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Ecology

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https://www.readbyqxmd.com/read/29141015/nematocytes-discovery-and-characterization-of-a-novel-anculeate-hemocyte-in-drosophila-falleni-and-drosophila-phalerata
#1
Julianna Bozler, Balint Z Kacsoh, Giovanni Bosco
Immune challenges, such as parasitism, can be so pervasive and deleterious that they constitute an existential threat to a species' survival. In response to these ecological pressures, organisms have developed a wide array of novel behavioral, cellular, and molecular adaptations. Research into these immune defenses in model systems has resulted in a revolutionary understanding of evolution and functional biology. As the field has expanded beyond the limited number of model organisms our appreciation of evolutionary innovation and unique biology has widened as well...
2017: PloS One
https://www.readbyqxmd.com/read/29140995/process-strengths-determine-the-forms-of-the-relationship-between-plant-species-richness-and-primary-productivity
#2
Zhenhong Wang
The current rates of biodiversity loss have exceeded the rates observed during the earth's major extinction events, which spurs the studies of the ecological relationships between biodiversity and ecosystem functions, stability, and services to determine the consequences of biodiversity loss. Plant species richness-productivity relationship (SRPR) is crucial to the understanding of these relationships in plants. Most ecologists have reached a widespread consensus that the loss of plant diversity undoubtedly impairs ecosystem functions, and have proposed many processes to explain the SRPR...
2017: PloS One
https://www.readbyqxmd.com/read/29140991/a-bayesian-method-for-detecting-pairwise-associations-in-compositional-data
#3
Emma Schwager, Himel Mallick, Steffen Ventz, Curtis Huttenhower
Compositional data consist of vectors of proportions normalized to a constant sum from a basis of unobserved counts. The sum constraint makes inference on correlations between unconstrained features challenging due to the information loss from normalization. However, such correlations are of long-standing interest in fields including ecology. We propose a novel Bayesian framework (BAnOCC: Bayesian Analysis of Compositional Covariance) to estimate a sparse precision matrix through a LASSO prior. The resulting posterior, generated by MCMC sampling, allows uncertainty quantification of any function of the precision matrix, including the correlation matrix...
November 15, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/29140977/low-cost-and-open-source-multi-fluorescence-imaging-system-for-teaching-and-research-in-biology-and-bioengineering
#4
Isaac Nuñez, Tamara Matute, Roberto Herrera, Juan Keymer, Timothy Marzullo, Timothy Rudge, Fernán Federici
The advent of easy-to-use open source microcontrollers, off-the-shelf electronics and customizable manufacturing technologies has facilitated the development of inexpensive scientific devices and laboratory equipment. In this study, we describe an imaging system that integrates low-cost and open-source hardware, software and genetic resources. The multi-fluorescence imaging system consists of readily available 470 nm LEDs, a Raspberry Pi camera and a set of filters made with low cost acrylics. This device allows imaging in scales ranging from single colonies to entire plates...
2017: PloS One
https://www.readbyqxmd.com/read/29140754/comparing-diversity-of-fungi-from-living-leaves-using-culturing-and-high-throughput-environmental-sequencing
#5
Peter R Johnston, Duckchul Park, Rob D Smissen
High-throughput sequencing technologies using amplicon approaches have changed the way that studies investigating fungal distribution are undertaken. These powerful and time-efficient technologies have the potential for the first time to accurately map fungal distributions across landscapes or changes in diversity across ecological or biological gradients of interest. There is no requirement for a fungus to form a fruiting body to be detected, and both culturable and nonculturable organisms can be detected...
