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  1. Article ; Online: Air Quality during COVID-19 in Four Megacities: Lessons and Challenges for Public Health.

    Connerton, Patrick / Vicente de Assunção, João / Maura de Miranda, Regina / Dorothée Slovic, Anne / José Pérez-Martínez, Pedro / Ribeiro, Helena

    International journal of environmental research and public health

    2020  Volume 17, Issue 14

    Abstract: The study described in this manuscript analyzed the effects of quarantine and social distancing policies implemented due to the Coronavirus Disease 2019 (COVID-19) pandemic on air pollution levels in four western megacities: São Paulo in Brazil; Paris in ...

    Abstract The study described in this manuscript analyzed the effects of quarantine and social distancing policies implemented due to the Coronavirus Disease 2019 (COVID-19) pandemic on air pollution levels in four western megacities: São Paulo in Brazil; Paris in France; and Los Angeles and New York in the United States. The study investigated the levels of four air pollutants-Carbon monoxide (CO), Ozone (O
    MeSH term(s) Air Pollution/analysis ; Betacoronavirus/isolation & purification ; Brazil ; COVID-19 ; Cities ; Coronavirus Infections/epidemiology ; Coronavirus Infections/virology ; Humans ; Los Angeles ; New York City ; Pandemics ; Paris ; Particulate Matter/analysis ; Pneumonia, Viral/epidemiology ; Pneumonia, Viral/virology ; Public Health ; SARS-CoV-2
    Chemical Substances Particulate Matter
    Keywords covid19
    Language English
    Publishing date 2020-07-14
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2175195-X
    ISSN 1660-4601 ; 1661-7827
    ISSN (online) 1660-4601
    ISSN 1661-7827
    DOI 10.3390/ijerph17145067
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

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  2. Article ; Online: Air Quality during COVID-19 in Four Megacities

    Patrick Connerton / João Vicente de Assunção / Regina Maura de Miranda / Anne Dorothée Slovic / Pedro José Pérez-Martínez / Helena Ribeiro

    International Journal of Environmental Research and Public Health, Vol 17, Iss 5067, p

    Lessons and Challenges for Public Health

    2020  Volume 5067

    Abstract: The study described in this manuscript analyzed the effects of quarantine and social distancing policies implemented due to the Coronavirus Disease 2019 (COVID-19) pandemic on air pollution levels in four western megacities: São Paulo in Brazil; Paris in ...

    Abstract The study described in this manuscript analyzed the effects of quarantine and social distancing policies implemented due to the Coronavirus Disease 2019 (COVID-19) pandemic on air pollution levels in four western megacities: São Paulo in Brazil; Paris in France; and Los Angeles and New York in the United States. The study investigated the levels of four air pollutants—Carbon monoxide (CO), Ozone (O 3 ), Fine Particulate (PM 2.5 ) and Nitrogen dioxide (NO 2 )—during the month of March 2020, compared to 2015–2019, in the urban air of these metropolitan areas, controlling for meteorological variables. Results indicated reductions in the levels of PM 2.5 , CO and NO 2 , with reductions of the latter two showing statistical significance. In contrast, tropospheric ozone levels increased, except in Los Angeles. The beneficial health effects of cleaner air might also help prevent deaths caused by the epidemic of COVID-19 in megacities by diminishing pressure on hospitals and health equipment. Future actions for the re-starting of non-essential economic activities in these cities should take into consideration the overall importance of health for the individual, as well as for societies.
    Keywords air pollution ; Covid-19 ; urban health ; traffic reductions ; activity restrictions ; Medicine ; R ; covid19
    Subject code 333
    Language English
    Publishing date 2020-07-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Balancing prey availability and predator consumption: a multispecies stock assessment for Lake Ontario

    Fitzpatrick, Kimberly B. / Weidel, Brian C. / Connerton, Michael J. / Lantry, Jana R. / Holden, Jeremy P. / Yuille, Michael J. / Lantry, Brian / LaPan, Steven R. / Rudstam, Lars G. / Sullivan, Patrick J. / Brenden, Travis O. / Sethi, Suresh A.

    Canadian journal of fisheries and aquatic sciences. 2022 Mar. 30, v. 79, no. 9

    2022  

    Abstract: Trophic interactions are drivers of ecosystem change and stability, yet are often excluded from fishery assessment models, despite their potential capacity to improve estimates of species dynamics and future fishery sustainability. In Lake Ontario, ... ...

