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Showing 1 to 20 of 243 for “"food web"”.

  1. Microbial food web interactions in two Long Island embayments

    Boissonneault Cellineri, Katie RoseMassachusetts Institute of Technology and Woods Hole Oceanographic Institution1999

    Phytoplankton mortality (herbivory) and bacterivory were examined experimentally in West Neck Bay and Coecles Harbor, Long Island, NY from April through September, 1998. Small algae (<5 μm diameter) dominated phytoplankton communities in both ecosystems throughout the summer, and zooplankton were …

    woods-hole Repository record

  2. The influence of spatiotemporal variation in food web models

    Heuvel, Cecilia EUniversity of Windsor2023

    … and prey availability. Consequently, aquatic food webs are dynamic, and relationships between species are perpetually changing as organisms and primary producer communities adapt to current environmental conditions both in time and space. Despite this knowledge however, many food web studies …

    windsor Repository record

  3. Interaction strengths and net effects in food web models

    Palmer, CatherineUniversity College Cork2014

    … interaction strengths in a three species food chain and a series of theoretical analyses on the changes to equilibrium biomass abundances following press perturbations. The empirical experiment is a consequence of the difficulties faced when parameterising the intraspecific interaction …

    cork Repository record

  4. Microbial food web interactions in two Long Island embayments

    Boissonneault, Katie Rose, 1973-Massachusetts Institute of Technology1999

    Phytoplankton mortality (herbivory) and bacterivory were examined experimentally in West Neck Bay and Coecles Harbor, Long Island, NY from April through September, 1998. Small algae (<5 [tm diameter) dominated phytoplankton communities in both ecosystems throughout the summer, and zooplankton were …

    mit Repository record

  5. Effects of an herbicide on a planktonic food web

    Jenkins, David G.Virginia Polytechnic Institute and State University1986

    … on autotrophic cells, largely as a function of food size, and may have been more closely associated with the detrital food chain than the autotrophic food chain.

    vt Repository record

  6. Food web regulation under different forcing regimes in shallow lakes

    Lischke, BettyUniversität Potsdam

    … the different groups of organisms form the food web of an ecosystem, with the autotrophic and bacterial production at the basis and potentially several levels of consumers on top of the producers. Feeding interactions can regulate communities either by severe grazing pressure or by shortage …

    potsdam-diss Repository record

  7. Causes and Consequences of a Collapsing Food Web in Lake huron

    Ryder, MarkUniversity of Windsor2013

    … confirms that the collapse of the Lake Huron food web is related to both a decrease in primary production, as well as declines in trophic efficiency.

    windsor Repository record

  8. Effects of water color on food web structure in freshwater lakes

    Wissel, BjoernBiological Sciences2022

    … of water color, fish, and Chaoborus on the food web structure under controlled conditions, and (2) analyzed the food webs of two lakes that were similar in morphology and fish assemblage, but strongly differed in water color. Regression and canonical correspondence analysis confirmed my …

    lsu-thes Repository record

  9. The importance of interaction strength for food web dynamics and ecosystem functioning

    O'Gorman, Eoin J.University College Cork2009

    … describe these complex interactions in detailed food webs, which encompass all the interactions in a community. This has led to recent calls for an integration of BEF research with the comprehensive study of food web properties and patterns, to help elucidate the mechanisms that allow complex …

    cork Repository record

  10. Influence of physical habitat management strategies on sportfish and food-web processes

    Gates, Eric JohnUniversity of Illinois at Urbana-Champaign2021

    … of habitat management strategies on reservoir food-webs, and the ability of habitat management strategies to meet objectives, remains unclear. We conducted a series of replicated pond experiments using plastic fish attractors (Artificial) and coarse woody habitat (CWH) to test hypotheses …

    uiuc Repository record

  11. The intertidal and shallow subtidal food web of sub-antarctic Marion Island

    Blankley, William OliverDepartment of Biological Sciences1982

    The sub-Antarctic Prince Edward Island group, consisting of Marion Island and Prince Edward Island (Fig. 1), was annexed by South Africa in 1947-1948 and subsequently declared a nature reserve. Isolated oceanic islands have always presented interesting opportunities for biological research on both …

