scholarly journals Effects of pine wilt disease invasion on soil properties and Masson pine forest communities in the Three Gorges reservoir region, China

2015 ◽  
Vol 5 (8) ◽  
pp. 1702-1716 ◽  
Author(s):  
Ruihe Gao ◽  
Juan Shi ◽  
Ruifen Huang ◽  
Zhuang Wang ◽  
Youqing Luo
Keyword(s):  
Soil Properties ◽  
Three Gorges Reservoir ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Three Gorges ◽  
Forest Communities ◽  
Masson Pine ◽  
The Three Gorges ◽  
Pine Wilt ◽  
Masson Pine Forest

scholarly journals Relationship between Pine Wilt Disease Outbreaks and Climatic Variables in the Three Gorges Reservoir Region

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 816 ◽  
Author(s):  
Ruihe Gao ◽  
Zhuang Wang ◽  
Haixiang Wang ◽  
Yanping Hao ◽  
Juan Shi
Keyword(s):  
Three Gorges Reservoir ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Climatic Variables ◽  
Three Gorges ◽  
Masson Pine ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Pine Wilt ◽  
Three Gorges Reservoir Region

Outbreaks of pine wilt disease (PWD, caused by the pinewood nematode Bursaphelenchus xylophilus), have caused mass mortality of the genus Pinus in Eurasia. Climate change may greatly influence the distribution and population dynamics of longhorn beetles of the genus Monochamus (the main vector of B. xylophilus), the survival and development of B. xylophilus, and the resistance of pines. The aim of this study was to investigate the effect of climatic variables associated with extensive PWD outbreaks in Masson pine (Pinus massoniana Lamb.) forest across the eastern part of the Three Gorges Reservoir region. Since its discovery in 2006, the most serious PWD outbreak occurred from 2014 to 2018; the most striking characteristic of this outbreak is the consistent increase in Masson pine mortality and extent of the affected areas. Moreover, 28 out of 46 PWD biological relevant climatic variables were selected and used for redundancy analysis. The ordination biplots reflect the complicated quantitative relationship between the PWD epidemic variables and the biologically relevant climatic variables of temperature, precipitation, relative humidity, and wind speed. The results will be useful for understanding the role climatic variables play in PWD outbreaks, for predicting the spread and pattern of PWD outbreaks, and for the advance preparation of management strategies with the purpose of preventing future PWD outbreaks.

scholarly journals Regeneration of Different Plant Functional Types in a Masson Pine Forest Following Pine Wilt Disease

PLoS ONE ◽  
2012 ◽  
Vol 7 (5) ◽  
pp. e36432 ◽  
Author(s):  
Guang Hu ◽  
Xuehong Xu ◽  
Yuling Wang ◽  
Gao Lu ◽  
Kenneth J. Feeley ◽  
...  
Keyword(s):  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Pine Forest ◽  
Plant Functional Types ◽  
Masson Pine ◽  
Pine Wilt ◽  
Functional Types ◽  
Masson Pine Forest

scholarly journals Effects of Landscape Positions and Landscape Types on Soil Properties and Chlorophyll Content of Citrus in a Sloping Orchard in the Three Gorges Reservoir Area, China

2021 ◽  
Vol 13 (8) ◽  
pp. 4288
Author(s):  
Siyue Sun ◽  
Guolin Zhang ◽  
Tieguang He ◽  
Shufang Song ◽  
Xingbiao Chu
Keyword(s):  
Soil Properties ◽  
Chlorophyll Content ◽  
Three Gorges Reservoir ◽  
Slope Position ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Area ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Landscape Types

In recent years, soil degradation and decreasing orchard productivity in the sloping orchards of the Three Gorges Reservoir Area of China have received considerable attention both inside and outside the country. More studies pay attention to the effects of topography on soil property changes, but less research is conducted from the landscape. Therefore, understanding the effects of landscape positions and landscape types on soil properties and chlorophyll content of citrus in a sloping orchard is of great significance in this area. Our results showed that landscape positions and types had a significant effect on the soil properties and chlorophyll content of citrus. The lowest soil nutrient content was detected in the upper slope position and sloping land, while the highest exists at the footslope and terraces. The chlorophyll content of citrus in the middle and upper landscape position was significantly higher than the footslope. The redundancy analysis showed that the first two ordination axes together accounted for 81.32% of the total variation, which could be explained by the changes of soil total nitrogen, total phosphorus, total potassium, available nitrogen, available potassium, organic matter, pH, and chlorophyll content of the citrus. Overall, this study indicates the significant influence of landscape positions and types on soil properties and chlorophyll content of citrus. Further, this study provides a reference for the determination of targeted land management measures and orchard landscape design so that the soil quality and orchard yield can be improved, and finally, the sustainable development of agriculture and ecology can be realized.

