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Artykuły w czasopismach na temat „Trophic spectra”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Gascuel, Didier, Yves-Marie Bozec, Emmanuel Chassot, Audrey Colomb, and Martial Laurans. "The trophic spectrum: theory and application as an ecosystem indicator." ICES Journal of Marine Science 62, no. 3 (2005): 443–52. http://dx.doi.org/10.1016/j.icesjms.2004.12.013.

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Abstract Trophic spectra represent the distribution of biomass, abundance, or catch by trophic level, and may be used as indicators of the trophic structure and functioning of aquatic ecosystems in a fisheries context. As a theoretical background, we present a simple ecosystem model of biomass flow reflecting predation and ontogenetic processes. Biomass trophic spectrum of total biomass can be modelled as the result of three major factors and processes: trophic efficiency, transfer kinetics, and extent of top-down control. In the simulations, changes in the spectrum highlight fishing impacts o

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2

Libralato, Simone, and Cosimo Solidoro. "Comparing methods for building trophic spectra of ecological data." ICES Journal of Marine Science 67, no. 3 (2009): 426–34. http://dx.doi.org/10.1093/icesjms/fsp249.

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Abstract Libralato, S., and Solidoro, C. 2010. Comparing methods for building trophic spectra of ecological data. – ICES Journal of Marine Science, 67: 426–434. The distribution of biomass, production, and catches over trophic levels (TLs) of the foodweb has been shown theoretically and empirically to provide powerful insights into ecosystem functioning and the effects of fishing. One approach for building trophic spectra of ecological data is based on smoothing original data and assuming zeroes when no values are available for a TL (smoothing-based method). An alternative method is proposed,

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3

Setiawan, F., D. Jiang, R. Hamzah, and B. Matsushita. "Inland Water Trophic State Identification using Remote Sensing data and Machine Learning Approach." IOP Conference Series: Earth and Environmental Science 1062, no. 1 (2022): 012033. http://dx.doi.org/10.1088/1755-1315/1062/1/012033.

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Abstract Providing information on inland waters’ trophic state levels (oligotrophic, mesotrophic, eutrophic, and hypereutrophic) is considered more effective in communicating the lake’s conditions to the public and policymakers than water quality. It is highly demanding for a straightforward method to estimate inland waters’ trophic state. This study proposes a model for estimating the lake trophic state levels from remote sensing data. We used simulation data to overcome data limitations in building the classification model. The simulation data consists of one nanometer (nm) interval spectra,

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4

Boudreau, P. R., and L. M. Dickie. "Biomass Spectra of Aquatic Ecosystems in Relation to Fisheries Yield." Canadian Journal of Fisheries and Aquatic Sciences 49, no. 8 (1992): 1528–38. http://dx.doi.org/10.1139/f92-169.

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The biomass density of aquatic ecosystems can be expressed as an allometric function of organism body size. The log–log plot of this relation, termed the biomass spectrum, is used to compare aquatic ecosystems in various parts of the world. We develop a standardized presentation for several example environments where detailed data on biomass density by body size in the trophic positions, phytoplankton, zooplankton, benthos, and fish, make it possible to establish overall or primary spectral slopes. The basic methodology is adapted for application to other ecosystems where less detailed data ar

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5

Xu, Junwei, Jie Yin, Binduo Xu, et al. "The Effect of Ontogenetic Dietary Shifts on the Trophic Structure of Fish Communities Based on the Trophic Spectrum." Fishes 10, no. 5 (2025): 231. https://doi.org/10.3390/fishes10050231.

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The trophic spectrum provides a useful method to investigate the trophic structure of fish communities. However, ontogenetic shifts in diet can cause variations in the trophic level with body size, thereby influencing the trophic structure of fish communities. In this study, we investigated the effect of ontogenetic dietary shifts on the trophic structure of fish communities in Haizhou Bay based on trophic spectra and trophic indicators calculated under different scenarios of functional group classification. The results showed that the size threshold of ontogenetic dietary shifts was a viable

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6

Smolskaya, V. S., H. A. Zhukava, and B. V. Adamovich. "Spectral characteristics of the autotrophic component of suspended matter in the lakes of the National Park “Narochansky”." Doklady of the National Academy of Sciences of Belarus 63, no. 3 (2019): 325–30. http://dx.doi.org/10.29235/1561-8323-2019-63-3-325-330.

