Floristic composition of oak forests and oriental hornbeam scrubs on mt. Vidlič in the first three years after a wildfire

After a catastrophic wildfire on Vidlič Mountain in 2007, which among other things burned oak forests and hornbeam scrubs, their floristic composition was monitored for three years. Phytosociological surveys were carried out in the field using the Braun-Blanquet method, and the results are presented in the form of a synthetic phytosociological table. It was observed that in the stands in which the vegetation was only partially damaged, a shorter recovery time was required to return to the previous state - as it was before the wildfire. The initial stages of vegetation recovery at sites where complete destruction of vegetation occurred were characterized by a strong presence of annual therophytes: Orlaya grandiflora, Sideritis montana, Geranium dissectum, Althaea hirstuta. The first year after the wildfire was characterized by the dominance of annual species of Bupleurum praealtum, Crepis setosa and Centaurea calcitrap, which were not recorded in the monitored stands in the second and third year after the wildfire. In the second and third year after the wildfire, perennial plants and various grass species assumed dominance. It is necessary to conduct further systematic and continuous monitoring of the floristic composition and structure of the oak forests that completely burned in the wildfire, as well as an analysis of the profitability of the restitution of oak forests damaged by forest fires in Serbia.

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Stand structure and growth form of the birch transition community in an industrially damaged ecosystem, Sudbury, Ontario

Canadian Journal of Forest Research ◽

10.1139/x85-131 ◽

1985 ◽

Vol 15 (5) ◽

pp. 809-817 ◽

Cited By ~ 19

Author(s):

G. I. James ◽

G. M. Courtin

Keyword(s):

Forest Fires ◽

Growth Form ◽

Stand Structure ◽

Floristic Composition ◽

Past Century ◽

Morphological Development ◽

Metal Mining ◽

Composition And Structure ◽

Woodland Regeneration ◽

Crown Dieback

The anthropogenic birch transition community has developed in the vicinity of Sudbury, Ont., as a result of base-metal mining and smelting, logging, and forest fires over the past century. This study investigates the floristic composition and structure of an exposed ridge site and a protected woodland site in this community, a coppice woodland dominated by Betulapapyrifera Marsh. and Acerrubrum L. For convenience in the field, vegetation was classified into growth forms I to V on the basis of morphological development and stem diameter to separate multiple-stemmed stools from single-stemmed individuals and seedlings from saplings of seedling size but older than 1 year. The ridge was dominated by small stools (growth form II) of B. papyrifera, whereas both large stools (growth form I) and small stools of B. papyrifera and A. rubrum characterized the woodland. No A. rubrum and only a few B. papyrifera seedlings became established at the ridge. Seedlings that survive develop into growth form II while still less than 1 m high. At the woodland, regeneration also was low, but A. rubrum seedlings were more frequent than those of B. papyrifera. Lack of seedlings, the persistence of coppicing, and periodic crown dieback maintain this coppice woodland in its present form so that little change with time is expected.

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Urbanization effects on the composition and structure of macrophytes communities in a lotic ecosystem of Pernambuco State, Brazil

Brazilian Journal of Biology ◽

10.1590/1519-6984.03515 ◽

2016 ◽

Vol 76 (4) ◽

pp. 888-897 ◽

Cited By ~ 4

Author(s):

L. R. C. C. Xavier ◽

F. Scherner ◽

D. C. Burgos ◽

R. C. Barreto ◽

S. M. B. Pereira

Keyword(s):

