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Journal articles on the topic 'Lower Trophic Level (LTL) Model'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Beecham, J. A., J. Bruggeman, J. Aldridge, and S. Mackinson. "An approach for coupling higher and lower levels in marine ecosystem models and its application to the North Sea." Geoscientific Model Development Discussions 8, no. 7 (2015): 5577–618. http://dx.doi.org/10.5194/gmdd-8-5577-2015.

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Abstract. End to end modelling is an attractive and rapidly developing approach to solve developing strategies in marine systems science and management. However problems remain in the area of data matching and sub-model compatibility. A mechanism and novel interfacing system (Couplerlib) is presented whereby a physical/biogeochemical model (GOTM-ERSEM) that predicts dynamics of the lower trophic level (LTL) organisms in marine ecosystems is coupled to a dynamic ecosystem model (Ecosim) that predicts food-web interactions among higher trophic level (HTL) organisms. Coupling is achieved by means

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Beecham, Jonathan, Jorn Bruggeman, John Aldridge, and Steven Mackinson. "<i>Couplerlib</i>: a metadata-driven library for the integration of multiple models of higher and lower trophic level marine systems with inexact functional group matching." Geoscientific Model Development 9, no. 3 (2016): 947–64. http://dx.doi.org/10.5194/gmd-9-947-2016.

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Abstract. End-to-end modelling is a rapidly developing strategy for modelling in marine systems science and management. However, problems remain in the area of data matching and sub-model compatibility. A mechanism and novel interfacing system (Couplerlib) is presented whereby a physical–biogeochemical model (General Ocean Turbulence Model–European Regional Seas Ecosystem Model, GOTM–ERSEM) that predicts dynamics of the lower trophic level (LTL) organisms in marine ecosystems is coupled to a dynamic ecosystem model (Ecosim), which predicts food-web interactions among higher trophic level (HTL)

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Pshenichnikova, Tatyana V., Svetlana E. Ushakova, and Michail V. Alexandrov. "The Importance of Insulin Resistance Assessing as the Effectiveness Predictor in Rehabilitation and Observation of Patients after Acute Myocardial Infarction." Bulletin of Rehabilitation Medicine 20, no. 3 (2021): 59–66. http://dx.doi.org/10.38025/2078-1962-2021-20-3-59-66.

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One of the goals for the management of patients after acute myocardial infarction is to achieve and maintain the optimal level of lowdensitylipoproteins (LDL), which is a factor that determines the prognosis in patients with coronary heart disease. A relevant objectiveis to extract from a number of trophic indicators that indicate disturbance in the adipose tissue distribution and functioning and thatincrease the risk of repeated cardiovascular disasters, the predictors of the low-density lipoprotein targets achieving effectivenessduring rehabilitation and subsequent dispensary follow-up of pa

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Reed, Jodie, Lynne Shannon, Laure Velez, et al. "Ecosystem indicators—accounting for variability in species’ trophic levels." ICES Journal of Marine Science 74, no. 1 (2016): 158–69. http://dx.doi.org/10.1093/icesjms/fsw150.

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Trophic level (TL)-based indicators are commonly used to track the ecosystem effects of fishing as the selective removal of organisms from the food web may result in changes to the trophic structure of marine ecosystems. The use of a fixed TL per species in the calculation of TL-based indicators has been questioned, given that species’ TLs vary with ontogeny, as well as over time and space. We conducted a model-based assessment of the performance of fixed TL-based indicators vs. variable TL-based indicators for tracking the effects of fishing pressure. This assessment considered three TL-based

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Yanagi, Tetuo, and Goh Onizuka. "Numerical Model on the Lower Trophic Level Ecosystem in Hakata Bay." Oceanography in Japan 8, no. 4 (1999): 245–51. http://dx.doi.org/10.5928/kaiyou.8.245.

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Kearney, Kelly, Albert Hermann, Wei Cheng, Ivonne Ortiz, and Kerim Aydin. "A coupled pelagic–benthic–sympagic biogeochemical model for the Bering Sea: documentation and validation of the BESTNPZ model (v2019.08.23) within a high-resolution regional ocean model." Geoscientific Model Development 13, no. 2 (2020): 597–650. http://dx.doi.org/10.5194/gmd-13-597-2020.

