Carbon stocks and productivity of mangrove forests in Tanzania

Njana, Marco Andrew; Zahabu, Eliakimu; Malimbwi, R. E.

doi:10.2989/20702620.2017.1334314

Cited by 21 publications

(21 citation statements)

References 57 publications

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“…The estimated BGB values for the different height classes of scrub mangrove forest are within the range of values reported for mangrove forests at other localities (Table 5), such as the Everglades National Park (24-47 Mg ha -1 ) and Rookery Bay (29-284 Mg ha -1 ), both in Florida, in the United States [24,25], and the Endings Lagoon (9.8 Mg ha -1 ) in Mexico [75]. Although a number of studies have provided estimates of the BGB of non-scrub mangrove forests in different parts of the world [23,[76][77][78][79][80], data are still relatively scarce overall. Even so, broad comparisons show that our values are higher than the estimates available from the vast majority (89%) of sites in the 71 countries that have mangrove forests [81], as well as the mean value of approximately 27 Mg ha -1 estimated for other types of forest around the world [82].…”

Section: Plos Onementioning

confidence: 99%

Biomass and carbon estimation for scrub mangrove forests and examination of their allometric associated uncertainties

et al. 2020

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Reliable estimates of biomass and carbon storage are essential for the understanding of the environmental drivers and processes that regulate the productivity of scrub forests. The present study estimated total (above-ground, AGB + below-ground, BGB) biomass and carbon storage of a scrub forest dominated by Avicennia germinans (L.) L. based on the existing allometric models for the AGB, while novel models were developed to estimate the BGB. Data collection followed a destructive approach by using the "sampling method", from 45 trees divided into three height classes. Tree height and diameter were used to estimate the BGB of these forests, providing more accurate estimates of their biomass. Our findings indicate the existence of a direct relationship with increasing topography and interstitial salinity, which result in an increase in the percentage contribution of the AGB. By contrast, increasing topography also led to reduction in tree height and contribution of the BGB, although this compartment represents approximately half of the total biomass of these forests. The contribution of BGB estimates increased from 43 to 49.5% from the lowest to the highest height class and the BGB and AGB values reached approximately 87 Mg ha-1 (48.6%) and 91.7 Mg ha-1 (51.4%), respectively. The estimates of the biomass and carbon stocks of scrub mangroves vary considerably worldwide, which reflects the uncertainties derived from the application of distinct sampling methods. Specific models developed for each height class should be considered instead generalist models to reduce the general uncertainties on the production and distribution of biomass and the storage of carbon. Overall, our results overcome a major lacuna in the development of allometric equations to estimate the production of BGB and the storage of carbon by scrub mangrove forests, contributing to the refinement of the total biomass estimates for this type of mangrove forest.

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Section: Plos Onementioning

confidence: 99%

Biomass and carbon estimation for scrub mangrove forests and examination of their allometric associated uncertainties

et al. 2020

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“…In most developing countries of Africa including Tanzania in particular, the forests can play an important role in achieving broader climate change mitigation goals. One of the options being considered to mitigate the rise of CO 2 in the atmosphere is the use of forests reserves and establishment of forest conservation strategies (Lasco et al, 2002;Njana et al, 2018;Paudel et al, 2019;Pearson et al, 2005). The recognition of the role of forest and its components such as trees, herbs and soils in reducing the emission of carbon is more valuable (Montagnini and Nair, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…The main forestry strategies aimed at mitigating climate change through reforestation; avoid deforestation and degradation; maintain or increase the carbon density of existing forests; encourage the use of forest products, thereby improving carbon storage, and increasing the use of bioenergy to substitute fossil fuels (Kurz et al, 2016). Deforestation and forest degradation result in emissions of CO 2 , which contribute to climate change, loss of carbon sequestration capacity, loss of invaluable ecosystem services and possibly loss of tree species (Njana et al, 2018). Forest productivity is important in mitigation of climate change due to its capacity to sequester CO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Mangroves forestry (Njana et al, 2018) as well as conservation and management (Chirwa, 2014;Duguma et al, 2019;Malunguja and Devi, 2020;Monela et al, 2005;Otsyina et al, 2008;Pye-Smith, 2010;Rubanza et al, 2006;Selemani et al, 2013). However, the community reserved forests receive little emphases on the study of C storage and sequestration concerning climate change mitigation.…”

Section: Introductionmentioning

confidence: 99%

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Climate change mitigation through carbon dioxide (CO2) sequestration in community reserved forests of northwest Tanzania

Malunguja

Devi

Kilonzo

et al. 2020

Arch. Agric. Environ. Sci.

