international-travel-a-geosentinel-analysis-2003-2016
#18
Kristina M Angelo, Michael Libman, Eric Caumes, Davidson H Hamer, Kevin C Kain, Karin Leder, Martin P Grobusch, Stefan H Hagmann, Phyllis Kozarsky, David G Lalloo, Poh-Lian Lim, Calvin Patimeteeporn, Philippe Gautret, Silvia Odolini, François Chappuis, Douglas H Esposito
BACKGROUND: More than 30,000 malaria cases are reported annually among international travellers. Despite improvements in malaria control, malaria continues to threaten travellers due to inaccurate perception of risk and sub-optimal pre-travel preparation. METHODS: Records with a confirmed malaria diagnosis after travel from January 2003 to July 2016 were obtained from GeoSentinel, a global surveillance network of travel and tropical medicine providers that monitors travel-related morbidity...
July 20, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28728403/newborn-traits-associated-with-pre-weaning-growth-and-survival-in-piglets
#19
Morakot Nuntapaitoon, Ramon Muns, Padet Tummaruk
Objective: Piglet pre-weaning mortality is an important variable indicating the efficacy of farrowing management and animal well-being during lactation. The present study determined the association of newborn traits measured soon after birth with piglet pre-weaning mortality and growth. Methods: In total, 805 piglets born from 57 multiparous sows were investigated. Their blood oxygen saturation, blood glucose and rectal temperature at 24 h after birth (RT24h) were monitored...
July 17, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28728358/tropical-plant-supplementation-effects-on-the-performance-and-parasite-burden-of-goats
#20
Juan Jose Romero, Miguel Augusto Zarate, Ibukun M Ogunade, Kathy G Arriola, Adegbola Tolulope Adesogan
Objective: Examine the effects of supplementing bahiagrass hay (BG) with potentially anthelmintic quantities of hays of perennial peanut (PEA) or sericea lespedeza (LES) or seeds of velvet bean (MUC) or papaya (PAP) on the intake and nutritive value (Experiment 1), and the performance and parasite burden (Experiment 2) of goats. Methods: In experiment 1, 38 male goats (27.4 ± 5.7 kg BW) were randomly assigned to each of 5 treatments: 1) BG alone and BG plus 2) PEA; 3) LES; 4) MUC; and 5) PAP...
June 27, 2017: Asian-Australasian Journal of Animal Sciences
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