rotnätets

Rotnätet is a term used in ecology to describe the subterranean network formed by plant roots, root hairs, and mycorrhizal fungi that connects individual plants within an ecosystem. The rotnätets connectivity emerges when fungal hyphae and mycorrhizal associations link roots, creating a shared conduit for water, minerals, carbon, and signaling compounds. The structure and extent of rotnätet vary with species, soil conditions, and disturbance history.

Structure and components: The network comprises fine roots, hyphae, and interplant connections via mycorrhizal networks. Arbuscular mycorrhizal fungi (AMF) and ectomycorrhizal fungi contribute differently to network architecture. In some systems, roots may physically graft, while in others carbon and nutrients are exchanged through fungal conduits without direct root contact.

Functions and ecological role: Rotnätet supports nutrient uptake, especially phosphorus and nitrogen, facilitates hydraulic redistribution during drought, and enables interplant signaling that can influence growth and defense responses. It also affects soil aggregate formation and carbon cycling, contributing to forest resilience and plant community dynamics.

Research and applications: Scientists study rotnätet using isotopic tracers, DNA sequencing of fungal networks, and imaging techniques. Insights inform forest management, crop diversification, and restoration, highlighting the importance of belowground connectivity for ecosystem health.

See also: mycorrhizal network, root system, rhizosphere.