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  1. Article ; Online: Sampling re-design increases power to detect change in the Great Barrier Reef's inshore water quality.

    Lloyd-Jones, Luke R / Kuhnert, Petra M / Lawrence, Emma / Lewis, Stephen E / Waterhouse, Jane / Gruber, Renee K / Kroon, Frederieke J

    PloS one

    2022  Volume 17, Issue 7, Page(s) e0271930

    Abstract: Monitoring programs are fundamental to understanding the state and trend of aquatic ecosystems. Sampling designs are a crucial component of monitoring programs and ensure that measurements evaluate progress toward clearly stated management objectives, ... ...

    Abstract Monitoring programs are fundamental to understanding the state and trend of aquatic ecosystems. Sampling designs are a crucial component of monitoring programs and ensure that measurements evaluate progress toward clearly stated management objectives, which provides a mechanism for adaptive management. Here, we use a well-established marine monitoring program for inshore water quality in the Great Barrier Reef (GBR), Australia to investigate whether a sampling re-design has increased the program's capacity to meet its primary objectives. Specifically, we use bootstrap resampling to assess the change in statistical power to detect temporal water quality trends in a 15-year inshore marine water quality data set that includes data from both before and after the sampling re-design. We perform a comprehensive power analysis for six water quality analytes at four separate study areas in the GBR Marine Park and find that the sampling re-design (i) increased power to detect trends in 23 of the 24 analyte-study area combinations, and (ii) resulted in an average increase in power of 34% to detect increasing or decreasing trends in water quality analytes. This increase in power is attributed more to the addition of sampling locations than increasing the sampling rate. Therefore, the sampling re-design has substantially increased the capacity of the program to detect temporal trends in inshore marine water quality. Further improvements in sampling design need to focus on the program's capability to reliably detect trends within realistic timeframes where inshore improvements to water quality can be expected to occur.
    MeSH term(s) Australia ; Coral Reefs ; Ecosystem ; Environmental Monitoring/methods ; Water Quality
    Language English
    Publishing date 2022-07-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0271930
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  2. Thesis ; Online: Interactions between an estuarine submersed plant bed and its physical and biogeochemical environment

    Gruber, Renee K.

    Seasonal and spatial variation

    2009  

    Abstract: Annual cycles of growth and morphology were analyzed in a bed of the canopy-forming submersed aquatic vegetation (SAV) species, Stuckenia pectinata, in relation to seasonal water quality conditions in a Chesapeake Bay tributary. A rapid accumulation of ... ...

    Abstract Annual cycles of growth and morphology were analyzed in a bed of the canopy-forming submersed aquatic vegetation (SAV) species, Stuckenia pectinata, in relation to seasonal water quality conditions in a Chesapeake Bay tributary. A rapid accumulation of aboveground plant material occurred during the spring period of high water clarity, which aided plants in circumventing light limitation during the summer period of low water clarity. During summer, this SAV bed strongly attenuated wave energy, which contributed to growth-promoting feedback effects that improved light and nutrient availability for plants. Modification of hydrodynamic conditions also resulted in several negative feedback effects on SAV growth. Feedbacks were regulated by plant stand size and density and seasonal changes in plant canopy architecture. The findings of this study illustrate the significant impacts SAV beds can have on their local environment, improving conditions and resulting in plant growth that could not otherwise occur in this degraded system.
    Keywords Ecology|Environmental science|Limnology
    Subject code 580
    Language ENG
    Publishing date 2009-01-01 00:00:01.0
    Publisher University of Maryland, College Park
    Publishing country us
    Document type Thesis ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Rising sea levels will reduce extreme temperature variations in tide-dominated reef habitats.

    Lowe, Ryan Joseph / Pivan, Xavier / Falter, James / Symonds, Graham / Gruber, Renee

    Science advances

    2016  Volume 2, Issue 8, Page(s) e1600825

    Abstract: Temperatures within shallow reefs often differ substantially from those in the surrounding ocean; therefore, predicting future patterns of thermal stresses and bleaching at the scale of reefs depends on accurately predicting reef heat budgets. We present ...

