Analysis of Mangrove Stress Levels Using the NDRE Index and SPAD Chlorophyll Sensor in the Air Telang Mangrove Reserve: Analisis Tingkat Stres Mangrove Menggunakan Pendekatan Indeks NDRE dan Sensor SPAD di Kawasan Hutan Lindung Air Telang. Journal of Global Sustainable Agriculture, v. 5, n. 3, p. 189–197, 4 Sep.2025.