Carbon Cycling (Fig. 31.26). Nitrogen Cycling (Fig. 31.24)

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Presentation transcript:

Carbon Cycling (Fig )

Nitrogen Cycling (Fig )

Biomes

Fish - one hundred Beetles - one thousand Daphnia - hundreds of thousands Protozoa - millions Parasites and predators - tens of thousands Insect herbivores - thousands Oak tree - one Parasites and predators - 100g Herbivores - 5 kg Oak tree - 30 tonnes Primary carnivores (pelagic fish) Herbivores (zooplankton) -1.5 Producers (phytoplankton) Primary carnivores Herbivores Producers a) b) c) d) e)

Alder, Alnus sinuata Cottonwood, Populus trichocarpa Mountain avens, Dryas drummondi Willow, salix Liverworts Lichens River beauty Epilobium (rare) Horsetail Equisetum Blue-green algae Dryas Alder Pioneer Soil depth (cm) Soil N (gm ) Soil pH Spruce, Picea sitchensis Western hemlock, Tsuga heterophylla Seral stage Litterfall (gm yr ) Spruce Time (years) since retreat of glacier

Global Plant Diversity <100 species per 10 4 km >5000 species per 10 4 km

Elton and Nicholson, 1942

Lepp & Schmidt, 2004

Demographics - survivorship curve

Demographics - life table