Fujian cypress and two other threatened tree species in three conservation zones of a nature reserve in north-western Vietnam

Dao, Thi Hoa Hong; Hölscher, Dirk

doi:10.1186/s40663-017-0116-9

Cited by 7 publications

(6 citation statements)

References 32 publications

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“…The ecology protection red line is an important innovation in Chinese ecological construction. China is the first country in the world to apply the ecology protection red line theory to national ecological management [11]. The ecology protection red line is similar to the protected area system, national park system, and natural reserve network [12].…”

Section: Introductionmentioning

confidence: 99%

Defining Important Areas for Ecosystem Conservation in Qinghai Province under the Policy of Ecological Red Line

Chen

Xiao

et al. 2023

Sustainability

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Delimiting important ecological conservation areas is critical for ecological integrity, sustainability of the ecological service function, and management of environmental degradation. However, the process of defining important areas for ecological protection purposes is elusive, especially in the Qinghai Province of China, which is home to unique ecosystems. To address this issue, we selected biodiversity (endangered mammals, birds, and plants), soil retention, water storage, and carbon sequestration to define and delimit important areas for the protection of these ecosystem functions. We found that the important endangered birds of Qinghai Province were mainly distributed in the eastern and southern parts, while important endangered plants were relatively centralized, with relatively high distribution in the Golog of Qinghai Province. The total amounts were 2.245 billion tons, 46.513 billion m3, and 60.91 Tg for soil retention, water storage, and carbon sequestration in Qinghai ecosystems, respectively. Soil retention and carbon sequestration presented a similar trend, with high levels in the eastern and low levels in the western parts of Qinghai, while water storage was higher in the south than in the north. Among various ecosystem types, the grassland ecosystem was the main body of soil retention, water retention, and carbon sequestration; soil retention, water retention, and carbon sequestration were quite small in the desert, town, and city ecosystems. By evaluating the spatial distribution of the service functions of ecosystems, we found that extremely important areas of the ecosystem service function in Qinghai Province totaled 247,200 square kilometers, and the important areas summed to 124,500 square kilometers. Combined extremely important and important areas of the ecosystem service function reached 371,700 square kilometers and accounted for 53.36% of the total area of Qinghai. The ecological protection red line has now become an important national strategy for ecological protection. The demarcation of the ecological protection red line has great significance in safeguarding Qinghai’s ecological security. It is the basic guarantee for sustainable economic and social development in China.

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Section: Introductionmentioning

confidence: 99%

Defining Important Areas for Ecosystem Conservation in Qinghai Province under the Policy of Ecological Red Line

Chen

Xiao

et al. 2023

Sustainability

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“…To date, few studies have focused on forest regeneration in both of these forest types. Dao and Hölscher [ 44 ] examined the regeneration status of three threatened species in north-western Vietnam and found that most of those tree species regenerated in core zones, while their regeneration was poorer in buffer zones and restoration zones. Van and Cochard [ 45 ] suggested that forest isolation contributed to decreasing regeneration of rare tree species in lowland hillside rainforests in central Vietnam.…”

Section: Introductionmentioning

confidence: 99%

Tree regeneration characteristics in limestone forests of the Cat Ba National Park, Vietnam

et al. 2022

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Background The ability of overstory tree species to regenerate successfully is important for the preservation of tree species diversity and its associated flora and fauna. This study investigated forest regeneration dynamics in the Cat Ba National Park, a biodiversity hotspot in Vietnam. Data was collected from 90 sample plots (500 m2) and 450 sub-sample plots (25 m2) in regional limestone forests. We evaluated the regeneration status of tree species by developing five ratios relating overstory and regeneration richness and diversity. By examining the effect of environmental factors on these ratios, we aimed to identify the main drivers for maintaining tree species diversity or for potential diversity gaps between the regeneration and the overstory layer. Our results can help to increase the understanding of regeneration patterns in tropical forests of Southeast Asia and to develop successful conservation strategies. Results We found 97 tree species in the regeneration layer compared to 136 species in the overstory layer. The average regeneration density was 3764 ± 1601 per ha. Around 70% of the overstory tree species generated offspring. According to the International Union for Conservation of Nature’s Red List, only 36% of threatened tree species were found in the regeneration layer. A principal component analysis provided evidence that the regeneration of tree species was slightly negatively correlated to terrain factors (percentage of rock surface, slope) and soil properties (cation exchange capacity, pH, humus content, soil moisture, soil depth). Contrary to our expectations, traces of human impact and the prevailing light conditions (total site factor, gap fraction, openness, indirect site factor, direct site factor) had no influence on regeneration density and composition, probably due to the small gradient in light availability. Conclusion We conclude that the tree species richness in Cat Ba National Park appears to be declining at present. We suggest similar investigations in other biodiversity hotspots to learn whether the observed trend is a global phenomenon. In any case, a conservation strategy for the threatened tree species in the Cat Ba National Park needs to be developed if tree species diversity is to be maintained.

