GEOL 1340 Chapter Notes - Chapter 16: Fire Ecology, Habitat Destruction, Life Zone
2 Dec 2016
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Plants and algae link btwn solar e and biosphere. Vascular plants: land plants that have conductive tissues and true roots. Biomass: total organic matter with chem e. Measured as net dry weight of all organic material. Determines biomass available for consumption by heterotrophs/consumers. Cycling of nutrients and e flow btwn organisms determines structure. Carbon cycle response to the mount pinatubo eruption. T decreased in n hemisphere and global co2 levels declined. Artificial n goes to ocean and disturbs aquatic ecosystem. Low oxygen conditions that limit marine lift. Sunlight to producers and flows higher up levels of consumers. Trophic level: organisms at same feeding level. Start with producers and end with detritivores. Most e consumption at bottom of food chain where plant biomass is higher. Biomagnification: chemicals that become increasingly concentrated at each higher trophic level. Persistent organic pollutants (pops: communities and species distribution. Interacting populations of living plants and animals in place. Parasitism: one species benefits and other is harmed.
