Applying a cultural multilevel selection framework to the adoption of sustainable management practices in California viticulture

Vicken Hillis,Adrian Bell,Jeremy S Brooks,Jodi Brandt

doi:10.1007/s11625-017-0515-4

Abstract

In light of the ongoing environmental impacts of agriculture, understanding farmer adoption of sustainable management practices (SMPs) is an important priority. Relatively little work in agricultural adoption has explicitly examined the multilevel dynamics of adoption decision-making. Yet because many SMPs involve cooperative dilemmas—they are individually costly but provide group benefits—understanding the dynamics of both individual and group level behavioral change is critical. In this paper, we argue that cultural evolutionary theory is well suited to examining the emergence and spread of cooperative SMPs, and we illustrate this claim by applying a cultural multilevel selection (CMLS) framework to the adoption of SMPs on the part of winegrape growers in California, USA. Using survey data from over 800 winegrape growers in 3 regions, we estimate the individual-level costs and group-level benefits of 44 different SMPs. We then relate this to variation in their adoption within and between winegrape growing regions to characterize the scope for cultural group selection of the various practices. We also identify a number of mechanisms that might plausibly explain the observed patterns of variation, including various forms of cultural group selection. We highlight the added value of this perspective with respect to the established approaches and outline the data requirements for researchers to conduct similar studies in other settings. Our results underscore the potential for a cultural evolutionary perspective to shed light on the multiscale mechanisms driving adoption of SMPs and, more generally, the promise of cultural evolutionary approaches to supplement existing analytical toolkits in sustainability science.

Highlights

Many agricultural systems impact the environment negatively (Gomiero et al 2011), for example contributing to soil erosion (Montgomery 2007), biodiversity loss (Donald 2004), declining water quality or availability (Rockström et al 2007; Moss 2008), and agrichemical pollution (Vitousek et al 2009)
We argue that a cultural evolutionary approach is well suited to examining multilevel social dynamics in agricultural systems
We examined variation in adoption of winegrape sustainable management practices (SMPs) within and between regional groups in California, to assess the scope for cultural group selection in the practices

Summary

Introduction

Many agricultural systems impact the environment negatively (Gomiero et al 2011), for example contributing to soil erosion (Montgomery 2007), biodiversity loss (Donald 2004), declining water quality or availability (Rockström et al 2007; Moss 2008), and agrichemical pollution (Vitousek et al 2009). Reducing these environmental impacts requires changing farmer behavior, which can be challenging when the management practices involve cooperative dilemmas—practices that produce group benefits but are costly to individual farmers. Our objective is to explicate an approach—cultural evolution—that sustainability and agricultural scientists can add to their analytical toolbox

Objectives

Findings

Conclusion