EARTH122 Lecture 11: earth122 chapter 10 -17
29 Apr 2017
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Emergent properties: system characteristics not shown by individuals. Remote sensing: technologies collect info from far away. Allopatric speciation: species formation due to physical separation. Endemic species: only in certain areas (vulnerable) Niche: organism"s use of resources and its role in community. Population dispersion: random, uniform, or clumped (most common) Survivorship curves: type 1 (human, death at old age), type 2, type 3 (most death at young age) K-selected species: animals with few off springs (good competitors) Keystone species: particular strong influence in communities. Succession: series of change after disturbance in community. Pioneer species: first to arrive after primary succession. Total fertility rate: avg number of birth per female. Replacement fertility: the total fertility rate that keeps the population stable = 2. 1. Soil profile o (organic matter), a (topsoil), b, c (broken parental), r (parental), w (water layer in some soil) Recombinant dna: dna patched together from multiple organisms. Transgenic organisms: organisms that contain dna from another species.
