Kształtowanie się flory porostów na korze osiki w zapustach jałowcowo-osikowych na nieużytkach porolnych podlegających sukcesji wtórnej [Formation of lichen flora on the aspen bark in the juniper-aspen brushwood on the abandoned farmlands during secondary succession]

Monographiae Botanicae ◽

10.5586/mb.1998.004 ◽

2014 ◽

Vol 84 ◽

pp. 39-72

Author(s):

Ludwik Lipnicki

Keyword(s):

Species Composition ◽

Secondary Succession ◽

Epiphytic Lichens ◽

Forest Species ◽

Waste Land ◽

Ne Poland ◽

The Relationship ◽

Lichen Flora

The thesis presents the results of research that was conducted in the Jelonka Reserve located on the edge of the Białowieska Forest (NE Poland). On the basis of successional changes taking place on the formerly arabie waste land (leading to the forest association), formation of epiphytic flora on the aspen bark is analysed. The relationship between changes of the outside conditions (mainly caused by the growth of the aspen bark) and transformation of the species composition of epiphytic lichens is revealed. The replacement of species living in the open areas by forest species is presented in details.

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Impacts of Human Activities on Tree Species Composition Along the Forest Savanna Boundary in Nigeria

Indonesian Journal of Geography ◽

10.22146/ijg.9248 ◽

2016 ◽

Vol 47 (2) ◽

pp. 115 ◽

Cited By ~ 1

Author(s):

Christiana Ndidi Egbinola

Keyword(s):

Species Composition ◽

Tree Species ◽

Human Activities ◽

Detrended Correspondence Analysis ◽

Floristic Composition ◽

Forest Species ◽

Tree Species Composition ◽

Study Sites ◽

The Impact ◽

The Relationship

The study investigated the tree species composition along the forest-savanna boundary in Oyo state of Nigeria with the aim of assessing the impact of human activities on the floristic composition. A transect was placed along the study area and species data was collected from quadrats placed in study plots within different study sites. Detrended Correspondence Analysis (DCA) was used to determine vegetation assemblages, while both correlation and the analysis of variance (ANOVA) were used to show the relationship between species in the different study sites. Results of the DCA revealed three species assemblages, an area with only forest species, another with only savanna species and a third with both forest/savanna species. ANOVA results further revealed that within the forest and savanna assemblages, species in mature and successional sites were alike. The study therefore revealed that human activities’ within the region is leading to the establishment of savanna species and an elimination of forest species.

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The lichen flora on Picea abies in a suboceanic spruce forest area in Central Norway with emphasis on the relationship to site and stand parameters

Nordic Journal of Botany ◽

10.1111/j.1756-1051.1997.tb00290.x ◽

1997 ◽

Vol 17 (1) ◽

pp. 55-76 ◽

Cited By ~ 29

Author(s):

Håkon Holien

Keyword(s):

Picea Abies ◽

Forest Area ◽

Spruce Forest ◽

Stand Parameters ◽

The Relationship ◽

Lichen Flora

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Lichens of swamp complexes of Sakhalin Island (Sakhalin Region, Russian Far East)

Novosti sistematiki nizshikh rastenii ◽

10.31111/nsnr/2021.55.2.405 ◽

2021 ◽

Vol 55 (2) ◽

pp. 405-426

Author(s):

I. F. Skirina ◽

N. A. Tsarenko ◽

F. V. Skirin

Keyword(s):

Species Composition ◽

Russian Far East ◽

Far East ◽

Sakhalin Island ◽

The South ◽

Red Lists ◽

The Far East ◽

First Time ◽

Lichen Flora

This paper presents the results of the study of lichen flora in swamp complexes of Sakhalin Island, obtained during expeditionary research in 2005–2009 and 2014–2020. The revealed species composition of lichens includes 172 species. The 28 of them are new for Sakhalin and 93 are new for the island swamp complexes. Bryocaulon pseudosatoanum is included in the regional and federal Red lists. Lecidea nylanderi is new to the south of the Far East. The information about substrates, habitats and locations is given for all species. The data on the distribution in the south of the Far East and, in some cases for all Far East, are listed for selected species that are new for Sakhalin Island and the south of the Far East. For the first time, a characteristic of the distribution of lichens in oligotrophic, eutrophic and mesotrophic bogs of Sakhalin Island is given.