    Abstract Temperatures within shallow reefs often differ substantially from those in the surrounding ocean; therefore, predicting future patterns of thermal stresses and bleaching at the scale of reefs depends on accurately predicting reef heat budgets. We present a new framework for quantifying how tidal and solar heating cycles interact with reef morphology to control diurnal temperature extremes within shallow, tidally forced reefs. Using data from northwestern Australia, we construct a heat budget model to investigate how frequency differences between the dominant lunar semidiurnal tide and diurnal solar cycle drive ~15-day modulations in diurnal temperature extremes. The model is extended to show how reefs with tidal amplitudes comparable to their depth, relative to mean sea level, tend to experience the largest temperature extremes globally. As a consequence, we reveal how even a modest sea level rise can substantially reduce temperature extremes within tide-dominated reefs, thereby partially offsetting the local effects of future ocean warming.
    MeSH term(s) Australia ; Climate Change ; Coral Reefs ; Ecosystem ; Seawater ; Sunlight ; Temperature ; Tidal Waves
    Language English
    Publishing date 2016
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.1600825
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  4. Article ; Online: Physiological and morphological responses of the temperate seagrass Zostera muelleri to multiple stressors: investigating the interactive effects of light and temperature.

    York, Paul H / Gruber, Renee K / Hill, Ross / Ralph, Peter J / Booth, David J / Macreadie, Peter I

    PloS one

    2013  Volume 8, Issue 10, Page(s) e76377

    Abstract: Understanding how multiple environmental stressors interact to affect seagrass health (measured as morphological and physiological responses) is important for responding to global declines in seagrass populations. We investigated the interactive effects ... ...

    Abstract Understanding how multiple environmental stressors interact to affect seagrass health (measured as morphological and physiological responses) is important for responding to global declines in seagrass populations. We investigated the interactive effects of temperature stress (24, 27, 30 and 32°C) and shading stress (75, 50, 25 and 0% shade treatments) on the seagrass Zostera muelleri over a 3-month period in laboratory mesocosms. Z. muelleri is widely distributed throughout the temperate and tropical waters of south and east coasts of Australia, and is regarded as a regionally significant species. Optimal growth was observed at 27°C, whereas rapid loss of living shoots and leaf mass occurred at 32°C. We found no difference in the concentration of photosynthetic pigments among temperature treatments by the end of the experiment; however, up-regulation of photoprotective pigments was observed at 30°C. Greater levels of shade resulting in high photochemical efficiencies, while elevated irradiance suppressed effective quantum yield (ΔF/FM'). Chlorophyll fluorescence fast induction curves (FIC) revealed that the J step amplitude was significantly higher in the 0% shade treatment after 8 weeks, indicating a closure of PSII reaction centres, which likely contributed to the decline in ΔF/FM' and photoinhibition under higher irradiance. Effective quantum yield of PSII (ΔF/FM') declined steadily in 32°C treatments, indicating thermal damage. Higher temperatures (30°C) resulted in reduced above-ground biomass ratio and smaller leaves, while reduced light led to a reduction in leaf and shoot density, above-ground biomass ratio, shoot biomass and an increase in leaf senescence. Surprisingly, light and temperature had few interactive effects on seagrass health, even though these two stressors had strong effects on seagrass health when tested in isolation. In summary, these results demonstrate that populations of Z. muelleri in south-eastern Australia are sensitive to small chronic temperature increases and light decreases that are predicted under future climate change scenarios.
    MeSH term(s) Biomass ; Light ; New South Wales ; Phenotype ; Photosynthesis/physiology ; Photosystem II Protein Complex ; Pigmentation ; Stress, Physiological ; Temperature ; Zosteraceae/physiology
    Chemical Substances Photosystem II Protein Complex
    Language English
    Publishing date 2013-10-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0076377
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book ; Online: A global database of dissolved organic matter (DOM) concentration measurements in coastal waters (CoastDOM v1)

