Sökning: "ecosystem shifts"

Visar resultat 1 - 5 av 47 avhandlingar innehållade orden ecosystem shifts.

1. 1. Regime Shifts in the Anthropocene

   Författare :Juan Carlos Rocha; Garry Peterson; Debra Peters; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; regime shifts; critical transitions; ecosystems; drivers; impacts; ecosystem services; Sustainability Science; vetenskap om hållbar utveckling;

   Sammanfattning : Abrupt and persistent reconfiguration of ecosystem’s structure and function has been observed on a wide variety of ecosystems worldwide. While scientist believe that such phenomena could become more common and severe in the near future, little is known about the patterns of regime shifts’ causes and consequences for human well-being. LÄS MER

3. 2. Regime Shifts in the Anthropocene

   Författare :Juan Carlos Rocha; Garry Peterson; Reinette Biggs; Örjan Bodin; Kevin Noone; Sarah Cornell; Ingo Fretzer; Steven Lade; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; regime shifts; critical transitions; network analysis; dynamic tipping points; Sustainability Science; vetenskap om hållbar utveckling; Systems Ecology; systemekologi;

   Sammanfattning : Regime shifts are large, abrupt and often hard to reverse changes in the function and structure of socal-ecological systems. These regime shifts have been documented in a broad range of systems and scales both in marine, terrestrial and polar ecosystems. LÄS MER

4. 3. Arctic Water System Change and its Interactions with Permafrost and Ecosystem Changes

   Författare :Johanna Mård Karlsson; Georgia Destouni; Daqing Yang; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Arctic; climate change; monitoring; ecosystem shifts; hydrology; hydro-climatic change; permafrost; Physical Geography; naturgeografi;

   Sammanfattning : Climate change and various changes in the landscape itself, such as permafrost thaw, may trigger and mediate substantial changes in the inland water system of the Arctic. Many climate change responses in the Arctic landscape and ecosystems are then related to alterations in the hydrological system. 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. Upholding the coral loop : Resilience, alternative stable states and feedbacks in coral reefs

   Författare :Albert Norström; Magnus Nyström; Nancy Knowlton; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; resilience; alternative stable states; regimes; feedbacks; recruitment; coral reefs; marine ecosystem management; regime shifts; phase shifts; Marine ecology; Marin ekologi; naturresurshushållning; Natural Resources Management;

   Sammanfattning : Coral reefs are suffering unprecedented declines in coral cover and species diversity. These changes are often associated with  substantial shifts in community structure to new dominant organisms. Ultimately, these “phase shifts” can be persistent and very difficult to return from. LÄS MER