scholarly journals Research on Species Ecological Adaptability of Shrub Vegetation of Highway Slope

2015 ◽  
Author(s):  
Guibin Ji ◽  
Liang Li ◽  
Ying Zhai ◽  
Xilin Li
Keyword(s):  
Ecological Adaptability

Ecological Adaptability of Zhengdan 958 Hybrid in Northeast of China

2010 ◽  
Vol 36 (2) ◽  
pp. 296-302 ◽  
Author(s):  
Cai-Yun BAI ◽  
Shao-Kun LI ◽  
Hou-Bao ZHANG ◽  
Jun-Hua BAI ◽  
Rui-Zhi XIE ◽  
...  
Keyword(s):  
Ecological Adaptability ◽  
Northeast Of China

scholarly journals Giant African snail genomes provide insights into molluscan whole-genome duplication and aquatic-terrestrial transition

2020 ◽  
Author(s):  
Conghui Liu ◽  
Yuwei Ren ◽  
Zaiyuan Li ◽  
Qi Hu ◽  
Lijuan Yin ◽  
...  
Keyword(s):  
Whole Genome Duplication ◽  
Genome Duplication ◽  
Terrestrial Ecosystems ◽  
Gene Families ◽  
Gene Clusters ◽  
Immune Defense ◽  
Whole Genome ◽  
Genomic Plasticity ◽  
Ecological Adaptability ◽  
Chromosome Level

AbstractWhole-genome duplication (WGD) has been observed across a wide variety of eukaryotic groups, contributing to evolutionary diversity and environmental adaptability. Mollusks are the second largest group of animals, and are among the organisms that have successfully adapted to the nonmarine realm through aquatic-terrestrial (A-T) transition, and no comprehensive research on WGD has been reported in this group. To explore WGD and the A-T transition in Mollusca, we assembled a chromosome-level reference genome for the giant African snail Achatina immaculata, a global invasive species, and compared the genomes of two giant African snails (A. immaculata and Achatina fulica) to the other available mollusk genomes. The chromosome-level macrosynteny, colinearity blocks, Ks peak and Hox gene clusters collectively suggested the occurrence of a WGD event shared by A. immaculata and A. fulica. The estimated timing of this WGD event (∼70 MYA) was close to the speciation age of the Sigmurethra-Orthurethra (within Stylommatophora) lineage and the Cretaceous-Tertiary (K-T) mass extinction, indicating that the WGD reported herein may have been a common event shared by all Sigmurethra-Orthurethra species and could have conferred ecological adaptability and genomic plasticity allowing the survival of the K-T extinction. Based on macrosynteny, we deduced an ancestral karyotype containing 8 conserved clusters for the Gastropoda-Bivalvia lineage. To reveal the mechanism of WGD in shaping adaptability to terrestrial ecosystems, we investigated gene families related to the respiration, aestivation and immune defense of giant African snails. Several mucus-related gene families expanded early in the Stylommatophora lineage, functioning in water retention, immune defense and wound healing. The hemocyanins, PCK and FBP families were doubled and retained after WGD, enhancing the capacity for gas exchange and glucose homeostasis in aestivation. After the WGD, zinc metalloproteinase genes were highly tandemly duplicated to protect tissue against ROS damage. This evidence collectively suggests that although the WGD may not have been the direct driver of the A-T transition, it provided an important legacy for the terrestrial adaptation of the giant African snail.

scholarly journals Betula pendula Ssp. distribution and growth in the sub-Carpathian curvature

2021 ◽  
Vol 3 (2) ◽  
pp. 16-22
Author(s):  
Mihai Harpa ◽  
◽  
Lucian Dinca
Keyword(s):  
Betula Pendula ◽  
Stand Structure ◽  
Economic Value ◽  
Wood Products ◽  
Fuel Wood ◽  
Annual Increment ◽  
Ecological Adaptability ◽  
Secondary Species ◽  
Site Type ◽  
Successional Species