    Lønborg, Christian / Carreira, Cátia / Abril, Gwenaël / Agustí, Susana / Amaral, Valentina / Andersson, Agneta / Arístegui, Javier / Bhadury, Punyasloke / Bif, Mariana B. / Borges, Alberto V. / Bouillon, Steven / Calleja, Maria Ll. / Cotovicz Jr., Luiz C. / Cozzi, Stefano / Doval, Maryló / Duarte, Carlos M. / Eyre, Bradley / Fichot, Cédric G. / García-Martín, E. Elena /
    Garzon-Garcia, Alexandra / Giani, Michele / Gonçalves-Araujo, Rafael / Gruber, Renee / Hansell, Dennis A. / Hashihama, Fuminori / He, Ding / Holding, Johnna M. / Hunter, William R. / Ibánhez, J. Severino P. / Ibello, Valeria / Jiang, Shan / Kim, Guebuem / Klun, Katja / Kowalczuk, Piotr / Kubo, Atsushi / Lee, Choon-Weng / Lopes, Cláudia B. / Maggioni, Federica / Magni, Paolo / Marrase, Celia / Martin, Patrick / McCallister, S. Leigh / McCallum, Roisin / Medeiros, Patricia M. / Morán, Xosé Anxelu G. / Muller-Karger, Frank E. / Myers-Pigg, Allison / Norli, Marit / Oakes, Joanne M. / Osterholz, Helena / Park, Hyekyung / Lund Paulsen, Maria / Rosentreter, Judith A. / Ross, Jeff D. / Rueda-Roa, Digna / Santinelli, Chiara / Shen, Yuan / Teira, Eva / Tinta, Tinkara / Uher, Guenther / Wakita, Masahide / Ward, Nicholas / Watanabe, Kenta / Xin, Yu / Yamashita, Youhei / Yang, Liyang / Yeo, Jacob / Yuan, Huamao / Zheng, Qiang / Álvarez-Salgado, Xosé Antón

    eISSN: 1866-3516

    2024  

    Abstract: Measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) concentrations are used to characterize the dissolved organic matter (DOM) pool and are important components of biogeochemical cycling in the coastal ocean. Here, we ... ...

    Abstract Measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) concentrations are used to characterize the dissolved organic matter (DOM) pool and are important components of biogeochemical cycling in the coastal ocean. Here, we present the first edition of a global database (CoastDOM v1; available at https://doi.org/10.1594/PANGAEA.964012 , Lønborg et al., 2023) compiling previously published and unpublished measurements of DOC, DON, and DOP in coastal waters. These data are complemented by hydrographic data such as temperature and salinity and, to the extent possible, other biogeochemical variables (e.g. chlorophyll a , inorganic nutrients) and the inorganic carbon system (e.g. dissolved inorganic carbon and total alkalinity). Overall, CoastDOM v1 includes observations of concentrations from all continents. However, most data were collected in the Northern Hemisphere, with a clear gap in DOM measurements from the Southern Hemisphere. The data included were collected from 1978 to 2022 and consist of 62 338 data points for DOC, 20 356 for DON, and 13 533 for DOP. The number of measurements decreases progressively in the sequence DOC > DON > DOP, reflecting both differences in the maturity of the analytical methods and the greater focus on carbon cycling by the aquatic science community. The global database shows that the average DOC concentration in coastal waters (average ± standard deviation (SD): 182±314 µmol C L −1

    median: 103 µmol C L −1 ) is 13-fold higher than the average coastal DON concentration ( 13.6±30.4 µmol N L −1

    median: 8.0 µmol N L −1 ), which is itself 39-fold higher than the average coastal DOP concentration ( 0.34±1.11 µmol P L −1

    median: 0.18 µmol P L −1 ). This dataset will be useful for identifying global spatial and temporal patterns in DOM and will help facilitate the reuse of DOC, DON, and DOP data in studies aimed at better characterizing local biogeochemical processes; closing nutrient budgets; estimating carbon, nitrogen, and phosphorous ...
    Subject code 333
    Language English
    Publishing date 2024-02-27
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Book ; Online: A global database of dissolved organic matter (DOM) measurements in coastal waters (CoastDOM v1)