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The studies on 32 lakes of the National Park “Narochansky” were aimed both at studying quantitative and qualitative characteristics of the autotrophic component of plankton and at finding their correlation with the data of spectral analysis of pigment composition. On the basis of the chlorophyll content in the summer season (July–August), the main part of the sampled lakes can be attributed to the mesotrophic type, 2 lakes – oligotrophic, 10 – eutrophic. The content of chlorophyll-ɑ in the lakes ranged from 0.3 to 55.2 μg/l, seston – from 0.3 to 29.8 mg/l. Pigment indices, reflecting the state

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7

Cózar, Andrés, Carlos M. García, José A. Gálvez, and Fidel Echevarría. "Structuring pelagic trophic networks from the biomass size spectra." Ecological Modelling 215, no. 4 (2008): 314–24. http://dx.doi.org/10.1016/j.ecolmodel.2008.02.038.

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GJONI, VOJSAVA, STAMATIS GHINIS, MAURIZIO PINNA, et al. "Patterns of functional diversity of macroinvertebrates across three aquatic ecosystem types, NE Mediterranean." Mediterranean Marine Science 20, no. 4 (2019): 703. http://dx.doi.org/10.12681/mms.19314.

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This study is focused on investigating the variation patterns of macroinvertebrate guilds functional structure, in relation to the taxonomic one, across aquatic ecosystem types along the salinity gradient from freshwater to marine and the resulting implications on guild organization and energy flows. Synoptic samplings have been carried out using the leaf-pack technique at 30 sites of the aquatic ecosystems of the Corfu Island (Greece), including freshwater, lagoon, and marine sites. Here, we analyzed the macroinvertebrate guilds of river, lagoon, and marine ecosystems, as: i. taxonomic compos

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9

Cózar, Andrés, Carlos M. García, and José A. Gálvez. "Analysis of plankton size spectra irregularities in two subtropical shallow lakes (Esteros del Iberá, Argentina)." Canadian Journal of Fisheries and Aquatic Sciences 60, no. 4 (2003): 411–20. http://dx.doi.org/10.1139/f03-037.

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Biomass irregularities in the plankton size spectra of two subtropical shallow lakes have been quantified assuming the classical observed generalities of the size spectra. During a seasonal cycle, three main functional size ranges determined the allocation of the spectra irregularities: microbial food web, nanoplanktonmicroplankton autotrophs, and herbivorous organisms. The structural adjustments within these trophic positions responded to the internal competition between functional guilds, mainly as the result of size-based characteristics related to the ability to eat and the susceptibility

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10

Харченко and Nikolay Kharchenko. "Trophic characteristics of burrowing animals of different ecological groups in the conditions of the central forest steppe." Forestry Engineering Journal 4, no. 3 (2014): 107–16. http://dx.doi.org/10.12737/6275.

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Allocation to food spectra of burrowing ani-mals of different ecological groups has its own specifics that reflect their biotopical distribu-tion. Burrowing mammals of the region is cha-racterized by a combination of different types of plant and animal feeds. Heterophagous and omnivorous in a region of anthropogenic land-scapes is in progress. Burrowing animals, with permanent and long-lasting relationship with burrow (geoaerobionts and geobionts) trophic relations maintain the high level of stability and clear trophic specialization (zoophages or herbivores).

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11

Couret, María, José M. Landeira, Víctor M. Tuset, Airam N. Sarmiento-Lezcano, Pedro Vélez-Belchí, and Santiago Hernández-León. "Mesozooplankton size structure in the Canary Current System." Marine Environmental Research 188 (June 1, 2023): 105976. https://doi.org/10.1016/j.marenvres.2023.105976.

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Changes in plankton composition influences the dynamics of marine food webs and carbon sinking rates. Understanding the core structure and function of the plankton distribution is of paramount importance to know their role in trophic transfer and efficiency. Here, we studied the zooplankton distribution, abundance, composition, and size spectra for the characterization of the community under different oceanographic conditions in the Canaries-African Transition Zone (C-ATZ). This region is a transition zone between the coastal upwelling and the open ocean showing a high variability because of t

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12

Sosa-López, Atahualpa, David Mouillot, Thang Do Chi, and Julia Ramos-Miranda. "Ecological indicators based on fish biomass distribution along trophic levels: an application to the Terminos coastal lagoon, Mexico." ICES Journal of Marine Science 62, no. 3 (2005): 453–58. http://dx.doi.org/10.1016/j.icesjms.2004.12.004.