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Abstract. The Bering Sea is a highly productive ecosystem, supporting a variety of fish, seabird, and marine mammal populations, as well as large commercial fisheries. Due to its unique shelf geometry and the presence of seasonal sea ice, the processes controlling productivity in the Bering Sea ecosystem span the pelagic water column, the benthic sea floor, and the sympagic sea ice environments. The Bering Ecosystem Study Nutrient-Phytoplankton-Zooplankton (BESTNPZ) model has been developed to simulate the lower-trophic-level processes throughout this region. Here, we present a version of this

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Yoshie, Naoki, Yasuhiro Yamanaka, Kenneth A. Rose, David L. Eslinger, Daniel M. Ware, and Michio J. Kishi. "Parameter sensitivity study of the NEMURO lower trophic level marine ecosystem model." Ecological Modelling 202, no. 1-2 (2007): 26–37. http://dx.doi.org/10.1016/j.ecolmodel.2006.07.043.

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Zuenko, Yury I. "Application of a lower trophic level model to a coastal sea ecosystem." Ecological Modelling 202, no. 1-2 (2007): 132–43. http://dx.doi.org/10.1016/j.ecolmodel.2006.07.044.

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Kishi, Michio J., Makoto Kashiwai, Daniel M. Ware, et al. "NEMURO—a lower trophic level model for the North Pacific marine ecosystem." Ecological Modelling 202, no. 1-2 (2007): 12–25. http://dx.doi.org/10.1016/j.ecolmodel.2006.08.021.

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Alleway, Heidi K., Sean D. Connell, Tim M. Ward, and Bronwyn M. Gillanders. "Historical changes in mean trophic level of southern Australian fisheries." Marine and Freshwater Research 65, no. 10 (2014): 884. http://dx.doi.org/10.1071/mf13246.

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Decreases in the mean trophic level (MTL) of fishery catches have been used to infer reductions in the abundance of high trophic level species caused by fishing pressure. Previous assessments of southern Australian fisheries have been inconclusive. The objectives of the present study were to provide more accurate estimates of MTL using disaggregated taxonomic and spatial data. We applied the model of MTL to fisheries catch statistics for the state of South Australia from 1951 to 2010 and a novel set of historical market data from 1936 to 1946. Results show that from 1951 to 2010, MTL declined

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Allmon, Warren D., Douglas H. Erwin, Robert M. Linsley, and Paul J. Morris. "Trophic level & evolution in Paleozoic gastropods." Paleontological Society Special Publications 6 (1992): 3. http://dx.doi.org/10.1017/s2475262200005633.

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Although trophic position or level is one of the most basic aspects of a benthic marine species' ecology, its evolutionary significance remains obscure. Gastropods offer a suitable model for examining the relationship between trophic level and evolution since they exhibit a wide variety of trophic strategies and their mode of life is often reflected in their shell form. We examined 196 genera of Paleozoic gastropods (≈ 1/3 of known genera) for which first appearance and last appearance could be specified to stage level and for which trophic strategy could be inferred with a reasonable degree o

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Meyer, Elisabeth I., and Rainer Poepperl. "Assessing food-web structure, matter fluxes, and system attributes of a Central European mountain stream by performing mass-balanced network analysis." Canadian Journal of Fisheries and Aquatic Sciences 61, no. 9 (2004): 1565–81. http://dx.doi.org/10.1139/f04-104.

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Trophic interactions and cycling of matter within the community in a soft-water mountain stream were analyzed on the basis of a compartment food-web model. The model describes (i) the structure of the food web, quantifying biomass, production, and consumption of individual elements as well as of the entire system, and (ii) the flow of matter between compartments as well as trophic levels. Detritus and primary producers sustain a broad variety of invertebrate consumers. Fishes are the top predators; sculpin (Cottus gobio) and a compartment consisting of brown trout (Salmo trutta) and rainbow tr

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Wang, Yuheng, Hao Wei, and Michio J. Kishi. "Coupling of an individual-based model of anchovy with lower trophic level and hydrodynamic models." Journal of Ocean University of China 12, no. 1 (2013): 45–52. http://dx.doi.org/10.1007/s11802-013-1901-x.

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Hoppe, Monika I., Carlo Meloro, Mark S. Edwards, Daryl Codron, Marcus Clauss, and María J. Duque-Correa. "Less need for differentiation? Intestinal length of reptiles as compared to mammals." PLOS ONE 16, no. 7 (2021): e0253182. http://dx.doi.org/10.1371/journal.pone.0253182.

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Although relationships between intestinal morphology between trophic groups in reptiles are widely assumed and represent a cornerstone of ecomorphological narratives, few comparative approaches actually tested this hypothesis on a larger scale. We collected data on lengths of intestinal sections of 205 reptile species for which either body mass (BM), snout-vent-length (SVL) or carapax length (CL) was recorded, transforming SVL or CL into BM if the latter was not given, and analyzed scaling patterns with BM and SVL, accounting for phylogeny, comparing three trophic guilds (faunivores, omnivores

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Duque-Correa, María J., Daryl Codron, Carlo Meloro, et al. "Mammalian intestinal allometry, phylogeny, trophic level and climate." Proceedings of the Royal Society B: Biological Sciences 288, no. 1944 (2021): 20202888. http://dx.doi.org/10.1098/rspb.2020.2888.

