scholarly journals Segetal flora of the Łuków Plain

2012 ◽  
Vol 64 (2) ◽  
pp. 93-108 ◽  
Author(s):  
Zofia Rzymowska ◽  
Teresa Skrajna
Keyword(s):  
Alien Species ◽  
Rare Species ◽  
Native Species ◽  
Life Form ◽  
Common Species ◽  
Arable Fields ◽  
The Common ◽  
High Share ◽  
Meadow Species ◽  
Segetal Flora

The aim of the study was to characterize and analyze the segetal flora of the Łuków Plain. The study was carried out from 2003 to 2006 in 182 towns and villages. Vascular flora of the arable fields in the area under study consists of 305 species belonging to 39 families and 168 genera. The analysed flora is characterised by the prevalence of native species (64.6%) over alien species (35.4%). Archaeophytes dominate among anthropophytes, whereas meadow species are the most frequent in the group of apophytes. Annuals and biennials show a slight prevalence over perennials. The analysis of the life-form categories shows the dominance of therophytes (52.8%) as well as a relatively high share of hemicryptophytes (34.4%) and geophytes (12.5%). In the analysed flora, rare and very rare species constitute a vast majority (61.7%), whereas the common and very common species reach 13.1%.

scholarly journals Diversity of Segetal Flora in Salix viminalis L. Crops Established on Former Arable and Fallow Lands in Central Poland

Agriculture ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 25
Author(s):  
Maria Janicka ◽  
Aneta Kutkowska ◽  
Jakub Paderewski
Keyword(s):  
Native Species ◽  
Life Form ◽  
Arable Land ◽  
Salix Viminalis ◽  
Central Poland ◽  
Plant Groups ◽  
Fallow Lands ◽  
Historical Group ◽  
Phytosociological Relevés ◽  
Segetal Flora

The flora of willow (Salix viminalis L.) plantations consists of various plant groups, including plants related to arable land, called segetal plants. Knowledge of this flora is important for maintaining biodiversity in agroecosystems. The aim of the study was to assess the segetal flora of the willow plantations in central Poland, depending on the land use before the establishment of the plantations (arable land or fallow) and the age of the plantations. Moreover, the aim was also to check for the presence of invasive, medicinal, poisonous and melliferous species. The vegetation accompanying willow was identified based on an analysis of 60 phytosociological relevés performed using the Braun-Blanquet method. For each species, the following parameters were determined: the phytosociological class; family; geographical and historical group; apophyte origin; biological stability; life-form; and status as an invasive, medicinal (herbs), poisonous or melliferous species. The results were statistically processed. Segetal species accounted for 38% of the flora accompanying willow. The plantations on former arable land were richer in segetal species than those on fallow. Mostly, short-lived and native species dominated. In line with the age of the plantations, the number of segetal species decreased. The share of apophytes increased, and anthropophytes decreased. Furthermore, many valuable plants were found among the flora accompanying willow.

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 Patterns in the alien flora of the Democratic Republic of the Congo: a comparison of Asteraceae and Fabaceae

2020 ◽  
Vol 153 (3) ◽  
pp. 373-389
Author(s):  
Farzaneh Bordbar ◽  
Pierre Meerts
Keyword(s):  
Alien Species ◽  
Native Species ◽  
Life Form ◽  
Democratic Republic ◽  
Geographic Origin ◽  
Life Forms ◽  
Trait Divergence ◽  
Native Flora ◽  
Alien Flora ◽  
Republic Of The Congo

