Recovery of tropical moist deciduous dipterocarp forest in Southern Vietnam

T., Ha T.; Grant, John C.; Bon, Trinh Ngoc; Zimmer, Heidi C.; Tran, Lam Dong; Nichols, J. Doland

doi:10.1016/j.foreco.2018.10.062

Cited by 14 publications

(8 citation statements)

References 125 publications

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“…Tropical lowland rainforest occupies the largest area at low elevations, while tropical deciduous monsoon rainforest occurs in drought and hot habitats. In the previous studies, we found that the species are characterized by deciduous species in tropical deciduous monsoon rainforest and by evergreen in the tropical lowland rainforest [16][17][18]. Liu [14] found that both the richness and abundance of deciduous species in the tropical deciduous monsoon rainforest were higher than those in the tropical lowland rainforest.…”

Section: Introductionmentioning

confidence: 99%

Effects of Above- and Below-Ground Interactions of Plants on Growth of Tree Seedlings in Low-Elevation Tropical Rainforests on Hainan Island, China

Zang

Yue

et al. 2021

Forests

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Understanding the effects of above- and below-ground interactions on seedling growth is pivotal for identifying the key drivers of secondary forest succession. However, it is still unclear whether the effects of above- and below-ground interactions of plants are consistent for seedling growth of deciduous and evergreen species. There are two types of broadleaved forests (i.e., tropical lowland rainforest and tropical deciduous monsoon rainforest) in the low-elevation (<800 m) areas of Hainan Island in China. Here, 32 seedling transplanting plots (1 × 1 m2) were established in the tropical lowland rainforest and the tropical deciduous monsoon rainforest, respectively. Four treatments (each with 16 replicates) were carried out to reduce above- and below-ground interactions of plants in the low-elevation forests: removal of vegetation (R), root trenching (T), removal of vegetation and root trenching (R + T), and no vegetation removal or trenching (as the control) (C). Seedlings of four deciduous species and four evergreen species were planted to observe their performance in the experiments. The relative growth rates (RGR) of the seedlings were measured to distinguish the relative effects of above- and below-ground interactions. The photosynthetically active radiation (PAR) was measured as a proxy for above-ground interaction and the root biomass was used as a proxy for below-ground interaction. The relationships between seedling RGR and PAR/root biomass were examined. Results showed that: (1) R and R+T treatments significantly increased the seedlings RGR, but T treatment had no effect on the RGR; (2) the growth rates of deciduous species were greater than those of the evergreen species; and (3) seedling growth rates were increased with more PAR. Our study suggests that above-ground vegetation removal had a stronger effect than trenching on the growth and assembly of tree seedlings in the low-elevation tropical rainforests.

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Section: Introductionmentioning

confidence: 99%

Effects of Above- and Below-Ground Interactions of Plants on Growth of Tree Seedlings in Low-Elevation Tropical Rainforests on Hainan Island, China

Zang

Yue

et al. 2021

Forests

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“…In the field surveys, together with the determination of vegetation structure (layers / abundance species) and forage species along the transects, we also cut the grasses on the plot to calculate feeding productive for each habitat in each season [7]. Besides that, we also reviewed and cited some documents and materials related to the grazing, livestock development, vegetation structure and vegetation succession of the locality includes An Khe [11], Ban Me Thuot [12], Yok Don National Park [13] and Kon Ka Kinh National Park [14,15], scrubs as upland rice field in the CH [16], deciduous forests [17] or natural forage species found in the study area as M'Drak [7] and the bioclimatic scheme of study area [18], water resources of study area [19]. The grazing vegetation classification in this paper based on Tropical Ecological Systems in Vietnam [8].…”

Section: Methods Materials and Objectivesmentioning

confidence: 99%

Ecological Characteristic of Grazing Vegetation and Capacity Food for the Large Cattle in Central Highland, Vietnam