Birch ssp. in the sub-Carpathians curvature can be found in composition with beech and other resinous species, unevenly distributed from the mountain peaks at around 1200 m down to 500-600, mainly from high hills to depressions at 600m, rarely seen on plain sites, crossing different geomorphological structures and overall accounting for 3857.1 ha. The main objective of the paper was to analyze the site and stand characteristics of Betula pendula ssp. Roth. in the subCarpathians curvature as followed: stand structure, stand types and stand site types, soils and different metrics, from growth to yields and its connectivity.The ecological adaptability to climate and soil and early fast growth, makes silver birch fulfill the overall requirements as a pioneer species, mostly naturally regenerated. Birch distribution is highly influenced by stand structure having low proportion in compositions, mean height of 15 m at age 50, and a diameter of 20m. Regarding the site, characteristics are more commonly found on fertile soils, corrugated or fragmented site type with a slope of 20-50° and it is distributed as secondary species in stands, averaging 750m in attitude, ranging from 500 to 1200m, 90% being in mixtures with other species with a mean annual increment of approximately 7 m³/year/ha regardless of stand site type. As an early successional species, it serves as a first colonizer but secondary species and quite often as an ecological instrument to improve the soil characteristics, biodiversity and prevent landslides in certain sites, lacking economic value other than fuel wood or other non-wood products.

scholarly journals The ecological adaptability of cloned sheep to free-grazing in the Tengger Desert of Inner Mongolia, China

2014 ◽  
Vol 1 (3) ◽  
pp. 191 ◽  
Author(s):  
Xinxin LI ◽  
Huijuan WANG ◽  
Guanghua SU ◽  
Zhuying WEI ◽  
Chunling BAI ◽  
...  
Keyword(s):  
Inner Mongolia ◽  
Tengger Desert ◽  
Ecological Adaptability ◽  
Free Grazing ◽  
The Tengger Desert

scholarly journals Ecological adaptability of new spring barley varieties to stress factors

2016 ◽  
Vol 0 (110) ◽  
pp. 29-35
Author(s):  
О. О. Вінюков ◽  
О. Б. Бондарева ◽  
О. М. Коробова
Keyword(s):  
Spring Barley ◽  
Stress Factors ◽  
Ecological Adaptability

scholarly journals Feeding Dimorphism in a Mycophagous Nematode, Bursaphelenchus sinensis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Natsumi Kanzaki ◽  
Taisuke Ekino ◽  
Robin M. Giblin-Davis
Keyword(s):  
Prey Species ◽  
Culture Media ◽  
Morphological Characters ◽  
Free Living ◽  
Ecological Adaptability ◽  
Free Living Nematode ◽  
Food Species ◽  
Phylogenetic Origin ◽  
Biological Characters ◽  
Laboratory Culturing

Abstract Phenotypic plasticity has been widely reported in animals and can drive investment in new biological characters that engender ecological adaptability. The nematode family Diplogastridae, especially Pristionchus pacificus with its dramatic stomatal (feeding) dimorphism, has become an important model system to analyze the evolutionary and developmental aspects of polyphenism. However, this plasticity has not been confirmed in other nematode groups. In the present study, we experimentally examined the feeding dimorphism of a fungal feeding free-living nematode, Bursaphelenchus sinensis. In a laboratory culturing experiment, the nematode expressed dimorphism, i.e., a small proportion of the population manifested as a predatory form. This form only occurred in females and was not clearly influenced by the presence of potential prey species. In addition, the ratio of the predatory form to the mycophagous form varied among different fungal food species grown in monoculture on different culture media. The predatory form of B. sinensis was typologically similar to the monomorphic (specialized) predators belonging to the same family. However, some essential morphological characters were slightly different from the specialized predators, and their behaviours were clearly disparate, suggesting that predation in B. sinensis is derived from a different phylogenetic origin than that of the specialized predators.

Ecological Adaptability of Traditional Vernacular Architecture of the Taihang Mountains

2012 ◽  
Vol 174-177 ◽  
pp. 3134-3137
Author(s):  
Hui Xian Jia ◽  
Ying Peng ◽  
Qing Hui Dong
Keyword(s):  
Sustainable Development ◽  
Energy Saving ◽  
Vernacular Architecture ◽  
Ecological Factors ◽  
Mountainous Terrain ◽  
Ecological Adaptability ◽  
Construction Techniques

Because of the special mountainous terrain of Taihang Mountains, a large number of vernacular architecture adapt to the environment and continue to develop so far, which encompasses a large number of eco-technologies and concepts. By analyzing and researching the layout of the vernacular architecture of the Taihang Mountains, the shape of space, materials technology, energy-saving technologies, construction techniques, we can discover the suitable ecological factors, and provide the basis for the realization of sustainable development and updating of the vernacular architecture.