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An often-stated ecomorphological assumption that has the status of ‘textbook knowledge’ is that the dimensions of the digestive tract correlate with diet, where herbivores—consuming diets of lower digestibility—have longer intestinal tracts than faunivores—consuming diets of higher digestibility. However, statistical approaches have so far failed to demonstrate this link. Here, we collated data on the length of intestinal sections and body mass of 519 mammal species, and test for various relationships with trophic, climatic and other biological characteristics. All models showed a strong phylo

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van Leeuwen, SM, H. Salgado, JL Bailey, et al. "Climate change, marine resources and a small Chilean community: making the connections." Marine Ecology Progress Series 680 (December 9, 2021): 223–46. http://dx.doi.org/10.3354/meps13934.

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Climate change is affecting large-scale oceanic processes. How and when these changes will impact those reliant on marine resources is not yet clear. Here we use end-to-end modeling to track the impacts of expected changes through the marine ecosystem on a specific, small community: Cochamó, in the Gulf of Ancud wider area, Chile. This area is important for Chilean fisheries and aquaculture, with Cochamó reliant on both lower and upper trophic level marine resources. We applied the GOTM-ERSEM-BFM coupled hydro-biogeochemical water-column model to gauge lower-trophic level marine ecological com

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GKANASOS, ATHANASIOS, EUDOXIA SCHISMENOU, KOSTAS TSIARAS, et al. "A three dimensional, full life cycle, anchovy and sardine model for the North Aegean Sea (Eastern Mediterranean): Validation, sensitivity and climatic scenario simulations." Mediterranean Marine Science 22, no. 3 (2021): 653. http://dx.doi.org/10.12681/mms.27407.

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We present the development of a 3D full-lifecycle, individual-based model (IBM) for anchovy and sardine, online coupled to an existing hydrodynamic/biogeochemical low-trophic level (LTL) model for the North Aegean Sea. It was built upon an existing 1D model for the same species and area, with the addition of a horizontal movement scheme. In the model, both species evolve from the embryonic stage (egg+yolk sac larva) to the larval, juvenile, and adult stages. Somatic growth is simulated with the use of a “Wisconsin” type bioenergetics model and fish populations with an adaptation of the ‘super

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Lehodey, Patrick, Raghu Murtugudde, and Inna Senina. "Bridging the gap from ocean models to population dynamics of large marine predators: A model of mid-trophic functional groups." Progress In Oceanography 84, no. 1-2 (2010): 69–84. https://doi.org/10.1016/j.pocean.2009.09.008.

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The modeling of mid-trophic organisms of the pelagic ecosystem is a critical step in linking the coupled physical–biogeochemical models to population dynamics of large pelagic predators. Here, we provide an example of a modeling approach with definitions of several pelagic mid-trophic functional groups. This application includes six different groups characterized by their vertical behavior, i.e., occurrence of diel migration between epipelagic, mesopelagic and bathypelagic layers. Parameterization of the dynamics of these components is based on a temperature-linked time development relationshi

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Xiao, Yongjin, and Marjorie A. M. Friedrichs. "The assimilation of satellite-derived data into a one-dimensional lower trophic level marine ecosystem model." Journal of Geophysical Research: Oceans 119, no. 4 (2014): 2691–712. http://dx.doi.org/10.1002/2013jc009433.

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20

Politikos, Dimitris V., George Triantafyllou, George Petihakis, et al. "Application of a bioenergetics growth model for European anchovy (Engraulis encrasicolus) linked with a lower trophic level ecosystem model." Hydrobiologia 670, no. 1 (2011): 141–63. http://dx.doi.org/10.1007/s10750-011-0674-8.

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21

Klink, Saskia, Philipp Giesemann, and Gerhard Gebauer. "Picky carnivorous plants? Investigating preferences for preys’ trophic levels – a stable isotope natural abundance approach with two terrestrial and two aquatic Lentibulariaceae tested in Central Europe." Annals of Botany 123, no. 7 (2019): 1167–77. http://dx.doi.org/10.1093/aob/mcz022.

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Abstract Background and Aims Stable isotope two-source linear mixing models are frequently used to calculate the nutrient-uptake efficiency of carnivorous plants from pooled prey. This study aimed to separate prey into three trophic levels as pooled prey limits statements about the contribution of a specific trophic level to the nutrition of carnivorous plants. Phytoplankton were used as an autotrophic reference for aquatic plants as the lack of suitable reference plants impedes calculation of their efficiency. Methods Terrestrial (Pinguicula) and aquatic (Utricularia) carnivorous plants along

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Schlenger, Adam J., Rodrigo Beas-Luna, and Richard F. Ambrose. "Forecasting ocean acidification impacts on kelp forest ecosystems." PLOS ONE 16, no. 4 (2021): e0236218. http://dx.doi.org/10.1371/journal.pone.0236218.