    cape-town Repository record

  12. Agricultural intensification, biological pest control and spatio-temporal changes in food web structure

    Gagic, Vesna2012

    Die Intensivierung der Landwirtschaft ist einer der Hauptauslöser von Verlusten in der Agrarbiodiversität und damit verbundenen Ökosystemfunktionen wie der biologischen Kontrolle. Sie beeinflusst dadurch indirekt auch die landwirtschaftliche Produktionsleistung. Durch die Intensivierung der …

    goettingen Repository record

  13. Ecophysiology and Food Web Dynamics of Spring Ecotone Communities in the Edwards Aquifer, USA

    Nair, ParvathiTexas State University2019

    Spring orifices serve as ecotones between groundwater and surface water habitats. It is thought that organisms living in physicochemically stable spring ecotones should exhibit small tolerance ranges; however, previous experiments examining this prediction are equivocal. I examined this hypothesis …

    texas-state Repository record

  14. Modelling the Baltic Sea food web with a Dynamic Bayesian Network with hidden variables

    Uusitalo, LauraHelsingfors universitet2017

    … Three versions of a DBN of the Gotland Basin food web are fitted to data, to evaluate the role of different setup of hidden variables. The hidden variables were able to find similar patterns and links to observed variables in the time series regardless of their exact setup. The models …

    helsinki Repository record

  15. Modeling and analysis of a three-species food web with facilitated and intraguild predation

    Castro, Joshua

    … have recently received attention in ecological food webs. Mechanistic models have improved our understanding of these complex food web interactions. Here, focus is given to a three-species food web system with a beach dune natural community in mind. In the last decade, there has been a series of …

    ucf

  16. Stable Isotopes As Intrinsic Markers of Contaminant Dynamics in the Lake Winnipeg Food Web

    Ofukany, AmyUniversity of Saskatchewan2012

    … and the data were used to reconstruct the lake’s food web. The effects of trophic position (TP; δ15N), food source (δ13C and δ34S) and organism size on concentrations of aluminum (Al), arsenic (As), cadmium (Cd), copper (Cu), iron (Fe), manganese (Mn), Hg and selenium (Se) in muscle were examined …

    sask Repository record

  17. AMPHIPODS ARE STRONG INTERACTORS IN THE FOOD WEB OF A BROWN-WATER SALMON RIVER

    Thompson, Audrey Marie

    … the organisms and structures of the freshwater foodweb. In brown water rivers of Western Kamchatka, the foodweb is dominated by ubiquitous benthic amphipods (Anisogammarus kygi) that consume salmon carcass material. We hypothesized that A. kygi are a strong interactor in the feedback loop which …

    montana-tech Repository record

  18. AMPHIPODS ARE STRONG INTERACTORS IN THE FOOD WEB OF A BROWN-WATER SALMON RIVER

    Thompson, Audrey Marie

    … the organisms and structures of the freshwater foodweb. In brown water rivers of Western Kamchatka, the foodweb is dominated by ubiquitous benthic amphipods (Anisogammarus kygi) that consume salmon carcass material. We hypothesized that A. kygi are a strong interactor in the feedback loop which …

    montana Repository record

  19. Carbon flow and food web structure in the mesopelagic zone of the North Atlantic Ocean

    Gardner, KaylaMassachusetts Institute of Technology and Woods Hole Oceanographic Institution2025

    … the euphotic zone and the deep ocean through food web interactions and carbon flow pathways. In this dissertation, I use carbon compound-specific stable carbon isotope analysis of amino acids (CSIA-AA) and DNA gut metabarcoding methodologies to provide a broad ecological outlook on mesopelagic …

    woods-hole Repository record

  20. Introduced Sport Fish and Fish Conservation in a Novel Food Web: Evidence of Predatory Impact

    Landom, Kevin Lee

    utahstate Repository record

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