ZenToks Publication

Chapter 11

Adaptive Success of Terrestrial Arthropods: Evolution, Ecology, and Agricultural Significance

Abstract/Preface

Terrestrial arthropods are the most ecologically diverse and numerically dominant invertebrate assemblage on Earth, having colonised virtually every land biome over more than 400 million years of evolutionary history. Their success stems from an integrated suite of innovations: a chitinous, waterproof exoskeleton, jointed appendages enabling specialised locomotion and resource acquisition, efficient tracheal respiration, flight-mediated dispersal, and holometabolous metamorphosis decoupling larval and adult niches. Short generation intervals and high fecundity facilitate rapid adaptive evolution, exemplified by recurrent insecticide-resistance events in global pest populations. Mouthpart diversification from ancestral chewing mandibles to sucking, siphoning, and piercing configurations has unlocked dietary resources unavailable to less plastic taxa. In agro-ecosystems, arthropods deliver indispensable services as pollinators, predatory natural enemies, and soil engineers, alongside their role as major crop pests. This chapter synthesises current knowledge on arthropod evolutionary success and explores implications for agricultural extension education, integrated pest management, and sustainable food production in smallholder farming systems.