scholarly journals Patterns of rare moss diversity and distribution in Alberta

Botany ◽  
2021 ◽  
Author(s):  
René Belland ◽  
Richard T. Caners
Keyword(s):  
Rare Species ◽  
Distribution Patterns ◽  
Common Species ◽  
Annual Rainfall ◽  
Mean Annual Temperature ◽  
Similar Species ◽  
Geographic Scale ◽  
Mountain Landscape ◽  
Mountainous Regions ◽  
Species Groups

Rare moss diversity and distribution patterns are described for the province of Alberta. Multivariate analyses are used to elucidate the distribution patterns of the rare mosses in relation to environmental factors, in comparison with those of the common mosses. Hierarchical clustering of species occurrence among Alberta ecoregions resulted in eleven species groups having similar distributions and four ecoregion groups with similar species composition. Rare and common mosses show comparable distributions at the geographic scale of ecoregions; the analyses did not provide support that rare mosses respond to environment factors differently than common mosses. The rare mosses are more narrowly distributed among the species and ecoregion groups than are common species. The most important environmental variables determining species distributions are mean annual temperature and growing degree days. Other important factors determining moss distribution are mean elevation, annual rainfall, and mountain landscape. Diversity patterns are shown to vary widely among the ecoregions and to differ between rare and common species. Rare species are especially diverse in the Rocky Mountains, which support 81% of the province’s known rare moss flora and reflect a complex of diverse landscapes for moss colonization. Only 40% of known rare species in Alberta are found in non-mountainous regions.

scholarly journals The aridization effect on the characteristics of the substrate and biotopic distribution of fungi species of the Polyporus s.l. genus in the southeast of Western Siberia

2020 ◽  
Vol 9 (1) ◽  
pp. 25-30
Author(s):  
Vyacheslav Aleksandrovich Vlasenko ◽  
Anastasiya Vladimirovna Vlasenko ◽  
Dejidmaa Turmunkh
Keyword(s):  
Rare Species ◽  
Western Siberia ◽  
Common Species ◽  
Biotopic Distribution ◽  
Anthropogenic Habitats ◽  
Mountainous Regions ◽  
Wide Range ◽  
Steppe Communities ◽  
Substrate Specialization ◽  
Mountain Systems

The paper deals with the features of substrate and biotopic distribution of fungi species of the Polyporus s.l. genus in the southeast of Western Siberia. Most species have a wide range of substrates represented by various species of woody plants. The most widespread and common species are able to develop a wide range of substrates. Rare species are distinguished by a narrow substrate spectrum. For a rare species P . rhizophilus , adapted to exist in the conditions of subarid regions, found only in steppe biome communities, steppe grasses ( Stipa , Festuca ) are the only substrate. Most species grow on deciduous wood, only some species can grow on conifers, and only the taiga species P. tubaeformis develops exclusively on conifers in mountainous regions. Fungi substrates are represented by 11 species of angiosperms, 3 species of gymnosperms and steppe grasses. Most species are common in numerous communities; all of them are characterized by a high frequency of occurrence and colonize a wide range of substrates. Biotopically narrowly specialized species are few in number; they are characterized by narrow substrate specialization. In anthropogenic habitats, 6 species out of 14 growing in natural communities were recorded. On the plain territory, 10 species of the genus Polyporus were identified, while 14 species were found in mountain systems, since mountain humid areas contain the largest spectrum of substrates for fungi. The greatest diversity of Polyporus species is recorded in dark coniferous forests, among which the number of species is dominated by black aspen-fir forests. With an increase in aridization and a change in plant communities, rare relict mountain taiga, nemoral and typical taiga species are eliminated. The smallest number of Polyporus species is found in the steppe communities of subarid regions.

scholarly journals Spatial Distribution Patterns and Driving Factors of Plant Biomass and Leaf N, P Stoichiometry on the Loess Plateau of China

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2420
Author(s):  
Zhao Fang ◽  
Xiaoyu Han ◽  
Mingyang Xie ◽  
Feng Jiao
Keyword(s):  
Spatial Distribution ◽  
Loess Plateau ◽  
Plant Biomass ◽  
Distribution Patterns ◽  
Annual Rainfall ◽  
Mean Annual Temperature ◽  
The Loess Plateau ◽  
P Content ◽  
Leaf Stoichiometry ◽  
Leaf N

