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...Structure and function of chihuahuan desert ecosystem the jornada basin long term ecological research site edited by kris havstad laura f huenneke william h schlesinger chapter whitford w g bestelmeyer b t submitted to oxford university press for publication isbn fauna effects on properties processes walter brandon this focuses direct indirect animals or their set has been primary focus animal studies experimental range jer rangeland center cdrrc during twentieth century early dealt with species that were thought reduce amount production was available support livestock establishment international biological programme ibp in late s its premise ecosystems could be modeled based energy flow designed measure through consumer populations those yielded estimates consumption live plant biomass between annual net npp turner chew from these concluded most consumers process only a small fraction as material but play important roles regulators rather than hypothesis then nearly years led expansio...