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Abstract Cumulative relative biomass trophic level spectra (BTLS) are constructed for the fish community of a tropical coastal lagoon in Mexico to analyse spatio-temporal patterns as a potential ecosystem indicator of multifactor impacts. Data were based on monthly trawl surveys over a single year carried out eighteen years apart. The spectra show significant differences between the two periods, indicating major shifts in the trophic structure of the system. Specifically, biomass of the omnivorous, estuarine species in the middle of the foodweb (originally dominating) has been replaced by carn

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13

García-Oliva, Ovidio, Florian M. Hantzsche, Maarten Boersma, and Kai W. Wirtz. "Phytoplankton and particle size spectra indicate intense mixotrophic dinoflagellates grazing from summer to winter." Journal of Plankton Research 44, no. 2 (2022): 224–40. http://dx.doi.org/10.1093/plankt/fbac013.

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Abstract Mixotrophic dinoflagellates (MTD) are a diverse group of organisms often responsible for the formation of harmful algal blooms. However, the development of dinoflagellate blooms and their effects on the plankton community are still not well explored. Here we relate the species succession of MTD with parallel changes of phytoplankton size spectra during periods of MTD dominance. We used FlowCAM analysis to acquire size spectra in the range 2–200 μm every one or two weeks from July to December 2007 at Helgoland Roads (Southern North Sea). Most size spectra of dinoflagellates were bimoda

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14

Krumsick, KJ, and JAD Fisher. "Community size spectra provide indicators of ecosystem recovery on the Newfoundland and Labrador shelf." Marine Ecology Progress Series 635 (February 6, 2020): 123–37. http://dx.doi.org/10.3354/meps13212.

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Species- and size-selective overexploitation often have ecosystem-wide impacts that are evident in community size spectra. To both derive potential ecosystem targets for community rebuilding and assess contemporary indicators relative to these targets, we constructed theoretical size spectra to predict pristine biomass densities using a combination of species- and size-specific nitrogen stable isotope signatures and a range of trophic efficiencies and primary productivity estimates within and among 3 sub-regions of the Newfoundland and Labrador shelf. Theoretical size spectra were compared to

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15

Han, Bo‐Ping, and Milan Straskraba. "Reanalysis of Models and an Improved Model of Biomass Size Spectra." International Review of Hydrobiology 84, no. 3 (1999): 207–31. http://dx.doi.org/10.1002/iroh.199900022.

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AbstractOur reanalysis aimed at understanding the regularity in empirical biomass size spectra (BSS) suggests that the construction of BSS depends of the size interval and size scales used and different definitions of BSS in literature are therefore very different.Existing empirical models of BSS can be fitted perfectly to the observed data, but the biological basis of the fitted parameters is not explained and comparison and interpretation of the findings is therefore difficult. Parameters of mechanistic models of BSS have a biological background and are interpretable. Discrete mechanistic mo

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16

Sprules, W. Gary. "Effects of trophic interactions on the shape of pelagic size spectra." SIL Proceedings, 1922-2010 23, no. 1 (1988): 234–40. http://dx.doi.org/10.1080/03680770.1987.11897932.

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Arizmendi-Rodríguez, Dana I., J. López-Martínez, and E. Herrera-Valdivia. "Feeding habits ofEucinostomus entomelasandMicropogonias megalopsin Las Guasimas lagoon Gulf of California." Journal of the Marine Biological Association of the United Kingdom 94, no. 8 (2014): 1721–29. http://dx.doi.org/10.1017/s0025315414000198.

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The trophic spectrum of bothEucinostomus entomelasandMicropogonias megalops, the two most abundant fish species in Laguna Las Guásimas, Sonora, México is described in our study. A total of 21 types of prey were identified belonging to seven taxonomic groups (Crustacea, Mollusca, Annelida, Rhodophyta, Copepoda, Echinodermata and Chordata) to analyse the feeding spectra and diet breadth. The preferred prey items ofEucinostomus entomelas(Dark-spot mojarra) were Polichaeta (index of relative importance = 46.7%), followed by bivalves(36.6%), andLuidia columbia (5.6%), while those ofMicropogonias me

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Barton, AD, F. González Taboada, A. Atkinson, CE Widdicombe, and CA Stock. "Integration of temporal environmental variation by the marine plankton community." Marine Ecology Progress Series 647 (August 13, 2020): 1–16. http://dx.doi.org/10.3354/meps13432.

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Theory and observations suggest that low frequency variation in marine plankton populations, or red noise, may arise through cumulative integration of white noise atmospheric forcing by the ocean and its amplification within food webs. Here, we revisit evidence for the integration of stochastic atmospheric variations by comparing the power spectra of time series of atmospheric and oceanographic conditions to the population dynamics of 150 plankton taxa at Station L4 in the Western English Channel. The power spectra of oceanographic conditions (sea surface temperature, surface nitrate) are redd

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19

Novruzov, N.E. "Comparison of trophic spectra and hunting strategies of some large arachnids (Arachnida: Scorpiones, Solifugae, Aranei) in semi-desert biocenoses of Gobustan (Eastern Azerbaijan)." Caucasian Entomological Bulletin 13, no. 2 (2017): 135–44. https://doi.org/10.23885/1814-3326-2017-13-2-135-144.

