scholarly journals Ecological Ordination and Distribution of Hygrophilous Species Growing on a Mediterranean Riverbank (SW Spain)

2012 ◽  
Vol 40 (2) ◽  
pp. 22 ◽  
Author(s):  
Francisco GOMEZ MERCADO ◽  
Esther GIMENEZ LUQUE ◽  
Enrique LOPEZ CARRIQUE ◽  
Sergio DE HARO LOZANO ◽  
Fernando DEL MORAL TORRES
Keyword(s):  
Salt Marshes ◽  
Environmental Variables ◽  
Floristic Composition ◽  
Mediterranean Rivers ◽  
Data Set ◽  
Ecological Requirements ◽  
Riparian Plant Communities ◽  
Physical And Chemical ◽  
The Impact ◽  
Riparian Plant

The Guadiamar riverbanks are home to riparian plant communities, such as alder, poplar and ash forests, tamujares, salt marshes,reed beds, etc. characteristic of Mediterranean rivers. A data set of these communities, including floristic relevés and environmentalvariables (physical and chemical soil properties, bioclimate) was analysed to correlate their floristic composition/species distributionwith environmental variables. By means of an RDA (redundancy analysis) and a complementary cluster analysis four groups of specieswere discriminated according to their ecological requirements. The RDA displayed three major, parallel-running gradients (i.e., textural,bioclimatic and chemical) in environmental variables. Other less conspicuous, crossed gradients revealed the impact of man-madealterations, particularly in the middle reaches of the river. The results can be helpful in the planning of future ecologically orientedrestoration programmes of wetlands.

Importance of hydrochory in structuring plant communities along rivers

1991 ◽  
Vol 69 (12) ◽  
pp. 2631-2633 ◽  
Author(s):  
Christer Nilsson ◽  
Maria Gardfjell ◽  
Gunnel Grelsson
Keyword(s):  
Species Composition ◽  
Plant Communities ◽  
Current Velocity ◽  
Environmental Variables ◽  
Riparian Vegetation ◽  
Small Scale ◽  
Water Dispersal ◽  
Seed Deposition ◽  
Riparian Plant Communities ◽  
Riparian Plant

Using wooden cubes as experimental seed mimics we tested whether differences in seed deposition among riverbank sites predictably affect the structure of riparian vegetation. Although cube deposition was not interpretable in terms of environmental variables like current velocity, riverbank width, and substrate, it was related to species composition of the riparian vegetation. We found an excess of species with short-floating seeds among those that were most frequent in sites capturing few cubes and an excess of species with long-floating seeds among those that were most frequent in sites capturing many cubes. This result provides the first evidence that water dispersal interacting with floating time may play a role in small-scale structuring of riparian plant communities. Key words: floating time, hydrochory, riparian vegetation, river, seed mimics, seed deposition.

scholarly journals The Tall-Herb and Tall-Grass Plant Communities of the Class Mulgedio-Aconitetea in the Subalpine Belt of the Krivánska Malá Fatra MTS (Slovakia)

Hacquetia ◽  
2008 ◽  
Vol 7 (2) ◽  
pp. 141-159
Author(s):  
Ivana Šibíková ◽  
Jozef Šibík ◽  
Ivan Jarolímek
Keyword(s):  
Plant Communities ◽  
Environmental Variables ◽  
Diversity Index ◽  
Floristic Composition ◽  
Numerical Classification ◽  
Indicator Values ◽  
Tall Grass ◽  
Data Set ◽  
Subalpine Belt ◽  
Wiener Diversity Index

