Essays about: "Ecology"

Showing result 1 - 5 of 1398 essays containing the word Ecology.

  1. 1. Taxonomy of the Rufous-naped lark (Mirafra africana) complex based on song analysis

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildningUppsala universitet/Zooekologi

    Author : Marianne Kristine Nymark; [2021]
    Keywords : rufous-naped; lark; mirafra; africana; systematics; taxonomy; ecology; zoology; song analysis; subspecies; integrative taxonomy; clinal variation; LDA; post hoc Tukey HSD test; Raven Pro;

    Abstract : The Rufous-naped lark Mirafra africana complex consists of 22 subspecies spread across the African continent. Several of the subspecies have recently been suggested to potentially be treated as separate species. In this study a comparative analysis was done on the song from seven of the subspecies: M. a. READ MORE

  2. 2. How does hydropeaking and geological substrate affect aquatic macroinvertebrates in a regulated river?

    University essay from Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Author : Andreas Vernby; [2021]
    Keywords : Hydropeaking; geological substrate; aquatic macroinvertebrates; EPT species; Hester-Dendy samplers; Korttidsreglering; geologiskt substrat; akvatiska makroevertebrater; EPT; Hester-Dendy-provtagare;

    Abstract : Hydropower is an important source of renewable energy, but is often a cause of degradation to river ecosystems. Hydropeaking, i.e. the frequent alteration of discharge, is a process involved in hydropower generation and has been proven to affect aquatic organisms negatively. READ MORE

  3. 3. Tallsåddens potential för återbeskogning av marker med tjocka humustäcken eller torv i norra Sverige

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

    Author : Torben Svensson; [2021]
    Keywords : Pinus sylvestris; skogsföryngring; skogssådd; sådd; tall; torvmark; torvtäckt mark; våt fastmark; återbeskogning; Peat covered soil; peatland; Pinus sylvestris; reforestation; Scots pine; sowing; wet mineral soil;

    Abstract : Kostnaden för frösådd är oftast lägre än för plantering och lyckade sådder ger vanligen återväxt med högre stamantal. I praktiskt skogsbruk tillämpas skogssådd inte på alla marker där åtgärden kunde vara ett realistiskt alternativ. Särskilt stor är tvekan att så på marker med tjocka humustäcken. READ MORE

  4. 4. A lynx in a sheep's pasture : environmental factors and hunting affecting lynx depredation on domestic sheep in Sweden

    University essay from SLU/Dept. of Ecology

    Author : Marc Velling; [2021]
    Keywords : Lynx lynx; Scandinavia; conservation; human-wildlife conflict; depredation; spatial analysis; survival analysis; protective hunting; carnivore; lethal control;

    Abstract : Large predators have made a return in Europe in the past decades. In Scandinavia, the Eurasian Lynx (Lynx lynx) has expanded its distribution further south and recolonized past areas. Due to the recolonization, lynx management has become part of the public discourse in Sweden. One factor of this discourse is depredation on domestic sheep. READ MORE

  5. 5. Intercropping oats with annual clovers : effects on yields and aspects of biodiversity

    University essay from SLU/Dept. of Ecology

    Author : Anna Douhan Sundahl; [2021]
    Keywords : intercropping; cover cropping; pollinators; natural predators; weeds; clover; oats;

    Abstract : The use of fertilizers, pesticides and herbicides has contributed to greatly increase the crop yields per hectare. Humanity has become reliant on artificial inputs overshadowing usage of resources from ecosystem services that we continue to weaken further, by using agricultural practises decreasing landscape and species diversity. READ MORE