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Novruzov, N.E. (2017): Comparison of trophic spectra and hunting strategies of some large arachnids (Arachnida: Scorpiones, Solifugae, Aranei) in semi-desert biocenoses of Gobustan (Eastern Azerbaijan). Caucasian Entomological Bulletin 13 (2): 135-144, DOI: 10.23885/1814-3326-2017-13-2-135-144, URL: http://dx.doi.org/10.23885/1814-3326-2017-13-2-135-144

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Carozza, David Anthony, Daniele Bianchi, and Eric Douglas Galbraith. "The ecological module of BOATS-1.0: a bioenergetically constrained model of marine upper trophic levels suitable for studies of fisheries and ocean biogeochemistry." Geoscientific Model Development 9, no. 4 (2016): 1545–65. http://dx.doi.org/10.5194/gmd-9-1545-2016.

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Abstract. Environmental change and the exploitation of marine resources have had profound impacts on marine communities, with potential implications for ocean biogeochemistry and food security. In order to study such global-scale problems, it is helpful to have computationally efficient numerical models that predict the first-order features of fish biomass production as a function of the environment, based on empirical and mechanistic understandings of marine ecosystems. Here we describe the ecological module of the BiOeconomic mArine Trophic Size-spectrum (BOATS) model, which takes an Earth-s

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Carozza, D. A., D. Bianchi, and E. D. Galbraith. "The ecological module of BOATS-1.0: a bioenergetically-constrained model of marine upper trophic levels suitable for studies of fisheries and ocean biogeochemistry." Geoscientific Model Development Discussions 8, no. 12 (2015): 10145–97. http://dx.doi.org/10.5194/gmdd-8-10145-2015.

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Abstract. Environmental change and the exploitation of marine resources have had profound impacts on marine communities, with potential implications for ocean biogeochemistry and food security. In order to study such global-scale problems, it is helpful to have computationally efficient numerical models that predict the first-order features of fish biomass production as a function of the environment, based on empirical and mechanistic understandings of marine ecosystems. Here we describe the ecological module of the BiOeconomic mArine Trophic Size-spectrum (BOATS) model, which takes an Earth-s

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Richter, Ian A., Henrique C. Giacomini, Derrick T. De Kerckhove, Nicholas E. Jones, and Donald A. Jackson. "Assessing spatial scale effects on stream fish size spectra." Canadian Journal of Fisheries and Aquatic Sciences 82 (January 1, 2025): 1–14. https://doi.org/10.1139/cjfas-2024-0179.

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Biomass size spectra are useful tools for ecologists to investigate macroecological processes such as trophic energy transfer and productivity. However, little is known about how different methods of aggregating data across spatial scales of river networks may affect community size spectra results. We used size-binned data (0–2048 g) of fish assemblages from three Lake Ontario watersheds to compare fish size spectra slopes across multiple stream classification systems and the effects of sampling design on size spectra at broader spatial scales. The slope of individual site-based size spectra r

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Dischereit, Annkathrin, Owen S. Wangensteen, Kim Præbel, Holger Auel, and Charlotte Havermans. "Using DNA Metabarcoding to Characterize the Prey Spectrum of Two Co-Occurring Themisto Amphipods in the Rapidly Changing Atlantic-Arctic Gateway Fram Strait." Genes 13, no. 11 (2022): 2035. http://dx.doi.org/10.3390/genes13112035.

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The two congeneric hyperiids Themisto libellula and T. abyssorum provide an important trophic link between lower and higher trophic levels in the rapidly changing Arctic marine ecosystem. These amphipods are characterized by distinct hydrographic affinities and are hence anticipated to be impacted differently by environmental changes, with major consequences for the Arctic food web. In this study, we applied DNA metabarcoding to the stomach contents of these Themisto species, to comprehensively reveal their prey spectra at an unprecedented-high-taxonomic-resolution and assess the regional vari

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Howarth, Leigh M., Paul J. Somerfield, Julia L. Blanchard, James J. Waggitt, Susan Allender, and Jan G. Hiddink. "The effects of trawling and primary production on size-structured food webs in seabed ecosystems." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 10 (2020): 1659–65. http://dx.doi.org/10.1139/cjfas-2020-0025.

