Essays about: "population control"

Showing result 16 - 20 of 516 essays containing the words population control.

  1. 16. Population dynamics of the spruce bark beetle Ips typographus in forest conservation areas and the interaction with biodiversity and natural enemies

    University essay from SLU/Dept. of Ecology

    Author : Evelina Andersson; [2023]
    Keywords : spruce bark beetle; population dynamics; conservation areas; biodiversity; natural enemies; species richness; managed forests; woodland key-habitats; nature reserves;

    Abstract : Biodiversity is rapidly decreasing and in need of more conservation efforts. However, the tree-killing European spruce bark beetle, Ips typographus (L.), has made forest conservation controversial by affecting conservation areas and possibly adjoining managed forests, yet is still a keystone species leaving decaying wood promoting biodiversity. READ MORE

  3. 17. House price and fertility behavior among different families - Empirical study from CFPS data

    University essay from Handelshögskolan i Stockholm/Institutionen för nationalekonomi

    Author : Huichan Chen; [2023]
    Keywords : House Price; Fertility Rate; Gender Effect; Birth Plan Policy; One Child Policy;

    Abstract : This paper uses panel data from the China Family Panel Studies (CFPS) to examine the relationship between housing prices and fertility behavior in China, this paper analyzes sample data from 2014, 2016 and 2018 and uses Probit model and the logit model to study how house price affects fertility behavior among different families, furthermore, after the removal of One Child Policy, how the fertility behavior would react to house price. The study found that rising housing prices have a significant negative impact on fertility behavior, and that this negative impact persists even when using instrumental variables to control for endogeneity. READ MORE

  4. 18. Hawk-kite as a scaring method for avian pests in Kenyan rice fields

    University essay from SLU/Dept. of Ecology

    Author : Linnea Hollsten; [2023]
    Keywords : bird; crop; damage mitigation; pest control; repellent;

    Abstract : The human population is increasing globally, and so are the human-wildlife interactions and conservation conflicts. One source of conservation conflict is the crop damage caused by wildlife. Crop damage is negatively affecting farmers, but also the wildlife due to lethal methods used to reduce the damage. READ MORE

  5. 19. Insulated Metabolic Exchange for Sustainable Agriculture and Biotechnology

    University essay from KTH/Industriell bioteknologi

    Author : Ellen Engquist; [2023]
    Keywords : Biofertilisers; nitrogen; cyanobacteria; E. coli; allantoin; Biogödsel; kväve; cyanobakteria; E. coli; allantoin;

    Abstract : Mellan 1960 och idag har världspopulationen dubblerats medan matproduktionen tredubblats. Det har möjliggjorts av kemiskt framställda gödsel som introducerades på mitten av 1900-talet. Sedan 1965 har användandet av kvävegödsel ökat sexdubblet. READ MORE

  6. 20. Towards an open, automated, and reproducible synthetic population of Switzerland : A preparatory, modular pipeline for agent-based mobility simulations

    University essay from KTH/Transport och systemanalys

    Author : David Micallef; [2023]
    Keywords : ;

    Abstract : This thesis explores the development of an automated re-synthesising tool, called EasySynth, to generate a Swiss synthetic population and travel diaries from publicly available data. The aim is to overcome the limitations of restricted-access real population data while maintaining control over anonymisation and statistical accuracy. READ MORE