Urban Areas ◽

Floristic Composition ◽

Freshwater Ecosystems ◽

Metropolitan Region ◽

Macrophyte Communities ◽

Composition And Structure ◽

Lotic Ecosystem ◽

Dry Seasons ◽

Urbanized Areas ◽

Wet And Dry Seasons

Abstract Population growth in urban areas changes freshwater ecosystems, and this can have consequences for macrophyte communities as can be seen in the municipalities that border the Capibaribe River, Pernambuco, Brazil. This study reports the effects of urbanization on the composition and structure of macrophyte communities in areas along that river. The following urbanized and non-urbanized sampling sites were chosen: Sites 1 and 2 (municipality of Santa Cruz do Capibaribe), Sites 3 and 4 (municipality of Toritama), and Sites 5 and 6 (metropolitan region of Recife). These sites were visited every two months from January to July 2013 to observe seasonal variation (wet and dry seasons). Thirty-one species were identified. Generally, the non-urbanized sites had a higher number of species. Multivariate analyses indicated significant overall differences between urbanized and non-urbanized areas (R = 0.044; p < 0.001) and between seasons (R = 0.018; p < 0.019). Owing to the large variation in physical, chemical, and biological characteristics between urbanized and non-urbanized areas, we found that urbanization significantly influenced the floristic composition and structure of macrophyte communities.

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Community Arctio-Artemisetum vulgaris (Tx. 1942) Oberd. et al. 1967.: The most widespread ruderal community at Pancevacki rit

Pesticidi i fitomedicina ◽

10.2298/pif0902113s ◽

2009 ◽

Vol 24 (2) ◽

pp. 113-121

Author(s):

Radmila Stankovic-Kalezic ◽

Slobodan Jovanovic ◽

Vaskrsija Janjic ◽

Ljiljana Radivojevic

Keyword(s):

Floristic Composition ◽

Anthropogenic Influences ◽

Composition And Structure

A several-year investigation of distribution, phytocoenological differentiation, floristic composition and structure of the ruderal flora and vegetation, and relative anthropogenic influences was conducted in the area of Pancevacki rit. The study focused on the ruderal community Arctio-Artemisetum vulgaris, the most widespread of 10 ruderal communities identified in a detailed phytocoenological analysis of the location of Pancevacki rit.

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Ruderal succession starting at different seasons

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1986.036 ◽

2014 ◽

Vol 55 (3) ◽

pp. 403-419 ◽

Cited By ~ 9

Author(s):

Reinhard Bornkamm

Keyword(s):

Poa Pratensis ◽

Floristic Composition ◽

Clayey Loam ◽

First Year ◽

Conyza Canadensis ◽

Senecio Vulgaris ◽

Different Seasons ◽

Winter Annual ◽

Second Year ◽

Different Soils

Succession experiments were carried out in 1 m2 sized plots on three different soils (S = sand. SCL = silty clayey loam, CL = clayey loam). Vegetation was allowed to grow for 9 years, starting at different dates between 18.06.1969 and 1.04.1971. The greatest part of the variation of floristic composition and cover was brought about by the different soils. Direct effects of the starting season were detected only in the first two years. On sand in the first year the winter annual Conyza canadensis was well developed on the plots that had started in spring, but was poorly developed on the summer and fall plots. In the second year it decreased in the spring plots but increased in the summer and fall plots. The same was true for the winter annual Sonchus asper on CL. On SCL, however., Senecio vulgaris, belonging to the therophyta epeteia (overwintering in summer habit), was well developed in both the spring and summer plots, and showed an increase towards the second year in the fall plots only. In the later years of the experiment plots that had been started early in the year mostly were dominated by Poa pratensis ssp. angustifolia (or Quercus rubra), whereas plots that had been started late in the year mostly were dominated by Solidagn canadensis together with Artemsia vulgaris. The analyses of the transition events between the (sub)dominant species showed a variety of replacement patterns, but no determinated series of species following each other. It remains, therefore, unclear in what manner the differentiation between the terminal dominants may be related to the starting season.