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Understanding how different drivers shape relationships between abundance and body mass (size spectra) is important for understanding trophic and competitive interactions in food webs and for predicting the effects of human pressures. Here, we sample seabed communities from small polychaetes (<0.001 g) to large fish (>1 kg) in the Celtic Sea and the western English Channel to examine how bottom trawling and primary production affect their size spectra and to compare these with predictions from a model that couples predator and detritivore communities. Size spectra were not well approxima

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Umanskaya, M. V., S. V. Bykova, and N. G. Tarasova. "Unicellular Plankton Size Structure (Size-Taxonomic and Size-Trophic Spectra) in a Hypertrophic Urban Lake." Известия Российской академии наук. Серия биологическая, no. 2 (March 1, 2023): 198–210. http://dx.doi.org/10.31857/s102634702270010x.

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The results of an analysis of the size spectra of unicellular plankton (bacteria, algae, ciliates) in the hypertrophic freshwater urban lake (L. Bolshoe Vasilyevskoe, Togliatti, Russia) are presented. Two types of size spectra have been identified in the seasonal cycle. Strong nanoplanctonic maximum formed mainly by phototrophic cyanobacteria and Chlorophyta was found during the period of open water (spring to autumn); picoplankton maximum/maxima (mainly heterotrophic bacteria) and increased proportion of microplankton (heterotrophic and mixotrophic ciliates)–in the ice period. The peculiarity

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Morin, Antoine, Nathalie Bourassa, and Antonella Cattaneo. "Use of size spectra and empirical models to evaluate trophic relationships in streams." Limnology and Oceanography 46, no. 4 (2001): 935–40. http://dx.doi.org/10.4319/lo.2001.46.4.0935.

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Zhou, Meng, Kurt S. Tande, Yiwu Zhu, and Sünnje Basedow. "Productivity, trophic levels and size spectra of zooplankton in northern Norwegian shelf regions." Deep Sea Research Part II: Topical Studies in Oceanography 56, no. 21-22 (2009): 1934–44. http://dx.doi.org/10.1016/j.dsr2.2008.11.018.

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Markou, Giorgos, Alexandros Diamantis, Evagelina Korozi, Vasiliki Tsagou, Io Kefalogianni, and Iordanis Chatzipavlidis. "Effects of Monochromatic Illumination with LEDs Lights on the Growth and Photosynthetic Performance of Auxenochlorella protothecoides in Photo- and Mixotrophic Conditions." Plants 10, no. 4 (2021): 799. http://dx.doi.org/10.3390/plants10040799.

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This study examined the effects of monochromatic illumination (blue, red, green and yellow) employing light-emitting diodes (LEDs), trophic conditions (photoautotrophic and mixotrophic), and nitrogen availability (high and low peptone concentration) on the growth and biochemical composition of Auxenochlorella protothecoides. The results revealed that mixotrophic conditions did not favor A. protothecoides, giving lower growth rates compared to heterotrophy (dark conditions). However, mixotrophy gave significantly higher growth rates compared to photoautotrophy. The best light wavelengths for mi

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Tripp, Madison, Jasmina Wiemann, Jochen Brocks, Paul Mayer, Lorenz Schwark, and Kliti Grice. "Fossil Biomarkers and Biosignatures Preserved in Coprolites Reveal Carnivorous Diets in the Carboniferous Mazon Creek Ecosystem." Biology 11, no. 9 (2022): 1289. http://dx.doi.org/10.3390/biology11091289.

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The reconstruction of ancient trophic networks is pivotal to our understanding of ecosystem function and change through time. However, inferring dietary relationships in enigmatic ecosystems dominated by organisms without modern analogues, such as the Carboniferous Mazon Creek fauna, has previously been considered challenging: preserved coprolites often do not retain sufficient morphology to identify the dietary composition. Here, we analysed n = 3 Mazon Creek coprolites in concretions for dietary signals in preserved biomarkers, stable carbon isotope data, and macromolecular composition. Chol

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Chen, Yixiang, Shiquan Lin, Chunsheng Wang, Juan Yang, and Dong Sun. "Response of size and trophic structure of zooplankton community to marine environmental conditions in the northern South China Sea in winter." Journal of Plankton Research 42, no. 3 (2020): 378–93. http://dx.doi.org/10.1093/plankt/fbaa022.

