WarmupAn ecologist is concerned that the population of an endangered species of plant continues to drop.

List as many possible causes for a dropping population as you can think of.

ABIOTIC CYCLESJANUARY 24, 2011

Learning Goal

You will be able to describe how the carbon and nitrogen cycles work, and how they’re currently imbalanced.

You’ll understand how abiotic factors affect soil quality for growing plants.

Carbon Cycle

Nitrogen Cycle

Plants with nitrogen-affixing nodules in their roots: legumes, clover, alfalfa, soybeans, peas, peanuts, and beans.

Soil Quality

Acidity Salinity Carbon Nitrogen Phosphorous

Why use manure, guano, compost, or other materials to enrich the soil?

How would you cycle farmland crops to maintain its nitrogen levels?