Carbon Sequestration in Tropical and Subtropical Plant Species in Collaborative and Community Forests of Nepal

Abstract

Different plant species have different capacity of carbon sequestration but it is not assessed yet in Nepal. Therefore, this study was done to assess the species-wise carbon sequestration in two periods in forests. Three collaborative and three community forests were selected for the study. The selected forests were surveyed using GPS and mapped and stratified into tree, pole, and regeneration. Specifically 32, 33, and 31 samples were collected from Banke-Maraha, Tuteshwarnath, and Gadhanta-Bardibash collaborative forests, respectively, while 30, 25, and 22 samples were collected from Chureparwati, Buddha, and Chyandanda community forests correspondingly. The sample plots were of 25 m × 20 m for tree strata. The diameter and height of plants were measured and samples were collected for three consecutive years. The estimated carbon stock of Shorea robusta was the highest 35.93 t ha−1 in 2011 which was slightly decreased to 34.43 t ha−1 in 2012 and reached 32.02 t ha−1 in 2013 in Banke-Maraha collaborative forest but it was the least 7.97, 8.92, and 10.29 t ha−1 in 2011, 2012, and 2013, respectively, in Chyandanda community forest. The highest carbon sequestration was recorded about 5.02 t ha−1 of Shorea robusta in Chyandanda community forest in between t2013 and t2012.

Estimation of Carbon Stock in the Regenerating Tree Species of the Intact and Disturbed Forest Sites in Tanzania

“…The variation of carbon stock across different species in this study shows that different plant species have different capacity to sequestrate carbon during photosynthesis supporting the findings in [32]. Although in this study we have used the generalized allometric equations to quantify carbon stock for all the thirty-three species, interestingly, the computed values of carbon in our study area are within that reported in other studies like [9,25,73,65], but they are contrary to the values reported in [32]. These contradicting findings might result from variation of species , location, age of the tree and methods of quantifying carbon stocks [32].…”

“…Carbon loss in forests ecosystems are the outcomes of anthropogenic activities [8,25]. Deforestation and degradation of terrestrial forest ecosystems are the main factors for the loss of carbon in the tropical forests [25,31,32]. Deforestation, degradation, and poor forest management reduce the capacity of forests ecosystems to store carbon [33].…”

“…Deforestation, degradation, and poor forest management reduce the capacity of forests ecosystems to store carbon [33]. These activities bring the so called anthropogenic causes of global warming [6,32]. The loss of carbon is based on the fact that disturbances affect the structure of forests including the type, size, age, species stand and species diversity, the parameters, which are directly associated in the storage of carbon in forest ecosystems [10,12,34].…”

“…The loss of carbon is based on the fact that disturbances affect the structure of forests including the type, size, age, species stand and species diversity, the parameters, which are directly associated in the storage of carbon in forest ecosystems [10,12,34]. Also, disturbances in forest affect the belowground carbon stock that include soil, litter and roots [32,35,36]. Although, documentation shows that the below ground carbon sink of trees harbors larger quantities of carbon, this sink capacity is limited by many factors such as the magnitude of historic carbon loss, higher rate of decomposition because of change in climate, and different land uses and management [23,37].…”

Serapan Karbon Hutan Tanaman Krasikarpa pada Lahan Basah di Kabupaten Ogan Komering Ilir Sumatera Selatan

“…Besarnya serapan karbon melalui pertumbuhan dan akumulasi biomassa ditentukan oleh sifat pertumbuhan, kondisi lahan, serta kecocokan antara jenis yang dikembangkan dengan kondisi lahan pengembangannya (Mandal, Jha, Dutta, Thapa, & Karmacharya, 2016). Krasikarpa merupakan salah satu jenis yang dipilih untuk ditanam pada lahan basah, baik pada tipe lahan endapan liat (marine clay) maupun lahan gambut, karena jenis ini tergolong jenis cepat tumbuh dan adaptif pada lahan basah.…”