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Ocean acidification is one the biggest threats to marine ecosystems worldwide, but its ecosystem wide responses are still poorly understood. This study integrates field and experimental data into a mass balance food web model of a temperate coastal ecosystem to determine the impacts of specific OA forcing mechanisms as well as how they interact with one another. Specifically, we forced a food web model of a kelp forest ecosystem near its southern distribution limit in the California large marine ecosystem to a 0.5 pH drop over the course of 50 years. This study utilizes a modeling approach to

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Hacker, Sibylle, Sylvia Loloma Hacker, Magali T. Uono, Carlos Afonso Casagranda, and Marco A. Stephano. "How the management of the trophic cascade determines innovation." International Journal of Innovation Education and Research 7, no. 5 (2019): 113–22. http://dx.doi.org/10.31686/ijier.vol7.iss5.1482.

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Large corporations form transnational corporations that, despite working in different countries with specific legal and cultural requirements, have consolidated global management strategies, seeking to operate with maximum efficiency in different economic scenarios. In recent years, there has been a massive proliferation of international companies, most of them located in wealth and industrialized countries, which controll their foreign affiliates. In the current context of globalization, these companies have great influence on the economy, as they interfere with governments and local business

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Harvey, C. J., T. P. Good, and S. F. Pearson. "Top–down influence of resident and overwintering Bald Eagles (Haliaeetus leucocephalus) in a model marine ecosystem." Canadian Journal of Zoology 90, no. 7 (2012): 903–14. http://dx.doi.org/10.1139/z2012-059.

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Conservation of predators presents challenges when predators affect prey populations that provide ecosystem services. Near Puget Sound, resident and overwintering populations of Bald Eagle ( Haliaeetus leucocephalus (L., 1766)) have expanded in recent decades. We modeled the potential impact of Bald Eagles on marine food-web structure. Bald Eagles caused trophic cascade dynamics through mid-level predators (seabirds) to lower trophic levels (fishes, benthic invertebrates), particularly when seabirds were more abundant in eagle diets. Resident Bald Eagles affected food-web structure more than o

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Mariani, Patrizio, Ken H. Andersen, Martin Lindegren, and Brian R. MacKenzie. "Trophic impact of Atlantic bluefin tuna migrations in the North Sea." ICES Journal of Marine Science 74, no. 6 (2017): 1552–60. http://dx.doi.org/10.1093/icesjms/fsx027.

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AbstractLarge highly migratory predators can have major impacts on local marine ecosystems by reducing prey populations and leading to trophic cascades that affect the entire fish community. These trophic interactions are typically non-linear and can alter both the migratory behaviour of the predator and the stability of the fish community. The impact of a migrating top-predator is investigated here for Atlantic bluefin tuna in the North Sea. Bluefin tuna has been absent from the region for half-century, but recent years have seen recovery of migrations and a return of bluefin tuna in the area

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Rechimont, Maria Emilia, Felipe Amezcua, Jorge Ricardo Ruelas-Inzunza, Roberto Cruz-Garcìa, Juan Roberto Felipe Vallarta-Zárate, and Felipe Amezcua-Linares. "Mercury and Selenium Trophic Transfer in the Mexican California Current Ecosystem Using a Top Predator as a Model." Fishes 10, no. 6 (2025): 275. https://doi.org/10.3390/fishes10060275.

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Research on the trophic transfer of trace elements in food chains, particularly toxic elements like mercury (Hg) and essential elements like selenium (Se), is crucial for understanding their impact on human health. In this work, we assessed the transfer of Hg and Se in the blue shark (Prionace glauca), a top predator with economic importance. Muscle samples from sharks, as well as their main prey (squid, red shrimp, sardine, and mackerel), were analyzed for Hg and Se concentrations. The Hg levels of sharks were below the recommended legal limit for seafood consumption in Mexico (1 µg·g−1 ww),

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Xiao, Y., and M. A. M. Friedrichs. "Using biogeochemical data assimilation to assess the relative skill of multiple ecosystem models in the Mid-Atlantic Bight: effects of increasing the complexity of the planktonic food web." Biogeosciences 11, no. 11 (2014): 3015–30. http://dx.doi.org/10.5194/bg-11-3015-2014.