Tai¹,

Van²,

Tuan³

et al. 2021

EES

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The Highland Central of Vietnam has a high potential for livestock development with a vast area of grazing areas include scrubs, grassland and some forest types but currently, the livestock of the Central Highland has been facing with a problem as long period of dry season as 4-6 months that make most of the plant communities stop growing. To contribute to the livestock development of the Central Highland, in this study, we focus on the ecological characteristics of the natural vegetation to gather experiences about the structure, seasonal rhythm and succession trend of each plant communities related to grazing. Therefore, in this paper, the ecological characteristics of 11 natural ecological habitats and 1 artificial habitat are descripted; natural grazing vegetation includes 5 forests, 3 scrubs and 3 grasslands belonging to 3 bio-climate types (tropical monsoon moisture, tropical monsoon dry and sub-tropical monsoon moisture) and 3 ecological canopy types (evergreen, semi-deciduous and deciduous). The seasonal rhythm of each ecosystem also affects to the food resources for the cattle, among that, the main food was found in dry grasslands and scrubs in the rainy season but in the dry season those habitats have support food not considerable, the cattle would get food from the moisture habitats in this period. The largest changes of food source ratios between rainy and dry seasons were found in Dak Lak and Gia Lai provinces, where the dry habitats are common while the changing ratios at Kon Tum and Lam Dong provinces have been not much that means two provinces would support food for the large cattle stability during the year. However, when the density of the cattle head is too high, the capacity of the habitat is lower than the requirement of the animal, especially in the dry season, the natural food sources cannot adapt for the cattle food requirement and the people must use the other sources such as planting, industrial food. The density of the cattle also effects on the ecological succession trend of each habitat. In normally, the forest would be changed to the scrubs, the scrubs would be changed to the grassland and vice versa. In the first trend, it is positive but the second trend is negative. Because of high density of cattle, the negative ecological succession within the natural vegetation related to the grazing in the Central Highland has been found at the western area of Dak Lak and Gia Lai provinces, most areas of Kon Tum and Dak Nong provinces except the habitat along the boundary of the special used forest (national park, nature reserves) and the positive succession would be found at all of the special used forest areas, Lam Dong province, Southeastern area of Dak Lak province, Central areas of Gia Lai province.

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“…This approach was tested in Vietnam on a 12,000-ha plot managed by the Nhung Mien Forest Management Unit, where 4103 shrimp farmers received training in organic shrimp growing. These comprised 1150 farmers that collectively covered 6972 ha and signed contracts agreeing to keep a mangrove cover of at least 50% in their respective farms [100][101][102]. About 553 shrimp farmers have been certified by the Nhung Mien Forest Management Unit [32].…”

Section: The Bonn Challenge Illustrative: Case Studymentioning

confidence: 99%

The Societal and Economic Impact of Reforestation Strategies and Policies in Southeast Asia—A Review

Ahmadzai

Zaki

Ismail

et al. 2022

Forests

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This paper assesses the existing reforestation and forest conservation policies and strategies in Southeast Asia and how they have impacted people’s lives. Southeast Asia contains 11 countries and is home to 20% of the world’s species. Unfortunately, the region has been practising deforestation at an alarming rate. The main cause of deforestation in the region is the creation of land for agriculture, with forest fires and the growing demand for timber also contributing. As a result, the region has lost 376,000 km2 of forest in the last 30 years. Parts of the region have been involved in international efforts to protect forests, such as the 2016 Paris Agreement. However, some of these policies have not made much difference because most countries are not willing to support the necessary strategies. From the study findings, the main strength of the existing polices and strategies is that they are being amended to suit different changes in demographics and the practical needs of the sector. The sector has been able to shift from the initial state forestry management to making forests a multi-sectoral economic development agent. On the other hand, there are few polices at the national level that ensure every citizen participates in tree planting and that they understand the need to stop deforestation. In addition, many countries in the region are less willing to join the international communities in fighting climate change; that is, they do not agree with international partnerships like the Pris Climate Change Agreement.

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Recovery of tropical moist deciduous dipterocarp forest in Southern Vietnam

Cited by 14 publications

References 125 publications

Effects of Above- and Below-Ground Interactions of Plants on Growth of Tree Seedlings in Low-Elevation Tropical Rainforests on Hainan Island, China

Effects of Above- and Below-Ground Interactions of Plants on Growth of Tree Seedlings in Low-Elevation Tropical Rainforests on Hainan Island, China

Ecological Characteristic of Grazing Vegetation and Capacity Food for the Large Cattle in Central Highland, Vietnam

The Societal and Economic Impact of Reforestation Strategies and Policies in Southeast Asia—A Review

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