Sökning: "shallow lakes"

Visar resultat 1 - 5 av 39 avhandlingar innehållade orden shallow lakes.

  1. 1. Effects of warming and browning on benthic and pelagic ecosystem components in shallow lakes

    Författare :Francisco Rivera Vasconcelos; Sebastian Diehl; Jan Karlsson; Christopher T. Solomon; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; benthic; pelagic; algae; consumers; browning; warming; shallow lakes; food web; dissolved organic matter;

    Sammanfattning : The majority of lakes on Earth are shallow, unproductive and located at high latitudes. These lakes are experiencing big changes due to climate change, where two environmental drivers operate simultaneously, browning and warming. How they affect lake ecosystems is not well understood. LÄS MER

  3. 2. Spring dynamics in shallow lakes: the role of plankton, fish and macrophytes in a changing climate

    Författare :Alice Nicolle; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zooplankton; spring; 0 fish; macrophytes; phenology; climate change; shallow lakes;

    Sammanfattning : Shallow lakes such as Lake Krankesjön are characterized by their extended littoral zones, usually covered by submersed and emergent vegetation. In paper 1, I investigated the relationship between turbidity and macrophyte growth (Chara spp. LÄS MER

  4. 3. Greenhouse Gas Dynamics in Ice-covered Lakes Across Spatial and Temporal Scales

    Författare :Blaize Amber Denfeld; Gesa Weyhenmeyer; Kimberly Wickland; Uppsala universitet; []
    Nyckelord :carbon cycle; climate change; cryosphere; carbon dioxide; methane; lakes; winter limnology; methane oxidation; nutrients; catchment; Limnologi; Limnology;

    Sammanfattning : Lakes play a major role in the global carbon (C) cycle, despite making up a small area of earth’s surface. Lakes receive, transport and process sizable amounts of C, emitting a substantial amount of the greenhouse gases, carbon dioxide (CO2) and methane (CH4), into the atmosphere. LÄS MER

  5. 4. The palaeolimnological record of regime shifts in lakes in response to climate change

    Författare :Linda Randsalu Wendrup; Kvartärgeologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; palaeolimnology; regime shifts; thresholds; alternative stable states; climate change; ecosystem dynamics; diatoms; hydrocarbons; monitoring; lake sediments; shallow lakes; 8.2 ka event;

    Sammanfattning : Regime shifts in lake ecosystems can occur in response to both abrupt and continuous climate change, and the imprints they leave in palaeolimnological records allow us to investigate and better understand patterns and processes governing ecological changes on geological time scales. This thesis aims at investigating palaeolimnological records of regime shifts in lakes during the Holocene to explore how lake ecosystems responded to climate changes and anthropogenic activities and to identify thresholds or tipping points that produced regime shifts. LÄS MER

  7. 5. Phosphorus retention in sediments : implications for aerobic phosphorus release in shallow lakes

    Författare :Stefan Löfgren; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER