Efficiency of energy harvest

Efficiency of energy harvest - Efficiency of energy harvest...

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Efficiency of energy harvest Might expect that if selection generally favors more efficient strategies of energy capture, this would result in evolutionary/historical trend too Arranging available data to match historical sequence of production modes (hunter- gatherers, swidden agric., hoe agriculture with and w/o herding, intensive agric., & mechanized agric.), can detect some sign of such a trend: [ TABLE 2 ] (Nuñoa case is an exception, but after all this is a very marginal environment) But evaluating this proposed trend in efficiency is complicated by several things: 1) Small sample size: data are too meager to judge if representative, and at least first 4 types may not be significantly. different from each other (see Hames 1989 reading, which reaches similar conclusion) 2) Incomplete data for each case (!Kung = 6 weeks; Tsembaga doesn't include foraging = important protein source but very time-consuming; China = data is only for rice; U.S. = data only for corn, doesn't include transportation/processing costs; etc.) 3) Using synchronic (cross-sectional) data to argue diachronic (historical) progression
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Efficiency of energy harvest - Efficiency of energy harvest...

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