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Forests play a key role in climate change mitigation through sequestering and storing carbon dioxide from the atmosphere. However, there is inadequate information about carbon accumulation and sequestered by community reserved forests in Tanzania. A study was carried to quantify the amount of carbon sequestered in two forests namely; Nyasamba and Bubinza of Kishapu district, northwestern Tanzania. A ground-based field survey design under a systematic sampling technique was adopted. A total of 45 circular plots (15 m radius) along transects were established. The distances between transect and plots were maintained at 550 and 300 m, respectively. Data on herbaceous C stocking potential was determined using destructive harvest method while tree carbon stocking was estimated by allometric equations. The collected data were organized on excel datasheet followed by descriptive analysis for quantitative information using Computer Microsoft Excel and SPSS software version 20, while soil samples were analyzed based on the standard laboratory procedures. Results revealed higher carbon sequestration of 102.49±39.87 and 117.52±10.27 for soil pools than plants both herbaceous (3.01±1.12 and 6.27±3.79 t CO2e/yr) and trees (5.70±3.15 and 6.60±2.88 t CO2e/yr) for Nyasamba and Bubinza respectively. The study recorded a potential variation of soil carbon sequestration, which varied across depths category (P < 0.05). However, there was no difference across sites (P >0.05) and species (P > 0.05) for herbaceous and trees. The findings of this study portrayed a significantly low value for carbon stocking and sequestration potential for enhanced climate change mitigation. Therefore, proper management of community reserved forest is required to accumulate more C for enhancing stocking potential hence climate change mitigation through CO2 sequestration offsets mechanism.

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“…The adaptative architecture of trees in tropical forests has been examined in successive (Chazdon 1986;Givnish 1982). The research on adaptative architecture of trees on mangrove forest in tropical does not exist yet, but has done a lot of research on the distribution of carbon stocks, and productivity of mangrove forest (see Camacho et al 2011;Fatoyinbo and Simard 2013;Sitoe et al 2014;Taberima et al 2014;Sahu et al 2016;Njana et al 2017). The research on adaptive architecture of tree in the temperate regions has also been done (see Horn 1971;Nicola and Pickets 1983;Ehlesinger and Kenneths 1986;Ardhana et al 1988).…”

Section: Introductionmentioning

confidence: 99%

The distribution of vertical leaves and leaves biomass on ten mangrove species at Ngurah Rai Forest Park, Denpasar, Bali, Indonesia

Ardhana

Rimbawan²,

Cahyo³

et al. 2018

Biodiversitas

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Ardhana IPG, Rimbawan IMGS., Cahyo PN, Fitriani Y, Rohani S. 2018. The distribution of vertical leaves and leaves biomass on ten mangrove species at Ngurah Rai Forest Park, Denpasar, Bali, Indonesia. Biodiversitas 19: 918-926. The distribution of vertical leaves and leaves biomass which forms the mangrove crown divides into three parts, namely the top part, the middle part, and the bottom part. Total amount leaves on any parts are highly variable depending on height of each species. The relationship between the height of tree with the crown thickness depended on total leaves of each crown on each species as well as the relationship between the total leaves biomass of each crown on each species, with the height and volume of tree stems, also has variation on each mangrove species. Author examined the relationship between the photosynthetic organs with non-photosynthetic organs, especially on stems in each species. The high total amount of leaves and large total amount leaves biomass deeply is depended on diameter and growth height which are presented in the form of stem volumes. On the relationship between the photosynthetic organs and non-photosynthetic organs on each mangrove species, also has been examined. The higher total amount of leaves or the total amount of leaves biomass largely depended on the stem volume of mangroves. This indicates that the production of photosynthetic organ either in the form of the total amount of leaves or the total amount of leaves biomass serve to support growth of the stem mangrove trees (height of stem, diameter of stem and volume of stem).

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Carbon stocks and productivity of mangrove forests in Tanzania

Cited by 21 publications

References 57 publications

Biomass and carbon estimation for scrub mangrove forests and examination of their allometric associated uncertainties

Biomass and carbon estimation for scrub mangrove forests and examination of their allometric associated uncertainties

Climate change mitigation through carbon dioxide (CO2) sequestration in community reserved forests of northwest Tanzania

The distribution of vertical leaves and leaves biomass on ten mangrove species at Ngurah Rai Forest Park, Denpasar, Bali, Indonesia

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