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Abstract The South China Sea (SCS) is a semi-enclosed marginal sea. And in the northern SCS (NSCS), the Pearl River plume, mesoscale eddies and Kuroshio intrusion may influence the structure of pelagic ecosystems. Here, based on mesozooplankton samples collected in the NSCS from December 2014 to January 2015, spatial variations of mesozooplankton biomass, abundance, normalized biomass size spectra (NBSS), size structure and trophic structure were analyzed to study the response of mesozooplankton community to the influence of highly variable oceanographic environment. High biomass, abundance an

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Robinson, James P. W., and Julia K. Baum. "Trophic roles determine coral reef fish community size structure." Canadian Journal of Fisheries and Aquatic Sciences 73, no. 4 (2016): 496–505. http://dx.doi.org/10.1139/cjfas-2015-0178.

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Relationships between abundance – body size and trophic position – body size can reveal size structuring in food webs and test ecological theory. Although there is considerable evidence of size structuring in temperate aquatic food webs, little is known about the structure of tropical coral reef food webs. Here, we use underwater visual-census data and nitrogen stable isotope analysis to test if coral reef fish communities (i) are size structured and (ii) follow metabolic scaling rules. After examining individuals from over 160 species spanning four orders of magnitude in body size, we show th

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Kallio, Kari. "Optical properties of Finnish lakes estimated with simple bio-optical models and water quality monitoring data." Hydrology Research 37, no. 2 (2006): 183–204. http://dx.doi.org/10.2166/nh.2006.0014.

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The aim of this study was to estimate the distributions of spectral diffuse attenuation coefficient, attenuation depth and subsurface reflectance of Finnish lakes. In addition, the optimum empirical water quality interpretation algorithms employing reflectance ratios were investigated for the needs of remote sensing. Estimations of the optical properties were based on simple optical models and measured concentrations of optically active substances (the sum of chlorophyll a and phaeophytin a, total suspended solids and coloured dissolved organic matter (CDOM)) at 1670 monitoring stations repres

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Vandromme, P., E. Nogueira, M. Huret, et al. "Spring-time zooplankton size structure over the continental shelf of the Bay of Biscay." Ocean Science Discussions 10, no. 6 (2013): 2207–54. http://dx.doi.org/10.5194/osd-10-2207-2013.

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Abstract. Linking lower to higher trophic levels requires a special focus on the pivotal role played by mid-trophic levels, i.e. the zooplankton. One of the most relevant information on zooplankton in term of fluxes of matter lies in its size structure. We present here an extensive dataset of size measurements covering part of the western European shelf and slope, from the Galician coast to the Ushant front, during springs from 2005 to 2012. Zooplankton size spectra were estimated using both measurements carried out in situ by the Laser-Optical Plankton Counter (LOPC, 816 records) and WP2 net

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Quiroga, E., D. Gerdes, A. Montiel, R. Knust, and U. Jacob. "Normalized biomass size spectra in high Antarctic macrobenthic communities: linking trophic position and body size." Marine Ecology Progress Series 506 (June 23, 2014): 99–113. http://dx.doi.org/10.3354/meps10807.

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Fry, B., and RB Quinones. "Biomass spectra and stable isotope indicators of trophic level in zooplankton of the northwest Atlantic." Marine Ecology Progress Series 112 (1994): 201–4. http://dx.doi.org/10.3354/meps112201.

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Li, Sijia, Shiqi Xu, Kaishan Song, et al. "Remote quantification of the trophic status of Chinese lakes." Hydrology and Earth System Sciences 27, no. 19 (2023): 3581–99. http://dx.doi.org/10.5194/hess-27-3581-2023.

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Abstract. Assessing eutrophication in lakes is of key importance, as this parameter constitutes a major aquatic ecosystem integrity indicator. The trophic state index (TSI), which is widely used to quantify eutrophication, is a universal paradigm in the scientific literature. In this study, a methodological framework is proposed for quantifying and mapping TSI using the Sentinel Multispectral Imager sensor and fieldwork samples. The first step of the methodology involves the implementation of stepwise multiple regression analysis of the available TSI dataset to find some band ratios, such as b

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Vandromme, P., E. Nogueira, M. Huret, et al. "Springtime zooplankton size structure over the continental shelf of the Bay of Biscay." Ocean Science 10, no. 5 (2014): 821–35. http://dx.doi.org/10.5194/os-10-821-2014.

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Abstract. Linking lower and higher trophic levels requires special focus on the essential role played by mid-trophic levels, i.e., the zooplankton. One of the most relevant pieces of information regarding zooplankton in terms of flux of energy lies in its size structure. In this study, an extensive data set of size measurements is presented, covering parts of the western European continental shelf and slope, from the Galician coast to the Ushant front, during the springs from 2005 to 2012. Zooplankton size spectra were estimated using measurements carried out in situ with the Laser Optical Pla

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Kwong, LE, KD Suchy, AR Sastri, JF Dower, and EA Pakhomov. "Comparison of mesozooplankton production estimates from Saanich Inlet (British Columbia, Canada) using the chitobiase and biomass size spectra approaches." Marine Ecology Progress Series 655 (November 26, 2020): 59–75. http://dx.doi.org/10.3354/meps13533.

