The Origins of Agriculture: An Evolutionary Perspective

abundance actual adaptation agent agricultural systems agroecology animal appearance approach areas assume become behavior biological cause components consider consumed contribution crop cultivated cultural cultural change Darwin determined diet direct discussion dispersal domestication early ecology effects environment environmental established evolution evolutionary evolved example existing explain expressed feeding Figure fitness fruit function genetic given greater growth highly human important incidental increase individual interaction least less limit major means natural natural selection noted occur organisms origin origin of agriculture particular patterns periods permit placed plants population position possible potential predator present pressure problem production propagules protection reasons region relationship relative reproduction require response result seeds seen selection social society sources specialized species strategy subsistence success theory tion traits understanding utilization valuation variable variation weeds wild yield