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  1. Article ; Online: The case for research integration, from genomics to remote sensing, to understand biodiversity change and functional dynamics in the world's lakes.

    Thackeray, Stephen J / Hampton, Stephanie E

    Global change biology

    2020  Volume 26, Issue 6, Page(s) 3230–3240

    Abstract: ... including traditional taxonomic and newer types of data (e.g., eDNA, remote sensing), to more ... Freshwater ecosystems are heavily impacted by multiple stressors, and a freshwater biodiversity ... crisis is underway. This realization has prompted calls to integrate global freshwater ecosystem data ...

    Abstract Freshwater ecosystems are heavily impacted by multiple stressors, and a freshwater biodiversity crisis is underway. This realization has prompted calls to integrate global freshwater ecosystem data, including traditional taxonomic and newer types of data (e.g., eDNA, remote sensing), to more comprehensively assess change among systems, regions, and organism groups. We argue that data integration should be done, not only with the important purpose of filling gaps in spatial, temporal, and organismal representation, but also with a more ambitious goal: to study fundamental cross-scale biological phenomena. Such knowledge is critical for discerning and projecting ecosystem functional dynamics, a realm of study where generalizations may be more tractable than those relying on taxonomic specificity. Integration could take us beyond cataloging biodiversity losses, and toward predicting ecosystem change more broadly. Fundamental biology questions should be central to integrative, interdisciplinary research on causal ecological mechanisms, combining traditional measures and more novel methods at the leading edge of the biological sciences. We propose a conceptual framework supporting this vision, identifying key questions and uncertainties associated with realizing this research potential. Our framework includes five interdisciplinary "complementarities." First, research approaches may provide comparative complementarity when they offer separate realizations of the same focal phenomenon. Second, for translational complementarity, data from one research approach is used to translate that from another, facilitating new inferences. Thirdly, causal complementarity arises when combining approaches allows us to "fill in" cause-effect relationships. Fourth, contextual complementarity is realized when together research methodologies establish the wider ecological and spatiotemporal context within which focal biological responses occur. Finally, integration may allow us to cross inferential scales through scaling complementarity. Explicitly identifying the modes and purposes of integrating research approaches, and reaching across disciplines to establish appropriate collaboration will allow researchers to address major biological questions that are more than the sum of the parts.
    MeSH term(s) Biodiversity ; Ecosystem ; Genomics ; Lakes ; Remote Sensing Technology
    Language English
    Publishing date 2020-03-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 1281439-8
    ISSN 1365-2486 ; 1354-1013
    ISSN (online) 1365-2486
    ISSN 1354-1013
    DOI 10.1111/gcb.15045
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Grazing impacts of rotifer zooplankton on a cyanobacteria bloom in a shallow temperate lake (Vancouver Lake, WA, USA)

    Sweeney, Kathryn / Rollwagen-Bollens, Gretchen / Hampton, Stephanie E.

    Hydrobiologia. 2022 July, v. 849, no. 12

    2022  

    Abstract: ... grazers (i.e., ciliates) were likely responsible for the initial dissipation of cyanobacteria just after ...

    Abstract Grazing by microzooplankton has been shown to significantly impact freshwater cyanobacteria blooms; however, the contribution of rotifers to the overall effect of microzooplankton grazing is not well understood. We conducted monthly microzooplankton community grazing (dilution) experiments June–October 2019, concurrent with incubations of field-collected rotifers feeding upon the natural assemblage of microplankton prey < 75 µm in Vancouver Lake (Washington State, USA), a lake annually affected by cyanobacteria blooms. Our results showed that just days after a large bloom, the microzooplankton community grazing impact on phytoplankton biomass was exceptionally high (> 1000% d⁻¹), yet the impact by rotifers was low (< 1% d⁻¹). As the bloom diminished in September and October, the grazing impact of rotifers increased dramatically, specifically consuming substantial dinoflagellate (≤ 574%) and ciliate (≤ 382%) biomass daily. Analysis of rotifers in Vancouver Lake during these months showed the presence of large, carnivorous Asplanchna spp., which indicates multi-trophic grazing dynamics within the rotifer assemblage. We conclude that non-rotifer micro-grazers (i.e., ciliates) were likely responsible for the initial dissipation of cyanobacteria just after the bloom peak, while rotifers primarily removed micro-grazers later in autumn. This study highlights the trophic roles of micro-grazers in controlling harmful cyanobacteria blooms and quantifies the specific grazing contributions of rotifers.
    Keywords Ciliophora ; Miozoa ; Rotifera ; Washington (state) ; autumn ; biomass ; carnivores ; freshwater ; lakes ; phytoplankton ; zooplankton
    Language English
    Dates of publication 2022-07
    Size p. 2683-2703.
    Publishing place Springer International Publishing
    Document type Article
    ZDB-ID 214428-1
    ISSN 1573-5117 ; 0018-8158
    ISSN (online) 1573-5117
    ISSN 0018-8158
    DOI 10.1007/s10750-022-04885-x
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Winter and summer storms modify chlorophyll relationships with nutrients in seasonally ice‐covered lakes