October 6, 2017: Mycologia
https://www.readbyqxmd.com/read/29140522/ecodrug-a-database-connecting-drugs-and-conservation-of-their-targets-across-species
#6
Bas Verbruggen, Lina Gunnarsson, Erik Kristiansson, Tobias Österlund, Stewart F Owen, Jason R Snape, Charles R Tyler
Pharmaceuticals are designed to interact with specific molecular targets in humans and these targets generally have orthologs in other species. This provides opportunities for the drug discovery community to use alternative model species for drug development. It also means, however, there is potential for mode of action related effects in non-target wildlife species as many pharmaceuticals reach the environment through patient use and manufacturing wastes. Acquiring insight in drug target ortholog predictions across species and taxonomic groups has proven difficult because of the lack of an optimal strategy and because necessary information is spread across multiple and diverse sources and platforms...
November 11, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29140260/vaccinia-virus-natural-infections-in-brazil-the-good-the-bad-and-the-ugly
#7
REVIEW
Jaqueline Silva de Oliveira, Poliana de Oliveira Figueiredo, Galileu Barbosa Costa, Felipe Lopes de Assis, Betânia Paiva Drumond, Flávio Guimarães da Fonseca, Maurício Lacerda Nogueira, Erna Geessien Kroon, Giliane de Souza Trindade
The orthopoxviruses (OPV) comprise several emerging viruses with great importance to human and veterinary medicine, including vaccinia virus (VACV), which causes outbreaks of bovine vaccinia (BV) in South America. Historically, VACV is the most comprehensively studied virus, however, its origin and natural hosts remain unknown. VACV was the primary component of the smallpox vaccine, largely used during the smallpox eradication campaign. After smallpox was declared eradicated, the vaccination that conferred immunity to OPV was discontinued, favoring a new contingent of susceptible individuals to OPV...
November 15, 2017: Viruses
https://www.readbyqxmd.com/read/29140234/prevalence-of-trypanosoma-cruzi-and-other-trypanosomatids-in-frequently-hunted-wild-mammals-from-the-peruvian-amazon
#8
E Angelo Morales, Pedro Mayor, Mark Bowler, Esar Aysanoa, Erika S Pérez-Velez, Jocelyn Pérez, Julio A Ventocilla, G Christian Baldeviano, Andrés G Lescano
To better understand the ecology of Trypanosoma cruzi in the northeastern Peruvian Amazon, we evaluated the prevalence of T. cruzi and other trypanosomatids in four orders of wild mammals hunted and consumed by inhabitants of three remote indigenous communities in the Peruvian Amazon. Of 300 wild mammals sampled, 115 (38.3%) were infected with trypanosomatids and 15 (5.0%) with T. cruzi. The prevalence of T. cruzi within each species was as follows: large rodents (Cuniculus paca, 5.5%; Dasyprocta spp., 2.6%), edentates (Dasypus novemcinctus, 4...
November 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29139572/exposing-ecological-and-economic-costs-of-the-research-implementation-gap-and-compromises-in-decision-making
#9
Santtu Kareksela, Atte Moilanen, Olli Ristaniemi, Reima Välivaara, Janne S Kotiaho
The frequently discussed gap between conservation science and practice is manifest in the gap between spatial conservation prioritization plans and their implementation. We analyzed the research-implementation gap of 1 zoning case by comparing results of a spatial prioritization analysis aimed at avoiding ecological impact of peat mining in a regional zoning process with the final zoning plan. We examined the relatively complex planning process to determine the gaps among research, zoning, and decision making...
November 15, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/29139216/patterns-and-drivers-of-fish-extirpations-in-rivers-of-the-american-southwest-and-southeast
#10
John S Kominoski, Albert Ruhí, Megan M Hagler, Kelly Petersen, John L Sabo, Tushar Sinha, Arumugam Sankarasubramanian, Julian D Olden
Effective conservation of freshwater biodiversity requires spatially explicit investigations of how dams and hydroclimatic alterations among climate regions may interact to drive species to extinction. We investigated how dams and hydroclimatic alterations interact with species ecological and life history traits to influence past extirpation probabilities of native freshwater fishes in the Upper and Lower Colorado River (CR), Alabama-Coosa-Tallapoosa (ACT), and Apalachicola-Chattahoochee-Flint (ACF) basins...
