Sökning: "secondary forest ecosystems"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden secondary forest ecosystems.

1. 1. Förekomst och spridning av hänglavar från äldre skogar till unga tidigare avverkade områden i Västerbottens inland

   Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Emma Maksimova; [2023]
   Nyckelord :Lichens; Dispersal; Picea abies; Pinus sylvestris; Epiphytic; Hair lichens; Alectoria; Bryoria; Usnea;

   Sammanfattning : The Swedish forestry and the use of clearcutting models has resulted in great losses of older forests in Sweden, resulting in several species being affected negatively. Hair lichens are important organisms that are providing several ecological functions in forest ecosystems and are declining due to being associated with older forests with high continuity. LÄS MER

3. 2. Legacy effects of temperature alterations on microbial resistance and resilience to drying and rewetting

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Franklin Lee Harris; [2023]
   Nyckelord :microbial ecology; soil; carbon dynamics; high latitudes; climate change; moisture stress; isotopes; respiration; trait based ecology; soil microbes; Environmental Changes in High Latitudes EnCHIL ; Earth and Environmental Sciences; Biology and Life Sciences;

   Sammanfattning : With warming in soils due to climate change, a series of secondary factors arise, which have multifaceted effects on soil microbial communities. Of these, alterations to soil moisture are among the most crucial to understanding how microbial functions will change in the face of climate change. LÄS MER

4. 3. Analysis of simulated functional diversity in tropical forests: Differences between cultivated and naturally grown secondary forests in Cambodia

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Clarissa Graf; [2023]
   Nyckelord :physical geography; ecosystem analysis; functional diversity; plant functional traits; ecosystem modelling; secondary forest ecosystems; sustainable forest management; LPJ-GUESS; Earth and Environmental Sciences;

   Sammanfattning : Accelerated deforestation represents a major global environmental concern. Over the last decades Cambodia has experienced a drastic decrease in forest cover and measures to halt deforestation have not been as effective as planned. LÄS MER

5. 4. Fragmentation in graupel snow collisions

   Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Martanda Gautam; [2022]
   Nyckelord :Ecosystem Analysis; Clouds; Snow; Graupel; SIP; Fragmentation; CKE; Rime Fraction; Earth and Environmental Sciences;

   Sammanfattning : Aircraft observations of precipitating clouds with cloud top temperatures higher than -38°C have revealed that Secondary Ice Production (SIP) is responsible for presence of majority of ice particles. One such SIP mechanism is fragmentation via collisions between ice particles. LÄS MER

7. 5. Probabilistic ecological risk assessment of secondary poisoning from DDT

   Master-uppsats, Lunds universitet/Miljövetenskaplig utbildning

   Författare :Alice Rundegren; [2019]
   Nyckelord :probabilistisk riskbedömning; toppredatorer; DDT; diklordifenyltrikloretan; plantskola; skogsplantskola; artkänslighetsfördelning; bioackumulering; förorenad mark; indirekt exponering; Monte Carlo simulering; probabilistic risk assessment; plant nursery; species sensitivity distribution; polluted soil; indirect exposure; bioaccumulation; Monte Carlo simulation; dichlorodiphenyltrichloroethane; Earth and Environmental Sciences;

   Sammanfattning : Although prohibited since decades, dichlorodiphenyltrichloroethane (DDT) and its metabolites still remain in the soil and pose a threat to ecosystems, where especially birds are susceptible to toxic effects. In this thesis, a model developed in the 1990s was used and updated in order to estimate the risks of DDT to top predators at a forest-plant nursery site. LÄS MER