Maxent estimation of aquatic Escherichia coli stream impairment.

Abstract:

Background:The leading cause of surface water impairment in United States' rivers and streams is pathogen contamination. Although use of fecal indicators has reduced human health risk, current approaches to identify and reduce exposure can be improved. One important knowledge gap within exposure assessment is characterization of complex fate and transport processes of fecal pollution. Novel modeling processes can inform watershed decision-making to improve exposure assessment. Methods:We used the ecological model, Maxent, and the fecal indicator bacterium Escherichia coli to identify environmental factors associated with surface water impairment. Samples were collected August, November, February, and May for 8 years on Sinking Creek in Northeast Tennessee and analyzed for 10 water quality parameters and E. coli concentrations. Univariate and multivariate models estimated probability of impairment given the water quality parameters. Model performance was assessed using area under the receiving operating characteristic (AUC) and prediction accuracy, defined as the model's ability to predict both true positives (impairment) and true negatives (compliance). Univariate models generated action values, or environmental thresholds, to indicate potential E. coli impairment based on a single parameter. Multivariate models predicted probability of impairment given a suite of environmental variables, and jack-knife sensitivity analysis removed unresponsive variables to elicit a set of the most responsive parameters. Results:Water temperature univariate models performed best as indicated by AUC, but alkalinity models were the most accurate at correctly classifying impairment. Sensitivity analysis revealed that models were most sensitive to removal of specific conductance. Other sensitive variables included water temperature, dissolved oxygen, discharge, and NO3. The removal of dissolved oxygen improved model performance based on testing AUC, justifying development of two optimized multivariate models; a 5-variable model including all sensitive parameters, and a 4-variable model that excluded dissolved oxygen. Discussion:Results suggest that E. coli impairment in Sinking Creek is influenced by seasonality and agricultural run-off, stressing the need for multi-month sampling along a stream continuum. Although discharge was not predictive of E. coli impairment alone, its interactive effect stresses the importance of both flow dependent and independent processes associated with E. coli impairment. This research also highlights the interactions between nutrient and fecal pollution, a key consideration for watersheds with multiple synergistic impairments. Although one indicator cannot mimic theplethora of existing pathogens in water, incorporating modeling can fine tune an indicator's utility, providing information concerning fate, transport, and source of fecal pollution while prioritizing resources and increasing confidence in decision making.

journal_name

PeerJ

journal_title

PeerJ

authors

Gilfillan D,Joyner TA,Scheuerman P

doi

10.7717/peerj.5610

subject

Has Abstract

pub_date

2018-09-13 00:00:00

pages

e5610

issn

2167-8359

pii

5610

journal_volume

6

pub_type

杂志文章

相关文献

PeerJ文献大全
  • The first tetrapod from the mid-Miocene Clarkia lagerstätte (Idaho, USA).

    abstract::The Clarkia lagerstätte (Latah Formation) of Idaho is well known for its beautifully preserved plant fossils as well as a fauna of insects and fish. Here we present the first known tetrapod fossil from these deposits. This specimen, recovered from the lower anoxic zone of the beds, is preserved as a carbonaceous film ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.4880

    authors: Calede JJM,Orcutt JD,Kehl WA,Richards BD

    更新日期:2018-06-08 00:00:00

  • Differences in the support needs of children with developmental disabilities among groups of medical and behavioral needs.

    abstract:Background/Aims:Medical and behavioral needs are relevant in organizing and providing support strategies that improve the quality of life for children, along with their families. The present study aims to examine the impact of medical and behavioral needs on the need for support of children with disabilities. Methods:...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.9557

    authors: Arias VB,Aguayo V,Verdugo MA,Amor AM

    更新日期:2020-09-15 00:00:00

  • Honey bee viruses in Serbian colonies of different strength.

    abstract::Protection of honey bees is of great economic importance because of their role in pollination. Crucial steps towards this goal are epidemiological surveys of pathogens connected with honey bee losses. In this study deformed wing virus (DWV), chronic bee paralysis virus (CBPV), acute bee paralysis virus (ABPV) and sacb...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.5887

    authors: Cirkovic D,Stevanovic J,Glavinic U,Aleksic N,Djuric S,Aleksic J,Stanimirovic Z

    更新日期:2018-11-14 00:00:00

  • Use of the traditional halibut hook of the Makah Tribe, the čibu.d, reduces bycatch in recreational halibut fisheries.

    abstract::A previous study found that use of the traditional halibut hook (čibu.d) of the Makah Tribe in present day recreational Pacific halibut (Hippoglossus stenolepis) fisheries significantly reduced bycatch compared to paired 8/0 circle hooks. The study also found that the čibu.d had a significantly reduced catch of halibu...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.9288

    authors: Petersen JR,Scordino JJ,Svec CI,Buttram RH,Gonzalez MR,Scordino J

    更新日期:2020-06-12 00:00:00

  • Conceptual and empirical advances in Neotropical biodiversity research.

