The mountainous regions of southwest China are recognized as pivotal centers for the origin and evolution of species. Baoxing Osmanthus ( Rehder), a rare and endemic species known for its spring blooms, is sparsely distributed within the high altitude evergreen broad-leaved forests surrounding the southwestern Sichuan Basin. However, persistent anthropogenic disturbances and habitat fragmentation have precipitated a significant decline in its natural population size, leading to the erosion of genetic resources.
View Article and Find Full Text PDFThe development of highly efficient urea oxidation reaction (UOR) electrocatalysts is the key to simultaneously achieving green hydrogen production and the treatment of urea-containing wastewater. Ni-based electrocatalysts are expected to replace precious metal catalysts for UOR because of their high activity and low cost. However, the construction of Ni-based electrocatalysts that can synergistically enhance UOR still needs further in-depth study.
View Article and Find Full Text PDFEcosystem services offered by urban forests must be proactively managed to remain diverse and sustainable. Recent research findings deserve a systematic synthesis to elucidate inherent knowledge structures and dynamics. This study focused on the urban tree diversity theme from 2000 to 2022.
View Article and Find Full Text PDFLarge old trees (LOGTs), with profound ecological and cultural significance in China, face increasing threats from climate change and human activities. We employed the BIOCLIM and DOMAIN species distribution models to predict their spatial patterns under the present climate and doubled-CO climate change scenario in 2100. We collected 604 validated LOGT occurrence records and data on 19 bioclimate factors for the analysis.
View Article and Find Full Text PDFClimate change has significantly influenced the growth and distribution of plant species, particularly those with a narrow ecological niche. Understanding climate change impacts on the distribution and spatial pattern of endangered species can improve conservation strategies. The MaxEnt model is widely applied to predict species distribution and environmental tolerance based on occurrence data.
View Article and Find Full Text PDFVenerable trees are important natural resources and cultural heritage, offering historical, ecological, social and economic value. However, global warming and anthropogenic activities have threatened their welfare and survival. A comprehensive understanding of their current and future spatial patterns, vis-á-vis environmental conditions, can inform the co-management of sustainable resource use and conservation.
View Article and Find Full Text PDF, with edible nuts and timber value, is a key tree species playing essential roles in China's subtropical forest ecosystems. However, natural and human perturbations have nearly depleted its wild populations. The study identified the dominant environmental variables enabling and limiting its distribution and predicted its suitable habitats and distribution.
View Article and Find Full Text PDFChina's 14th Five-Year Plan, for the period 2021-25, presents a real opportunity for China to link its long-term climate goals with its short-to medium-term social and economic development plans. China's recent commitment to achieving carbon neutrality by 2060 has set a clear direction for its economy, but requires ratcheting up ambition on its near-term climate policy. Against this background, this paper discusses major action areas for China's 14th Five-Year Plan after COVID-19, especially focusing on three aspects: the energy transition, a new type of sustainable urban development, and investment priorities.
View Article and Find Full Text PDFChina's power sector has received great research attention because of its large energy consumption and CO emissions. This study assesses the environmental efficiency and technology inequality of China's power sector from 2008 to 2017. Methodologically, this study proposes a non-radial FDH (free disposable hull) model and a super non-radial FDH model.
View Article and Find Full Text PDFHistorically, the diving duck, Baer's Pochard (Aythya baeri) was widely distributed in East and South Asia, but according to a recent estimate, its global population is now less than 1000 individuals. To date, the mitochondrial genome of A. baeri has not been deposited and is not available in GenBank.
View Article and Find Full Text PDFMitochondrial DNA B Resour
January 2021
The northern red-shouldered macaw, , is listed in the Convention on International Trade in Endangered Species of Wild Fauna and Flora Appendix II. Here, we report for the first time the complete mitochondrial genome of This new sequence is 16,992 base pairs (bp) in length and includes 13 protein-coding genes, 22 transfer RNAs, two ribosomal RNAs, and a single non-coding control region. The overall nucleotide composition of this sequence consists of 30.
View Article and Find Full Text PDFA. Gray is an evergreen oak species native to East Asia, and it plays a vital role in mountain ecosystems. In this study, we assembled the complete chloroplast genome of based on sequencing data.
View Article and Find Full Text PDFMitochondrial DNA B Resour
January 2020
In this study, we sequenced and characterized the complete mitochondrial genome of Green-winged macaw () listed on CITES Appendix II. The circular double-stranded genome was 16,991 bp in size and included 22 transfer RNA (tRNA) genes, 13 protein-coding genes (PCGs), two ribosomal RNA genes ( and ), and one non-coding control region (D-loop). Both order and arrangement of genes were identical to those of other animal mitogenomes.
View Article and Find Full Text PDFThe title diradical was synthesized and investigated by ESR and UV-vis spectroscopy. It was found to have a lifetime of weeks even in the presence of oxygen, and even survives brief heating in toluene up to about 60 °C. In the UV-vis spectrum, the diradical showed reversible thermochromic behavior in the -10 to 50 °C range.
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