Understanding the geographic patterns and potential drivers of leaf stoichiometry and plant biomass is critical for modeling the biogeochemical cycling of ecosystems and to forecast the responses of ecosystems to global changes. Therefore, we studied the spatial patterns and potential drivers of leaf stoichiometry and herb biomass from 15 sites spanning from south to north along a 500 km latitudinal gradient of the Loess Plateau. We found that leaf N and P stoichiometry and the biomass of herb plants varied greatly on the Loess Plateau, showing spatial patterns, and there were significant differences among the four vegetation zones. With increasing latitude (decreasing mean annual temperature and decreasing mean precipitation), aboveground and belowground biomass displayed an opening downward parabolic trend, while the root–shoot ratio gradually decreased. Furthermore, there were significant linear relationships between the leaf nitrogen (N) and phosphorus (P) contents and latitude and climate (mean annual rainfall and mean annual temperature). However, the leaf N/P ratio showed no significant latitudinal or climatic trends. Redundancy analysis and stepwise regression analysis revealed herb biomass and leaf N and P contents were strongly related to environmental driving factors (slope, soil P content and latitude, altitude, mean annual rainfall and mean annual temperature). Compared with global scale results, herb plants on the Loess Plateau are characterized by relatively lower biomass, higher N content, lower P content and a higher N/P ratio, and vegetative growth may be more susceptible to P limitation. These findings indicated that the remarkable spatial distribution patterns of leaf N and P stoichiometry and herb biomass were jointly regulated by the climate, soil properties and topographic properties, providing new insights into potential vegetation restoration strategies.

Exploring patterns of commonness and rarity in lichens: a case study from Italy (Southern Europe)

2018 ◽  
Vol 50 (3) ◽  
pp. 385-396 ◽  
Author(s):  
Pier Luigi NIMIS ◽  
Stefano MARTELLOS ◽  
Daniel SPITALE ◽  
Juri NASCIMBENE
Keyword(s):  
Rare Species ◽  
Distribution Patterns ◽  
Common Species ◽  
Ecological Indicator ◽  
Ecological Traits ◽  
Dry Steppe ◽  
Two Factors ◽  
Small Set ◽  
Suitable Habitats

AbstractThis paper, based on data from the latest checklist of Italy, analyzes the distribution patterns of rare and common lichen species within biogeographically homogeneous versus heterogeneous areas of Italy, and the relationships with some main drivers of rarity and commonness. The following data were used: 1) commonness-rarity values of 2565 species in nine ecoregions; 2) frequency of 353 nationally rare and 387 nationally common species in 21 administrative regions. The following functional and ecological traits were considered: growth form, photobiont(s), type of reproduction, substrata, bioclimatic range, ecological indicator values for aridity and eutrophication, and poleophoby. Within each ecoregion, rare species by far outweigh common species but about one third of these are common in other ecoregions. At the level of regional floras, rarity is significantly associated with epiphytic substrata, non-trebouxioid photobionts and high air humidity, while commonness is associated with saxicolous substrata, trebouxioid photobionts and eutrophication. Rarity seems to mainly depend on two factors, bioclimate (many rare species are outside the limit of their bioclimatic optima) and reduced availability of suitable habitats (e.g. old-growth forests), while commonness is mainly related to disturbance (eutrophication, creation of drier habitats). Most of the nationally rare lichens belong to an oceanic-suboceanic element with tropical affinities or to a small set of continental species with their optima in the dry steppe biome, which suggests that many rare species can persist in microrefugia, that is sites with microclimates that support small populations of species beyond the boundaries of the climatic limits of their main distributions.

scholarly journals Macroinvertebrate species occupancy frequency distribution patterns in eutrophic lakes

2021 ◽  
Author(s):  
Jukka Suhonen ◽  
Lauri Paasivirta ◽  
Markus J. Rantala ◽  
Salmela Jukka ◽  
Erna Suutari
Keyword(s):  
Frequency Distribution ◽  
Rare Species ◽  
Species Conservation ◽  
Distribution Patterns ◽  
Common Species ◽  
Dispersal Ability ◽  
Eutrophic Lakes ◽  
High Dispersal ◽  
Important Trait ◽  
Species Occupancy

AbstractMetacommunity models describe species occupancy frequency distribution (hereinafter ‘SOFD’). Our goal is to present how the differences in eight macroinvertebrate orders dispersal ability affect SOFD patterns. A total of 293 species from eight macroinvertebrate orders were observed in 14 eutrophic lakes in southern Finland. Species occupancy ranged from 1 to 14. About 30% (89 out of 293) of the species were found in only one lake, yielding a surprisingly high number of rare species. So, there were few widely distributed common species and numerous rare species with a restricted distribution. Combined data from eight macroinvertebrate orders supported the bimodal truncated SOFD pattern. Similarly, the low dispersal ability orders, watermites and mayflies, fitted the bimodal truncated SOFD pattern. However, bimodal symmetric SOFD pattern also fitted relatively well to the dragonflies and damselflies with high dispersal ability. It seems that differences in dispersal ability among different macroinvertebrate orders may partly explain observed differences. Moreover, our results supported slightly more a niche-based model rather than a metapopulation dynamics model in eutrophic lakes littoral macroinvertebrate metacommunities. Our results highlight that the dispersal ability is important trait for species conservation in patchily distributed habitat.