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Composition and community structure of mangroves distributed on the east coast of Marajó Island, Brazil

10.21203/rs.3.rs-1196739/v1 ◽

2022 ◽

Author(s):

Barbara Luzia Santos de Oliveira Faro ◽

Priscila Sanjuan de Medeiros-Sarmento ◽

Norma Ely Santos Beltrão ◽

Paulo Weslem Portal Gomes ◽

Ana Cláudia Caldeira Tavares-Martins

Keyword(s):

Floristic Composition ◽

Distribution Patterns ◽

Major Influence ◽

Structural Development ◽

Black Water ◽

Composition And Structure ◽

Marine System ◽

Marajó Island ◽

White Water ◽

Degree Of Similarity

Abstract Mangroves in the Amazon are influenced by several environmental conditions that determine the composition and structural development of the arboreal flora, which results in different distribution patterns. In this study, we sought to answer two questions: (1) what is the composition and structure of the mangroves near the mouth of the Amazon River in Marajó Island? (2) Are the fringe and inland mangroves more similar or dissimilar in terms of floristic composition? For this, we delimited a fringe zone and an inland zone about 1 km apart from each other. In each zone, we distributed five 400-m2 plots. The individuals were grouped into diameter and height classes and structural and phytosociological parameters were calculated. Ten species were recorded in the mangroves, of which seven are typical of white-water (várzea) and black-water (igapó) flooded forest ecosystems. We believed the adjacent ecosystems and the hydrological network are inducing the establishment of such species. The composition and structure of mangroves did not differ statistically between zones, and the degree of similarity may be a result of similar environmental factors in these zones such as low relief and high frequency of macrotides. We conclude that the vegetation of the studied mangroves has a major influence of the fluvial-marine system of the great rivers of the Amazon associated with a diversity of ecosystems that, together, generate greater floristic richness when compared to mangroves in other regions.

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Impacts of dialysis adequacy and intradialytic hypotension on changes in dialysis recovery time

BMC Nephrology ◽

10.1186/s12882-020-02187-9 ◽

2020 ◽

Vol 21 (1) ◽

Author(s):

Murilo Guedes ◽

Roberto Pecoits-Filho ◽

Juliana El Ghoz Leme ◽

Yue Jiao ◽

Jochen G. Raimann ◽

...

Keyword(s):

Odds Ratio ◽

Lower Risk ◽

Recovery Time ◽

First Year ◽

Intradialytic Hypotension ◽

Dialysis Adequacy ◽

Dialysis Treatment ◽

Fluid Removal ◽

Lower Likelihood ◽

Adjusted Logistic Regression

Abstract Background Dialysis recovery time (DRT) surveys capture the perceived time after HD to return to performing regular activities. Prior studies suggest the majority of HD patients report a DRT > 2 h. However, the profiles of and modifiable dialysis practices associated with changes in DRT relative to the start of dialysis are unknown. We hypothesized hemodialysis (HD) dose and rates of intradialytic hypotension (IDH) would associate with changes in DRT in the first years after initiating dialysis. Methods We analyzed data from adult HD patients who responded to a DRT survey ≤180 days from first date of dialysis (FDD) during 2014 to 2017. DRT survey was administered with annual KDQOL survey. DRT survey asks: “How long does it take you to be able to return to your normal activities after your dialysis treatment?” Answers are: < 0.5, 0.5-to-1, 1-to-2, 2-to-4, or > 4 h. An adjusted logistic regression model computed odds ratio for a change to a longer DRT (increase above DRT > 2 h) in reference to a change to a shorter DRT (decrease below DRT < 2 h, or from DRT > 4 h). Changes in DRT were calculated from incident (≤180 days FDD) to first prevalent (> 365-to- ≤ 545 days FDD) and second prevalent (> 730-to- ≤ 910 days FDD) years. Results Among 98,616 incident HD patients (age 62.6 ± 14.4 years, 57.8% male) who responded to DRT survey, a higher spKt/V in the incident period was associated with 13.5% (OR = 0.865; 95%CI 0.801-to-0.935) lower risk of a change to a longer DRT in the first-prevalent year. A higher number of HD treatments with IDH episodes per month in the incident period was associated with a 0.8% (OR = 1.008; 95%CI 1.001-to-1.015) and 1.6% (OR = 1.016; 95%CI 1.006-to-1.027) higher probability of a change to a longer DRT in the first- and second-prevalent years, respectively. Consistently, an increased in incidence of IDH episodes/months was associated to a change to a longer DRT over time. Conclusions Incident patients who had higher spKt/V and less sessions with IDH episodes had a lower likelihood of changing to a longer DRT in first year of HD. Dose optimization strategies with cardiac stability in fluid removal should be tested.

