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Many published scientific studies have explored how the complex terrain gradient in mountainous areas affects the distribution of plant diversity in mountainous areas
This area was listed as a World Natural Heritage Site in 2006 due to its biodiversity value , and was included in the newly established Giant Panda National Park in 2018 .
One of the squares is close to and parallel to the roadside, and the other square is located more than 50m away from the roadside .
At the landscape level, we compared the distribution patterns of the species diversity between the two quadrant categories along the altitude gradient .
2 ) For the second question, we intend to answer whether the terrain gradient (altitude and aspect) affects the relationship between the species diversity between the roadside and the internal plots? By comparing the species diversity between pairs of plots at the same sampling site, we analyzed the impact of roads on plant diversity along with terrain gradients .
The results show that ( i ) species richness is distributed along the altitude gradient with a single peak, and reaches a peak at mid-altitude; these patterns are changed to some extent by non-native species and annual biological species; ( ii ) mountain roads pass through local and multi-year The selective extinction of biological species and the colonization of annual plants have led to the homogenization of the species composition of the plant community in the study area.
This phenomenon has not been found in non-native species; ( iii ) At the landscape scale, mountain roads vary in plant diversity The contribution of roads is not more than 8.
98% ; compared with beta diversity, roads have a greater impact on species richness; the mountain ecosystems in the study area have a strong elasticity in their impacts on roads
Yang Hao as the corresponding authors.
Mountainous areas have the characteristics of highly diverse geological structures, erosion and climatic processes within a short distance, which will lead to huge differences in the physical environment of the plant community and the interspecific relationships within the community in terms of altitude and slope gradients
.
Many published scientific studies have explored how the complex terrain gradient in mountainous areas affects the distribution of plant diversity in mountainous areas
Qionglai Mountain ranges from 450 m to 6,250 m above sea level .
It is home to many endangered and endemic wildlife such as giant pandas, and it is also the temperate zone with the richest plants in the world
.
This area was listed as a World Natural Heritage Site in 2006 due to its biodiversity value , and was included in the newly established Giant Panda National Park in 2018 .
This study intends to answer the following two questions: 1 ) What impact did roads have on the plant diversity of Qionglai Mountain? In order to answer this question, we set up a pair of quadrats at the same sampling point
.
One of the squares is close to and parallel to the roadside, and the other square is located more than 50m away from the roadside .
At the landscape level, we compared the distribution patterns of the species diversity between the two quadrant categories along the altitude gradient .
2 ) For the second question, we intend to answer whether the terrain gradient (altitude and aspect) affects the relationship between the species diversity between the roadside and the internal plots? By comparing the species diversity between pairs of plots at the same sampling site, we analyzed the impact of roads on plant diversity along with terrain gradients .
This study uses a linear mixed effect model to analyze the impact of mountain roads on the distribution pattern of species richness along the altitude gradient, evaluates how non-native / annual species changes these diversity distribution patterns, and explores roads through the generalized additive model ( GAM ) The effect changes along the terrain gradient
.
The results show that ( i ) species richness is distributed along the altitude gradient with a single peak, and reaches a peak at mid-altitude; these patterns are changed to some extent by non-native species and annual biological species; ( ii ) mountain roads pass through local and multi-year The selective extinction of biological species and the colonization of annual plants have led to the homogenization of the species composition of the plant community in the study area.
This phenomenon has not been found in non-native species; ( iii ) At the landscape scale, mountain roads vary in plant diversity The contribution of roads is not more than 8.
98% ; compared with beta diversity, roads have a greater impact on species richness; the mountain ecosystems in the study area have a strong elasticity in their impacts on roads
The research result is Li Honglin as the first author, researcher Luo Peng and Dr.
Yang Hao as the corresponding authors.
Original link
The relative contribution of roads to the variation of plant diversity
Change trend of road effect with terrain gradient
