Phytosociology of Terricolous Lichen Vegetation in the Cairngorm Mountains, Scotland

2001 ◽  
Vol 33 (4) ◽  
pp. 331-351 ◽  
Author(s):  
Alan M. Fryday

AbstractThe results of an investigation into the lichen vegetation associated with vascular plant communities in the Scottish Highlands are presented. Most lichen species rarely occur in homogeneous stands of vascular plant vegetation, either occurring around the edges of recognized National Vegetation Classification (NVC) communities or in small-scale mosaics with them. However, some lichen species have a high fidelity to the more open NVC communities. The problems associated with applying NVC survey techniques to lichen assemblages are described and discussed.




Author(s):  
Илья Борисович Кучеров ◽  
Галина Александровна Гришуткина ◽  
Виктория Владимировна Телеганова ◽  
Алексей Дмитриевич Потемкин

Эпифитные и эпиксильные виды мохообразных и лишайников могут выступать в качестве диагностических не только при дифференциации своих синузий, но и на уровне лесного сообщества в целом, формируя единые детерминантные группы вместе с сосудистыми растениями и эпигейными мхами. Это подтверждают результаты доминантно-детерминантной классификации широколиственных лесов, описанных в заповедниках «Калужские засеки» и «Мордовский». В обоих случаях выделенные синтаксоны поддаются флористической дифференциации с помощью не только сосудистых растений, но и эпифитных мохообразных. При необходимости их можно было бы разграничить исключительно по видам эпифитной бриосинузии. Формирование единых детерминантных групп обусловлено влиянием факторов, единообразно воздействующих на все виды, входящие в эти группы. Первостепенную роль предположительно играют микроклиматические факторы, особенно влажность и амплитуды температур приземного слоя воздуха. Эдафические факторы не оказывают прямого влияния на сопряженность видов сосудистых растений и эпифитных мохообразных, но их косвенное влияние также может быть существенным. Piphytic and epixylic species of bryophytes and lichens may serve as determinants in differentiation of not only their synusiae but also at the level of forest plant communities where they grow, forming integrated differential groups together with vascular plant and epigeic bryophyte species. This is proved by the results of the broadleaved forest classification, performed following the complex dominant-determinant approach in the Kaluzhskie Zaseki (see Table 1) and Mordovian (see Table 2) nature reserves, Russia. All the recognized broadleaved-forest syntaxa are subject to distinct floristic differentiation with the help of both vascular and epiphytic bryophyte species under ecologically contrasting habitat conditions. Moreover, if necessary, these syntaxa can be distinguished using the epiphytic species only. The ecological and phytocoenotical association of vascular and epiphytic bryophyte species presumably originates due to microclimatic factors such as air humidity and temperature ranges near the ground. Edaphic factors do not influence the association of vasculars and epiphytic bryophytes within the integrated determinant groups directly, but their indirect influence may be also essential.



Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 864
Author(s):  
Alexa McKerrow ◽  
Anne Davidson ◽  
Matthew Rubino ◽  
Don Faber-Langendoen ◽  
Daryn Dockter

Plant communities represent the integration of ecological and biological processes and they serve as an important component for the protection of biological diversity. To measure progress towards protection of ecosystems in the United States for various stated conservation targets we need datasets at the appropriate thematic, spatial, and temporal resolution. The recent release of the LANDFIRE Existing Vegetation Data Products (2016 Remap) with a legend based on U.S. National Vegetation Classification allowed us to assess the conservation status of plant communities of the U.S. The map legend is based on the Group level of the USNVC, which characterizes the regional differences in plant communities based on dominant and diagnostic plant species. By combining the Group level map with the Protected Areas Database of the United States (PAD-US Ver 2.1), we quantified the representation of each Group. If the mapped vegetation is assumed to be 100% accurate, using the Aichi Biodiversity target (17% land in protection by 2020) we found that 159 of the 265 natural Groups have less than 17% in GAP Status 1&2 lands and 216 of the 265 Groups fail to meet a 30% representation target. Only four of the twenty ecoregions have > 17% of their extent in Status 1&2 lands. Sixteen ecoregions are dominated by Groups that are under-represented. Most ecoregions have many hectares of natural or ruderal vegetation that could contribute to future conservation efforts and this analysis helps identify specific targets and opportunities for conservation across the U.S.





2019 ◽  
pp. 135-142
Author(s):  
K. V. Ivanova ◽  
A. M. Lapina ◽  
V. V. Neshataev

The 2nd international scientific conference «Fundamental problems of vegetation classification» took place at the Nikitskiy Botanical Garden (Yalta, Republic of Crimea, Russia) on 15–20 September 2019. There were 56 participants from 33 cities and 43 research organizations in Russia. The conference was mostly focused on reviewing the success in classification of the vegetation done by Russian scientists in the past three years. The reports covered various topics such as classification, description of new syntaxonomical units, geobotanical mapping for different territories and types of vegetation, studies of space-time dynamics of plant communities. The final discussion on the last day covered problems yet to be solved: establishment of the Russian Prodromus and the National archive of vegetation, complications of higher education in the profile of geobotany, and the issue of the data leakage to foreign scientific journals. In conclusion, it was announced that the 3rd conference in Nikitskiy Botanical Garden will be held in 2022.



2009 ◽  
pp. 27-53
Author(s):  
A. Yu. Kudryavtsev

Diversity of plant communities in the nature reserve “Privolzhskaya Forest-Steppe”, Ostrovtsovsky area, is analyzed on the basis of the large-scale vegetation mapping data from 2000. The plant community classi­fication based on the Russian ecologic-phytocoenotic approach is carried out. 12 plant formations and 21 associations are distinguished according to dominant species and a combination of ecologic-phytocoenotic groups of species. A list of vegetation classification units as well as the characteristics of theshrub and woody communities are given in this paper.



2015 ◽  
Vol 201 ◽  
pp. 26-42 ◽  
Author(s):  
Tuomo Takala ◽  
Jasmiina Haverinen ◽  
Eeva Kuusela ◽  
Teemu Tahvanainen ◽  
Jari Kouki


2005 ◽  
Vol 14 (5) ◽  
pp. 580-596 ◽  
Author(s):  
Simon Lessels ◽  
Roy A. Ruddle

Two experiments investigated participants' ability to search for targets in a cluttered small-scale space. The first experiment was conducted in the real world with two field of view conditions (full vs. restricted), and participants found the task trivial to perform in both. The second experiment used the same search task but was conducted in a desktop virtual environment (VE), and investigated two movement interfaces and two visual scene conditions. Participants restricted to forward only movement performed the search task quicker and more efficiently (visiting fewer targets) than those who used an interface that allowed more flexible movement (forward, backward, left, right, and diagonal). Also, participants using a high fidelity visual scene performed the task significantly quicker and more efficiently than those who used a low fidelity scene. The performance differences among all the conditions decreased with practice, but the performance of the best VE group approached that of the real-world participants. These results indicate the importance of using high fidelity scenes in VEs, and suggest that the use of a simple control system is sufficient for maintaining one's spatial orientation during searching.



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