    Abstract Trophic interactions are drivers of ecosystem change and stability, yet are often excluded from fishery assessment models, despite their potential capacity to improve estimates of species dynamics and future fishery sustainability. In Lake Ontario, recreational salmonine fisheries, including Chinook salmon (Oncorhynchus tshawytscha) and lake trout (Salvelinus namaycush), depend on a single prey species, alewife (Alosa pseudoharengus). To accommodate strong trophic interactions among species, we developed a multispecies statistical catch-at-age assessment (MSCAA) model that links the dynamics of the salmonine fisheries and alewife via prey consumption and predator growth. We found that prey availability had declined since 2015 due to decreased alewife recruitment and increased Chinook salmon biomass, leading to higher alewife mortality rates and lower predator growth rates. Forward projections of predator–prey dynamics suggest that Chinook salmon stocking reductions may improve the probability for alewife population growth, but could be counteracted by increased natural Chinook salmon recruitment. Combined with predator- and prey-monitoring efforts, multispecies assessments show promise as models of intermediate complexity to support a transition to ecosystem-based approaches to fisheries management.
    Keywords Alosa pseudoharengus ; Oncorhynchus tshawytscha ; Salvelinus namaycush ; biomass ; ecosystems ; fisheries ; models ; mortality ; population growth ; prey species ; probability ; Lake Ontario
    Language English
    Dates of publication 2022-0330
    Size p. 1529-1545.
    Publishing place Canadian Science Publishing
    Document type Article
    ZDB-ID 1473089-3
    ISSN 1205-7533 ; 0706-652X
    ISSN (online) 1205-7533
    ISSN 0706-652X
    DOI 10.1139/cjfas-2021-0126
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Air Quality during COVID-19 in Four Megacities: Lessons and Challenges for Public Health

    Connerton, Patrick / Vicente de Assunção, João / Maura de Miranda, Regina / Dorothée Slovic, Anne / José Pérez-Martínez, Pedro / Ribeiro, Helena

    Int. j. environ. res. public health (Online)

    Abstract: The study described in this manuscript analyzed the effects of quarantine and social distancing policies implemented due to the Coronavirus Disease 2019 (COVID-19) pandemic on air pollution levels in four western megacities: São Paulo in Brazil; Paris in ...

    Abstract The study described in this manuscript analyzed the effects of quarantine and social distancing policies implemented due to the Coronavirus Disease 2019 (COVID-19) pandemic on air pollution levels in four western megacities: São Paulo in Brazil; Paris in France; and Los Angeles and New York in the United States. The study investigated the levels of four air pollutants-Carbon monoxide (CO), Ozone (O3), Fine Particulate (PM2.5) and Nitrogen dioxide (NO2)-during the month of March 2020, compared to 2015-2019, in the urban air of these metropolitan areas, controlling for meteorological variables. Results indicated reductions in the levels of PM2.5, CO and NO2, with reductions of the latter two showing statistical significance. In contrast, tropospheric ozone levels increased, except in Los Angeles. The beneficial health effects of cleaner air might also help prevent deaths caused by the epidemic of COVID-19 in megacities by diminishing pressure on hospitals and health equipment. Future actions for the re-starting of non-essential economic activities in these cities should take into consideration the overall importance of health for the individual, as well as for societies.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #649803
    Database COVID19

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article: Status of Mysis diluviana in Lake Ontario in 2013: Lower abundance but higher fecundity than in the 1990s

    Holda, Toby J / Brian C. Weidel / James M. Watkins / Jeremy P. Holden / Kelly L. Bowen / Lars G. Rudstam / Michael J. Connerton / Patrick J. Sullivan

    International Association for Great Lakes Research Journal of Great Lakes research. 2019 Apr., v. 45, no. 2

    2019  

    Abstract: Mysis diluviana is a major component of prey fish diets in the Great Lakes, so annual production of M. diluviana is important for understanding and modeling energy flow through Great Lakes food webs. However, only three lake-wide measurements of M. ... ...

