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Agriculture and Grazing on Arid Lands
Traditional Peoples 633
56 other sections not shown
algae Antarctic Antarctic krill aquatic areas atmosphere bacteria beetles benthic biological biomass canopy carbon carbon cycle chemical climate coastal zone concentrations conservation crop cycle density distribution Ecology ecosys ecosystems effects energy environment environmental equilibrium example extinction factors feeding female fire fish fishery forage forest freshwater gases gene genebank genetic global grasslands grazing greenhouse growth habitats herbivores human impacts important increase infanticide insects interactions intertidal introduced species invertebrates island biogeography islands keystone species krill lakes land landscape larvae levels LMEs major male mammals marine methane microbial natural North America nutrients occur ocean patches patterns photosynthesis phytoplankton plankton plants population potential predators processes production range region relatively reproduction result rivers savannas sediments seed soil spatial species diversity structure surface survival temperature terrestrial tion trees trophic levels tropical vegetation wetland wetland animals zebra mussels zooplankton