Essays about: "food webs"

Showing result 6 - 10 of 31 essays containing the words food webs.

  1. 6. Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes.

    University essay from

    Author : Juan Manuel de la Quintana; [2020]
    Keywords : Lake; zooplankton; phytoplankton; DOC and DIN:TP.;

    Abstract :     Zooplankton is crucial for lake ecosystems as it is an important component in most of the food webs of these ecosystems. However, environmental changes have caused reductions in ecosystems nutrients and stoichiometry, which directly affects phytoplankton’s development and quality. READ MORE

  2. 7. Spatial and temporal variations in stable isotope signatures (δ13C and δ15N) of the gammarids and the common carp in the southern coast of the Caspian Sea

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Nazila Hajizadeh Koupayeh; [2020]
    Keywords : carbon stable isotope; Caspian sea; Cyprinus carpio; food webs; Gammarus aequicauda; nitrogen stable isotope; Pontogammarus maeoticus;

    Abstract : Despite the growing body of research on the use of stable isotope analysis in food web studies, spatial and temporal variations in stable isotope ratios of coastal communities are still poorly understood. The aim of my study is to explore how carbon and nitrogen stable isotopes of selected benthic communities vary spatially and temporally across the south of Caspian Sea. READ MORE

  3. 8. Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes.

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Juan Manuel de la Quintana; [2020]
    Keywords : Lake; zooplankton; phytoplankton; DOC and DIN:TP.;

    Abstract :     Zooplankton is crucial for lake ecosystems as it is an important component in most of the food webs of these ecosystems. However, environmental changes have caused reductions in ecosystems nutrients and stoichiometry, which directly affects phytoplankton’s development and quality. READ MORE

  4. 9. Invasive species in Weddell Sea : Effects on food web structure

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Inger-Marie Wohlfarth; [2020]
    Keywords : Centrality; Climate change; Food webs; Google PageRank; Invasive species; Structure; Weddell Sea;

    Abstract : The cold water of Antarctica has a unique endemic fauna, where durophagous predators are rare or absent. Due to climate change the water is heating up and the predators have begun to return to the Southern Ocean, which could bring a lot of changes to the food web. There is a high risk it will lead to losses in the unique marine fauna of Antarctica. READ MORE

  5. 10. Importance of fish community structure, nutrients and browning for shallow lake ecosystem dynamics : A modelling perspective

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Ylva Karlberg; [2019]
    Keywords : biological modelling; bowning; food webs; trophic interactions; top-down and bottom-up control; nutrients; light; shallow lake; biologisk modellering; brunifiering; födovävar; trofiska interaktioner; näring; ljus; grund sjö;

    Abstract : In a changing climate, it is increasingly important to be able to model environmental effects on food webs, and to do that, one must have appropriate dynamic models. I present a shallow lake ecosystem model where producers, grazers, carnivores, piscivores, and detritivores are coupled through resource (light, nutrients and detritus) fluxes between the benthic and pelagic habitats and through carnivore life history events (ontogenetic habitat and diet shifts). READ MORE