Agroecological Systems Overview

Principles

Definition

Agroecological systems is an interdisciplinary research field and applied concept that investigates the complex ecological, social, and economic interactions within agricultural systems. It examines how these systems can be designed and managed to enhance sustainability, resilience, equity, and biodiversity, integrating diverse knowledge forms and often employing participatory methodologies to foster transformative change in food production and consumption towards ecological soundness and social justice.

Ontological type

Core Principles

System Design

Impact Assessment

Key developments

Key Figures

Soil Biodiversity Foundations era

Miguel A. Altieri [1] is a leading figure in agroecology during the Soil Biodiversity Foundations era (1982–1999), with affiliations at University of California, Berkeley [2] and Cornell University [3] among others. In this era his key contributions include articulating the ecological role of biodiversity in agroecosystems and highlighting detrital pathways and microbial food webs as core drivers of productivity and resilience, as outlined in his 1999 paper The ecological role of biodiversity in agroecosystems [4]. These contributions facilitated a shift toward system-level metrics of stability, sustainability, and resilience and supported the move from single-crop yield paradigms to field-based, experimental studies of soil–biota–detritus interactions [4]. Thus, Altieri's work, linked to University of California, Berkeley [2] and Cornell University [3], helped institutionalize agroecology as a framework for soil biodiversity and pest regulation in agroecosystems.

Ecosystem Services & Policy era

Teja Tscharntke [1] is associated with University of California, Berkeley [3] and Cornell University [4] in this era. His 2005 Landscape perspectives on agricultural intensification and biodiversity – ecosystem service management [6] contributed to the era by articulating landscape-scale biodiversity and ecosystem-service framing and showing how ecological functions can be translated into measurable service benchmarks for policy and governance. Alexandra‐Maria Klein [2] is associated with University of California, Berkeley [3] and University of Freiburg [5] in this era. Her engagement with the same Landscape perspectives paper [6] helped advance policy-relevant landscape thinking by linking biodiversity insights to ecosystem-services frameworks and illustrating how standardized landscape assessments can guide scaling of agroecological practices.

Transformative Systemic Agroecology era

Clara I. Nicholls [1] is a leading figure in agroecology during the Transformative Systemic era, with affiliations at University of California, Berkeley [3] and the University of California System [4]. Her key contributions, as articulated in the paper Agroecology and the design of climate change-resilient farming systems [5], advanced design principles for climate-resilient agroecological systems and underscored the role of systemic governance in agroecology, aligning with the era's emphasis on co-produced knowledge and multi-actor governance. Miguel A. Altieri [2] is recognized as a prominent agroecology scholar associated with University of California, Berkeley [3] and the University of California System [4]. His key contributions in this era, drawn from the same paper [5], include articulating agroecology as a design framework for climate-resilient farming and biodiversity-based practices, which supported participatory governance and transformative policy for sustainable food-system change.