Sökning: "Johan Eklöf"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Johan Eklöf.

  1. 1. Anthropogenic Disturbances and Shifts in Tropical Seagrass Ecosystems

    Författare :Johan S. Eklöf; Nils Kautsky; Patrik Rönnbäck; Teresa Alcoverro; Stockholms universitet; []
    Nyckelord :Aquaculture; feedback mechanisms; Kenya; management; overgrazing; regime shift; resilience; seagrass; seaweed farming; sea urchins; Tanzania; trophic cascades; Zanzibar; NATURAL SCIENCES; NATURVETENSKAP; Marine Ecotoxicology; marin ekotoxikologi;

    Sammanfattning : Seagrasses constitute the basis for diverse and productive ecosystems worldwide. In East Africa, they provide important ecosystem services (e.g. fisheries) but are potentially threatened by increasing resource use and lack of enforced management regulations. LÄS MER

  2. 2. Effects of Marine Protected Areas on Tropical Seagrass Ecosystems

    Författare :Elisa Alonso Aller; Johan S Eklöf; Charlotte Berkström; Martin Gullström; Glenn Hyndes; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; coastal ecosystems; seagrass; marine protected areas; management; conservation; fish; herbivory; Western Indian Ocean; East Africa; tropical; marin ekologi; Marine Ecology;

    Sammanfattning : Seagrass beds are highly productive coastal ecosystems that sustain a rich and diverse associated fauna and flora. Increasing anthropogenic pressures threaten seagrass ecosystems and have already led to major seagrass losses across the world. LÄS MER

  3. 3. Novelty in social-ecological systems: understanding the past to plan the future

    Författare :Yosr Ammar; Thorsten Blenckner; Susa Niiranen; Magnus Nyström; Johan Eklöf; Stockholms universitet; []
    Nyckelord :;

    Sammanfattning : Human activities are shaping the Earth system and creating novel properties in the intertwined Social-Ecological Systems (SES). Although novelty is acknowledged in SES theories, the concept of novelty is not well understood, and little mathematical formalization and empirical foundations have been made. LÄS MER

  4. 4. Effects of community- and government-managed marine protected areas on tropical seagrass and coral communities

    Författare :Angelica Chirico; Johan Eklöf; Nils Kautsky; Even Moland; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; coastal ecosystems; conservation; marine spatial planning; locally managed; fisheries closure; benthic communities; fish; foundation species; macroalgae; secondary succession; life-history; trait variability; plasticity; tourism; human disturbance; fishing; experimental research; Western Indian Ocean; causal modelling; structural equation model; permanova; multivariate data; Marine Ecotoxicology; marin ekotoxikologi;

    Sammanfattning : Tropical seagrass beds and coral reefs are among the most productive and diverse ecosystems on Earth and provide ecosystem services, such as fish production and coastal protection, and support livelihoods of millions of people. At the same time, these ecosystems are threatened globally by anthropogenic disturbances, such as overfishing, pollution and global warming. LÄS MER

  5. 5. Identification and implications of fish nurseries in tropical and subtropical seascapes

    Författare :Linda Eggertsen; Charlotte Berkström; Nils Kautsky; Johan Eklöf; Simon Pittman; Stockholms universitet; []

    Sammanfattning : Many species of reef fish reside in specific nursery habitats as juveniles. Seagrass meadows, and mangroves are examples of well-recognized nursery habitats, but only recently canopy-forming seaweeds have been found to provide important habitats for some fish species in the tropics. LÄS MER