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  • 1
    Online Resource
    Online Resource
    Latest Devonian to earliest Carboniferous conodont and carbon isotope stratigraphy of a shallow‐water sequence in South China
    Wiley ; 2016
    In:  Geological Journal Vol. 51, No. 6 ( 2016-11), p. 915-935
    Details
    In: Geological Journal, Wiley, Vol. 51, No. 6 ( 2016-11), p. 915-935
    Abstract: To improve regional and intercontinental correlation of the uppermost Devonian–lowermost Carboniferous, we examined the conodont faunas and carbon isotopic records of the Tangbagou Formation in the Qilinzhai section, southern Guizhou, South China. The Tangbagou Formation is a succession of mixed carbonate–siliciclastic rocks that accumulated on a shallow‐water platform under normal marine conditions. Seven conodont zones for shallow‐water biofacies in South China, the Cl . gilwernensis–Cl . unicornis Zone, the Po . spicatus Zone, the Si . homosimplex Zone, the Si . sinensis Zone, the Si . eurylobata Zone, the Ps . multistriatus Zone and the Po . co . porcatus Zone in ascending order, are recognized in the Tangbagou Formation. Although apparently limited in its value for global correlation, this conodont zonation is more applicable to shallow‐water biofacies in South China. Carbonate samples have yielded carbon isotopic signatures consistent with those recorded in Euroamerica sections, in particular showing four distinct characteristics: (1) the peak values of Hangenberg Carbon Isotope Excursion (HICE) during the latest Devonian, (2) a minor positive shift (P1) in the Si . homosimplex Zone during the early Tournaisian, (3) a second minor positive shift (P2) in the Si . sinensis Zone and (4) the middle Tournaisian Carbon Isotope Excursion (TICE) in the middle part of the Tangbagou Formation. The similarity in peak values (~5.5‰) and magnitude of TICE for the Qilinzhai and Belgian sections indicates that the Euro‐asia δ 13 C carb trends may reflect the changes in global mean ocean δ 13 C DIC , rather than having been overprinted by local carbon cycling. Integration of conodont biostratigraphy and δ 13 C stratigraphy provides a powerful tool for stratigraphic correlation. Copyright © 2015 John Wiley & Sons, Ltd.
    Type of Medium: Online Resource
    ISSN: 0072-1050 , 1099-1034
    URL: Issue
    URL: Article
    DOI: 10.1002/gj.v51.6
    DOI: 10.1002/gj.2710
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 1479201-1
    SSG: 13
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  • 2
    Online Resource
    Online Resource
    Millennial‐scale change on a Caribbean reef system that experiences hypoxia
    Wiley ; 2021
    In:  Ecography Vol. 44, No. 9 ( 2021-09), p. 1270-1282
    Details
    In: Ecography, Wiley, Vol. 44, No. 9 ( 2021-09), p. 1270-1282
    Abstract: Coastal hypoxia has become an increasingly acknowledged threat to coral reefs that is potentially intensifying because of increased input of anthropogenic nutrients. Almirante Bay (Caribbean Panama) is a semi‐enclosed system that experiences hypoxia in deeper waters which occasionally shoals onto shallow coral reefs, suffocating most aerobic benthic life. To explore the long‐term history of reefs in the bay we extracted reef matrix cores from two reefs that today experience contrasting patterns of oxygenation. We constructed a 1800‐year‐long record of gastropod assemblages and isotope compositions from six U‐Th chronologically‐constrained reef matrix cores. We extracted two cores from each reef at 3 m water depth and two additional cores from a deeper part (4.8 m) of the hypoxia‐exposed reef. Results show that the deeper part of the hypoxic reef slowed in growth and stopped accreting approximately 1500 years BP while the shallow part of the reef continued to accrete to the present day, in agreement with a model of expanding hypoxia at this time. Our proxy‐based approach suggests that the patterns of increasing herbivores and decreasing carbon isotope values in the deeper part of the hypoxic reef may have been driven by an increase in hypoxia via eutrophication caused by either natural changes or human impacts. Similar patterns in these paleoindicators occurred in the shallow part of the hypoxic reef during the last few decades. This suggests that the deep water hypoxia may be expanding to depths as shallow as 3 m and that shallow reefs are at greater risk due to increased human activity.
