Sökning: "grassland proportion"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden grassland proportion.

  1. 1. Effects of climate and land-use change on retention of semi-natural grassland plant species : A landscape study in southern and central Sweden

    Master-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Författare :Malin Jonsson; [2023]
    Nyckelord :Semi-natural grasslands; Climate change; Land-use changes; Large-scale study; Red list; Hävdgynnade gräsmarker; klimatförändringar; markanvändningsförändringar; storskalig studie; rödlistan;

    Sammanfattning : Plants associated with the historical agricultural landscape are threatened. Land-use changes causing loss, fragmentation and degradation of semi-natural grassland habitats have resulted in many species becoming Red Listed. LÄS MER

  3. 2. The effect of habitat type on farmland bird populations : In Tarnava Mare Natura2000 reserve, Romania

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning; Uppsala universitet/Institutionen för ekologi och genetik

    Författare :Krisztina Csiki; [2020]
    Nyckelord :farmland; birds; agriculture; Tarnava; Mare; Natura2000; reserve; yellowhammer; tree sparrow; skylark; red-backed shrike; common whitethroat;

    Sammanfattning : Widespread extinction is a critical threat to biodiversity and is largely caused by human overexploitation of habitat and populations. A widely used and hence well studied organism group for indication of biodiversity is birds. LÄS MER

  4. 3. Spatial and temporal variability in grassland structure associated with different densities of the white rhinoceros (Ceratotherium simum) in a South African savanna

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Emilia Malmström; [2019]
    Nyckelord :white rhinoceros; african savanna; keystone species; herbivory; cascading effects; poaching;

    Sammanfattning : The direct and indirect relationships between species in different trophic levels are referred to as trophic dynamics and are important in maintaining the function of ecosystems. Megaherbivores may have effects both directly and indirectly on other species since their impact may be disproportionately large relative to their population size. LÄS MER

  5. 4. Effect of restoration and surrounding grassland proportion on the dung beetle metapopulation abundance in the fragmented semi-natural grasslands : dung beetles in restored semi-natural grasslands

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Vivek Babu; [2018]
    Nyckelord :dung beetle; grassland proportion; restoration; Aphodius; Geotrupes; abundance; semi-natural grassland; Scarabaeidae; metapopulation; habitat fragmentation; landscape ecology;

    Sammanfattning : The importance of landscape composition surrounding the local habitats is increasingly recognized, especially with goal of enhancing the understanding about its role in various conservation frameworks. The dung beetles which depend on human mediated ephemeral resources (Dung from domestic animal) gives a valuable opportunity for understanding landscape moderated effects of both the landscape structure as well as sensitive grazing management on the local populations of semi-natural grasslands in Sweden. LÄS MER

  7. 5. The surrounding landscape’s impact on species density in species-rich grasslands

    Kandidat-uppsats, Linköpings universitet/Biologi

    Författare :Frida Eningsjö; [2017]
    Nyckelord :Landscape; plants; species density; species-rich grassland;

    Sammanfattning : When the agricultural revolution took place, the biodiversity decreased and during the last century more than 90 % of the area of species-rich grasslands has been lost. Fragmentation has occurred with the area lost and insects, e.g. butterflies, suffer because of this. LÄS MER