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Abstract. Now that regional circulation patterns can be reasonably well reproduced by ocean circulation models, significant effort is being directed toward incorporating complex food webs into these models, many of which now routinely include multiple phytoplankton (P) and zooplankton (Z) compartments. This study quantitatively assesses how the number of phytoplankton and zooplankton compartments affects the ability of a lower-trophic-level ecosystem model to reproduce and predict observed patterns in surface chlorophyll and particulate organic carbon. Five ecosystem model variants are impleme

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Xiao, Y., and M. A. M. Friedrichs. "Using biogeochemical data assimilation to assess the relative skill of multiple ecosystem models: effects of increasing the complexity of the planktonic food web." Biogeosciences Discussions 11, no. 1 (2014): 481–520. http://dx.doi.org/10.5194/bgd-11-481-2014.

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Abstract. Now that regional circulation patterns can be reasonably well reproduced by ocean circulation models, significant effort is being directed toward incorporating complex food webs into these models, many of which now routinely include multiple phytoplankton (P) and zooplankton (Z) compartments. This study quantitatively assesses how the number of phytoplankton and zooplankton compartments affects the ability of a lower trophic level ecosystem model to reproduce and predict observed patterns in surface chlorophyll and particulate organic carbon. Five ecosystem model variants are impleme

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Belharet, M., C. Estournel, and S. Charmasson. "Ecosystem model-based approach for modeling the dynamics of <sup>137</sup>Cs transfer to marine plankton populations: application to the western North Pacific Ocean after the Fukushima nuclear power plant accident." Biogeosciences 13, no. 2 (2016): 499–516. http://dx.doi.org/10.5194/bg-13-499-2016.

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Abstract. Huge amounts of radionuclides, especially 137Cs, were released into the western North Pacific Ocean after the Fukushima nuclear power plant (FNPP) accident that occurred on 11 March 2011, resulting in contamination of the marine biota. In this study we developed a radioecological model to estimate 137Cs concentrations in phytoplankton and zooplankton populations representing the lower levels of the pelagic trophic chain. We coupled this model to a lower trophic level ecosystem model and an ocean circulation model to take into account the site-specific environmental conditions in the

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Belharet, M., C. Estournel, and S. Charmasson. "Ecosystem model-based approach for modelling the dynamics of <sup>137</sup>Cs transfer to marine plankton populations: application to the western North Pacific Ocean after the Fukushima nuclear power plant accident." Biogeosciences Discussions 12, no. 12 (2015): 9497–541. http://dx.doi.org/10.5194/bgd-12-9497-2015.

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Abstract. Huge amounts of radionuclides, especially 137Cs, were released into the western North Pacific Ocean after the Fukushima nuclear power plant (FNPP) accident that occurred on 11 March 2011, resulting in contamination of the marine biota. In this study we developed a radioecological model to estimate 137Cs concentrations in phytoplankton and zooplankton populations representing the lower levels of the pelagic trophic chain. We coupled this model to a lower trophic level ecosystem model and an ocean circulation model to take into account the site-specific environmental conditions in the

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Stafford, Richard, Zach Boakes, Alice E. Hall, and Georgia C. A. Jones. "The Role of Predator Removal by Fishing on Ocean Carbon Dynamics." Anthropocene Science 1, no. 1 (2021): 204–10. http://dx.doi.org/10.1007/s44177-021-00005-x.

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AbstractTotal ocean carbon exceeds 40,000 GT either dissolved in the water column or buried in ocean sediments, and the ocean continues to sequester carbon from the atmosphere. Selective removal of predatory fish through extractive fishing alters the community structure of the ocean. This altered community results in increased biomass of more productive, low trophic level fish, higher overall fish respiration rates and lower carbon sequestration rates from fish, despite possible decreases in total fish biomass. High-pressure fishing on high trophic level fish, a globally occurring phenomenon,

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Herman, Petra, Milán Fehér, Áron Molnár, et al. "Iron and Manganese Retention of Juvenile Zebrafish (Danio rerio) Exposed to Contaminated Dietary Zooplankton (Daphnia pulex)—a Model Experiment." Biological Trace Element Research 199, no. 2 (2020): 732–43. http://dx.doi.org/10.1007/s12011-020-02190-z.

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AbstractIn present study the effect of iron (Fe) and manganese (Mn) contamination was assessed by modeling a freshwater food web of water, zooplankton (Daphnia pulex), and zebrafish (Danio rerio) under laboratory conditions. Metals were added to the rearing media of D. pulex, and enriched zooplankton was fed to zebrafish in a feeding trial. The elemental analysis of rearing water, zooplankton, and fish revealed significant difference in the treatments compared to the control. In D. pulex the Mn level increased almost in parallel with the dose of supplementation, as well as the Fe level differe

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Huang, Feng, Wen Zhao, Xingye Qiao, et al. "A Stable Isotope Analysis to Quantify the Contribution of Basal Dietary Sources to Food Webs of Drinking Water Reservoirs." Water 16, no. 22 (2024): 3338. http://dx.doi.org/10.3390/w16223338.