Background and aims – This work provides the first pattern analysis of the alien flora of the Democratic Republic of the Congo (D.R. Congo), using Asteraceae and Fabaceae as a case study. Methods – Based on herbarium collections, existing databases, and literature data, a database of 38 alien species of Asteraceae and 79 alien species of Fabaceae has been assembled. Patterns in the introduction pathway, phylogeny, life form, morpho-functional traits, geographic origin, and occurrence in D.R. Congo are explored. Key results – America is the main source continent in both families, but Asia is also an important donor of Fabaceae. Taxonomic spectrum discrepancies between the alien and the native flora reflect the continent of origin. Sixty-six percent of alien Asteraceae have been accidentally introduced, most of which being annual weeds of disturbed soil. In contrast, 90% of alien Fabaceae have been deliberately introduced for forestry, agriculture, or environmental purposes, most of which being phanerophytes. Traits were compared between pairs of congeneric alien and native species. For Asteraceae, a sharp discrepancy was found in the life form spectrum (aliens: mostly therophytes; natives: phanerophytes). For Fabaceae, alien species had larger leaves and larger pods compared to their native congeners. The number of specimens in collections was positively correlated with the time since the date of first collection for both families. The Guineo-Congolian region has the highest number of alien Fabaceae, while alien Asteraceae are overrepresented in the Zambezian region.Conclusions – Contrasting patterns between alien Asteraceae and Fabaceae in the flora of D.R. Congo in terms of life forms, trait divergence compared to the native flora, and occurrence, reflect the divergent biological attributes and relations to humans of the two families. The striking discrepancies between the two families call for analyses of patterns of alien flora at family level and warn against global generalisations.

scholarly journals Segetal flora of the Wigry National Park

2012 ◽  
Vol 64 (3) ◽  
pp. 119-132 ◽  
Author(s):  
Teresa Skrajna ◽  
Helena Kubicka
Keyword(s):  
Rare Species ◽  
Native Species ◽  
National Park ◽  
Life Forms ◽  
Cereal Crops ◽  
Protected Species ◽  
Number Of Species ◽  
Phytosociological Relevés ◽  
Centaurium Erythraea ◽  
Segetal Flora

Segetal flora of the Wigry National Park (Poland) was studied in the period 2008-2010 within an area occupied by 33 villages. The analysis was based on 195 phytosociological relevés taken in fields of cereal crops, root plants and in stubble fields. The total number of species recorded in agrocenoses was 181 and they represented 36 botanical families. The most numerous families were Asteraceae, Fabaceae and Brasicaceae. The segetal flora of the Wigry National Park included mostly native species of apophytes (53.6%) that predominated over anthropophytes. Among apophytes, meadow apophytes (35 species) and those from waterside habitats (26 species) were noted most often, archaeophytes (74 species) were predominant among anthropophytes, while epecophytes (9 species) and ergasiophytes (1 species) were much less abundant. Among the life forms analysed, therophytes (61.9%) predominated over hemicryptophytes (27.1%) and geophytes (11%). The number of short-lived species in the flora of this Park was much greater (68.5%) than that of perennial ones (31.5%). The flora of the Park included 31 rare species classified in different categories of threat. Among them, <i>Centaurium pulchellum</i> and <i>Centaurium erythraea</i> belong to fully protected species (Dz.U. (Polish Journal of Laws) 2004 No. 168, item 1764).

scholarly journals An updated Checklist of the Marine fishes from Syria with emphasis on alien species

2018 ◽  
Author(s):  
MALEK FARES ALI
Keyword(s):  
Alien Species ◽  
Rare Species ◽  
Common Species ◽  
Economic Importance ◽  
Marine Fishes ◽  
Fishing Gear ◽  
Positive Economic ◽  
The Status ◽  
First Time ◽  
Scarus Ghobban

An updated checklist of marine ichthyofauna that are recorded to date, from Syrian marine water including 297 species (belonging to 220 genera, 111 families, 36 orders, and 3 classes) is presented. Sparidae is the dominant family (28 species), followed by Blenniidae (15 species), while 55 families are represented by 1 species. The Chondrichthyes present in Syria were cross-checked for the first time. The status, frequency, the main fishing gear targeting common species, in addition to the fishing method by which the rare species were caught, are also provided. Four species are recorded for the first time herein: Stomias boa boa (Risso, 1810), Hymenocephalus italicus Giglioli, 1884, Scarus ghobban Forsskal, 1775, and Nettastoma melanurum Rafinesque, 1810. In this inventory, 56 Lessepsian migrant species are also included, with 16 of them being considered as very common and of positive economic importance. Alien species have been grouped into three categories namely established (49 species), casual (2 species), and single records (5 species). Twenty-eight species were disregarded from this list, due to lack of solid documentation on their presence.

