scholarly journals Species diversity of Oribatida mite community (Acari: Oribatida) by soil types and habitats in the Red river delta, Viet Nam

2019 ◽  
Vol 2 (6) ◽  
pp. 11-22
Author(s):  
Lai Thu Hien ◽  
Vu Quang Manh
Keyword(s):  
Species Diversity ◽  
Agricultural Land ◽  
Acid Soil ◽  
Alluvial Soil ◽  
River Delta ◽  
Red River ◽  
Soil Types ◽  
Species Number ◽  
Red River Delta ◽  
Close Relationship

Research was undertaken from 2013 to 2017, in eleven provinces and cities, in the Red river delta, Vietnam. Samples were collected from fives types of habitat as follow: natural forest, human – disturbed forest, grassland, cultivated land with perennial plants, agricultural land with annual plants. Samples were also taken from five types of soil: coastal saline - acid soil, acid alluvial soil, neutral alluvial soil, ferritic brownish soil derived from limestone and emaciated greyish soil. In this research, we recorded 283 oribatida species, beloning to 129 genus, 59 families. Among them, 49 species were not defined to species. In comparison with the recordes of Vu Quang Manh (2013) and Ermilov (2015), there are 108 species were for the first time recorded for research region fauna and 65 speciesare new for the Vietnamese fauna. Species diversity of oribatida community in each type of soil and in each habitat are different from each others. The species number in each soil type oscillated from 78 species to 178 species. The species number in each habitat oscillated from 95 species to 127 species. The rate of species which only were recorded in one type of soil or in one habitat is high. The results show that soil types and habitats are in close relationship with oribatida community. It is the scientific base for using oribatida community as a biodiversity for soil quality.  

scholarly journals The Change of Oribatida Mite (Acari: Oribatida) Community Structure Follow Four Types of Soil in the Red River Delta, Vietnam

2017 ◽  
Vol 33 (4) ◽  
Author(s):  
Lai Thu Hien ◽  
Do Thi Duyen ◽  
Vu Quang Manh
Keyword(s):  
Community Structure ◽  
Sustainable Management ◽  
Acid Soil ◽  
Alluvial Soil ◽  
Red River ◽  
Soil Types ◽  
Species Number ◽  
Red River Delta ◽  
Close Relationship ◽  
Specific Community

Recorded are 59 oribatida species belong to 34 genus, 20 families. In the comparision with Vu Quang Manh (2013), there are 38 species were first recorded in the reseach region, 15 species are new for the Vietnamese fauna (Vu Quang Manh, 2013). The species number in different soil types oscillated from 16 species to 26 species . A remark can be made after analysing 4 oribatida communities is that all the three oribatida communities in the group of alluvial soil are more diverse and more stable than yellow-red hummus on the mountains. There may be a specific community formed in coastal saline-acid soil. This community is a complex of species adapt to saline-acid soil, so it is not diverse in the number of species but is very stable. The result shown that soil type is in the close relationship to the oribatida community structure. Therefore oribatida can be used as a bioindicator of soil quality and proposed as a means for sustainable management of soil ecosysterm.

Climate Change and Land Use Change of Rural Households in The Red River Delta, Vietnam

2013 ◽  
pp. 79-94
Author(s):  
Ngoc Luu Bich
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Agricultural Land ◽  
Rural Households ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Sea Levels ◽  
Main Production ◽  
Farming Households

Climate change (CC) and its impacts on the socio-economy and the development of communities has become an issue causing very special concern. The rise in global temperatures, in sea levels, extreme weather phenomena, and salinization have occurred more and more and have directly influenced the livelihoods of rural households in the Red River Delta – one of the two regions projected to suffer strongly from climate change in Vietnam. For farming households in this region, the major and traditional livelihoods are based on main production materials as agricultural land, or aquacultural water surface Changes in the land use of rural households in the Red River Delta during recent times was influenced strongly by the Renovation policy in agriculture as well as the process of industrialization and modernization in the country. Climate change over the past 5 years (2005-2011) has started influencing household land use with the concrete manifestations being the reduction of the area cultivated and the changing of the purpose of land use.