    Type of Medium: Online Resource
    ISSN: 0906-7590 , 1600-0587
    URL: Issue
    URL: Article
    DOI: 10.1111/ecog.2021.v44.i9
    DOI: 10.1111/ecog.05606
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2024917-2
    detail.hit.zdb_id: 1112659-0
    SSG: 12
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  • 3
    Online Resource
    Online Resource
    Characterization and Origin of Dissolved Organic Carbon in Yegua Ground Water in Brazos County, Texas
    Wiley ; 2001
    In:  Ground Water Vol. 39, No. 5 ( 2001-09), p. 760-767
    Details
    In: Ground Water, Wiley, Vol. 39, No. 5 ( 2001-09), p. 760-767
    Type of Medium: Online Resource
    ISSN: 0017-467X , 1745-6584
    URL: Issue
    URL: Article
    DOI: 10.1111/gwat.2001.39.issue-5
    DOI: 10.1111/j.1745-6584.2001.tb02367.x
    Language: English
    Publisher: Wiley
    Publication Date: 2001
    detail.hit.zdb_id: 2066386-9
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  • 4
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    Online Resource
    Investigation of the thermal history of the Delaware Basin (West Texas, USA) using carbonate clumped isotope thermometry
    Wiley ; 2020
    In:  Basin Research Vol. 32, No. 5 ( 2020-10), p. 1140-1155
    Details
    In: Basin Research, Wiley, Vol. 32, No. 5 ( 2020-10), p. 1140-1155
    Abstract: We utilized carbonate clumped isotope thermometry to explore the thermal history of the Delaware Basin, West Texas, USA. Carbonate wellbore cuttings from five oil/gas wells across the basin yielded clumped isotope temperatures (T(Δ 47 )) ranging from 27°C to 307°C, interpreted to reflect a combination of initial precipitation/recrystallization temperature and solid‐state C‐O bond reordering during burial. Dolomite samples generally record lower apparent T(Δ 47 )s than calcite, reflecting greater resistance to reordering in dolomite. In all five wells, clumped isotope temperatures exceed modern downhole temperature measurements, indicating higher heat flow in the past. Using modelled burial curves based on sedimentological history, we created unique time‐temperature histories by linearly applying a geothermal gradient. Applying two different thermal history reordering models, we modelled the extent of solid‐state C–O bond reordering to iteratively find the time‐averaged best‐fit geothermal gradients for each of the five wells. Results of this modelling suggest that the shallower, southwestern portion of the study area experienced higher geothermal gradients throughout the sediment history (~45°C/km) than did the deeper, southeastern portion (~32°C/km), with the northern portion experiencing intermediate geothermal gradients (~35–38°C/km). This trend is in agreement with the observed gas/oil ratios of the Delaware Basin, increasing from east to west. Furthermore, our clumped isotope temperatures agree well with previously published vitrinite reflectance data, confirming previous observations and demonstrating the utility of carbonate clumped isotope thermometry to reconstruct basin thermal histories.