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Emergence characteristics of four annual weed species

Weed Science ◽

10.1017/s0043174500092298 ◽

1999 ◽

Vol 47 (5) ◽

pp. 578-584 ◽

Cited By ~ 96

Author(s):

Robert G. Hartzler ◽

Douglas D. Buhler ◽

David E. Stoltenberg

Keyword(s):

Initial Time ◽

Grass Species ◽

First Year ◽

Weed Species ◽

Emergence Period ◽

Seed Sources ◽

Amaranthus Rudis ◽

Eriochloa Villosa ◽

Broadleaf Species ◽

Emergence Date

Emergence characteristics, including initial time of emergence, magnitude of emergence, and mean time of emergence, ofAmaranthus rudisSauer,Setaria faberiHerrm.,Eriochloa villosa(Thunb.) Kunth, andAbutilon theophrastiMedik. were studied in central Iowa during the first 3 yr following burial of seed collected and buried in the fall of 1994 or 1995. Although the initial emergence date varied among years, the emergence sequence among species was consistent.Eriochloa villosaand A.theophrastiwere the first species to emerge, with initial emergence occurring between April 28 and May 10. Initial emergence dates for these species were the same, except for 1995 whenA. theophrastiemerged 4 d prior toE. villosa. Amaranthus rudiswas the last species to emerge, with initial emergence ranging from 5 to 25 d afterA. theophrasti.First-year emergence in 1995 was 8% forA. theophrasti, 7% for A.rudis, 41% forE. villosa, and 33% forS. faberi, based on the number of buried seed. Proportional emergence during the first year following burial in 1996 was similar to 1995 forA. theophrastiandS. faberi, but greater emergence was observed in 1996 forE. villosaandA. rudis.During the 3 yr of both studies, cumulative emergence of the two grass species (43 to 71%) was higher than for the broadleaf species (13 to 35%). A high percentage of the total annual emergence ofE. villosaoccurred within the first 2 wk of initial emergence, whereas a high percentage ofA. rudisemergence occurred late in its emergence period. Emergence characteristics of the four species were consistent among years and seed sources.

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Az endoszkópos regiszterek szerepe a minőségi betegellátásban. Az új magyar Endoszkópos Retrográd Cholangiopancreatographia (ERCP) Regiszter első eredményei

Orvosi Hetilap ◽

10.1556/650.2018.31145 ◽

2018 ◽

Vol 159 (37) ◽

pp. 1506-1515 ◽

Cited By ~ 1

Author(s):

Dániel Pécsi ◽

Péter Hegyi ◽

Andrea Szentesi ◽

Szilárd Gódi ◽

Ferenc Pakodi ◽

...

Keyword(s):