November 15, 2017: Global Change Biology
https://www.readbyqxmd.com/read/29138910/metabolic-synergies-in-the-biotransformation-of-organic-and-metallic-toxic-compounds-by-a-saprotrophic-soil-fungus
#11
Andrea Ceci, Flavia Pinzari, Carmela Riccardi, Oriana Maggi, Lucia Pierro, Marco Petrangeli Papini, Geoffrey Michael Gadd, Anna Maria Persiani
The saprotrophic fungus Penicillium griseofulvum was chosen as model organism to study responses to a mixture of hexachlorocyclohexane (HCH) isomers (α-HCH, β-HCH, γ-HCH, δ-HCH) and potentially toxic metals (vanadium, lead) in solid and liquid media. The P. griseofulvum FBL 500 strain was isolated from polluted soil containing high concentrations of HCH isomers and potentially toxic elements (Pb, V). Experiments were performed in order to analyse the tolerance/resistance of this fungus to xenobiotics and to shed further light on fungal potential in inorganic and organic biotransformations...
November 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29138307/microdiversity-of-an-abundant-terrestrial-bacterium-encompasses-extensive-variation-in-ecologically-relevant-traits
#12
Alexander B Chase, Ulas Karaoz, Eoin L Brodie, Zulema Gomez-Lunar, Adam C Martiny, Jennifer B H Martiny
Much genetic diversity within a bacterial community is likely obscured by microdiversity within operational taxonomic units (OTUs) defined by 16S rRNA gene sequences. However, it is unclear how variation within this microdiversity influences ecologically relevant traits. Here, we employ a multifaceted approach to investigate microdiversity within the dominant leaf litter bacterium, Curtobacterium, which comprises 7.8% of the bacterial community at a grassland site undergoing global change manipulations. We use cultured bacterial isolates to interpret metagenomic data, collected in situ over 2 years, together with lab-based physiological assays to determine the extent of trait variation within this abundant OTU...
November 14, 2017: MBio
https://www.readbyqxmd.com/read/29137971/clearance-of-schistosome-parasites-by-resistant-genotypes-at-a-single-genomic-region-in-biomphalaria-glabrata-snails-involves-cellular-components-of-the-hemolymph
#13
Euan R O Allan, Benjamin Gourbal, Camila B Dores, Anais Portet, Christopher J Bayne, Michael S Blouin
Schistosomiasis is one of the most detrimental neglected tropical diseases. Controlling the spread of this parasitic illness requires effective sanitation, access to chemotherapeutic drugs, and control over populations of the freshwater snails, such as Biomphalaria glabrata, that are essential intermediate hosts for schistosomes. Effectively controlling this disease, while minimizing ecological implications of such control, will require an extensive understanding of the immunological interactions between schistosomes and their molluscan intermediate hosts...
November 11, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/29137841/using-ecological-momentary-assessment-to-assess-the-temporal-relationship-between-sleep-quality-and-cravings-in-individuals-recovering-from-substance-use-disorders
#14
Lindsey K Freeman, Nisha C Gottfredson
INTRODUCTION: The causal direction of the relationship between sleep disturbance and drug cravings is unknown. Based on resource depletion literature, we hypothesized that sleep difficulties lead to cravings. We tested whether sleep quality predicts craving at the within- or between-person level, with perceived willpower as a multilevel mediator. METHODS: We used ecological momentary assessments (EMA) to compare two models of temporal precedence. Participants in addiction treatment (N=122) were sent four surveys each day for three weeks...
November 11, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/29137813/reasons-for-seagrass-optimism-local-ecological-knowledge-confirms-presence-of-dugongs
#15
Leanne C Cullen-Unsworth, Benjamin L Jones, Rachel Seary, Rhian Newman, Richard K F Unsworth
Dugongs (Dugong dugon) depend on seagrass meadows for food. As such seagrass and dugong conservation should go hand in hand. Assessing dugong populations is notoriously challenging. In the most resource dependent communities Local Ecological Knowledge (LEK) is generally high and can provide an alternative to the use of expensive ecological surveys to understand dugong populations and support associated resource management decisions. Residents of the Wakatobi National Park (WNP), SE Sulawesi, Indonesia are highly dependent on marine resources for livelihoods and correspondingly LEK is high...
