Sentences with phrase «between plant productivity»
He found that there is a very strong relationship between plant productivity and deer and mountain lion density.
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Low levels of productivity were a direct result of these conditions, but also as a consequence of low levels of organic matter in the soil (between 0.3 and 1 percent), acidity (pH fluctuating between 4.5 and 5) and low biodiversity (only 2 to 7 plant species were found in the agricultural systems and only 1 to 8 species in the forest systems).
Lost in diversity: the interactions between soil - borne fungi, biodiversity and plant productivity.
This decrease results because plant respiration also increases with temperature, and some of the photosynthetic gains (that lead to increased productivity) are lost through a) growth and maintenance respiration (Ryan et al. 1995), or b) seasonal differences between photosynthetic gains in the spring and increased respiration in the fall.
http://earthobservatory.nasa.gov/Features/GlobalGarden/ ««Between 1982 and 1999, 25 percent of the Earth's vegetated area experienced increasing plant productivity — a total increase of about 6 percent,» says Ramakrishna Nemani, the study's lead scientist.