    Stephanie E. Hampton / Sapna Sharma / Matthew R. Brousil / Alessandro Filazzola

    Ecosphere, Vol 13, Iss 11, Pp n/a-n/a (2022)

    2022  

    Abstract: Abstract At broad spatial scales, primary productivity in lakes is known to increase in concert with nutrients, and variables that may disrupt or modify the tight coupling of nutrients and algae are of increasing interest, particularly for those shifting ...

    Abstract Abstract At broad spatial scales, primary productivity in lakes is known to increase in concert with nutrients, and variables that may disrupt or modify the tight coupling of nutrients and algae are of increasing interest, particularly for those shifting with climate change. Storms may disrupt algae–nutrient relationships, but the expected effects differ between winter and summer seasons, particularly for seasonally ice‐covered lakes. In winter, storms can dramatically change the under‐ice light environment, creating light limitation that disrupts algae–nutrient relationships. Further, storms can bring both snow that blocks light and also wind that blows snow off of ice. In open water conditions, storms may promote turbulence and external nutrient loading. Here, we test the hypotheses that winter and summer storms differentially affect algae–nutrient relationships across 84 seasonally ice‐covered lakes included in the Ecology Under Lake Ice dataset. While nutrients explained most of the variation in chlorophyll across these lakes, we found that secondary drivers differed between seasons. Under‐ice chlorophyll was higher under a variety of precipitation and wind conditions that tend to promote snow‐free clear ice, highlighting the importance of light as a limiting factor for algal growth during winter. In summer, higher water temperatures and storms corresponded with higher chlorophyll. Our study suggests that examining ice‐covered lakes in a gradient from the perennial ice cover of the poles to the intermittent ice cover of lower latitudes would yield key information on the shifts in light and nutrient limitation that control algal biomass.
    Keywords algal blooms ; climate change ; ice duration ; phytoplankton ; rain ; runoff ; Ecology ; QH540-549.5
    Language English
    Publishing date 2022-11-01T00:00:00Z
    Publisher Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article: Fewer blue lakes and more murky lakes across the continental U.S.: Implications for planktonic food webs.

    Leech, Dina M / Pollard, Amina I / Labou, Stephanie G / Hampton, Stephanie E

    Limnology and oceanography

    2020  Volume 63, Issue 6, Page(s) 2661–2680

    Abstract: ... in a nutrient-color paradigm (i.e., based on total phosphorus and true color) enables a more robust approach ... of ecosystem change in lakes, particularly when concurrent with eutrophication. Evaluation of lakes ...

    Abstract Elevated allochthonous inputs of organic matter are increasingly recognized as a driver of ecosystem change in lakes, particularly when concurrent with eutrophication. Evaluation of lakes in a nutrient-color paradigm (i.e., based on total phosphorus and true color) enables a more robust approach to research and management. To assess temporal and spatial patterns in nutrient-color status for U.S. lakes and associated food web attributes, we analyzed the U.S. Environmental Protection Agency's National Lakes Assessment (NLA) data. With 1000+ lakes sampled in 2007 and 2012 in a stratified random sampling design, the NLA enables rigorous assessment of lake condition across the continental U.S. We demonstrate that many U.S. lakes are simultaneously experiencing eutrophication and brownification to produce an abundance of "murky" lakes. Overall, "blue" lakes decreased by ~ 18% (46% of lakes in 2007 to 28% in 2012) while "murky" lakes increased by almost 12% (24% of lakes in 2007 to 35.4% in 2012). No statistical differences were observed in the proportions of "green" or "brown" lakes. Regionally, murky lakes significantly increased in the Northern Appalachian, Southern Plains, and Xeric ecoregions. Murky lakes exhibited the highest epilimnetic chlorophyll
    Language English
    Publishing date 2020-01-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 412737-7
    ISSN 0024-3590
    ISSN 0024-3590
    DOI 10.1002/lno.10967
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Ecology. Understanding lakes near and far.

