TY JOUR TI AN ECOSYSTEM APPROACH TO TOURISM SERVICES DEVELOPMENT: CONCEPTUAL FOUNDATIONS AND APPLICATION FEATURES IN THE REGIONAL ECONOMY KW service ecosystem KW tourism services KW service economy KW regional economy KW ecosystem approach KW platform KW coordination KW tourism destination KW service interactions JO Trade, service, food industry AU Petrichsheva, N.Y. PY 2025 IS 5 PB Siberian Federal University