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The relationship of buried, germinating seeds to vegetation in an old-growth Colorado subalpine forest

Canadian Journal of Botany ◽

10.1139/b78-176 ◽

1978 ◽

Vol 56 (13) ◽

pp. 1505-1509 ◽

Cited By ~ 47

Author(s):

Stephen A. Whipple

Keyword(s):

Subalpine Forest ◽

Forest Species ◽

Forest Stands ◽

Rapid Loss ◽

Old Growth ◽

Old Growth Forest ◽

Viable Seeds ◽

Relationship Of ◽

Germinating Seeds ◽

The Relationship

Species of buried, germinating seeds and species occurring in the vegetation are compared for two Colorado subalpine forest stands, one dry and one mesic, both over 325 years old. The total numbers of seeds found were small and the correspondence with species in the vegetation was poor. This is consistent with reports from other old-growth forests and may be accounted for by a combination of low seed input and rapid loss of viable seeds from the soil reservoir for old-growth forest species.

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Effect of the Gabčíkovo Waterworks (Slovakia) on riparian floodplain forest ecosystems in the Danube inland delta: vegetation dynamics and trends

Biologia ◽

10.1515/biolog-2017-0082 ◽

2017 ◽

Vol 72 (7) ◽

Cited By ~ 2

Author(s):

Mária Petrášová-Šibíková ◽

Igor Matečný ◽

Eva Uherčíková ◽

Peter Pišút ◽

Silvia Kubalová ◽

...

Keyword(s):

Species Composition ◽

Forest Ecosystems ◽

Supply System ◽

Floodplain Forest ◽

Soil Conditions ◽

Plant Species Composition ◽

Forest Species ◽

The Past ◽

The Impact ◽

Rare Opportunity

AbstractHuman alteration of watercourses is global phenomenon that has had significant impacts on local ecosystems and the services they provide. Monitoring of abiotic and biotic changes is essential to mitigating long-lasting effects, and the 23-year dataset from the Gabčíkovo Waterworks provided a rare opportunity to assess the impact of groundwater regimes on vegetation. The main aim of this study was to describe the effect of the Gabčíkovo Waterworks on vegetation structure and species composition of the adjacent riparian floodplain forests over the past 23 years. The results are based on studies of three permanent monitoring plots (PMPs) located in the Danube inland delta – two outside (PMP 1 and 3) and one (PMP 2) fully under the influence of the artificial supply system. Our results demonstrate that the Danube inland delta was negatively affected by the Gabčíkovo construction, particularly for sites outside of the artificial supply system. There was a significant decrease in soil moisture and increase in nitrogen at both external PMPs (1 and 3). Alter soil conditions were accompanied by negative changes in plant species composition demonstrated by decreases in the number of typical floodplain forest species that are characteristic for the alliance

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Interregional Crown Width Models for Individual Trees Growing in Pure and Mixed Stands in Austria

Forests ◽

10.3390/f11010114 ◽

2020 ◽

Vol 11 (1) ◽

pp. 114 ◽

Cited By ~ 2

Author(s):

Rafael Buchacher ◽

Thomas Ledermann

Keyword(s):

Species Composition ◽

Predictor Variable ◽

Forest Growth ◽

Silver Fir ◽

Mixed Stands ◽

Data Set ◽

Individual Tree ◽

Crown Width ◽

Site Characteristics ◽

The Relationship

Crown width is a functional trait that is commonly used to improve the estimation of above-ground biomass of forests and is often included as a predictor variable in forest growth models. Most of the existing crown width models reflect the relationship between crown width, tree size and competition variables, but do not consider the effect of species mixture. In this study, we developed crown width models for individual-tree of the major tree species growing in Austria. Because these models should be applicable for mixed and pure stands and should also take into account the characteristics of different sites, the relationship between crown width, site variables and species composition was investigated. For that purpose, we used data from a sub-sample of the Austrian National Forest Inventory, which comprises crown width measurements of about 8900 trees from 1508 sample plots. Because of the hierarchical structure of the data set (i.e., trees nested within the plot) which destroys the independencies between observations, linear mixed-effects models were used. The species composition of the stand was included via the species-specific relative proportions of basal area. To describe the interregional variability of crown width, dummy variables were introduced, which account for region-specific differences. Site characteristics were incorporated through the altitude, slope and aspect of the site. For Norway spruce, silver fir, Scots pine, European larch, European beech, oak species and ash/maple species it was possible to develop crown width models, which reflect the effects of site characteristics and species composition of the stand. The crown widths of shade-tolerant species reacted mainly positively to admixture, whereas light-demanding species reacted with decreasing crown widths. Coniferous species were not as strongly affected by mixture as broadleaf species.