    Hampton, Stephanie E

    Science (New York, N.Y.)

    2013  Volume 342, Issue 6160, Page(s) 815–816

    MeSH term(s) Climate Change ; Lakes ; Microalgae ; Plankton ; Satellite Imagery ; Water Pollution
    Language English
    Publishing date 2013-11-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.1244732
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Winter and summer storms modify chlorophyll relationships with nutrients in seasonally ice‐covered lakes

    Hampton, Stephanie E. / Śarmā, Sapanā / Brousil, Matthew R. / Filazzola, Alessandro

    Ecosphere. 2022 Nov., v. 13, no. 11 p.e4272-

    2022  

    Abstract: At broad spatial scales, primary productivity in lakes is known to increase in concert with nutrients, and variables that may disrupt or modify the tight coupling of nutrients and algae are of increasing interest, particularly for those shifting with ... ...

    Abstract At broad spatial scales, primary productivity in lakes is known to increase in concert with nutrients, and variables that may disrupt or modify the tight coupling of nutrients and algae are of increasing interest, particularly for those shifting with climate change. Storms may disrupt algae–nutrient relationships, but the expected effects differ between winter and summer seasons, particularly for seasonally ice‐covered lakes. In winter, storms can dramatically change the under‐ice light environment, creating light limitation that disrupts algae–nutrient relationships. Further, storms can bring both snow that blocks light and also wind that blows snow off of ice. In open water conditions, storms may promote turbulence and external nutrient loading. Here, we test the hypotheses that winter and summer storms differentially affect algae–nutrient relationships across 84 seasonally ice‐covered lakes included in the Ecology Under Lake Ice dataset. While nutrients explained most of the variation in chlorophyll across these lakes, we found that secondary drivers differed between seasons. Under‐ice chlorophyll was higher under a variety of precipitation and wind conditions that tend to promote snow‐free clear ice, highlighting the importance of light as a limiting factor for algal growth during winter. In summer, higher water temperatures and storms corresponded with higher chlorophyll. Our study suggests that examining ice‐covered lakes in a gradient from the perennial ice cover of the poles to the intermittent ice cover of lower latitudes would yield key information on the shifts in light and nutrient limitation that control algal biomass.
    Keywords algae ; biomass ; chlorophyll ; climate change ; data collection ; ice ; ice cover ; lakes ; primary productivity ; snow ; summer ; turbulent flow ; wind ; winter
    Language English
    Dates of publication 2022-11
    Publishing place John Wiley & Sons, Inc.
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 2572257-8
    ISSN 2150-8925
    ISSN 2150-8925
    DOI 10.1002/ecs2.4272
    Database NAL-Catalogue (AGRICOLA)

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  7. Article: Open science, reproducibility, and transparency in ecology.

    Powers, Stephen M / Hampton, Stephanie E

    Ecological applications : a publication of the Ecological Society of America

    2018  Volume 29, Issue 1, Page(s) e01822

    Abstract: Reproducibility is a key tenet of the scientific process that dictates the reliability and generality of results and methods. The complexities of ecological observations and data present novel challenges in satisfying needs for reproducibility and also ... ...

    Abstract Reproducibility is a key tenet of the scientific process that dictates the reliability and generality of results and methods. The complexities of ecological observations and data present novel challenges in satisfying needs for reproducibility and also transparency. Ecological systems are dynamic and heterogeneous, interacting with numerous factors that sculpt natural history and that investigators cannot completely control. Observations may be highly dependent on spatial and temporal context, making them very difficult to reproduce, but computational reproducibility can still be achieved. Computational reproducibility often refers to the ability to produce equivalent analytical outcomes from the same data set using the same code and software as the original study. When coded workflows are shared, authors and editors provide transparency for readers and allow other researchers to build directly and efficiently on primary work. These qualities may be especially important in ecological applications that have important or controversial implications for science, management, and policy. Expectations for computational reproducibility and transparency are shifting rapidly in the sciences. In this work, we highlight many of the unique challenges for ecology along with practical guidelines for reproducibility and transparency, as ecologists continue to participate in the stewardship of critical environmental information and ensure that research methods demonstrate integrity.
    MeSH term(s) Ecology ; Reproducibility of Results ; Research Design ; Software
    Language English
    Publishing date 2018-11-30
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1074505-1
    ISSN 1939-5582 ; 1051-0761
    ISSN (online) 1939-5582
    ISSN 1051-0761
    DOI 10.1002/eap.1822
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: An Evidence Synthesis of Pharmaceuticals and Personal Care Products (PPCPs) in the Environment: Imbalances among Compounds, Sewage Treatment Techniques, and Ecosystem Types.