scholarly journals Epifauna associated with an introduced crab in the Barents Sea: a 5-year study

2009 ◽  
Vol 67 (2) ◽  
pp. 204-214 ◽  
Author(s):  
Alexander G. Dvoretsky ◽  
Vladimir G. Dvoretsky
Keyword(s):  
Native Species ◽  
Barents Sea ◽  
Common Species ◽  
Red King Crab ◽  
Paralithodes Camtschaticus ◽  
Male And Female ◽  
King Crab ◽  
The Barents Sea ◽  
The Common ◽  
Associated Species

Abstract Dvoretsky, A. G., and Dvoretsky, V. G. 2010. Epifauna associated with an introduced crab in the Barents Sea: a 5-year study. – ICES Journal of Marine Science, 67: 204–214. Species composition, prevalence, intensity, and spatial distribution of macro-invertebrates colonizing the invasive red king crab (Paralithodes camtschaticus) in a typical bay of the Barents Sea, Dalnezelenetskaya Bay (depths 5–40 m), and adjacent deeper water (120–180 m) were examined in the summers of 2004–2008. In all, 43 associated species were found on the crabs. The most common epibionts were Mytilus edulis (Bivalvia), Obelia spp. (Hydrozoa), and Circeis armoricana (Polychaeta). Symbiotic species included Ischyrocerus commensalis and Ischyrocerus anguipes (Amphipoda), Harmothoe imbricata (Polychaeta), and Johanssonia arctica (Hirudinea). There were no significant differences in the prevalence of infestation between male and female crabs. The prevalence of most of the common species was greater in crabs with old shells than in crabs with new shells. Infestation levels of J. arctica were higher in deeper than in shallow water, and M. edulis was less abundant in deep water. All species found on the crabs appear to be native to the Barents Sea. However, I. commensalis amphipods were not found at the site examined before the introduction of the red king crab, indicating that their distribution may have changed after association with this host species. Introduced hosts may well influence the distribution of rare native species.

CXIII. An account of several rare species of barnacles. In a letter to Mr. Isaac Romilly, F. R. S. from John Ellis, Esq; F. R. S.

1757 ◽  
Vol 50 ◽  
pp. 845-855 ◽  
Keyword(s):  
New Species ◽  
Rare Species ◽  
Common Species ◽  
The World ◽  
Different Shapes ◽  
The Common ◽  
Different Parts

Dear Sir, Those rare and very extraordinary new species of Barnacles, which you have lately received from abroad, are so different from any of the common species, that I have seen, that I was resolved to inquire into the nature of an animal, which, like a Proteus, appears in so many different shapes or coverings in different parts of the world.

Regularities of sinantropization processes of the vegetation cover in the cities of the south Cis-Urals (Bashkortostan Republic)

2016 ◽  
pp. 28-36 ◽  
Author(s):  
Ya. M. Golovanov ◽  
L. M. Abramova
Keyword(s):  
Alien Species ◽  
Plant Communities ◽  
Native Species ◽  
Climatic Factors ◽  
Plant Cover ◽  
Anthropogenic Pressure ◽  
Native Plant ◽  
Anthropogenic Transformation ◽  
Native Flora ◽  
The Common