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This study investigates the food web structure of the Xinlicheng Reservoir, a drinking water source of critical importance in Changchun, China, by employing stable isotope analysis (SIA) to quantify the contribution ratios of four basal dietary sources—phytoplankton, zooplankton, sediment organic matter, and particulate organic matter (POM)—to the diets of two key filter-feeding fish species, Hypophthalm ichthys molitrix and Aristichthys nobilis. The analysis reveals that phytoplankton is the dominant dietary source for both species, contributing 32.08% and 34.06%, respectively, whereas the PO

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Stock, C. A., J. P. Dunne, and J. G. John. "Drivers of trophic amplification of ocean productivity trends in a changing climate." Biogeosciences 11, no. 24 (2014): 7125–35. http://dx.doi.org/10.5194/bg-11-7125-2014.

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Abstract. Pronounced projected 21st century trends in regional oceanic net primary production (NPP) raise the prospect of significant redistributions of marine resources. Recent results further suggest that NPP changes may be amplified at higher trophic levels. Here, we elucidate the role of planktonic food web dynamics in driving projected changes in mesozooplankton production (MESOZP) found to be, on average, twice as large as projected changes in NPP by the latter half of the 21st century under a high emissions scenario in the Geophysical Fluid Dynamics Laboratory's ESM2M–COBALT (Carbon, Oc

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Clouzot, Ludiwine, Charlotte Haguenauer, and Peter A. Vanrolleghem. "An Extended Ecosystem Model for Understanding EE2 Indirect Effects on a Freshwater Food Web and its Ecosystem Function Resilience." Water 12, no. 6 (2020): 1736. http://dx.doi.org/10.3390/w12061736.

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Freshwater species are highly impacted by human activities and the consequences on ecosystem functioning are still not well understood. In the literature, a multitrophic perspective appears to be key to advance future biodiversity and ecosystem functioning (BEF) research. This paper aims at studying indirect effects of the synthetic hormone 17α-ethinylestradiol (EE2) on a freshwater food web by creating BEF links, through the interpretation of seasonal cycles and multitrophic interactions. An ecosystem model previously developed using experimental data from a unique whole-ecosystem study on EE

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McGregor, Vidette L., Elizabeth A. Fulton, and Matthew R. Dunn. "Addressing initialisation uncertainty for end-to-end ecosystem models: application to the Chatham Rise Atlantis model." PeerJ 8 (June 3, 2020): e9254. http://dx.doi.org/10.7717/peerj.9254.

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Ecosystem models require the specification of initial conditions, and these initial conditions have some level of uncertainty. It is important to allow for uncertainty when presenting model results, because it reduces the risk of errant or non-representative results. It is crucial that model results are presented as an envelope of what is likely, rather than presenting only one instance. We perturbed the initial conditions of the Chatham Rise Atlantis model and analysed the effect of this uncertainty on the model’s dynamics by comparing the model outputs resulting from many initial condition p

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Schram, JB, HL Sorensen, RD Brodeur, AWE Galloway, and KR Sutherland. "Abundance, distribution, and feeding ecology of Pyrosoma atlanticum in the Northern California Current." Marine Ecology Progress Series 651 (October 1, 2020): 97–110. http://dx.doi.org/10.3354/meps13465.

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During 2016-2018, unprecedented aggregations of the colonial pelagic tunicate Pyrosoma atlanticum were observed in the Northern California Current (NCC). Pyrosomes are common in tropical and sub-tropical ocean waters, but little is known about their abundance, distribution, and trophic ecology in mid-latitude systems. To assess these factors, pyrosomes were collected during cruises in the NCC in May and August 2017. A generalized additive model (GAM) was used to identify relationships between in situ environmental variables (temperature, salinity, fluorescence) and distribution and abundance p

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Ji, Rubao, Changsheng Chen, Peter J. S. Franks, et al. "Spring phytoplankton bloom and associated lower trophic level food web dynamics on Georges Bank: 1-D and 2-D model studies." Deep Sea Research Part II: Topical Studies in Oceanography 53, no. 23-24 (2006): 2656–83. http://dx.doi.org/10.1016/j.dsr2.2006.08.008.

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39

Novella‐Fernandez, Roberto, Carlos Ibañez, Javier Juste, Elizabeth L. Clare, C. Patrick Doncaster, and Orly Razgour. "Trophic resource partitioning drives fine‐scale coexistence in cryptic bat species." Ecology and Evolution 10, no. 24 (2020): 14122–36. https://doi.org/10.5281/zenodo.13443347.