Quality Indicators ◽

Continuous Monitoring ◽

Gastrointestinal Endoscopy ◽

Late Complications ◽

First Year ◽

Free Text ◽

Data Collecting ◽

Clinically Significant ◽

American Society ◽

Collecting System

Abstract: Introduction: The continuous monitoring of quality indicators in gastrointestinal endoscopy has become an essential requirement nowadays. Most of these data cannot be extracted from the currently used free text reports, therefore a structured web-based data-collecting system was developed to record the indicators of pancreatobiliary endoscopy. Aim: A structured data-collecting system, the ERCP Registry, was initiated to monitor endoscopic retrograde cholangiopancreatography (ERCP) examinations prospectively, and to verify its usability. Method: From January 2017, all ERCPs performed at the First Department of Medicine, University of Pécs, have been registered in the database. In the first year, the detailed data of 595 examinations were entered into the registry. After processing these data, the testing period of the registry is now finished. Results: On 447 patients, 595 ERCPs were performed. The success rate of cannulation is 93.8% if all cases are considered. Difficult biliary access was noted in 32.1% of patients with native papilla, and successful cannulation was achieved in 81.0% of these cases during the first procedure. Post-ERCP pancreatitis was observed in 13 cases (2.2%), clinically significant post-papillotomy bleeding was registered in 2 cases (0.3%), while 27 patients (4.5%) developed temporary hypoxia during the procedure. 30-day follow-up was successful in 75.5% of the cases to detect late complications. All of the quality indicators determined by the American Society of Gastrointestinal Endoscopy (ASGE) were possible to monitor with the help of the registry. Our center already complies with most of these criteria. Conclusions: Continuous monitoring of the quality indicators of endoscopic interventions are not supported by the current hospital information system but it became possible with our registry. The ERCP Registry is a suitable tool to detect the quality of patient care and also useful for clinical research. Several endoscopy units have joined already this initiative and it is open for further centres through our web page ( https://tm-centre.org/hu/regiszterek/ercp-regiszter/ ). Orv Hetil. 2018; 159(37): 1506–1515.

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Use of water by six grass species. 1. Dry-matter yields and response to irrigation

The Journal of Agricultural Science ◽

10.1017/s002185960008607x ◽

1979 ◽

Vol 93 (1) ◽

pp. 13-24 ◽

Cited By ~ 23

Author(s):

E. A. Garwood ◽

K. C. Tyson ◽

J. Sinclair

Keyword(s):

Perennial Ryegrass ◽

Tall Fescue ◽

Field Capacity ◽

Italian Ryegrass ◽

Grass Species ◽

First Year ◽

Full Irrigation ◽

Yield And Quality ◽

Second Year

SUMMARYThe yield and quality of herbage produced by six grasses (perennial ryegrass, cocksfoot, timothy, rough-stalked meadow grass, tall fescue and Italian ryegrass) were examined both without irrigation and under two irrigation regimes. Water was applied according to the potential soil water deficit (potential SWD): the soil was either partially returned to field capacity (FC) after each cut or fully returned to FC whenever the potential SWD reached 25 mm. The swards were cut either at 3 (C3) or 6 (C6) week intervals over a 2 year period.Partial irrigation increased yields by 12–14% in the first year and by 36–58% in the second. Full irrigation produced little more growth than partial irrigation in the first year (maximum SWD, 188 mm) but increased yield by 78–93% in the second, very dry, year (maximum SWD, 311 mm). Under treatment C3 response per unit of water applied was similar with both partial and full irrigation, but under C6 the response was greater with partial (2·86 kg D.M./m3) than with full irrigation (1·79 kg D.M./m3).There were marked differences between the species in their ability to grow under drought conditions in the second year of the experiment. Without irrigation, roughstalked meadow grass and Italian ryegrass did not survive the drought. The performance of tall fescue was markedly superior to both perennial ryegrass and cocksfoot in these conditions. Of the surviving grasses timothy made least growth.

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Dispersal and establishment of slender thistle, Carduus pycnocephalus L. as affected by ground cover

Australian Journal of Agricultural Research ◽

10.1071/ar9850791 ◽

1985 ◽

Vol 36 (6) ◽

pp. 791 ◽

Cited By ~ 1

Author(s):

AR Harradine

Keyword(s):

Seed Dispersal ◽

Seedling Establishment ◽

Ground Cover ◽

The Other ◽

Grass Species ◽

First Year ◽

Parent Plant ◽

Annual Grass

After 3 years of spread from sown infestations, slender thistle density in spring was 0.12 and 4.67 plants m-2 for plots in which the ground cover was dominated by cocksfoot and annual grass species, respectively. On plots maintained free of plants other than slender thistle ('bare plots'), the corresponding density was 47.31 plants m-2. Slender thistle seed was dispersed at least 10 m from the parent plant in the first year of seeding and plants were evenly spread over the bare plots after 2 years. After 3 years, slender thistle ingress was still occurring on the other plots. The results indicate the importance of ground cover, either of living plants or of litter, in reducing seedling establishment and seed dispersal of slender thistle.

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