Sökning: "palaeoenvironmental reconstructions"

Hittade 3 uppsatser innehållade orden palaeoenvironmental reconstructions.

  1. 1. Systematic comparison of the relative accuracy of vegetation surveys and soil DNA metabarcoding : Assessing plant biodiversity at different spatial scales

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

    Författare :Kimmo Kumpula; [2020]
    Nyckelord :DNA metabarcoding; biodiversity assessment; environmental DNA; high-throughput sequencing; subarctic;

    Sammanfattning : Analysis of soil-derived DNA has been shown to minimize problems seen during traditional vegetation surveys, e.g. by matching the eDNA to a reference database for taxonomic identification rather than relying solely on taxonomic expertise. However, it has been debated to what extent and how accurately eDNA acts as a proxy for biodiversity. LÄS MER

  3. 2. Evidence for birch forests and a highly productive environment near the margin of the Fennoscandian ice sheet in the Värriötunturit area, northeastern Finland

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Fredrik Bogren; [2019]
    Nyckelord :Early Holocene; productive ice-marginal environment; subarctic birch forests; plant macrofossils; pollen; palaeoenvironmental reconstructions; palaeoclimate reconstructions; Värriötunturit; Kuutsjärvi; northeastern Finland; northern Fennoscandia;

    Sammanfattning : High-resolution records of early Holocene deposits are rare, and as a consequence reconstruction of terrestrial environments very soon after the deglaciation has often been difficult. In this study the palaeoenvironmental conditions of early Holocene (c. 10600-7500 cal. LÄS MER

  4. 3. Late Ordovician communities from North America

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Charlotte Ahlgren; [1997]
    Nyckelord :North America; Cincinnati region; Upper Ordovician; Cincinnatian; fossil communities; palaeoenvironmental reconstructions; Earth and Environmental Sciences;

    Sammanfattning : Sammanfattning: Med utgångspunkt från den fossiliserade hårdvävnaden har paleomiljö och faunor, från sex olika tidpunkter och platser i de överordoviciska lagren i Cincinnati-området (USA), rekonstruerats. Materialet består vanligen av kalksten, men en del lerstens-stuffer förekommer också. LÄS MER