scholarly journals Douglas-fir provenance phenology observations

2013 ◽  
Vol 32 (4) ◽  
Author(s):  
Vera Lavadinović ◽  
Vasilije Isajev ◽  
Ljubinko Rakonjac ◽  
Vladan Popović ◽  
Aleksandar Lučić
Keyword(s):  
Introduced Species ◽  
Natural Habitat ◽  
Extreme Temperature ◽  
Douglas Fir ◽  
Cold Climate ◽  
Timber Species ◽  
Bud Burst ◽  
Ecological Adaptability ◽  
Seed Transfer ◽  
The Pacific

AbstractLavadinović V., Isajev V., Rakonjac L., Popović V., Lučić A.: Douglas-fir provenance phenology observations. Ekologia (Bratislava), Vol. 32, No. 4, p. 376-382, 2013.Introduction of species involves adaptation, productivity and success in new types of environmental conditions. The introduction also includes confirmation to bring in only species which are superior on their natural habitat. In Canada and western North America, Douglas fir (Pseudotsuga menziesii/Mirb./Franco) is one of the most ecologically and economically value trees. In Europe, New Zealand, Australia and Chile, Douglas fir is important as an exotic fast-growing timber species. Douglas fir has one of the widest natural ranges of any tree species, extending from the Pacific Coast to the eastern slope of the Rocky Mountains and from 19°N in Mexico to 55°N in western Canada. In Serbia, from the original seeds introduced from British Columbia and Canada, the experimental Douglas-fir provenance is established in a few locations. One of the main dangers for the Douglas fir is its sensitivity to the occurrence of late frost in spring and early occurrence of frost in the autumn. The aim of the paper is to test the effect of environment on the expression of Douglas-fir seed transfer. Bud burst phenology is closely related to genecology of introduced species. Douglas fir is susceptible to cold climate and most of its genetic structure and ability depends on its ecological adaptability. In order to avoid errors introduction of Douglas-fir provenances that are sensitive to the occurrence of extreme temperature, applied are researching for buds phenological changes Douglas fir, as an introduced species, has to be tested at the provenance level before its introduction to the new sites in Serbia.

scholarly journals Seed productivity and adaptability parameters of the alfalfa samples in the south of the Rostov region

2021 ◽  
pp. 28-33
Author(s):  
S. А. Ignatiev ◽  
А. А. Regidin ◽  
S S. Kravchenko
Keyword(s):  
Environmental Conditions ◽  
Crop Production ◽  
Stress Factors ◽  
Forage Grasses ◽  
The South ◽  
Seed Productivity ◽  
Ecological Adaptability ◽  
Significant Difference ◽  
The Stability ◽  
Adaptability Parameters

The general climate change in the south of Russia makes the development of new varieties of grain crops, including forage grasses, with high resistance and adaptability to climatic stress factors extremely necessary. The breeding process of forage plant adapted to changing environmental conditions is seen as an effective way to allow crop production to cope with unexpected possible climate changes with the least possible losses. The specific reaction of plants to environmental conditions is of particular interest when studying collection plant samples of different gen[1]otypes, as well as when choosing varieties for cultivation in specific conditions. Studying the stability and adaptability of collection samples of forage grasses can also make it possible to use them in different regions. The purpose of the current study was to estimate alfalfa samples by the parameters of ecological adaptability and stability according to the trait ‘seed productivity’. The objects of study were 30 samples of the VIR collection from the USA, Canada, France and Peru. There has been identified a large group of samples with bi < 1. These samples were important as genotypes with a weak responsiveness of seed productivity to worse conditions. They are to be used in hybrids to obtain an initial material that is adaptive according to the trait ‘seed productivity’ in stressful conditions. The smallest bi coefficient was found in the samples ‘K-42694’ (0.20), ‘K-32783’ (0.22) and ‘K-47804’ (0.29). The stability coefficient σd 2 , which reflects the correlation between the growing conditions and seed productivity of the samples through the years of study and was calculated on the basis of the theoretical productivity and the deviation of the theoretical value from the actual one, varied from 0.01 to 74.70. This range of variation indicates that the set of samples contains such samples whose stability of productivity is genetically determined and significantly exceeds the variability of the average productivity of the entire set. Estimation of differences according to stability of seed productivity, in comparison with the standard variety ‘Rostovskaya 90’, revealed a significant difference in this trait in the samples ‘K-43272’, ‘K-50545’, ‘K-50561’.

Sign in / Sign up

Export Citation Format

Share Document