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A PAISAGEM COMO CONDICIONADORA DE BORDAS DE FRAGMENTOS FLORESTAIS

FLORESTA ◽

10.5380/rf.v35i1.2427 ◽

2005 ◽

Vol 35 (1) ◽

Cited By ~ 7

Author(s):

Bethania Cristiane Herrmann ◽

Efraim Rodrigues ◽

André De Lima

Keyword(s):

Species Composition ◽

Patch Size ◽

Nearest Neighbor ◽

Core Area ◽

Forest Fragments ◽

Spatial Structures ◽

Landscape Index ◽

Area Index ◽

Components Analysis ◽

The Relationship

Fragmentos florestais diferem em sua estrutura espacial afetando a composição de espécies em suas bordas. O objetivo deste trabalho foi analisar a influência dos índices da paisagem sobre as bordas de fragmentos florestais próximos à cidade de Londrina - PR. As características estruturais dos fragmentos aqui consideradas incluem área, forma, área central e índice de área central; e as características estruturais da paisagem: área da classe, tamanho médio e coeficiente de variação do tamanho dos fragmentos de floresta, distância média até o fragmento florestal mais próximo e total de bordas de floresta. A relação entre composição de espécies, fragmentos florestais e índices de paisagem foi estudada através de Análise de Correspondência Canônica. Os índices de maior importância foram: área, forma e área central dos fragmentos. Godoy, fragmento com 2371,14 ha e inclui o Parque Estadual Mata dos Godoy, apresentou maior variação na composição de espécies quando comparado com os demais. The landscape as conditioning of edges of forest fragments Abstract Forests fragments differ in their spatial structure afecting the species composition of edges. The objective of this paper was to analyze the influence of some landscape index over sapling species composition in edges of forests fragments near Londrina - PR. The spatial structures of fragments considered in this paper involved area, shape, core area and core area index; and the spatial structures of landscape: class area, mean patch size, coefficient of variation of the size of the patch (%), mean nearest neighbor distance and total edge of forest. The relationship between sapling species composition, forests fragments and landscape index were evaluated through Principal Components Analysis. Godoy, fragment with 2371,14 ha showed more variation in the species composition when compared with other fragments.

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Community disassembly and disease: realistic—but not randomized—biodiversity losses enhance parasite transmission

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2019.0260 ◽

2019 ◽

Vol 286 (1902) ◽

pp. 20190260 ◽

Cited By ~ 9

Author(s):

Pieter T. J. Johnson ◽

Dana M. Calhoun ◽

Tawni Riepe ◽

Travis McDevitt-Galles ◽

Janet Koprivnikar

Keyword(s):

Species Composition ◽

Host Species ◽

Host Community ◽

Trematode Species ◽

Parasite Transmission ◽

Field Surveys ◽

Larval Amphibians ◽

Experimental Approaches ◽

The Individual ◽

The Relationship

Debates over the relationship between biodiversity and disease dynamics underscore the need for a more mechanistic understanding of how changes in host community composition influence parasite transmission. Focusing on interactions between larval amphibians and trematode parasites, we experimentally contrasted the effects of host richness and species composition to identify the individual and joint contributions of both parameters on the infection levels of three trematode species. By combining experimental approaches with field surveys from 147 ponds, we further evaluated how richness effects differed between randomized and realistic patterns of species loss (i.e. community disassembly). Our results indicated that community-level changes in infection levels were owing to host species composition, rather than richness. However, when composition patterns mirrored empirical observations along a natural assembly gradient, each added host species reduced infection success by 12–55%. No such effects occurred when assemblages were randomized. Mechanistically, these patterns were due to non-random host species assembly/disassembly: while highly competent species predominated in low diversity systems, less susceptible hosts became progressively more common as richness increased. These findings highlight the potential for combining information on host traits and assembly patterns to forecast diversity-mediated changes in multi-host disease systems.

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