BioticCoupling names the condition through which a field survives by entering metabolic dependency with adjacent ecologies: disciplines, platforms, readers, institutions, repositories, citation networks, classrooms, and technical systems. Within Socioplastics, no corpus is sovereign; it breathes through exchange, drawing nutrients from external formations while returning concepts, protocols, residues, and waste into them. A term cited in urban policy, embedded in a syllabus, indexed by a repository, or invoked through an API is not merely circulated; it is coupled. Yet coupling without regulation may become parasitism, dilution, or disorder. LateralGovernance supplies the horizontal protocol through which dependencies are managed without vertical command. It operates by calibration rather than control, allowing concepts to be adapted differently across archive theory, energy policy, pedagogy, or urban analysis without treating divergence as failure. MaterialTrace then grounds these relations in evidence: the DOI resolve, PDF download, annotated page, Zotero timestamp, server log, syllabus citation, sticky note, or governmental reference marks an event of contact without fully narrating it. A specific research-platform case clarifies the triad: when a socioplastic node moves from repository to classroom, from citation manager to policy report, and from diagram to marginal annotation, its ecological life becomes readable through the traces each coupling leaves behind. Together, BioticCoupling maps dependency, LateralGovernance mediates relation without domination, and MaterialTrace verifies that contact has occurred. A field with coupling but no trace becomes rumour; with trace but no governance becomes extraction; with governance but no coupling becomes administration without life. Socioplastics endures not as autonomy, but as ecological responsibility.