Ecology Pt1
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Who wrote the first naturalist essays?
John Muir and Aldo Leopold
Who wrote Silent Spring?
Rachel Carson
Why was Silent Spring Important?
Ecology became an actual science; biomagnification
Biomagnification
the increasing buildup of toxic substances within organisms that happens at each stage of the food chain
Abiotic
nonliving chemical & physical factors
Biotic
living factors (other living organisms)
Organismal
behavioral, physiological, and morphological ways critters meet abiotic challenges
Population
group of individuals of the same species in a particular geographical area
Community
assemblage of populations of different species
Ecosystem
all abiotic factors and the community of species in an area
Biosphere
the sun of all the planet’s ecosystems
Biome
areas of predominant flora and fauna
Abiotic Factors Examples
Non-living factors: Temperature, Water, Sunlight, Wind, Rocks & Soil, Periodic Disturbances (natural disasters)
Spring
Marked by Spring Equinox (equal amt of day/night)
Summer
Marked by summer solstice (long day/short night)
Fall
Marked by Fall equinox (equal amt of day/night)
Winter
Marked by Winter solstice (long day/short night)
Rain Shadow
There is less rain on one side of a mountain range - Think of the Western (more rain) and Eastern (less rain) part of the Sierras
What are the four zones of Aquatic Biomes?
photic zone, aphotic zone, thermocline, and the benthic zone
photic zone
photosynthetic light
aphotic zone
little light
thermocline
narrow stratum of rapid temperature change (warm to cold)
benthic zone
bottom substrate (bed)
Benthos
community of organisms in Benthic zone