    abstract::The unparalleled biodiversity found in the American tropics (the Neotropics) has attracted the attention of naturalists for centuries. Despite major advances in recent years in our understanding of the origin and diversification of many Neotropical taxa and biotic regions, many questions remain to be answered. Additio...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.5644

    authors: Antonelli A,Ariza M,Albert J,Andermann T,Azevedo J,Bacon C,Faurby S,Guedes T,Hoorn C,Lohmann LG,Matos-Maraví P,Ritter CD,Sanmartín I,Silvestro D,Tejedor M,Ter Steege H,Tuomisto H,Werneck FP,Zizka A,Edwards SV

    更新日期:2018-10-04 00:00:00

  • The complete genome of Banana streak GF virus Yunnan isolate infecting Cavendish Musa AAA group in China.

    abstract::Banana streak virus (BSV) belongs to the members of the genus Badnavirus, family Caulimoviridae. At present, BSV contains nine species in the International Committee on Taxonomy of Viruses (ICTV) classification report (2018b release). Previous study indicated that the viral particles of Banana streak virus Acuminata Y...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.8459

    authors: Li WL,Yu NT,Wang JH,Li JC,Liu ZX

    更新日期:2020-01-27 00:00:00

  • Effects of agricultural management on phyllosphere fungal diversity in vineyards and the association with adjacent native forests.

    abstract::Agriculture is one of the main drivers of land conversion, and agriculture practices can impact on microbial diversity. Here we characterized the phyllosphere fungal diversity associated with Carménère grapevines under conventional and organic agricultural management. We also explored the fungal diversity present in t...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.5715

    authors: Castañeda LE,Miura T,Sánchez R,Barbosa O

    更新日期:2018-10-29 00:00:00

  • Host plant affects morphometric variation of Diaphorina citri (Hemiptera: Liviidae).

    abstract::The Asian citrus psyllid (ACP), Diaphorina citri Kuwayama, is one of the most serious citrus pests worldwide due to its role as vector of huanglongbing or citrus greening disease. While some optimal plant species for ACP oviposition and development have been identified, little is known of the influence of host plants ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.2663

    authors: Paris TM,Allan SA,Hall DG,Hentz MG,Hetesy G,Stansly PA

    更新日期:2016-11-03 00:00:00

  • Association analysis between chronic obstructive pulmonary disease and polymorphisms in circadian genes.

    abstract:Background:Circadian genes have been suggested to play an important role in lung pathology. However, it remains unknown whether polymorphisms of these genes are associated with chronic obstructive pulmonary disease (COPD). Here, we aimed to investigate the association of circadian genes polymorphisms with COPD in a cas...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.9806

    authors: Chen G,Zhang J,Zhang L,Xiong X,Yu D,Zhang Y

    更新日期:2020-08-27 00:00:00

  • Widespread dieback of riparian trees on a dammed ephemeral river and evidence of local mitigation by tributary flows.

    abstract::Ephemeral rivers act as linear oases in drylands providing key resources to people and wildlife. However, not much is known about these rivers' sensitivities to human activities. We investigated the landscape-level determinants of riparian tree dieback along the Swakop River, a dammed ephemeral river in Namibia, focus...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.2622

    authors: Douglas CM,Mulligan M,Harrison XA,Henschel JR,Pettorelli N,Cowlishaw G

    更新日期:2016-10-27 00:00:00

  • Mechanistic pathways of mercury removal from the organomercurial lyase active site.

    abstract::Bacterial populations present in Hg-rich environments have evolved biological mechanisms to detoxify methylmercury and other organometallic mercury compounds. The most common resistance mechanism relies on the H(+)-assisted cleavage of the Hg-C bond of methylmercury by the organomercurial lyase MerB. Although the init...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.1127

    authors: Silva PJ,Rodrigues V

    更新日期:2015-07-28 00:00:00

  • Characterization of four new monoclonal antibodies against the distal N-terminal region of PrP(c).

    abstract::Prion diseases are a group of fatal neurodegenerative disorders that affect humans and animals. They are characterized by the accumulation in the central nervous system of a pathological form of the host-encoded prion protein (PrP(C)). The prion protein is a membrane glycoprotein that consists of two domains: a globul...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.811

    authors: Didonna A,Venturini AC,Hartman K,Vranac T,Čurin Šerbec V,Legname G

    更新日期:2015-03-19 00:00:00

  • Worldwide scientific productions with immunotherapy of sepsis: a bibliometric analysis.