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“…To date, few studies have focused on forest regeneration in these forests. Dao and Hölscher [43] examined the regeneration status of three threatened species in north-western Vietnam, and found that most of those tree species regenerated in core zones while their regeneration was poorer in buffer zones and restoration zones. Van and Cochard [44] suggested that forest isolation contributed to decreasing regeneration of rare tree species in lowland hillside rainforests in central Vietnam.…”

Section: Introductionmentioning

confidence: 99%

Tree Regeneration Characteristics in Limestone Forests of the Cat Ba National Park, Vietnam

Pham¹,

Ammer²,

Annighöfer³

et al. 2021

Preprint

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Background: Forest regeneration is decisive for future forest development and therefore of major concern to forest ecologists. The ability of overstory tree species to regenerate successfully is important for the preservation of tree species diversity and its associated flora and fauna. This study investigated forest regeneration dynamics in the Cat Ba National Park, a biodiversity hotpot in Vietnam. Data was collected from 90 sample plots and 450 sub-sample plots in the regional limestone forests. We compared species richness between the regeneration and overstory tree layers and examined the effect of environmental factors on the occurrence of regeneration. We developed five ratios to relate overstory and regeneration richness and diversity. Results: We found 97 tree species in the regeneration layer compared to 136 species in the overstory layer. Average regeneration density was 3,764 ± 1,601 per ha. Around 70% of the overstory tree species generated offspring. Of the tree species threatened according to The International Union for Conservation of Nature’s Red List of Threatened Species, only 36% were found in the regeneration layer. A principal component analysis provided evidence that the regeneration of tree species was linked to terrain factors (percentage of rock surface, slope) and soil properties (Cation exchange capacity, pH, humus content, soil moisture, soil depth). Contrary to our expectations, the prevailing light conditions (total site factor, gap fraction, openness, indirect site factor, direct site factor) had no influence on regeneration density and composition, probably due to the small gradient in light availability. Conclusion: We conclude that tree species richness in Cat Ba National Park appears to be declining at present. We suggest similar investigations in other biodiversity hotspots to learn whether the observed trend is a global phenomenon. In any case, a conservation strategy for the threatened tree species in the Cat Ba National Park needs to be developed if tree species diversity is to be maintained.

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Fujian cypress and two other threatened tree species in three conservation zones of a nature reserve in north-western Vietnam

Cited by 7 publications

References 32 publications

Defining Important Areas for Ecosystem Conservation in Qinghai Province under the Policy of Ecological Red Line

Defining Important Areas for Ecosystem Conservation in Qinghai Province under the Policy of Ecological Red Line

Tree regeneration characteristics in limestone forests of the Cat Ba National Park, Vietnam

Tree Regeneration Characteristics in Limestone Forests of the Cat Ba National Park, Vietnam

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Fujian cypress and two other threatened tree species in three conservation zones of a nature reserve in north-western Vietnam

Cited by 7 publications

References 32 publications

Defining Important Areas for Ecosystem Conservation in Qinghai Province under the Policy of Ecological Red Line

Defining Important Areas for Ecosystem Conservation in Qinghai Province under the Policy of Ecological Red Line

Tree regeneration characteristics in limestone forests of the Cat Ba National Park, Vietnam

Tree Regeneration Characteristics in Limestone Forests of the Cat Ba&nbsp;National Park, Vietnam

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Tree Regeneration Characteristics in Limestone Forests of the Cat Ba National Park, Vietnam