BISC 102 Study Guide - Final Guide: Decomposer, Photosynthesis, Heterotroph
19 Jan 2018
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Document Summary
Energy: half is absorbed or reflected by atmosphere also by non-photosynthetic surfaces. Lost from terrestrial ecosystems through runoff + groundwater: ecosystem components: Primary producers: organisms that synthesize their own food (convert energy from non-living sources into chemical energy) Consumers (harvest chemical energy from organic molecules), heterotrophs. Decomposers: feed on dead organisms or their waste products ie. worms, fungi, insects, prokaryotes. Open ocean provides very little npp (g/m^2/yr), but most globally. Globally: npp greater in terrestrial habitats + near equator. Locally: npp lower in deserts, limited by nutrients: limiting nutrient? must be added for production to increase. Deep ocean, fossil fuels, biotic (living and dead) Co2 into atm: burning of fossil fuels, cellular respiration (by decomposers, primary consumers, phytoplankton) Some n will escape in ground water, runoff. Algae die off, decomposers bloom + use up o2. Anoxic conditions (no o2) ---> fish kills, dead zones. Male has 2 palps, each transfer sperm to female.