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(Uploaded by Plazi for the Bat Literature Project) Understanding the processes that enable species coexistence has important implications for assessing how ecological systems will respond to global change. Morphology and functional similarity increase the potential for competition, and therefore, cooccurring morphologically similar but genetically unique species are a good model system for testing coexistence mechanisms. We used DNA metabarcoding and highthroughput sequencing to characterize for the first time the trophic ecology of two recently described cryptic bat species with parapatric ra

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40

Novella‐Fernandez, Roberto, Carlos Ibañez, Javier Juste, Elizabeth L. Clare, C. Patrick Doncaster, and Orly Razgour. "Trophic resource partitioning drives fine‐scale coexistence in cryptic bat species." Ecology and Evolution 10, no. 24 (2020): 14122–36. https://doi.org/10.5281/zenodo.13443347.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) Understanding the processes that enable species coexistence has important implications for assessing how ecological systems will respond to global change. Morphology and functional similarity increase the potential for competition, and therefore, cooccurring morphologically similar but genetically unique species are a good model system for testing coexistence mechanisms. We used DNA metabarcoding and highthroughput sequencing to characterize for the first time the trophic ecology of two recently described cryptic bat species with parapatric ra

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41

Novella‐Fernandez, Roberto, Carlos Ibañez, Javier Juste, Elizabeth L. Clare, C. Patrick Doncaster, and Orly Razgour. "Trophic resource partitioning drives fine‐scale coexistence in cryptic bat species." Ecology and Evolution 10, no. 24 (2020): 14122–36. https://doi.org/10.5281/zenodo.13443347.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Understanding the processes that enable species coexistence has important implications for assessing how ecological systems will respond to global change. Morphology and functional similarity increase the potential for competition, and therefore, cooccurring morphologically similar but genetically unique species are a good model system for testing coexistence mechanisms. We used DNA metabarcoding and highthroughput sequencing to characterize for the first time the trophic ecology of two recently described cryptic bat species with parapatric ra

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42

Novella‐Fernandez, Roberto, Carlos Ibañez, Javier Juste, Elizabeth L. Clare, C. Patrick Doncaster, and Orly Razgour. "Trophic resource partitioning drives fine‐scale coexistence in cryptic bat species." Ecology and Evolution 10, no. 24 (2020): 14122–36. https://doi.org/10.5281/zenodo.13443347.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Understanding the processes that enable species coexistence has important implications for assessing how ecological systems will respond to global change. Morphology and functional similarity increase the potential for competition, and therefore, cooccurring morphologically similar but genetically unique species are a good model system for testing coexistence mechanisms. We used DNA metabarcoding and highthroughput sequencing to characterize for the first time the trophic ecology of two recently described cryptic bat species with parapatric ra

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43

Novella‐Fernandez, Roberto, Carlos Ibañez, Javier Juste, Elizabeth L. Clare, C. Patrick Doncaster, and Orly Razgour. "Trophic resource partitioning drives fine‐scale coexistence in cryptic bat species." Ecology and Evolution 10, no. 24 (2020): 14122–36. https://doi.org/10.5281/zenodo.13443347.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Understanding the processes that enable species coexistence has important implications for assessing how ecological systems will respond to global change. Morphology and functional similarity increase the potential for competition, and therefore, cooccurring morphologically similar but genetically unique species are a good model system for testing coexistence mechanisms. We used DNA metabarcoding and highthroughput sequencing to characterize for the first time the trophic ecology of two recently described cryptic bat species with parapatric ra

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44

Christensen, A., M. Butenschön, Z. Gürkan, and I. J. Allen. "Towards an integrated forecasting system for pelagic fisheries." Ocean Science Discussions 9, no. 2 (2012): 1437–79. http://dx.doi.org/10.5194/osd-9-1437-2012.

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Abstract. First results of a coupled modeling and forecasting system for the pelagic fisheries are being presented. The system consists currently of three mathematically fundamentally different model subsystems: POLCOMS-ERSEM providing the physical-biogeochemical environment implemented in the domain of the North-West European shelf and the SPAM model which describes sandeel stocks in the North Sea. The third component, the SLAM model, connects POLCOMS-ERSEM and SPAM by computing the physical-biological interaction. Our major experience by the coupling model subsystems is that well-defined and

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Jargal, Namsrai, Ho-Seong Lee, and Kwang-Guk An. "Long-Term Water Quality Patterns in an Estuarine Reservoir and the Functional Changes in Relations of Trophic State Variables Depending on the Construction of Serial Weirs in Upstream Reaches." International Journal of Environmental Research and Public Health 18, no. 23 (2021): 12568. http://dx.doi.org/10.3390/ijerph182312568.

