Category: Ecology

Summary: Estimating when methane-shuttle coupling creates an interface-spanning reactive mode across oxidizing, microoxic, and methanogenic peatland layers instead of staying surface- or deep-confined.

Methane emissions from peatlands depend on how surface oxidation, deep methanogenesis, plant-mediated gas transport, and redox stratification interact across depth. This experiment asks when stronger methane-shuttle coupling reorganizes the dominant reactive mode so that it spans the oxic surface, the microoxic transition zone, the deep anoxic layer, and vascular transport pathways.

The code builds dense non-symmetric microbial-community matrices for layered peatland systems and uses iterative deepening with repeated eigenanalysis to bisect the coupling threshold across sizes from N=64 to 2048. The goal is to identify when the leading mode becomes interface-localized across layers, rather than remaining trapped near the surface or in deep methanogenic regions.

That matters because peatland methane flux is controlled by cross-layer feedback, not by any one layer in isolation. The docstring presents this as a dense finite-size threshold map for a bridge-like reactive takeover mode that has not been systematically charted in the existing peatland process-model literature.

Method: Dense non-symmetric eigenanalysis with iterative deepening and bisection on methane-shuttle coupling in layered peatland community matrices.

What is measured: Critical methane-shuttle threshold, interface-localized reactive-mode structure, surface versus deep confinement, and bracket width.