    abstract:Background:Sepsis represents a significant healthcare problem worldwide and causes a high number of deaths every year but remains to be fully understood. During and after sepsis, the host immune response is complex and involves an initial excessive host inflammatory response to infection that is closely related to tiss...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.7116

    authors: Wan R,Li L,Xing C,Peng R,Gao L

    更新日期:2019-06-17 00:00:00

  • A randomized clinical trial of vitamin D3 (cholecalciferol) in ulcerative colitis patients with hypovitaminosis D3.

    abstract:AIM:To prospectively evaluate the effects of vitamin D3 on disease activity and quality of life in ulcerative colitis (UC) patients with hypovitaminosis D. METHODS:The study was a prospective double-blinded, randomized trial conducted at Community Regional Medical Center, Fresno, CA from 2012-2013. Patients with UC an...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.3654

    authors: Mathur J,Naing S,Mills P,Limsui D

    更新日期:2017-08-03 00:00:00

  • The fossil Osmundales (Royal Ferns)-a phylogenetic network analysis, revised taxonomy, and evolutionary classification of anatomically preserved trunks and rhizomes.

    abstract::The Osmundales (Royal Fern order) originated in the late Paleozoic and is the most ancient surviving lineage of leptosporangiate ferns. In contrast to its low diversity today (less than 20 species in six genera), it has the richest fossil record of any extant group of ferns. The structurally preserved trunks and rhizo...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.3433

    authors: Bomfleur B,Grimm GW,McLoughlin S

    更新日期:2017-07-11 00:00:00

  • Characteristics and outcomes of hemodialysis patients with COVID-19: a retrospective single center study.

    abstract:Background:The coronavirus 19 (COVID-19) pandemic has heightened the threat to the health and lives of patients with comorbid diseases. Infection by COVID-19 is especially detrimental to patients on hemodialysis. In this study, we evaluated the clinical characteristics, laboratory findings, treatments and prognoses of ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.10459

    authors: Luo Y,Li J,Liu Z,Yu H,Peng X,Cao C

    更新日期:2020-11-26 00:00:00

  • Merging cranial histology and 3D-computational biomechanics: a review of the feeding ecology of a Late Triassic temnospondyl amphibian.

    abstract::Finite Element Analysis (FEA) is a useful method for understanding form and function. However, modelling of fossil taxa invariably involves assumptions as a result of preservation-induced loss of information in the fossil record. To test the validity of predictions from FEA, given such assumptions, these results could...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.4426

    authors: Konietzko-Meier D,Gruntmejer K,Marcé-Nogué J,Bodzioch A,Fortuny J

    更新日期:2018-02-26 00:00:00

  • Morphology of the jaw, suspensorial, and opercle musculature of Beloniformes and related species (Teleostei: Acanthopterygii), with a special reference to the m. adductor mandibulae complex.

    abstract::The taxon Beloniformes represents a heterogeneous group of teleost fishes that show an extraordinary diversity of jaw morphology. I present new anatomical descriptions of the jaw musculature in six selected beloniforms and four closely related species. A reduction of the external jaw adductor (A1) and a changed morpho...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.769

    authors: Werneburg I

    更新日期:2015-02-24 00:00:00

  • Composable languages for bioinformatics: the NYoSh experiment.

    abstract::Language WorkBenches (LWBs) are software engineering tools that help domain experts develop solutions to various classes of problems. Some of these tools focus on non-technical users and provide languages to help organize knowledge while other workbenches provide means to create new programming languages. A key advant...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.241

    authors: Simi M,Campagne F

    更新日期:2014-01-02 00:00:00

  • More of the same: allopatric humpback whale populations share acoustic repertoire.

    abstract:Background:Humpback whales (Megaptera novaeangliae) are a widespread, vocal baleen whale best known for producing song, a complex, repetitive, geographically distinct acoustic signal sung by males, predominantly in a breeding context. Humpback whales worldwide also produce non-song vocalizations ("calls") throughout th...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.5365

    authors: Fournet MEH,Jacobsen L,Gabriele CM,Mellinger DK,Klinck H

    更新日期:2018-07-30 00:00:00

  • Agrobacterium rhizogenes-mediated transformation of Pisum sativum L. roots as a tool for studying the mycorrhizal and root nodule symbioses.

    abstract::In this study, we demonstrated the successful transformation of two pea (Pisum sativum L.) cultivars using Agrobacterium rhizogenes, whereby transgenic roots in the resulting composite plants showed expression of the gene encoding the green fluorescent protein. Subsequent to infection with A. rhizogenes, approximately...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.6552

    authors: Leppyanen IV,Kirienko AN,Dolgikh EA

    更新日期:2019-03-06 00:00:00

  • An attention bias test to assess anxiety states in laying hens.

