Sökning: "indigenous predators"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden indigenous predators.

  1. 1. Negotiating Wilderness in a Cultural Landscape : Predators and Saami Reindeer Herding in the Laponian World Heritage Area

    Författare :Åsa Nilsson Dahlström; Hugh Beach; Robert Paine; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Cultural anthropology; Laponia; wilderness; cultural landscape; world heritage area; Saami; reindeer herding; predators; Sweden; Kulturantropologi; Cultural anthropology; Kulturantropologi; Kulturantropologi; Cultural Anthropology;

    Sammanfattning : The UNESCO appointment of the Laponian World Heritage Area in 1996 meant that Sweden accepted the assignment of protecting both the cultural and natural values of this area for all mankind and all generations to come. Located in northern Sweden, Laponia had previously been protected for its natural values only, but the 1996 appointment determined that the local Saami reindeer herding culture should also be preserved. LÄS MER

  3. 2. Invading Herbivory. Effects of the Golden Apple Snail (Pomacea canaliculata) in Asian Wetlands

    Författare :Nils Carlsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; gastropoda; invasive species; golden apple snail; herbivory; wetland functioning; biodiversity; sustainable control; indigenous predators; size-dependent competitive ability; akvatisk ekologi; limnologi; Marinbiologi; limnology; Hydrobiology; aquatic ecology; marine biology;

    Sammanfattning : The South American golden apple snail (Pomacea canaliculata) was intentionally introduced to aquacultures in South East Asia to produce snails for human consumption, but the aquatic snails soon escaped and started to consume large amounts of rice seedlings. The aim of this thesis was to quantify the effects of this invasive herbivore on aquatic plants in natural wetlands since previous research has focused on effects of the snail in rice fields. LÄS MER

  4. 3. Herbivory, phenotypic variation, and reproductive barriers in fucoids

    Författare :Helena Forslund; Lena Kautsky; Ove Eriksson; Stein Fredriksen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Non-indigenous species; Enemy Release Hypothesis; Asexual reproduction; Phlorotannins; Distribution; Plant Ecology; växtekologi;

    Sammanfattning : Along the shores of the Northern hemisphere Fucus (Phaeophyceae) species are a prominent presence, providing substrate, shelter, and food for many species. Fucus evanescens, a non-indigenous species (NIS) in Sweden, and F. LÄS MER

  5. 4. Trophic interactions and behaviour : Studies relevant to a Baltic Sea biomanipulation

    Författare :Per B. Holliland; Sture Hansson; Elena Gorokhova; Peter Tiselius; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zooplankton; non-indigenous species; selectivity; food web; rearing environment; fish stocking; Sander lucioperca; diel vertical migration; ontogeny; ovigerous; Marine Ecology; marin ekologi;

    Sammanfattning : The main theme of this thesis is the interactions of animals with the environment and each other. The thesis was written within the framework of a biomanipulation project “Pikeperch in Himmerfjärden”. LÄS MER

  7. 5. Behaviour and life-history responses to chick provisioning under risk of nest predation

    Författare :Sönke Eggers; David Winkler; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Chick provisioning; clutch size; delayed dispersal; nest concealment; nest predation; parental care; population decline; Perisoreus infaustus; Siberian jay; Biologi; Biology; Biologi; populationsbiologi; Population Biology;

    Sammanfattning : This thesis examines risk management in breeding Siberian jays (Perisoreus infaustus), which is indigenous to the northern taiga. Parent behaviour and the nest are cryptic. A new nest is built each year. It is placed on spruce or pine branches close to the trunk and well insulated with lichens, feathers and reindeer hair. LÄS MER