Essays about: "density dependent mortality"

Showing result 1 - 5 of 7 essays containing the words density dependent mortality.

  1. 1. Effects of ash dieback and Dutch elm disease on forest structure in Dalby Söderskog 2012-2020

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Janis Ruks; [2020]
    Keywords : Sweden; Ophiostoma spp.; Hymenoscyphus fraxineus; Phytophthora spp.; forest succession; forest structure;

    Abstract : Dalby Söderskog is a national park situated in southern Sweden. The forest is dominated by European ash (Fraxinus excelsior L.), wych elm (Ulmus glabra Huds.), pedunculate oak (Quercus robur L. READ MORE

  2. 2. Issues of geographic context variable calculation methods applied at different geographic levels in spatial historical demographic research : a case study over four parishes in Southern Sweden

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Karolina Despoina Pantazatou; [2016]
    Keywords : geographic context variables; spatial demography; historic demography; spatial longitudinal demographic research; geography; physical geography; distance calculation methods; geographic levels; GIS; Earth and Environmental Sciences; Technology and Engineering;

    Abstract : Spatial analysis is dependent on the geo-referencing quality of the spatial data, as well as on the definition of the geographic context variables used. However, these facts are rarely taken into consideration in historical demographic research where the geographic factor is considered. READ MORE

  3. 3. Life history trade-offs in Anadromous Burbot Lota lota (Linnaeus 1758) from Rickleån and Sävarån, Northern Sweden

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

    Author : Mikael Sandberg; [2015]
    Keywords : life history trade-offs; anadromous burbots; Bothnian Bay; Rickleån; Sävarån; otoliths;

    Abstract : Anadromous burbots Lota lota (Linnaeus 1758) from two similar rivers in the Gulf of Bothnia area, Sävarån and Rickleån, Northern Sweden, were compared. The aim was to test for and explain differences in ecology. Spawning burbots in Sävarån were smaller, younger, grew slower and were more densely populated. READ MORE

  4. 4. Effect of planting density and abiotic conditions on yield of Betula pendula and Pinus sylvestris seedlings in monoculture and mixture

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Jennifer McGuinness; [2014]
    Keywords : abiotic environment; Betula pendula; density gradient; Interaction effects; Pinus sylvestris; Planting density; planting composition; seedling yield;

    Abstract : How the yield of mature stands changes in response to factors such as stand composition, planting density and abiotic conditions is a developing topic, and underpins models and generalizations used by forest managers today. However, these generalizations are both the subject of debate and are limited to mature stands, leaving a knowledge gap concerning both mixed species stands and younger stands. READ MORE

  5. 5. Influence of the habitat on the potential for cannibalism and population dynamics in stream-dwelling European grayling (Thymallus thymallus L.)

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

    Author : Carl-Johan Lindström; [2010]
    Keywords : cannibalism; European grayling; Thymallus thymallus; habitat mapping; Jämtland; population dynamics; recruitment; size structured population model; stream environment;

    Abstract : Cannibalism can have major influence on fish population dynamics. A prerequisite for cannibalism is that the cannibal and the potential victim meet, and besides density effects, the encounter rate between cannibals and their victims is therefore also largely dependent on habitat use and habitat heterogeneity. READ MORE