Sökning: "arthropods"
Visar resultat 1 - 5 av 27 uppsatser innehållade ordet arthropods.
1. Ecological risk assessment of pesticide use in rice farming in the Mekong Delta , Vietnam
Magister-uppsats, Stockholms universitet/Institutionen för naturgeografiSammanfattning : Pesticide use in rice farming is a common practice in the Mekong Delta and poses ecological risks to aquatic organisms, the environment, and human health. This study focused on the ecological risk assessment of pesticide use in rice farming using the PRIMET model as a decision support tool to evaluate the risks of pesticide exposure, ecotoxicity, and risk characterization, as well as employing the species sensitivity distribution (SSD) assessment model to calculate the potentially affected fraction (PAF) of species based on the computed predicted environmental concentrations (PECs) from PRIMET. LÄS MER
2. Population dynamics of the spruce bark beetle Ips typographus in forest conservation areas and the interaction with biodiversity and natural enemies
Master-uppsats, SLU/Dept. of EcologySammanfattning : Biodiversity is rapidly decreasing and in need of more conservation efforts. However, the tree-killing European spruce bark beetle, Ips typographus (L.), has made forest conservation controversial by affecting conservation areas and possibly adjoining managed forests, yet is still a keystone species leaving decaying wood promoting biodiversity. LÄS MER
3. Kinematic Enrolment in Four Ordovician Trilobites Using Three-Dimensional Modelling
Master-uppsats, Uppsala universitet/PaleobiologiSammanfattning : Trilobites were a successful group of marine arthropods that thrived for much of the Palaeozoic Era. Akey innovation of trilobites involved the capacity to enrol their biomineralized exoskeletons for protection; a trait that appeared early in their evolutionary history during the Cambrian Period. LÄS MER
4. The evolutionary origins of consciousness
Magister-uppsats, Högskolan i Skövde/Institutionen för biovetenskapSammanfattning : Some unanswered questions about consciousness as a biological phenomenon lie in its evolutionary origin and distribution among living organisms. Which animals are conscious and when did consciousness appear in the history of life on earth? The purpose of this thesis is to shed light on these long-standing questions by reviewing the literature on the evolutionary approaches to the fundamental concept of phenomenal consciousness. LÄS MER
5. An ecological investigation of spiders in coastal meadows : in Uppland and Sörmland
Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildningSammanfattning : Coastal meadows are important habitats for many animals, but the habitats are threatened by changes in land use such as abandonment of grazing. On the Swedish East coast, many coastal meadows can be found and they are highly influenced by the brackish marine environment which supports large populations of spiders. LÄS MER