LIFESCI 1 Lecture Notes - Lecture 27: Pollination, Coral Bleaching, Paramecium
Document Summary
Community: any assemblage of populations living in a prescribed area or habitat at a given time. Species diversity of a community is the variety of organism that make up the community. Species richness=the number of different species in the community. Relative abundance (evenness)=the proportion each species represents of all individuals in the community. Intraspecific interactions= between members of the same species. Obligate mutualism: both partners dependent on the relationship. Facultative mutualism: each partner benefits, but is not dependent on the relationship. Can be obligate for one partner and facultative for the other. Loss of zooxanthellae (algae) as a response to thermal stress. > ecosystem can shift from coral-dominated to algal-dominated. Organisms utilize resources in short supply, reducing availability to other organisms (indirect) Individual harms other individual while seeking a resource (direct) 2 species of paramecium, grown alone & together. Ecological niche: niche a species could live in. Realized niche: niche a sepcies actually live in.