    Meyer, Michael F / Powers, Stephen M / Hampton, Stephanie E

    Environmental science & technology

    2019  Volume 53, Issue 22, Page(s) 12961–12973

    Abstract: ... References to centralized STTs (e.g., activated sludge, 37%) were more frequent than decentralized STTs (e.g ... including underrepresented compounds (e.g., fragrances), sewage treatment techniques (e.g., septic systems ... and ecosystem types (e.g., lakes). ...

    Abstract Pharmaceuticals and personal care products (PPCPs) garner increasing attention globally for both their usefulness as indicators of human waste and their potency as emerging organic toxicants. Three decades of rapid increase in PPCP study combined with an increasing number of PPCPs on the global market have created an opportunity (1) to review trends in diversity of compounds, sewage treatment techniques (STTs), and ecosystems investigated as well as (2) to identify knowledge gaps in the literature. We conducted a quantitative evidence synthesis of 6517 abstracts from primary articles in the environmental PPCP literature by examining relative abundance of specific PPCP classes, STTs, and ecosystem types. Our results demonstrate that non-prescription drugs and antibiotics dominated PPCP abstracts, appearing in 51% and 39% of reviewed abstracts, respectively, in comparison to hormones (18%), prescription drugs (18%), fragrances (0.3%), and antioxidants (0.0%), which can all elicit physiological and ecological responses even at low concentrations. References to centralized STTs (e.g., activated sludge, 37%) were more frequent than decentralized STTs (e.g., septic, 2%), despite decentralized STTs being common and frequently high impact sources of sewage pollution worldwide. Freshwater lotic systems (63%) were more prevalent than freshwater lentic (24%) and terrestrial (20%) systems. This discrepancy is notable because the longer residence times of lentic and terrestrial systems may enable PPCPs to concentrate and thus increase risk of biological consequences. These results highlight distinct opportunities to address knowledge gaps in the environmental PPCP literature, including underrepresented compounds (e.g., fragrances), sewage treatment techniques (e.g., septic systems), and ecosystem types (e.g., lakes).
    MeSH term(s) Cosmetics ; Ecosystem ; Environmental Monitoring ; Humans ; Pharmaceutical Preparations ; Sewage ; Waste Disposal, Fluid ; Water Pollutants, Chemical
    Chemical Substances Cosmetics ; Pharmaceutical Preparations ; Sewage ; Water Pollutants, Chemical
    Language English
    Publishing date 2019-10-28
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 1520-5851
    ISSN (online) 1520-5851
    DOI 10.1021/acs.est.9b02966
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: The case for research integration, from genomics to remote sensing, to understand biodiversity change and functional dynamics in the world's lakes

    Thackeray, Stephen J / Hampton, Stephanie E

    Global change biology. 2020 June, v. 26, no. 6

    2020  

    Abstract: ... including traditional taxonomic and newer types of data (e.g., eDNA, remote sensing), to more ... Freshwater ecosystems are heavily impacted by multiple stressors, and a freshwater biodiversity ... crisis is underway. This realization has prompted calls to integrate global freshwater ecosystem data ...

