Sökning: "rainforests"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet rainforests.

  1. 1. Tourism, Ecosystem Functions, and Human-Environmental Relations

    Författare :Stefan Gössling; Institutionen för tjänstevetenskap; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Social geography; Ecology; Zanzibar; world system theory; sustainable tourism; sustainable development; rainforests; human-environmental relations; groundwater; environmental consciousness; ecotourism; ecosystem functions; economic transition; cost-benefit analysis; coastal zone management; coastal communities; climate change; Air-traffic; biodiversity; Environmental technology; pollution control; Ekologi; Zanzibar; Socialgeografi; Miljöteknik; kontroll av utsläpp;

    Sammanfattning : The thesis aims at deconstructing the sustainable tourism paradigm: can tourism be "a global strategy for sustainable development", as the tourist industry claims? And will developing countries in particular profit from tourism development?To most international organizations and institutions (from the World Wide Fund for Nature to The World Bank), tourism, if carefully managed, is a positive, sustainable development tool. However, the research presented in this thesis exposes this view as unrealistically optimistic for at least three reasons: first of all, global environmental change caused by tourism has never been investigated and integrated with the discourse on sustainable tourism development. LÄS MER

  3. 2. Lichens in Mountain Rainforests of Tanzania : Studies of Usnea and Calicioids

    Författare :Stella Gilbert Temu; Sanja Tibell Savić; Leif Tibell; Philippe Clerc; Göran Thor; Donatha Tibuhwa; Einar Timdal; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lichens; Usnea; calicioids; molecular phylogeny; secondary chemistry; morphotypes; Biology with specialization in Systematics; Biologi med inriktning mot systematik;

    Sammanfattning : Lichens occur in various habitats. They often have narrow niches and are sensitive to environmental changes leading to their use as bioindicators of environmental disturbances and conditions; air and heavy metal pollution, agricultural toxins, assessing forest continuity and drought tolerance. LÄS MER

  4. 3. Consequences of bushmeat hunting in tropical forests

    Författare :Edu Efiom; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Tropical rainforests; bushmeat hunting; primates; seedling recruitment; interseedling competition; community composition; functional traits; ecosystem services; human livelihoods;

    Sammanfattning : This thesis evaluates the effect of bushmeat hunting in southeastern Nigerian rainforests on: 1) adult tree, seedling, and animal community compositions 2) germination and survival among seedlings in association with competition 3) changes in community composition at multiple trophic levels 4) leaf nitrogen concentration (LNC), leaf mass per area (LMA) and stem specific density (SSD) 5) on human reliance on forest resources and rural people use forest resources. Data for the first four evaluations were obtained from surveys, manipulative experiments in seedling plots and collected leaf samples in three pairs of sites with high (hunted sites) and low (protected sites) hunting pressure but with similar adult tree composition. LÄS MER

  5. 4. Rooting for forest resilience : Implications of climate and land-use change on the tropical rainforests

    Författare :Chandrakant Singh; Ingo Fetzer; Lan Wang-Erlandsson; Ruud van der Ent; Axel Kleidon; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Climate change; forest dynamics; human influence; land-use change; rainforest tipping; remote sensing; resilience; root zone storage capacity; tropical forests; vetenskap om hållbar utveckling; Sustainability Science;

    Sammanfattning : Tropical rainforests in the Amazon and Congo River basins and their climate are mutually dependent. Evaporation from these forests help regulate the regional and global water cycle. Furthermore, these rainforests themselves depend on precipitation to sustain their structure and functions. LÄS MER

  7. 5. Natural Resource Use Conflict: Gold mining in tropical rainforest in Ghana

    Författare :Wisdom Akpalu; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Optimal taxation; Efficiency; Externality; Dynamic analysis; Firm behaviour.;

    Sammanfattning : Extraction of gold in many tropical countries is done in rainforests that provide non-timber forest benefit flows. Our model is the first attempt at modelling this conflict in a developing country in the tropics where capital for mining is from foreign direct investment (FDI). LÄS MER