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Water quality degradation is one of the major problems with artificial lakes in estuaries. Long-term spatiotemporal patterns of water quality in a South Korean estuarine reservoir were analyzed using seasonal datasets from 2002 to 2020, and some functional changes in relations of trophic state variables due to the construction of serial weirs in the upper river were also investigated. A total of 19 water quality parameters were used for the study, including indicators of organic matter, nutrients, suspended solids, water clarity, and fecal pollution. In addition, chlorophyll-a (CHL-a) was used

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Najmudeen, Theparambil Mohamed, Pallangattu Kochukandan Seetha, and Payiyappanal Ulahannan Zacharia. "Stock dynamics of the brushtooth lizardfish Saurida undosquamis (Richardson, 1848) from a tropical multispecies fishery in the southeastern Arabian Sea." Aquatic Living Resources 32 (2019): 9. http://dx.doi.org/10.1051/alr/2019006.

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The brushtooth lizardfish Saurida undosquamis (Richardson, 1848) is a high trophic level benthic predator and is one among the most exploited demersal finfish species from eastern Arabian Sea by Indian trawlers. However, in recent years, the landings of many top predator fishes including S. undosquamis showed a declining trend resulting in a steady decline in the mean trophic levels of the fishes caught commercially in the region. We investigated the growth, mortality and stock dynamics of S. undosquamis harvested by mechanised trawls in the southeastern Arabian Sea, using length-based methods

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di Bagno, Ermellina, Corrado Battisti, Francesco Zullo, and Giovanni Amori. "Applying abundance/biomass comparison curves to small mammals: a weak tool for detect urbanization-related stress in the assemblages?" Folia Oecologica 47, no. 1 (2020): 10–15. http://dx.doi.org/10.2478/foecol-2020-0002.

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AbstractUrbanization is a form of pervasive human-induced disturbance. We tested the effectiveness of Abundance/Biomass Comparisons (ABC) as an approach in detecting stress due to landscape urbanization in large small mammal assemblages obtained from pellets of Barn Owl (Tyto alba; Strigiformes). We compared three assemblages sampled in not urbanized contexts (agro-mosaic landscapes) with three assemblages preyed in highly urbanized contexts. In all assemblages, the role of strictly synanthropic species (in our case: rodents) emerged since almost all of total biomass was assigned to these spec

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Zuanon, Lino A., Ruthe E. O. S. Leão, Adilson Quero, Karen C. Neves, and Heraldo L. Vasconcelos. "Nutrient Supplementation to Arboreal Ants: Effects on Trophic Position, Thermal Tolerance, Community Structure and the Interaction with the Host-Tree." Diversity 15, no. 6 (2023): 786. http://dx.doi.org/10.3390/d15060786.

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Carbohydrates and proteins are essential to maintain the basic functions of animals. Over the course of one year we conducted a factorial experiment to determine the influence of carbohydrate (sucrose) and protein supplementation on the thermal tolerance, trophic position, overall abundance, species richness and composition, and on the strength of the protective effects of arboreal ants on their host tree (Caryocar brasiliense). Using Azteca ants as a model we found evidence of dietary and thermal plasticity among arboreal ants as colonies supplied with protein increased their trophic level re

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Meissa, B., and D. Gascuel. "Overfishing of marine resources: some lessons from the assessment of demersal stocks off Mauritania." ICES Journal of Marine Science 72, no. 2 (2014): 414–27. http://dx.doi.org/10.1093/icesjms/fsu144.

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Abstract The recent, rapid development of fishing in Mauritania offers a good case study for a comparative approach of the resilience of the species exploited there, in the face of increasing fishing pressure. First, we assessed the health of 22 demersal stocks with differing ecological requirements, demographic strategies, and states of exploitation. A dynamic production model was fitted in a framework of Bayesian statistics to abundance indices estimated from scientific trawl surveys or commercial catch per unit efforts. We show that 12 of the 22 stocks assessed are overexploited and 3 are f

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Yool, A., E. E. Popova, A. C. Coward, D. Bernie, and T. R. Anderson. "Climate change and ocean acidification impacts on lower trophic levels and the export of organic carbon to the deep ocean." Biogeosciences 10, no. 9 (2013): 5831–54. http://dx.doi.org/10.5194/bg-10-5831-2013.

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Abstract. Most future projections forecast significant and ongoing climate change during the 21st century, but with the severity of impacts dependent on efforts to restrain or reorganise human activity to limit carbon dioxide (CO2) emissions. A major sink for atmospheric CO2, and a key source of biological resources, the World Ocean is widely anticipated to undergo profound physical and – via ocean acidification – chemical changes as direct and indirect results of these emissions. Given strong biophysical coupling, the marine biota is also expected to experience strong changes in response to t

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