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Proceedings of the International Academy of Ecology and Environmental Sciences, 2023, 13(3): 111-125
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Article

Dynamics of soil CO2 efflux in three tropical dry deciduous forests of Central Indian landscape

Javid Ahmad Dar1,2, Debojyoti Raha2, Subashree Kothandaraman3, Manzoor Hassan Malik1, Najeeb Ahmad Bhat4, Mohammed Latif Khan2
1Terrestrial Ecology and Modelling Lab (TEaM Lab), Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University, Andhra Pradesh, 522502, India
2Department of Botany, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, Madhya Pradesh, 470003, India
3Spatial Analysis and Modelling (SAM) Laboratory, Centre for Ocean, River, Atmosphere and Land Sciences (CORAL), Indian Institute of Technology Kharagpur, West Bengal, 721302, India
4Govt Degree College Bandipora, J and K Higher Education Department, 193502, Indian Institute of Technology Kharagpur, West Bengal, 721302, India

Received 4 April 2023;Accepted 10 May 2023;Published online 20 May 2023;Published 1 September 2023
IAEES

Abstract
Dynamics of soil CO2 efflux in tropical dry deciduous forests is imperative to know their contribution in regulating the regional and global carbon (C) cycles. In this study, three forest types: dry deciduous teak (DDTF), dry deciduous mixed (DDMF) and Boswellia (BF) forests were selected to measure the dynamics of soil CO2 efflux and its driving factors. Significantly (p < 0.001) higher mean monthly CO2 efflux was recorded in DDMF (626.1 ¡À 9.1 mg CO2/m2/h) while it was lowest in BF (122.3 ¡À 5.0 mg CO2/m2/h) and DDTF (142.8 ¡À 6.9 mg CO2/m2/h) forest types, respectively. The CO2 efflux peaked during the rainy season (mean 551.1 ¡À 63.5 mg CO2/m2/h, DDMF) followed by summer (363.7 ¡À 68.6 mg CO2/m2/h, DDTF) and the lowest in winter (181.8 ¡À 36.3 mg CO2/m2/h, BF) season. Significantly (p < 0.05) lower soil temperature (TS) and higher soil moisture (MS) content were observed in BF and DDMF forest types, respectively. The cumulative annual soil CO2 efflux was highest in DDMF (4625.2 mg CO2/m2/yr) and lowest in BF (3536.7 mg CO2/m2/yr). Soil CO2 efflux was significantly positively correlated with TS (R2 = 0.49), MS (R2 = 0.59). This study will provide an understanding of the dynamics of soil CO2 efflux among tropical dry deciduous forest types in the Central Indian landscape and identify the roles of different drivers in soil CO2 efflux.

Keywords soil CO2 efflux;seasonal dynamics;soil moisture;tropical dry deciduous forests;Central India.


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