    Abstract Freshwater ecosystems are heavily impacted by multiple stressors, and a freshwater biodiversity crisis is underway. This realization has prompted calls to integrate global freshwater ecosystem data, including traditional taxonomic and newer types of data (e.g., eDNA, remote sensing), to more comprehensively assess change among systems, regions, and organism groups. We argue that data integration should be done, not only with the important purpose of filling gaps in spatial, temporal, and organismal representation, but also with a more ambitious goal: to study fundamental cross‐scale biological phenomena. Such knowledge is critical for discerning and projecting ecosystem functional dynamics, a realm of study where generalizations may be more tractable than those relying on taxonomic specificity. Integration could take us beyond cataloging biodiversity losses, and toward predicting ecosystem change more broadly. Fundamental biology questions should be central to integrative, interdisciplinary research on causal ecological mechanisms, combining traditional measures and more novel methods at the leading edge of the biological sciences. We propose a conceptual framework supporting this vision, identifying key questions and uncertainties associated with realizing this research potential. Our framework includes five interdisciplinary “complementarities.” First, research approaches may provide comparative complementarity when they offer separate realizations of the same focal phenomenon. Second, for translational complementarity, data from one research approach is used to translate that from another, facilitating new inferences. Thirdly, causal complementarity arises when combining approaches allows us to “fill in” cause–effect relationships. Fourth, contextual complementarity is realized when together research methodologies establish the wider ecological and spatiotemporal context within which focal biological responses occur. Finally, integration may allow us to cross inferential scales through scaling complementarity. Explicitly identifying the modes and purposes of integrating research approaches, and reaching across disciplines to establish appropriate collaboration will allow researchers to address major biological questions that are more than the sum of the parts.
    Keywords biodiversity ; environmental DNA ; freshwater ; freshwater ecosystems ; genomics ; global change ; interdisciplinary research
    Language English
    Dates of publication 2020-06
    Size p. 3230-3240.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note NAL-AP-2-clean ; JOURNAL ARTICLE
    ZDB-ID 1281439-8
    ISSN 1365-2486 ; 1354-1013
    ISSN (online) 1365-2486
    ISSN 1354-1013
    DOI 10.1111/gcb.15045
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: In vitro analysis and in vivo assessment of fracture complications associated with use of locking plate constructs for stabilization of caprine tibial segmental defects.

    Bowers, Kristin M / Wright, Ellis M / Terrones, Lori D / Sun, Xiaocun / Rifkin, Rebecca / Grzeskowiak, Remi / Croy, Elizabeth / Seddighi, Reza / Kleine, Stephanie / Hampton, Chiara / Hecht, Silke / Adair, Henry S / Anderson, David E / Mulon, Pierre-Yves

    Journal of experimental orthopaedics

    2023  Volume 10, Issue 1, Page(s) 38

    Abstract: Purpose: Locking plate fixation of caprine tibial segmental defects is widely utilized for translational modeling of human osteopathology, and it is a useful research model in tissue engineering and orthopedic biomaterials research due to its inherent ... ...

    Abstract Purpose: Locking plate fixation of caprine tibial segmental defects is widely utilized for translational modeling of human osteopathology, and it is a useful research model in tissue engineering and orthopedic biomaterials research due to its inherent stability while maintaining unobstructed visualization of the gap defect and associated healing. However, research regarding surgical technique and long-term complications associated with this fixation method are lacking. The goal of this study was to assess the effects of surgeon-selected factors including locking plate length, plate positioning, and relative extent of tibial coverage on fixation failure, in the form of postoperative fracture.
    Methods: In vitro, the effect of plate length was evaluated using single cycle compressive load to failure mechanical testing of locking plate fixations of caprine tibial gap defects. In vivo, effects of plate length, positioning, and relative tibial coverage were evaluated using data from a population of goats enrolled in ongoing orthopedic research which utilized locking plate fixation of 2 cm tibial diaphyseal segmental defects to evaluate bone healing over 3, 6, 9, and 12 months.
    Results: In vitro, no significant differences in maximum compressive load or total strain were noted between fixations using 14 cm locking plates and 18 cm locking plates. In vivo, both plate length and tibial coverage ratio were significantly associated with postoperative fixation failure. The incidence of any cortical fracture in goats stabilized with a 14 cm plate was 57%, as compared with 3% in goats stabilized with an 18 cm plate. Craniocaudal and mediolateral angular positioning variables were not significantly associated with fixation failure. Decreasing distance between the gap defect and the proximal screw of the distal bone segment was associated with increased incidence of fracture, suggesting an effect on proximodistal positioning on overall fixation stability.
    Conclusions: This study emphasizes the differences between in vitro modeling and in vivo application of surgical fixation methods, and, based on the in vivo results, maximization of plate-to-tibia coverage is recommended when using locking plate fixation of the goat tibial segmental defect as a model in orthopedic research.
    Language English
    Publishing date 2023-04-03
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2780021-0
    ISSN 2197-1153
    ISSN 2197-1153
    DOI 10.1186/s40634-023-00598-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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