Essays about: "land fragmentation"

Showing result 6 - 10 of 60 essays containing the words land fragmentation.

  1. 6. The assessment of ecosystem services provided by forest edge effects on fields in a fragmented Swedish agricultural landscape : a methodological framework

    University essay from SLU/Dept. of Crop Production Ecology

    Author : Juliette Nguyen; [2022]
    Keywords : carbon sequestration; cropping systems; DSSAT; ecosystem services; edge effect; food production; landscape diversification; landscape fragmentation; soil heterogeneity; soil organic carbon; spatial variability; total nitrogen; yield;

    Abstract : Agricultural expansion, prompted by increasing global food demand, has fragmented, simplified, and homogenized the landscape in the last decades. The resilience and sustainability of croplands are at stake, resulting in a hight vulnerability to climate change, and having major impacts on environmental protection, biodiversity preservation and food security. READ MORE

  3. 7. Stadens biologiska mångfald : ett urbant grönområdes ekosystempåverkan ur ett livscykelperspektiv

    University essay from SLU/Dept. of Energy and Technology

    Author : Linnéa Sigvardsson; Molly Lind Mayer; [2022]
    Keywords : Livscykelanalys LCA ; biologisk mångfald; grönområde; urbana grönområden;

    Abstract : Gröna stadsområden utgör en ekonomisk och social samlingspunkt. Fragmentering av grönområden är ett av de största hoten mot biologisk mångfald. Nästan 60% av alla grönområden i Sverige består av klippta gräsmattor som inte kan nyttjas av många arter. READ MORE

  4. 8. Population genetic analyses inform conservation of the endangered Clouded Apollo (Parnassius mnemosyne) butterfly in Sweden

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Veronika Mrazek; [2022]
    Keywords : Clouded apollo; Parnassius mnemosyne; Lepidoptera; Genetic diversity; Differentiation; Inbreeding; Demographic history; Gene-flow;

    Abstract : The clouded apollo (Parnassius mnemosyne) is a palearctic butterfly with a wide distribution across Eurasia. In recent decades, however, the species has declined in many parts of its distribution range. READ MORE

  5. 9. Flower-visiting insects benefit from forest in the surrounding landscape

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Emilia Sundell; [2021]
    Keywords : Apoidea; clear-cut; Coleoptera; forest; Hymenoptera; landscape composition; Lepidoptera; Syrphoidea;

    Abstract : Habitat loss and fragmentation due to agricultural practices are causing worrying declines in insect diversity and biomass. Agricultural intensification, among other things, have led to a decline in semi-natural grasslands. Forest in the surrounding landscape can have a positive effect on species abundance in grasslands. READ MORE

  6. 10. Effects of population size, density and local environment on the population dynamics of the fragrant orchid (Gymnadenia conopsea)

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Kasper Kupka; [2021]
    Keywords : Demography; Gymnadenia conopsea; local habitat; matrix models; orchids; population density; population size; stochastic growth rate; soil organic matter; quasi-extinction probability;

    Abstract : A wide majority of orchid populations are decreasing due to habitat fragmentation and to changes in land management. Population size, density and habitat quality are factors that are expected to be positively related to the viability and future growth of a population. READ MORE