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Zooplankton production estimates are necessary to understand the availability and transfer of energy to higher trophic levels in marine food webs. Methods have been developed to quantify zooplankton production; however, they are difficult to compare as they focus on single species, groups, stages, or size classes of zooplankton. We compared 2 methods for estimating crustacean production: the chitobiase method (based on a crustacean moulting enzyme), and 3 empirical growth rate models (Huntley-Lopez, Hirst-Lampitt, and Hirst-Bunker) applied to optically resolved mesozooplankton normalized bioma

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Das, Biplob, Rolf D. Vinebrooke, Arturo Sanchez-Azofeifa, Benoit Rivard, and Alexander P. Wolfe. "Inferring sedimentary chlorophyll concentrations with reflectance spectroscopy: a novel approach to reconstructing historical changes in the trophic status of mountain lakes." Canadian Journal of Fisheries and Aquatic Sciences 62, no. 5 (2005): 1067–78. http://dx.doi.org/10.1139/f05-016.

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Reflectance spectroscopy has made it possible to rapidly and nondestructively assess the chlorophyll content of plants and natural waters. However, to date this approach has not been applied to chlorophyll and chlorophyll derivatives preserved in lake sediments. Here, we explore the relationships between visible-near-infrared spectral properties of lake sediments and measured pigment concentrations for lakes that have been exposed recently to anthropogenic nitrogen deposition. Down-core decreases in pigment concentrations and changes in reflectance properties effectively chronicle increases in

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Tokranov, A. M. "Feeding patterns of the plain sculpin Myoxocephalus jaok (Cuvier, 1829) (Cottidae) and its position in the trophic system of near-Kamchatka waters." Marine Biological Journal 3, no. 3 (2018): 43–56. http://dx.doi.org/10.21072/mbj.2018.03.3.05.

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Feeding patterns of the plain sculpin Myoxocephalus jaok in near-Kamchatka waters of the Sea of Okhotsk, the Bering Sea and Pacific Ocean are considered using materials collected during 1978–2008. This species of Cottidae is characterized by wide feeding spectra (over 100 nutritive objects); nonetheless, fishes (on average 64.1 %) and Decapoda (32.2 %) have the highest significance in its diet. The fishes include flatfish Pleuronectidae (24.3 % of food mass), Alaska pollock Theragra chalcogramma (14.4 %), Pacific sand lance Ammodytes hexapterus (9.5 %), and sculpins Cottidae (5.6 %). Decapoda

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ALMEIDA, PRYSCILLA DENISE, Eduardo Antonio Morales, Carlos Eduardo Wetzel, Luc Ector, and Denise De Campos Bicudo. "Two new diatoms in the genus Fragilaria Lyngbye (Fragilariophyceae) from tropical reservoirs in Brazil and comparison with type material of F. tenera." Phytotaxa 246, no. 3 (2016): 163. http://dx.doi.org/10.11646/phytotaxa.246.3.1.

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Two new diatom species, Fragilaria neotropica sp. nov. and F. spectra sp. nov., from six reservoirs with different trophic status in the Alto Tietê River Basin, São Paulo, Brazil, are described. Descriptions are based on light (LM) and scanning electron microscopy (SEM) data revealing that both taxa have distinctive features that separate them from each other and from other taxa currently in Fragilaria. Fragilaria neotropica has high stria density, broader (sometimes deformed) central area, and capitate (often deflected) apices. This species was found in high abundance as part of the phytoplan

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Giacomini, Henrique C., Brian J. Shuter, and Julia K. Baum. "Size-based approaches to aquatic ecosystems and fisheries science: a symposium in honour of Rob Peters." Canadian Journal of Fisheries and Aquatic Sciences 73, no. 4 (2016): 471–76. http://dx.doi.org/10.1139/cjfas-2016-0100.

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This special issue honours Rob Peters’ outstanding contributions to the field of aquatic ecology. It focuses on the size spectrum approach — in which individual organisms, rather than species, are the most basic biological unit — and highlights applications of this approach to fisheries management. The 21 papers in this issue cover three subject areas: (i) the use of size spectra to characterize variation in community structure, (ii) the development of size-based models of ecosystem dynamics to address fisheries questions, and (iii) applications of size-based theory to examine the consequences

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Hushtan, K. "Features of biotopic differentiation of ecomorphs spectra of amphibiotic insects (Insecta: Ephemeroptera, Plecoptera, Odonata) communities in hydroecosystems of Ukrainian Carpathians." Proceedings of the State Natural History Museum, no. 35 (December 8, 2019): 59–66. http://dx.doi.org/10.36885/nzdpm.2019.35.59-66.