    Lønborg, Christian / Carreira, Cátia / Abril, Gwenaël / Agustí, Susana / Amaral, Valentina / Andersson, Agneta / Arístegui, Javier / Bhadury, Punyasloke / Bernardi Bif, Mariana / Borges, Alberto V. / Bouillon, Steven / Ll. Calleja, Maria / Cotovicz Jr., Luiz C. / Cozzi, Stefano / Doval, Maryló / Duarte, Carlos M. / Eyre, Bradley / Fichot, Cédric G. / García-Martín, E. Elena /
    Garzon-Garcia, Alexandra / Giani, Michele / Gonçalves-Araujo, Rafael / Gruber, Renee / A. Hansell, Dennis / Hashihama, Fuminori / He, Ding / Holding, Johnna M. / Hunter, William R. / Ibánhez, J. Severino P. / Ibello, Valeria / Jiang, Shan / Kim, Guebuem / Klun, Katja / Kowalczuk, Piotr / Kubo, Atsushi / Weng Lee, Choon / Lopes, Cláudia B. / Maggioni, Federica / Magni, Paolo / Marrase, Celia / Martin, Patrick / McCallister, S. Leigh / McCallum, Roisin / Medeiros, Patricia M. / Morán, Xosé Anxelu G. / Muller-Karger, Frank / Myers-Pigg, Allison / Norli, Marit / Oakes, Joanne M. / Osterholz, Helena / Park, Hyekyung / Lund Paulsen, Maria / Rosentreter, Judith A. / Rueda-Roa, Digna / Santinelli, Chiara / Shen, Yuan / Teira, Eva / Tinta, Tinkara / Uher, Guenther / Wakita, Masahide / Ward, Nicholas / Watanabe, Kenta / Xin, Yu / Yamashita, Youhei / Yang, Liyang / Yeo, Jacob / Yuan, Huamao / Zheng, Qiang / Álvarez-Salgado, Xosé Antón

    eISSN: 1866-3516

    2023  

    Abstract: The measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) are used to characterize the dissolved organic matter (DOM) pool and are important components of biogeochemical cycling in the coastal ocean. Here, we present the ... ...

    Abstract The measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) are used to characterize the dissolved organic matter (DOM) pool and are important components of biogeochemical cycling in the coastal ocean. Here, we present the first edition of a global database (CoastDOM v1; available at https://figshare.com/s/512289eb43c4f8e8eaef ) compiling previously published and unpublished measurements of DOC, DON, and DOP collected in coastal waters. These data are complemented by hydrographic data such as temperature and salinity and, to the extent possible, other biogeochemical variables (e.g., Chlorophyll- a , inorganic nutrients) and the inorganic carbon system (e.g., dissolved inorganic carbon and total alkalinity). Overall, CoastDOM v1 includes observations from all continents however, most data were collected in the Northern Hemisphere, with a clear gap in coastal water DOM measurements from the Southern Hemisphere. The data included were collected from 1978 to 2022 and consist of 62339 data points for DOC, 20360 for DON and 13440 for DOP. The number of measurements decreases progressively in the sequence DOC > DON > DOP, reflecting both differences in the maturity of the analytical methods and the greater focus on carbon cycling by the aquatic science community. The global database shows that the average DOC concentration in coastal waters (average (standard deviation; SD): 182 (314) µmol C L −1

    median: 103 µmol C L −1 ), is 13-fold greater than the average coastal DON concentrations (average (SD): 13.6 (30.4) µmol N L −1

    median: 8.0 µmol N L −1 ), which was itself 39-fold greater than the average coastal DOP concentrations (average (SD): 0.34 ± 1.11 µmol P L −1

    median: 0.18 µmol P L −1 ). This dataset will be useful to identify global spatial and temporal patterns in DOM and to facilitate reuse of DOC, DON and DOP data in studies aimed at better characterising local biogeochemical processes, closing nutrient budgets, estimating carbon, nitrogen and phosphorous pools, as well ...
    Subject code 333
    Language English
    Publishing date 2023-09-27
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    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.

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