Essays about: "population densities"

Showing result 16 - 20 of 82 essays containing the words population densities.

  1. 16. Behavioural Responses of Ungulates to Sound Systems : can simulated risk influence behaviour?

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Carolin Veronika Berndt; [2021]
    Keywords : ungulates; landscape of fear; behavioural response; predation risk; playback experiment; ABR; management strategies;

    Abstract : Increasing ungulate densities all over Europe are intensifying the ongoing human-wildlife conflict, embodied by mainly economical losses through damages in forestry and agriculture. Given the current circumstances, farmers and forest owners prefer a decrease in ungulate numbers through direct population control, whereas other stakeholders, such as hunters, wildlife watchers or photographers, prefer higher wildlife numbers. READ MORE

  3. 17. Modeling of carbon plasma discharges in high-power impulse magnetron sputtering

    University essay from Linköpings universitet/Plasma och ytbeläggningsfysik

    Author : Henrik Eliasson; [2021]
    Keywords : ;

    Abstract : Diamond like carbon (DLC) is a metastable state of amorphous carbon that has very important and wide-ranging thin film applications. DLC has a strong resemblance to pure diamond and exhibits many traits of real diamond, like mechanical hardness and chemical inertness, but with a drastically lower deposition cost. READ MORE

  4. 18. Effects of whitefish speciation on piscivorous birds : A dietary study of piscivorous birds in central and northern Sweden

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Erik Söderlund; [2021]
    Keywords : Coregonus lavaretus; piscivorous; birds; diet; speciation;

    Abstract : The ecological communities we observe today are a product of the bidirectional interactions between ecological and evolutionary processes. Although the effects of ecological processes on population divergence and speciation have been studied extensively, far less is known about the effects of divergence and speciation on ecological dynamics. READ MORE

  5. 19. Physical microhabitat requirements for Margaritifera margaritifera and the influence of hydro- and morphodynamics on mussel bed stability

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Tove Westberg; [2020]
    Keywords : Stream restoration; Freshwater pearl mussel; Microhabitat requirements; Sediment transport; Mussel translocation;

    Abstract : Margaritifera margaritifera is an endangered freshwater pearl mussel with population declines throughout its Holarctic range. Boulder-bed channels with little input of fine sediment in previously channelized streams are abundant in Sweden. Hence, restoration efforts for M. READ MORE

  6. 20. Responses to declining zoobenthos abundance : Changes over time in diet and growth of Arctic charr (Salvelinus alpinus)

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Douglas Skarp; [2020]
    Keywords : charr; zoobenthos; growth; diet;

    Abstract : A decline in the density of zoobenthos has taken place in Lake Abiskojaure in the northern Swedish mountains between 1988 and 2019 but no response can be seen in the abundance (CPUE) of Arctic charr (Salvelinus alpinus) that feed mainly on benthic invertebrates. To evaluate if possible shifts in resource use of charr explain this lack of change in population abundance, stomach contents (i. READ MORE