First data on plasmodial slime moulds (Myxomycetes = Myxogastrea) of Rdeysky Nature Reserve (Novgorod Region, Russia)

2021 ◽  
Vol 55 (2) ◽  
pp. 361-377
Author(s):  
N. I. Borzov ◽  
F. M. Bortnikov ◽  
A. V. Matveev ◽  
V. I. Gmoshinskiy
Keyword(s):  
Species Diversity ◽  
Rare Species ◽  
Nature Reserve ◽  
Common Species ◽  
Slime Moulds ◽  
State Nature Reserve ◽  
Plasmodial Slime Moulds ◽  
State Nature

The results of the first study of the species diversity of myxomycetes of the Rdeysky State Nature Reserve are presented. The 201 field specimens of sporophores belonging to 56 morphospecies from 27 genera, ten families, and six orders were collected from September 30 to October 5, 2020. Fifty-two species of these were new for the Novgorod Region. The most common species at the reserve were Arcyria affinis, Hemitrichia calyculata, Lycogala epidendrum, Metatrichia vesparia, Physarum album, Trichia decipiens, and T. varia. Additionally, detailed morphological descriptions of two rare species Amaurochaete trechispora and Trichia crateriformis are given.

Distribution of moss-inhabiting diatoms along an altitudinal gradient at sub-Antarctic Îles Kerguelen

2007 ◽  
Vol 19 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Niek J.M. Gremmen ◽  
Bart van de Vijver ◽  
Yves Frenot ◽  
Marc Lebouvier
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Altitudinal Gradient ◽  
Cross Validation ◽  
Strong Relationship ◽  
Distribution Patterns ◽  
Common Species ◽  
Important Variable ◽  
Diatom Species ◽  
Expected Species Richness

Altitudinal gradients provide excellent opportunities to study relationships between species distribution and climatic variables. We studied the species composition of 39 samples of moss-inhabiting diatoms, collected at 50 m intervals from 100–650 m above sea level. The samples contained a total of 130 diatom species, of which 51 occurred in 10 or more samples. Altitude appeared to be the most important variable explaining variation in species composition. Of the 51 common species, 33 showed a significant relationship with altitude. Although the majority of the latter declined with increasing altitude, for nine species the probability of occurrence first increased with increasing elevation, but decreased again at higher altitudes, and four species increased systematically with elevation. As a result, expected species richness per sample decreased from an estimated 43 at 100 m to 25 species per sample at 650 m. Diatom distribution patterns proved to be suitable predictors of the altitudinal position of sample sites. Cross-validation yielded a strong relationship between predicted and observed altitudes.

scholarly journals Locally rare species influence grassland ecosystem multifunctionality

2016 ◽  
Vol 371 (1694) ◽  
pp. 20150269 ◽  
Author(s):  
Santiago Soliveres ◽  
Peter Manning ◽  
Daniel Prati ◽  
Martin M. Gossner ◽  
Fabian Alt ◽  
...  
Keyword(s):  
Land Use ◽  
Rare Species ◽  
Common Species ◽  
Ecosystem Functions ◽  
Individual Species ◽  
Conservation Priorities ◽  
Below Ground ◽  
Species Specific ◽  
The Relationship ◽  
Ecosystem Multifunctionality

Species diversity promotes the delivery of multiple ecosystem functions (multifunctionality). However, the relative functional importance of rare and common species in driving the biodiversity–multifunctionality relationship remains unknown. We studied the relationship between the diversity of rare and common species (according to their local abundances and across nine different trophic groups), and multifunctionality indices derived from 14 ecosystem functions on 150 grasslands across a land-use intensity (LUI) gradient. The diversity of above- and below-ground rare species had opposite effects, with rare above-ground species being associated with high levels of multifunctionality, probably because their effects on different functions did not trade off against each other. Conversely, common species were only related to average, not high, levels of multifunctionality, and their functional effects declined with LUI. Apart from the community-level effects of diversity, we found significant positive associations between the abundance of individual species and multifunctionality in 6% of the species tested. Species-specific functional effects were best predicted by their response to LUI: species that declined in abundance with land use intensification were those associated with higher levels of multifunctionality. Our results highlight the importance of rare species for ecosystem multifunctionality and help guiding future conservation priorities.

scholarly journals Ecology of sandflies (Diptera: Psychodidae) in a restricted focus of cutaneous leishmaniasis en Northern Venezuela: I. Description of the study area, catching methods and species composition

