scholarly journals Carbon Stocks in the Small Estuarine Mangroves of Geza and Mtimbwani, Tanga, Tanzania

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Edmond Alavaisha ◽  
Mwita M. Mangora
Keyword(s):  
Soil Carbon ◽  
Stand Structure ◽  
High Capacity ◽  
Stand Density ◽  
Carbon Stocks ◽  
Forest Stand ◽  
Ecological Resilience ◽  
Mangrove Forests ◽  
Mangrove Species ◽  
Forest Stand Structure

Mangrove forests offer important ecosystem services, including their high capacity for carbon sequestration and stocking. However, they face rapid degradation and loss of ecological resilience particularly at local scales due to human pressure. We conducted inventory of mangrove forests to characterise forest stand structure and estimate carbon stocks in the small estuarine mangroves of Geza and Mtimbwani in Tanga, Tanzania. Forest structure, above-ground carbon (AGC), and below-ground carbon (BGC) were characterised. Soil carbon was estimated to 1 m depth using loss on ignition procedure. Six common mangrove species were identified dominated byAvicennia marina(Forsk.) Vierh. andRhizophora mucronataLamarck. Forest stand density and basal area were 1740 stems ha−1and 17.2 m2 ha−1for Geza and 2334 stems ha−1and 30.3 m2 ha−1for Mtimbwani. Total ecosystem carbon stocks were 414.6 Mg C ha−1for Geza and 684.9 Mg C ha−1for Mtimbwani. Soil carbon contributed over 65% of these stocks, decreasing with depth. Mid zones of the mangrove stands had highest carbon stocks. These data demonstrate that studied mangroves are potential for carbon projects and provide the baseline for monitoring, reporting, and verification (MRV) to support the projects.

scholarly journals Effect of structure and dynamics of forests on the occurrence of Erythronium dens-canis

2020 ◽  
Vol 66 (No. 9) ◽  
pp. 349-360
Author(s):  
Stanislav Vacek ◽  
Rostislav Linda ◽  
Ivo Králíček ◽  
Karel Vančura ◽  
Anna Prokůpková ◽  
...  
Keyword(s):  
Stand Structure ◽  
Basal Area ◽  
Stand Density ◽  
European Beech ◽  
Forest Stand ◽  
Beech Forests ◽  
Spruce Forests ◽  
Forest Stand Structure ◽  
Stand Density Index ◽  
The Impact

The paper presents the results of a study on the impact of forest stand structure and development in 1998 to 2018 on the occurrence of dog’s tooth violets (Erythronium dens-canis L.) in the Medník National Nature Monument, Czech Republic. The research was carried out in mixed European hornbeam and sessile oak stands, herb-rich European beech stands and the Sázava-river Norway spruce ecotype stands. The site and stand characteristics of the following three forest stand types were compared: 1) oak-hornbeam forests, 2) herb-rich beech forests and 3) secondary spruce forests. The results showed that the ratio of sterile and fertile plants was 2.9 to 1. The occurrence of E. dens-canis was higher in older stands with differentiated structure. On the contrary, stands characterized by a higher number of trees and basal area negatively affected the population size of E. dens‑canis. Significantly, the density of E. dens-canis decreased with increasing stand density index (SDI) and increased with increasing diameter differentiation index in relation to tree neighbours (TM<sub>d</sub>). During the period of 20 years, the E. dens-canis population increased by 40.4% on permanent research plots, while the highest changes were observed on spruce plots (+92.1%) and the lowest increase was in oak-hornbeam forests (+18.0%). The highest numbers of E. dens-canis plants were found in herb-rich beech forests (1 774 plants·ha<sup>–1</sup>), lower numbers occurred in oak-hornbeam forests (784 plants·ha<sup>–1</sup>) and minimal in secondary spruce forests (51 plants·ha<sup>–1</sup>). <br /><br />

scholarly journals Assessing Wood and Soil Carbon Losses from a Forest-Peat Fire in the Boreo-Nemoral Zone

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 880
Author(s):  
Andrey Sirin ◽  
Alexander Maslov ◽  
Dmitry Makarov ◽  
Yakov Gulbe ◽  
Hans Joosten
Keyword(s):  
Soil Carbon ◽  
Stand Structure ◽  
Peat Soil ◽  
Burned Area ◽  
Tree Biomass ◽  
Carbon Loss ◽  
Forest Stand Structure ◽  
Peat Fire ◽  
Peat Fires ◽  
Carbon Losses

Forest-peat fires are notable for their difficulty in estimating carbon losses. Combined carbon losses from tree biomass and peat soil were estimated at an 8 ha forest-peat fire in the Moscow region after catastrophic fires in 2010. The loss of tree biomass carbon was assessed by reconstructing forest stand structure using the classification of pre-fire high-resolution satellite imagery and after-fire ground survey of the same forest classes in adjacent areas. Soil carbon loss was assessed by using the root collars of stumps to reconstruct the pre-fire soil surface and interpolating the peat characteristics of adjacent non-burned areas. The mean (median) depth of peat losses across the burned area was 15 ± 8 (14) cm, varying from 13 ± 5 (11) to 20 ± 9 (19). Loss of soil carbon was 9.22 ± 3.75–11.0 ± 4.96 (mean) and 8.0–11.0 kg m−2 (median); values exceeding 100 tC ha−1 have also been found in other studies. The estimated soil carbon loss for the entire burned area, 98 (mean) and 92 (median) tC ha−1, significantly exceeds the carbon loss from live (tree) biomass, which averaged 58.8 tC ha−1. The loss of carbon in the forest-peat fire thus equals the release of nearly 400 (soil) and, including the biomass, almost 650 tCO2 ha−1 into the atmosphere, which illustrates the underestimated impact of boreal forest-peat fires on atmospheric gas concentrations and climate.

scholarly journals Forest stand structure and coarse woody debris determine the biodiversity of beetle communities in Mediterranean mountain beech forests

2021 ◽  
pp. e01637
Author(s):  
Francesco Parisi ◽  
Michele Innangi ◽  
Roberto Tognetti ◽  
Fabio Lombardi ◽  
Gherardo Chirici ◽  
...  
Keyword(s):  
Coarse Woody Debris ◽  
Stand Structure ◽  
Woody Debris ◽  
Forest Stand ◽  
Beech Forests ◽  
Forest Stand Structure

Traditional silvopastoral management and its effects on forest stand structure in northern Zagros, Iran

2014 ◽  
Vol 327 ◽  
pp. 221-230 ◽  
Author(s):  
Ahmad Valipour ◽  
Tobias Plieninger ◽  
Zahed Shakeri ◽  
Hedayat Ghazanfari ◽  
Manouchehr Namiranian ◽  
...  
Keyword(s):  
Stand Structure ◽  
Forest Stand ◽  
Forest Stand Structure

Accuracy of small footprint airborne LiDAR in its predictions of tropical moist forest stand structure

2012 ◽  
Vol 125 ◽  
pp. 23-33 ◽  
Author(s):  
G. Vincent ◽  
D. Sabatier ◽  
L. Blanc ◽  
J. Chave ◽  
E. Weissenbacher ◽  
...  
Keyword(s):  
Stand Structure ◽  
Forest Stand ◽  
Airborne Lidar ◽  
Forest Stand Structure ◽  
Moist Forest ◽  
Small Footprint
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