Through appropriate extractions and counting you determine that there are 58 nematodes in a 1-gram sample of soil. How many nematodes would occur in 1.0 m2 area of this soil? In 1 hectare? Assume the...

Through appropriate extractions and counting you determine that there are 58 nematodes in a 1-gram sample of soil. How many nematodes would occur in 1.0 m2 area of this soil? In 1 hectare? Assume the samples came from the upper 10 cm of soil with a bulk density = 1.3 Mg/m3 . Explain the concept of an ecosystem engineer with two soil examples.