November 11, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29137812/crowdsourcing-conservation-the-role-of-citizen-science-in-securing-a-future-for-seagrass
#16
Benjamin L Jones, Richard K F Unsworth, Len J McKenzie, Rudi L Yoshida, Leanne C Cullen-Unsworth
Seagrass meadows are complex social-ecological systems. Understanding seagrass meadows demands a fresh approach integrating "the human dimension". Citizen science is widely acknowledged for providing significant contributions to science, education, society and policy. Although the take up of citizen science in the marine environment has been slow, the need for such methods to fill vast information gaps is arguably great. Seagrass meadows are easy to access and provide an example of where citizen science is expanding...
November 11, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29137670/modelling-and-mapping-tick-dynamics-using-volunteered-observations
#17
Irene Garcia-Martí, Raúl Zurita-Milla, Arnold J H van Vliet, Willem Takken
BACKGROUND: Tick populations and tick-borne infections have steadily increased since the mid-1990s posing an ever-increasing risk to public health. Yet, modelling tick dynamics remains challenging because of the lack of data and knowledge on this complex phenomenon. Here we present an approach to model and map tick dynamics using volunteered data. This approach is illustrated with 9 years of data collected by a group of trained volunteers who sampled active questing ticks (AQT) on a monthly basis and for 15 locations in the Netherlands...
November 14, 2017: International Journal of Health Geographics
https://www.readbyqxmd.com/read/29137171/regulation-of-the-rhythmic-emission-of-plant-volatiles-by-the-circadian-clock
#18
REVIEW
Lanting Zeng, Xiaoqin Wang, Ming Kang, Fang Dong, Ziyin Yang
Like other organisms, plants have endogenous biological clocks that enable them to organize their metabolic, physiological, and developmental processes. The representative biological clock is the circadian system that regulates daily (24-h) rhythms. Circadian-regulated changes in growth have been observed in numerous plants. Evidence from many recent studies indicates that the circadian clock regulates a multitude of factors that affect plant metabolites, especially emitted volatiles that have important ecological functions...
November 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29136841/miniaturized-quechers-based-methodology-for-multiresidue-determination-of-pesticides-in-odonate-nymphs-as-ecosystem-biomonitors
#19
Florencia Jesús, Ricardo Hladki, Natalia Gérez, Natalia Besil, Silvina Niell, Grisel Fernández, Horacio Heinzen, María Verónica Cesio
The impacts of the modern, agrochemicals based agriculture that threatens the overall systems sustainability, need to be monitored and evaluated. Seeking for agroecosystems monitors, the present article focus in the occurrence and abundance of aquatic macroinvertebrates, that have been frequently used as bioindicators of water quality due to their relationship with land use. Some of these organisms are on the top of the food chain, where bioaccumulation and biomagnification processes can be observed, and they can turn into secondary pollution sources of systems and terrestrial organisms as well...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136658/community-ecology-in-3d-tensor-decomposition-reveals-spatio-temporal-dynamics-of-large-ecological-communities
#20
Romain Frelat, Martin Lindegren, Tim Spaanheden Denker, Jens Floeter, Heino O Fock, Camilla Sguotti, Moritz Stäbler, Saskia A Otto, Christian Möllmann
Understanding spatio-temporal dynamics of biotic communities containing large numbers of species is crucial to guide ecosystem management and conservation efforts. However, traditional approaches usually focus on studying community dynamics either in space or in time, often failing to fully account for interlinked spatio-temporal changes. In this study, we demonstrate and promote the use of tensor decomposition for disentangling spatio-temporal community dynamics in long-term monitoring data. Tensor decomposition builds on traditional multivariate statistics (e...
2017: PloS One
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