Pine wilt disease alters soil properties and root-associated fungal communities in Pinus tabulaeformis forest

2016 ◽  
Vol 404 (1-2) ◽  
pp. 237-249 ◽  
Author(s):  
Honglong Chu ◽  
Chunyan Wang ◽  
Haihua Wang ◽  
Hui Chen ◽  
Ming Tang
Keyword(s):  
Soil Properties ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Fungal Communities ◽  
Pinus Tabulaeformis ◽  
Pine Wilt

Differences in arthropod communities between island and inland Masson pine forests infested by pine wilt disease in Zhejiang Province

2008 ◽  
Vol 10 (1) ◽  
pp. 1-8
Author(s):  
Hai-wei Wu ◽  
You-qing Luo ◽  
Juan Shi ◽  
Xiao-su Yan ◽  
Wei-ping Chen ◽  
...  
Keyword(s):  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Zhejiang Province ◽  
Pine Forests ◽  
Arthropod Communities ◽  
Masson Pine ◽  
Pine Wilt

scholarly journals Optimization of factors affecting the rooting of pine wilt disease resistant Masson pine (Pinus massoniana) stem cuttings

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0251937
Author(s):  
Ting Pan ◽  
Xue-lian Chen ◽  
Yan-ping Hao ◽  
Chun-wu Jiang ◽  
Song Wang ◽  
...  
Keyword(s):  
Pine Wilt Disease ◽  
Pinus Massoniana ◽  
Wilt Disease ◽  
Stem Cuttings ◽  
Simple Method ◽  
Masson Pine ◽  
Factors Affecting ◽  
Pine Wilt ◽  
Pine Trees ◽  
Root Quality

Pine wilt disease (PWD) is a devastating disease affecting trees belonging to the genus Pinus. To control the spread of PWD in the Masson pine forest in China, PWD resistant Masson pine clones have been selected by the Anhui Academy of Forestry. However, because Masson pine is a difficult-to-root species, producing seedlings is challenging, especially from trees older than 5 years of age, which impedes the application of PWD resistant clones. In this study, we investigated the factors affecting rooting of PWD resistant clones and established a cheap, reliable, and simple method that promotes rooting. We tested the effects of three management methods, four substrates, two cutting materials, two cutting treatments, and three collection times on the rooting of cuttings obtained from 9-year-old PWD resistant clones. Rooting was observed only in stem cuttings treated with the full-light automatic spray management method. Additionally, stem cuttings showed a significantly higher rooting rate and root quality than needles cuttings. Compared with other substrates, stem cuttings planted in perlite produced the longest adventitious root and the highest total root length and lateral root number. Moreover, stem cuttings of PWD resistant clones collected in May showed a significantly higher rooting rate and root quality than those collected in June and July. Moreover, stem cuttings prepared with a horizontal cut while retaining the needles showed significantly higher rooting rate and root quality than those prepared with a diagonal cut while partly removing the needles. This study promotes the reproduction of seedlings of PWD-resistant Masson pine clones which helps control the spread of PWD, meanwhile, provides a technical reference for the propagation of mature pine trees via cuttings.

scholarly journals The vertical heterogeneity of soil detachment by overland flow on the water-level fluctuation zone slope in the Three Gorges Reservoir, China

2021 ◽  
Author(s):  
Ping Guo ◽  
Hai Xiao ◽  
Feng Gao ◽  
Zijuan Li ◽  
Huan Hu ◽  
...  
Keyword(s):  
Soil Properties ◽  
Water Level ◽  
Three Gorges Reservoir ◽  
Water Level Fluctuation ◽  
Level Fluctuation ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Vertical Heterogeneity ◽  
Water Level Fluctuation Zone

Submersion and exposure from the operation of the Three Gorges Reservoir (TGR) can alter soil properties and plant characteristics at different elevations of the water level fluctuation zone (WLFZ), possibly influencing soil detachment capacity (Dc), but the vertical heterogeneity of this effect is uncertain. Soil samples were taken from 6 segments (5 m elevation per segment) along a slope profile in the WLFZ of the TGR to clarify the vertical heterogeneity of Dc. Scouring experiments were conducted at 5 slope gradients (17.63%, 26.79%, 36.40%, 46.63%, and 57.74%) and 5 flow rates (10, 15, 20, 25, and 30 L min–1) to determine Dc. The results indicate that the soil properties and biomass parameters of the WLFZ are strongly affected by elevation. Dc fluctuates with increasing elevation, with maximum and minimum average values at elevations of 145-150 m and 165-170 m, respectively. Linear equations accurately describe the relationships between Dc and hydrodynamic parameters. τ, ω, and E perform much better than U. Furthermore, a clear improvement is seen when using the general index of flow intensity to estimate Dc. Dc is significantly negatively correlated with MWD (p < 0.05) and organic matter (p < 0.01) but not significantly correlated with other soil properties (p > 0.05). At elevations of 145-150 m and 170-175 m, rill erodibility was greater than at other elevations. The critical hydraulic parameters were highest in the 165-170 m segments, both showing obviously fluctuation in the vertical direction of slope surface. This research highlighted the vertical heterogeneity of the soil detachment and was helpful to understand the mechanisms of soil detachment processes in the WLFZ of the TGR.

Relationship between soil properties and incidence of pine wilt disease at stand level

2009 ◽  
Vol 6 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Choonsig Kim ◽  
Kyung-Soo Jang ◽  
Joon-Bum Kim ◽  
Jae-Kyung Byun ◽  
Choong-Hwa Lee ◽  
...  
Keyword(s):  
Soil Properties ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Pine Wilt

Seasonal variation and longitudinal distribution characters of cladocerans in the Three Gorges Reservoir

2009 ◽  
Vol 17 (5) ◽  
pp. 512
Author(s):  
Wu Hui-xian ◽  
Yao Jian-liang ◽  
Liu Yan ◽  
Xue Jun-zeng ◽  
Cai Qing-hua ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Three Gorges Reservoir ◽  
Longitudinal Distribution ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges
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