    Abstract Mysis diluviana is a major component of prey fish diets in the Great Lakes, so annual production of M. diluviana is important for understanding and modeling energy flow through Great Lakes food webs. However, only three lake-wide measurements of M. diluviana annual production in Lake Ontario are currently available (1971, 1990, 1995). During 2013, lake-wide coverage of Lake Ontario was achieved during four periods from April to November. Annual mean density and biomass of M. diluviana in 2013 were 99 #/m2 (SE: 8) and 318 mg dw/m2 (SE: 28) – approximately half of values observed in 1990s. M. diluviana comprised 13–30% of offshore zooplankton biomass in each period. Reproduction peaked in fall, with mean brood size of 32 embryos (range: 11–49), at least 10% larger than in 1990s. Generation time was two years from embryo to initial reproduction. Growth rates were 0.052 mm/d for the age-0 cohort and 0.027 mm/d for the age-1 cohort. Age-0 growth rate was significantly higher than in 1980s–90s (0.035 mm/d). Annual production in 2013 was 0.85 g dw/m2/yr (SE: 0.03) which was 30–40% of values observed in 1990 and 1995 (2.23 and 2.53 g/m2/yr). Annual production to biomass ratio (P/B) in 2013 was 2.65 /yr which was 80–85% of values observed in 1990 and 1995 (3.24 and 3.11 /yr), but this difference was not statistically significant. Our results suggest that changes in annual production over time can be estimated using changes in biomass over time and a mean P/B ratio.
    Keywords biomass ; diet ; energy flow ; fecundity ; food webs ; forage fish ; models ; Mysis diluviana ; zooplankton ; Lake Ontario
    Language English
    Dates of publication 2019-04
    Size p. 307-316.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2163239-X
    ISSN 0380-1330 ; 0380-1330
    ISSN (online) 0380-1330
    ISSN 0380-1330
    DOI 10.1016/j.jglr.2019.01.007
    Database NAL-Catalogue (AGRICOLA)

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  6. Article: Vertical distribution of alewife in the Lake Ontario offshore: Implications for resource use

    Riha, Milan / Brian C. Weidel / Jeremy Holden / Lars G. Rudstam / Maureen G. Walsh / Michael J. Connerton / Patrick J. Sullivan / Toby J. Holda

    Journal of Great Lakes research. 2017 Oct., v. 43, no. 5

    2017  

    Abstract: Oligotrophication of Lake Ontario has led to increased water clarity and an increased proportion of zooplankton residing in the metalimnion during the day, which may affect the utilization of different depth regions for planktivorous fish. We ... ...

    Abstract Oligotrophication of Lake Ontario has led to increased water clarity and an increased proportion of zooplankton residing in the metalimnion during the day, which may affect the utilization of different depth regions for planktivorous fish. We investigated day and night distributions of fish using hydroacoustics and suspended vertical gillnets during the summer of 2013 when a deep chlorophyll layer (DCL) was established. We related fish distributions to concurrent measures of temperature and prey (zooplankton) density. Alewife dominated in vertical gill net catches, indicating that most acoustic targets were alewife. Alewife schooled during the day in the bottom of the mixed layer, and at dusk alewife schools broke up and fish moved towards the surface. We hypothesize this movement followed migrating zooplankton to allow feeding at night; alewife sampled from vertical gillnets fed on cyclopoid copepods and cladocerans, prey groups that migrate into the epilimnion at night. Some alewife remained at the bottom of the mixed layer at night and these fish ate deep-water calanoid copepods such as Limnocalanus. Vertical distributions were best predicted by temperature and the interaction between temperature and zooplankton density. We include uplooking acoustics data to complement our downlooking datasets, which provided evidence for potential bias in downlooking acoustic assessments of alewife due to high proportions of alewife found in the surface exclusion zone. Our approach combining several datasets provides a new perspective to understand summer diel distribution of alewife and the factors driving their distribution.
    Keywords acoustics ; Alosa pseudoharengus ; chlorophyll ; Copepoda ; data collection ; fish ; gillnets ; oligotrophication ; planktivores ; schools ; spatial distribution ; summer ; temperature ; water quality ; zooplankton ; Lake Ontario
    Language English
    Dates of publication 2017-10
    Size p. 823-837.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2163239-X
    ISSN 0380-1330 ; 0380-1330
    ISSN (online) 0380-1330
    ISSN 0380-1330
    DOI 10.1016/j.jglr.2017.07.007
    Database NAL-Catalogue (AGRICOLA)

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