    abstract::Fear is a response to a known threat, anxiety is a response to a perceived threat. Both of these affective states can be detrimental to animal welfare in modern housing environments. In comparison to the well-validated tests for assessing fear in laying hens, tests for measuring anxiety are less developed. Perception ...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.7303

    authors: Campbell DLM,Taylor PS,Hernandez CE,Stewart M,Belson S,Lee C

    更新日期:2019-07-10 00:00:00

  • Keraphyton gen. nov., a new Late Devonian fern-like plant from Australia.

    abstract::The first plants related to the ferns are represented by several extinct groups that emerged during the Devonian. Among them, the iridopterids are closely allied to the sphenopsids, a group represented today by the genus Equisetum. They have been documented in Middle to early Late Devonian deposits of Laurussia and th...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.9321

    authors: Champreux A,Meyer-Berthaud B,Decombeix AL

    更新日期:2020-06-16 00:00:00

  • A comprehensive investigation of mesophotic coral ecosystems in the Hawaiian Archipelago.

    abstract::Although the existence of coral-reef habitats at depths to 165 m in tropical regions has been known for decades, the richness, diversity, and ecological importance of mesophotic coral ecosystems (MCEs) has only recently become widely acknowledged. During an interdisciplinary effort spanning more than two decades, we c...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.2475

    authors: Pyle RL,Boland R,Bolick H,Bowen BW,Bradley CJ,Kane C,Kosaki RK,Langston R,Longenecker K,Montgomery A,Parrish FA,Popp BN,Rooney J,Smith CM,Wagner D,Spalding HL

    更新日期:2016-10-04 00:00:00

  • Complete genome sequencing of Pandoraea pnomenusa RB38 and Molecular Characterization of Its N-acyl homoserine lactone synthase gene ppnI.

    abstract::In this study, we sequenced the genome of Pandoraea pnomenusa RB38 using Pacific Biosciences RSII (PacBio) Single Molecule Real Time (SMRT) sequencing technology. A pair of cognate luxI/R homologs was identified where the luxI homolog, ppnI, was found adjacent to a luxR homolog, ppnR1. An additional orphan luxR homolo...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.1225

    authors: Lim YL,Ee R,How KY,Lee SK,Yong D,Tee KK,Yin WF,Chan KG

    更新日期:2015-08-27 00:00:00

  • Diversity and evolution of the endosymbionts of Bemisia tabaci in China.

    abstract::The whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is a cryptic species complex, including members that are pests of global importance. This study presents a screening of B. tabaci species in China for infection by the primary endosymbiont, Portiera aleyrodidarum, and two secondary endosymbionts, Arsenop...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.5516

    authors: Tang XT,Cai L,Shen Y,Du YZ

    更新日期:2018-08-29 00:00:00

  • A juvenile subfossil crocodylian from Anjohibe Cave, Northwestern Madagascar.

    abstract::Madagascar's subfossil record preserves a diverse community of animals including elephant birds, pygmy hippopotamus, giant lemurs, turtles, crocodiles, bats, rodents, and carnivorans. These fossil accumulations give us a window into the island's past from 80,000 years ago to a mere few hundred years ago, recording the...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.2296

    authors: Mathews JC,Samonds KE

    更新日期:2016-09-15 00:00:00

  • Distributional dynamics of a vulnerable species in response to past and future climate change: a window for conservation prospects.

    abstract:Background:The ongoing change in climate is predicted to exert unprecedented effects on Earth's biodiversity at all levels of organization. Biological conservation is important to prevent biodiversity loss, especially for species facing a high risk of extinction. Understanding the past responses of species to climate c...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.4287

    authors: Bai Y,Wei X,Li X

    更新日期:2018-01-16 00:00:00

  • Genome-wide characterization and expression analysis of soybean trihelix gene family.

    abstract::Trihelix transcription factors play multiple roles in plant growth, development and various stress responses. In this study, we identified 71 trihelix family genes in the soybean genome. These trihelix genes were located at 19 out of 20 soybean chromosomes unevenly and were classified into six distinct subfamilies: GT...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.8753

    authors: Liu W,Zhang Y,Li W,Lin Y,Wang C,Xu R,Zhang L

    更新日期:2020-03-13 00:00:00

  • Historical reconstruction of climatic and elevation preferences and the evolution of cloud forest-adapted tree ferns in Mesoamerica.

    abstract:BACKGROUND:Cloud forests, characterized by a persistent, frequent or seasonal low-level cloud cover and fragmented distribution, are one of the most threatened habitats, especially in the Neotropics. Tree ferns are among the most conspicuous elements in these forests, and ferns are restricted to regions in which minimu...

    journal_title:PeerJ

    pub_type: 杂志文章

    doi:10.7717/peerj.2696

    authors: Sosa V,Ornelas JF,Ramírez-Barahona S,Gándara E

    更新日期:2016-11-16 00:00:00