Increase of anthropogenic pressure on nature ecosystems leads to synanthropization of flora and vegetation. A replacement of native species in communities with synanthropic ones, including alien species, takes place as well as a change of native plant communities by synanthropic ones, decrease of biodiversity, simplification of structure, decrease in efficiency and stability of plant communities (Gorchakovskij, 1999). Synanthropization as an indicator of anthropogenic transformation of vegetation is a traditional object of studies (Sudnik-Wojcikowska, 1988; Abramova, 2010; Abramova, Mirkin, 2000; Abramova, Mikhailova, 2003; etc.). The ratio of synanthropic and native flora species for an assessment of synanthropization level is usually used. The assessment of synanthropization level is the most important element of monitoring as it helps to estimate a degree of ecosystems disturbance and to develop a system of their rational use and protection. Processes of synanthropization are most expressed in the towns. The towns are the heterotrophic ecosystems including uniform group of anthropogenically transformed communities formed on the residential, industrial, transport, agrarian, recreational territories where the florogenesis and the phytocoenogenesis are highly specific (Burda, 1991; Ilminskikh, 1993). The urban environment can have the leveling impact on climatic factors therefore the floras of towns in different nature zones quite often have the common features (Ilminskikh, 1993). An increase of a syntaxonomic variety due to destruction of native vegetation is compensated by increase of synanthropic syntaxa number from the synanthropic classes of vegetation, and also communities of aggressive alien species which are combined with species of local flora. The regularities of synanthropization of urban flora and vegetation are less studied (Kowarik, 1990; Burda, 1991; etc.). Due to a growth of urbanization process around the world the studying of anthropogenic transformation of ve­getation cover is required. The article is devoted to the analysis of regularities of synanthropization of plant cover in towns of the southern Cis-Urals belonging to the Southern industrial zone of Bashkortostan Republic. 3 towns — Sterlitamak, Salavat and Ishimbay representing different categories by their population size were chosen for an assessment of synanthropization level.

scholarly journals Abundance distribution of common and rare plant species of Brazilian savannas along a seasonality gradient

2010 ◽  
Vol 24 (2) ◽  
pp. 407-413 ◽  
Author(s):  
Igor Aurélio Silva ◽  
Marcus Vinicius Cianciaruso ◽  
Marco Antônio Batalha
Keyword(s):  
Plant Communities ◽  
Rare Species ◽  
Species Abundance ◽  
Common Species ◽  
Rare Plants ◽  
Abundance Distribution ◽  
Wet Grassland ◽  
Composite Models ◽  
Random Assortment ◽  
The Common

We examined the species abundance distribution (SAD) of plant communities in: (1) a wet grassland, waterlogged throughout most of the year; (2) a seasonal savanna, with an annual dry season; and (3) a hyperseasonal savanna, with alternating drought and waterlogging over the year. We searched for differences in the abundance distributions of all species, as well as of the common and rare species. We tested whether the SADs fitted the lognormal, log-series, power fraction, and random assortment models. We found that environmental constraints may reduce the evenness of plant communities and change the SADs in savannas. We observed a lognormal abundance distribution in the wet grassland and a random abundance distribution in the hyperseasonal cerrado. The SAD of the seasonal savanna did not follow any model. The common species in the three communities were better fitted by the lognormal model. The rare species in the wet grassland and the hyperseasonal cerrado were better fitted by the random assortment model. The SAD of the rare species of the seasonal savanna did not follow any model. Seasonality seems to modify the lognormal distribution of the overall plant community, generating abundance distributions indistinguishable from random. However, differential community structuring between common and rare species may not be affected by seasonality. The different signatures of the abundance distributions of common and rare plants indicate that composite models are better predictors for SADs in savannas.

Diversity of organisms

2018 ◽  
Author(s):  
Philip James
Keyword(s):  
Life Cycle ◽  
Urban Areas ◽  
Native Species ◽  
New Technologies ◽  
Urban Environments ◽  
Green Spaces ◽  
The Common ◽  
Living Organisms ◽  
Micro Organisms ◽  
Diversity Of Life

The focus of this chapter is an examination of the diversity of living organisms found within urban environments, both inside and outside buildings. The discussion commences with prions and viruses before moving on to consider micro-organisms, plants, and animals. Prions and viruses cause disease in plants and animals, including humans. Micro-organisms are ubiquitous and are found in great numbers throughout urban environments. New technologies are providing new insights into their diversity. Plants may be found inside buildings as well as in gardens and other green spaces. The final sections of the chapter offer a discussion of the diversity of animals that live in urban areas for part or all of their life cycle. Examples of the diversity of life in urban environments are presented throughout, including native and non-native species, those that are benign and deadly, and the common and the rare.

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