    Type of Medium: Online Resource
    ISSN: 0950-091X , 1365-2117
    URL: Issue
    URL: Article
    DOI: 10.1111/bre.v32.5
    DOI: 10.1111/bre.12419
    RVK:
    TE 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2019914-4
    SSG: 16,13
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  • 5
    Online Resource
    Online Resource
    Scientists' Perspective on Introducing Authentic Inquiry to High School Teachers During an Intensive Three‐Week Summer Professional Development Experience
    Wiley ; 2009
    In:  School Science and Mathematics Vol. 109, No. 3 ( 2009-03), p. 162-174
    Details
    In: School Science and Mathematics, Wiley, Vol. 109, No. 3 ( 2009-03), p. 162-174
    Abstract: The Information Technology in Science (ITS) Center for Teaching and Learning was a National Science Foundation funded program to provide high‐quality professional development for 7–12th grade science teachers. The subgroup on which this paper focuses was immersed in an innovative approach to understanding chemistry of the environment. The group was comprised of 10 high school science teachers representative of science classes taught at all grade levels (9–12th). A team of four university professors led the group. The professors developed inquiry modules and communicated some of the intricacies of their research for adaptation to the participants' classrooms. This paper communicates the successful implementation and lessons learned by scientists during the course of an inquiry‐based curriculum during summer 2005. The process and pace at which the material was covered, qualitative information about the attitudes of the participants towards the curriculum, and implications for professional development from the point of view of the science team leaders will be discussed. Analysis of time spent with participants revealed the progression and type of activities chosen for the professional development experience were effective. Results from informal participant interviews revealed they were most comfortable in incorporating inquiry into their classrooms after having been immersed in it themselves.
    Type of Medium: Online Resource
    ISSN: 0036-6803 , 1949-8594
    URL: Issue
    URL: Article
    DOI: 10.1111/ssm.2009.109.issue-3
    DOI: 10.1111/j.1949-8594.2009.tb17952.x
    Language: English
    Publisher: Wiley
    Publication Date: 2009
    detail.hit.zdb_id: 412876-X
    detail.hit.zdb_id: 2043346-3
    SSG: 17,1
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  • 6
    Online Resource
    Online Resource
    Factors Influencing Methane Distribution in Texas Ground Water
    Wiley ; 1998
    In:  Ground Water Vol. 36, No. 1 ( 1998-01), p. 58-66
    Details
    In: Ground Water, Wiley, Vol. 36, No. 1 ( 1998-01), p. 58-66
    Type of Medium: Online Resource
    ISSN: 0017-467X , 1745-6584
    URL: Issue
    URL: Article
    DOI: 10.1111/gwat.1998.36.issue-1
    DOI: 10.1111/j.1745-6584.1998.tb01065.x
    Language: English
    Publisher: Wiley
    Publication Date: 1998
    detail.hit.zdb_id: 2066386-9
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  • 7
    Online Resource
    Online Resource
    BioTIME: A database of biodiversity time series for the Anthropocene
    Wiley ; 2018
    In:  Global Ecology and Biogeography Vol. 27, No. 7 ( 2018-07), p. 760-786
    Details
    In: Global Ecology and Biogeography, Wiley, Vol. 27, No. 7 ( 2018-07), p. 760-786
    Abstract: The BioTIME database contains raw data on species identities and abundances in ecological assemblages through time. These data enable users to calculate temporal trends in biodiversity within and amongst assemblages using a broad range of metrics. BioTIME is being developed as a community‐led open‐source database of biodiversity time series. Our goal is to accelerate and facilitate quantitative analysis of temporal patterns of biodiversity in the Anthropocene. Main types of variables included The database contains 8,777,413 species abundance records, from assemblages consistently sampled for a minimum of 2 years, which need not necessarily be consecutive. In addition, the database contains metadata relating to sampling methodology and contextual information about each record. Spatial location and grain BioTIME is a global database of 547,161 unique sampling locations spanning the marine, freshwater and terrestrial realms. Grain size varies across datasets from 0.0000000158 km 2 (158 cm 2 ) to 100 km 2 (1,000,000,000,000 cm 2 ). Time period and grain BioTIME records span from 1874 to 2016. The minimal temporal grain across all datasets in BioTIME is a year. Major taxa and level of measurement BioTIME includes data from 44,440 species across the plant and animal kingdoms, ranging from plants, plankton and terrestrial invertebrates to small and large vertebrates. Software format .csv and .SQL.
    Type of Medium: Online Resource
    ISSN: 1466-822X , 1466-8238
    URL: Issue
    URL: Article
    DOI: 10.1111/geb.2018.27.issue-7
    DOI: 10.1111/geb.12729
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1479787-2
    detail.hit.zdb_id: 2021283-5
    SSG: 12
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