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The peculiarities of biotope differentiation of amphibiotic insects ecomorphs spectra (Insecta: Ephemeroptera, Plecoptera, Odonata) in hydroecosystems of Ukrainian Carpathians are established. Among Ephemeroptera ecomorphs, the dominant species (in the number of species) were: subclass ploskotili velykoziabrovi zbyrachi-ziskobliuvachi ta khyzhaky; subclass siflonuroidni dribno ziabrovi zbyrachi-ziskobliuvachi. For epirytral, the dominant ecomorphs among the freckles are kryptobionty shchilyn briofily (35%); for metarytral – fitofilni kryptobionty podribniuvachi (61%); litofilni kryptobionty, y

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Gießler, Sabine, Tido Strauss, Katrin Schachtl, Thomas Jankowski, Ramona Klotz, and Herwig Stibor. "Trophic Positions of Polyp and Medusa Stages of the Freshwater Jellyfish Craspedacusta sowerbii Based on Stable Isotope Analysis." Biology 12, no. 6 (2023): 814. http://dx.doi.org/10.3390/biology12060814.

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When species spread into new regions, competition with native species and predatory–prey relationships play a major role in whether the new species can successfully establish itself in the recipient food web and become invasive. In aquatic habitats, species with a metagenetic life cycle, such as the freshwater jellyfish Craspedacusta with benthic polyps and planktonic medusae, have to meet the requirements of two distinct life stages occurring in two habitats with different food webs. Here, we examined the trophic position of both life stages, known to be predatory, and compared their niches w

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Semenova, E. A., L. K. Dubovitskaya, V. K. Gins, and M. S. Gins. "Activity and Electrophoretic Spectra of Enzymes in Soy Leaves Affected by the Pathogens of Various Trophic Groups." Russian Agricultural Sciences 44, no. 3 (2018): 216–20. http://dx.doi.org/10.3103/s1068367418030138.

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Sheremet’ev, I. S., S. B. Rozenfel’d, and T. P. Sipko. "Meta-Analysis of the Large Herbivores’ Trophic Spectra in Northern Asia Concerning Changes of Dominant Primary Consumers." Arid Ecosystems 9, no. 3 (2019): 166–73. http://dx.doi.org/10.1134/s2079096119030119.

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Tarling, G. A., G. Stowasser, P. Ward, et al. "Seasonal trophic structure of the Scotia Sea pelagic ecosystem considered through biomass spectra and stable isotope analysis." Deep Sea Research Part II: Topical Studies in Oceanography 59-60 (January 2012): 222–36. http://dx.doi.org/10.1016/j.dsr2.2011.07.002.

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Mehner, Thomas, Betty Lischke, Kristin Scharnweber, et al. "Empirical correspondence between trophic transfer efficiency in freshwater food webs and the slope of their size spectra." Ecology 99, no. 6 (2018): 1463–72. http://dx.doi.org/10.1002/ecy.2347.

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Umanskaya, M. V., S. V. Bykova, and N. G. Tarasova. "The Size Structure of Unicellular Plankton (Size–Taxonomic and Size–Trophic Spectra) in a Hypertrophic Urban Lake." Biology Bulletin 50, no. 2 (2023): 203–14. http://dx.doi.org/10.1134/s1062359022700145.

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Mukhin, V. A., H. Knudsen, P. Corfixen, E. V. Zhuykova, I. O. Nepryakhin, and D. K. Diyarova. "The genus <i>Trichaptum</i> in North Asia." Микология и фитопатология 57, no. 4 (2023): 255–66. http://dx.doi.org/10.31857/s0026364823040074.

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It is shown that in North Asia (Urals, Siberia, Far East) the genus Trichaptum is represented by four widespread sympatric species (Trichaptum abietinum, T. biforme, T. fuscoviolaceum, T. laricinum) and T. quercinum found in the Far East. The geographic range of T. fuscoviolaceum, T. abietinum, T. biforme cover the whole of North Asia, whereas T. laricinum is absent in the Far East. The revealed sympatric nature of species is based on their predominant use of wood various coniferous (T. fuscoviolaceum, T. abietinum, T. laricinum) and deciduous (T. biforme) tree species. The widest trophic nich

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