1987 ◽  
Vol 82 (1) ◽  
pp. 119-124 ◽  
Author(s):  
M. Dora Feliciangeli
Keyword(s):  
Species Composition ◽  
Cutaneous Leishmaniasis ◽  
Relative Abundance ◽  
Rare Species ◽  
Common Species ◽  
Term Study ◽  
Phlebotomine Sandfly ◽  
Phlebotomine Sandflies ◽  
The Common ◽  
Catching Methods

A study on the ecology of phlebotomine sandfly fauna in a restricted focus of cutaneous leishmaniasis in northern Venezuela was undertaken in order to investigate the species responsible for the transmission. The study area and catching methods for phlebotomine sandflies are described. A total of 9,061 females and 1,662 males were collected during a year-term study. 12 species of Lutzomya and 1 species of Brumptomya sp. were identified. Absolute and relative abundance and ocurrence for each species were determined. The rel ative occurrence allowed to distinguish the common species, viz. L. panamensis, L. ovallesi, L. gomezi, L. tinidadensis, L. atroclavata, L. cayennensis, L. shannoni and L. olmeca bicolor from the rare species vis., L. punctigeniculata, L. rangeliana, L. evansi and L. dubitans. General comments on the species composition of the sandfly fauna in this locality are made.

scholarly journals Herbarium Data on Bryophytes from the Eastern Part of Lithuania (1934–1940) in the Context of Science History and Landscape Changes

Botanica ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 41-53 ◽  
Author(s):  
Ilona Jukonienė ◽  
Monika Subkaitė ◽  
Aurika Ričkienė
Keyword(s):  
Rare Species ◽  
Distribution Patterns ◽  
Herbarium Specimens ◽  
Landscape Changes ◽  
Population Status ◽  
Science History ◽  
Peat Extraction ◽  
Herbarium Data ◽  
The Moment ◽  
Academy Of Sciences

AbstractThe paper deals with bryophytes collected by Polish researchers from the mires in the eastern part of Lithuania in 1934–1940 and deposited at the Herbarium of W. Szafer Institute of Botany, Polish Academy of Sciences (KRAM). The collection provides data on bryophyte diversity and distribution patterns in the mires of Lithuania. The collection (868 specimens) was revised in 2016–2017. Almost 90% of all herbarium specimens were collected by Irena Dąbkowska. The specimens were identified by the collectors themselves or by Polish bryologist Zygmunt Czubiński; 254 specimens of the collection were not identified. After revision, a total of 112 bryophyte species were ascertained in the collection, two of these (Palustriella decipiens and Polytrichum swartzii) have not been reported to Lithuania before. The specimens were collected in 47 localities, the mires in nearly half of them at the moment are disturbed due to drainage or use for peat extraction. Information about the localities of rare species Hamatocaulis vernicosus, Meesia triquetra and Mesoptychia rutheana is valuable for the estimation of their population status.

scholarly journals Observations and  Modelling of Precipitation  in the Southern Alps of  New Zealand

2021 ◽  
Author(s):  
◽  
Stephen John Stuart
Keyword(s):  
New Zealand ◽  
Climate Model ◽  
Regional Climate ◽  
Rain Gauge ◽  
Southern Alps ◽  
Annual Rainfall ◽  
Mean Annual Precipitation ◽  
Mountain Range ◽  
Mountainous Regions ◽  
Orographic Rainfall

<p>Precipitation in the central Southern Alps affects glaciation, river flows and key economic activities, yet there is still uncertainty about its spatial distribution and primary influences. Long-term and future patterns of New Zealand precipitation can be estimated by the HadRM3P regional climate model (RCM) - developed by the United Kingdom Met Office - but orographic rainfall in the steep and rugged topography of the Southern Alps is difficult to simulate accurately at the 30-km resolution of the RCM. To quantify empirical relationships, observations of surface rainfall were gathered from rain gauges covering a broad region of the South Island. In four transects of the Hokitika, Franz Josef and Haast regions, the mean annual precipitation maxima of objectively interpolated profiles are consistently located 7-11 km southeast of the New Zealand Alpine Fault. The magnitude and shape of the rainfall profile across the Southern Alps are strongly influenced by the 850-hPa wind direction to the north of the mountain range, as determined by comparing rain-gauge observations to wind vectors from NCEP/NCAR Reanalysis 1. The observed profile of orographically enhanced rainfall was incorporated into a trivariate spline in order to interpolate precipitation simulated by the RCM. This downscaling method significantly improved the RCM's estimates of mean annual rainfall at stations in the Southern Alps region from 1971 to 2000, and RCM projections of future rainfall in mountainous regions may be similarly refined via this technique. The improved understanding of the observed rainfall distribution in the Southern Alps, as gained from this analysis, has a range of other hydrological applications and is already being used in 'downstream' modelling of glaciers.</p>

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