title: Multivariate statistical approach to identify significant sources influencing the physico-chemical variables in Aerial Bay, North Andaman, India.
abstract: Aerial Bay is one of the harbor towns of Andaman and Nicobar Islands, the union territory of India. Nevertheless, it is least studied marine environment, particularly for physico-chemical assessment. Therefore, to evaluate the annual spatiotemporal variations of physico-chemical parameters, seawater samples collected from 20 sampling stations covering three seasons were analyzed. Multivariate statistics is applied to the investigated data in an attempt to understand the causes of variation in physico-chemical parameters. Cluster analysis distinguished mangrove and open sea stations from other areas by considering distinctive physico-chemical characteristics. Factor analysis revealed 79.5% of total variance in physico-chemical parameters. Strong loading included transparency, TSS, DO, BOD, salinity, nitrate, nitrite, inorganic phosphate, total phosphorus and silicate. In addition, box-whisker plots and Geographical Information System based land use data further facilitated and supported multivariate results.
authors: Andaman and Nicobar Centre for Ocean Science and Technology, Earth System Sciences Organization (ESSO) - National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Port Blair 744103, India. Electronic address: dilipjhaniot@gmail.com.
authors: Dilip Kumar
authors: DK
authors: Jha
authors: Andaman and Nicobar Centre for Ocean Science and Technology, Earth System Sciences Organization (ESSO) - National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Port Blair 744103, India.
authors: N V
authors: NV
authors: Vinithkumar
authors: Andaman and Nicobar Centre for Ocean Science and Technology, Earth System Sciences Organization (ESSO) - National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Port Blair 744103, India.
authors: Biraja Kumar
authors: BK
authors: Sahu
authors: Andaman and Nicobar Centre for Ocean Science and Technology, Earth System Sciences Organization (ESSO) - National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Port Blair 744103, India.
authors: Apurba Kumar
authors: AK
authors: Das
authors: Andaman and Nicobar Centre for Ocean Science and Technology, Earth System Sciences Organization (ESSO) - National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Port Blair 744103, India.
authors: P S
authors: PS
authors: Dheenan
authors: Andaman and Nicobar Centre for Ocean Science and Technology, Earth System Sciences Organization (ESSO) - National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Port Blair 744103, India.
authors: P
authors: P
authors: Venkateshwaran
authors: Andaman and Nicobar Centre for Ocean Science and Technology, Earth System Sciences Organization (ESSO) - National Institute of Ocean Technology (NIOT), Ministry of Earth Sciences, Port Blair 744103, India.
authors: Mehmuna
authors: M
authors: Begum
authors: Department of Ocean Studies and Marine Biology, Pondicherry University, Port Blair 744103, India.
authors: T
authors: T
authors: Ganesh
authors: Department of Environmental Management, School of Environmental Sciences, Bharathidasan University, India.
authors: M
authors: M
authors: Prashanthi Devi
authors: Ocean Science and Technology for Islands, ESSO - NIOT, Ministry of Earth Sciences (Govt. of India), Chennai 600100, India.
authors: R
authors: R
authors: Kirubagaran
mesh_terms: D000704:Analysis of Variance; D061006:Bays; D016000:Cluster Analysis; D004784:Environmental Monitoring / Q000379:methods*; D005163:Factor Analysis, Statistical; D007194:India; D015999:Multivariate Analysis; D009566:Nitrates / Q000032:analysis*; D009573:Nitrites / Q000032:analysis; D009792:Oceans and Seas; D010710:Phosphates / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D025341:Principal Component Analysis; D054712:Salinity; D012621:Seasons; D012623:Seawater / Q000032:analysis*; D017640:Silicates / Q000032:analysis
chemical_list: D009566:Nitrates; D009573:Nitrites; D010710:Phosphates; D017640:Silicates; D010758:Phosphorus
keywords: Aerial Bay; Multivariate; North Andaman; Nutrients; Physico-chemical