Impact of mangrove age on sediment retention and wave dissipation and its links to ecosystem services in the Red River Delta, Vietnam

2020 ◽  
Author(s):  
Chris Hackney ◽  
Rachael Carrie ◽  
Dao Tan Van ◽  
Joshua Ahmed ◽  
Serena Teasdale ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Agricultural Land ◽  
Storm Surges ◽  
River Delta ◽  
Red River ◽  
Tidal Range ◽  
Mangrove Forests ◽  
Sediment Retention ◽  
Red River Delta ◽  
Sea Levels

<p>Mangroves provide critical ecosystem services that support livelihoods and communities at the coastal margin. They are key natural flood defences to tropical cyclone driven storm surges, they store sediment that is vital for maintaining delta surface elevations in the face of rising sea levels, and transfer key nutrients to agricultural land. Over the past few decades, stressors on mangroves have increased with associated declines in global areal extent, and growing concern about their condition, including for forests that have been restored or afforested. Most remaining mangrove forests comprises a mix of ages and quality. Limited research exists exploring how differing age, structure and health of mangroves impacts sediment retention and aids the dissipation of wave and storm energy, and links these physical processes to the delivery of ecosystem services.</p><p> </p><p>In this study, we demonstrate how mangrove age and health differentially impacts rates of sedimentation, attenuates water level and tidal propagation and aids storm energy dissipation along a section of mangrove forest in Thai Binh province on the Red River Delta in Vietnam. Data were collected over a four month period and highlight spatially variable responses to tides and the increasing influence of the nearby Thai Binh River. We show that sedimentation rates vary from 0.8 m/yr to 0.14 m/yr with increasing distance inland, whilst peak tidal range varies from 1.5 m to 0.5 m with mangrove age.  We demonstrate that these spatial patterns correlate not only to distance inland, but also mangrove age, and the provision of ecosystem services as recorded by household surveys from local communities. This highlights the need for global mangrove databases to account for mangrove quality and health data in order to capture definitively the ecological, hydrodynamic and sedimentological impacts of mangrove forests on coastal and deltaic regions.</p>

scholarly journals Agronomic Requirements of Tomatoes and Production Methods in the Red River Delta of Vietnam

2015 ◽  
Vol 2 (1) ◽  
pp. 33-38
Author(s):  
Tuan Minh Ha
Keyword(s):  
Management Strategies ◽  
River Delta ◽  
Red River ◽  
Soil Types ◽  
Vegetable Crops ◽  
Red River Delta ◽  
Tomato Production ◽  
General Guide ◽  
Cropping Seasons ◽  
Cultivation Techniques

Tomato (Lycopersicon esculentum Mill.) (Solanaceae) is one of the most economically important vegetable crops in the Red River Delta (RRD) of Northern Vietnam. The recent market demands for tomatoes in both domestic and overseas markets have led to an increasing cultivated area for the crop in the RRD. To support growers in producing healthy and quality produce, this paper presents in detail the agronomic requirements of tomatoes regarding temperatures, light, water, suitable soil types and nutrients. Cultivation techniques are discussed to provide a general guide for developing appropriate management strategies, depending on specific soil types, cropping seasons, cultivars and availability of resources. In addition, six major pests have been defined, providing useful information for developing an integrated pest management (IPM) program for tomato production in the region.

Phosphate immobilisation dynamics and interaction with arsenic sorption at redox transition zones in floodplain aquifers: Insights from the Red River Delta, Vietnam

2021 ◽  
Vol 411 ◽  
pp. 125128
Author(s):  
Harald Neidhardt ◽  
Sebastian Rudischer ◽  
Elisabeth Eiche ◽  
Magnus Schneider ◽  
Emiliano Stopelli ◽  
...  
Keyword(s):  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
Transition Zones ◽  
Redox Transition

The epidemiology of nematode and fluke infections in cattle in the Red River Delta in Vietnam

2000 ◽  
Vol 93 (2) ◽  
pp. 141-147 ◽  
Author(s):  
W.G Holland ◽  
T.T Luong ◽  
L.A Nguyen ◽  
T.T Do ◽  
J Vercruysse
Keyword(s):  
River Delta ◽  
Red River ◽  
Red River Delta

Paddy rice mapping in red river delta region using landsat 8 images: Preliminary results

2017 ◽  
Author(s):  
Man Duc Chuc ◽  
Nguyen Hoang Anh ◽  
Nguyen Thanh Thuy ◽  
Bui Quang Hung ◽  
Nguyen Thi Nhat Thanh
Keyword(s):  
Paddy Rice ◽  
River Delta ◽  
Red River ◽  
Landsat 8 ◽  
Delta Region ◽  
Red River Delta ◽  
Preliminary Results
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