The Tall-Herb and Tall-Grass Plant Communities of the ClassMulgedio-Aconiteteain the Subalpine Belt of the Krivánska Malá Fatra MTS (Slovakia)The following paper reports the results of phytosociological research of tall-herb and tall-herb plant communities within the classMulgedio-Aconiteteain the subalpine belt of the Krivánska Malá Fatra Mts. The data set of 209 relevés was sampled and analysed using numerical classification and ordination. Major ecological gradients were interpreted using Ellenberg's indicator values and the Shannon-Wiener diversity index. Ten associations within five alliances were distinguished and characterised:Aconitetum firmi, Digitali ambiguae-Calamagrostietum arundinaceae, Helianthemo grandiflorae-Calamagrostietum arundinaceae, Potentillo aurei-Calamagrostietum arundinaceae, Allio victorialis-Calamagrostietum villosae, Festucetum carpaticae, Adenostylo alliariae-Athyrietum alpestris, Aconito firmi-Adenostyletum alliariae, Geranio robertiani-Delphinietum elatiandAconito firmi-Rumicetum alpini.Relationships between the floristic composition of the communities and environmental variables were analysed by canonical correspondence analysis.

scholarly journals Evaluation of Mountain Pastures Quality Forming the Landscape Archetype in Western Carpathians

2019 ◽  
Vol 67 (1) ◽  
pp. 111-119
Author(s):  
Ján Novák ◽  
Juraj Hreško ◽  
Ľuboš Vadel
Keyword(s):  
Slovak Republic ◽  
Floristic Composition ◽  
Vegetation Period ◽  
Western Carpathians ◽  
Forest Zone ◽  
Data Set ◽  
Average Value ◽  
Forage Value ◽  
Varied Composition ◽  
The Impact

The research of pastures influenced by Carpathian sheep milk farming as a typical archetype was conducted in study areas of the mountain even subalpine landscape in the forest zone of the Western Carpathians in the Slovak Republic. We have chosen 28 areas that have been effected by mountain sheep farming since the period of the Wallachian colonization. The research works were under way from 1998 to 2016. The pastures of observation were from 615 to 1 421 meters above sea level (m a.s.l.) in the areas of 1 398 ha in total that was of various exposition and inclination, from flat surface to steep hillsides with 28° slope. The studied pastures ranged from the species‑rich to species‑poor, from Festuca‑Agrostis grasslands through Nardo‑Agrostion tenuis alliance to Nardion. The number of plant species (from 18 to 48, average 33 at 1 m2) shows a rather varied composition of grasslands. There were only two study sites with higher dominance of Festuca rubra (51 % and 64 %) recorded. The quality of grassland depends on the floristic composition (cover in %) and forage value of the particular species. Evaluation of the grassland quality (EGQ) reached the average value 57.5 in the scale from 0 to 100. Value varied from least valuable grasslands with 40.1 points in two study plots to valuable grasslands with 69.4 points. Relations between selected environmental factors were analysed by means of redundancy analysis (RDA). Among the significant factors of environment, the impact on data set variability was the strongest by altitude (18.1 %), then by total precipitation in the vegetation period (5.6 %) and grassland quality EGQ (5.2 %).

scholarly journals New, Rare and Constant Habitats for Endangered Aquatic Plant Communities: The Importance of Microhabitats for Global biodiversity

Diversity ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 96 ◽  
Author(s):  
Krzysztof Spałek ◽  
Jarosław Proćków
Keyword(s):  
Plant Communities ◽  
Aquatic Plant ◽  
Floristic Composition ◽  
Ecological Requirements ◽  
Plant Associations ◽  
Rare And Endangered ◽  
Chemical Factors ◽  
Global Biodiversity ◽  
Water Plants ◽  
Physical And Chemical

Natural water reservoirs are very valuable floristic sites, with springs particularly important for the preservation of floral biodiversity. This paper presents, as a case study, a community of water plants that is new to limnocrene karst springs in Europe: Potametum alpini (Potametea), found in Poland. The paper provides the floristic composition and ecological requirements of this plant association, which is rare and endangered in Europe. According to our knowledge, the habitat data presented here are unique as they are published for the first time for this plant community, and thus it is currently not possible to compare them with data from other authors. Our study confirms the importance of rare microhabitats for global biodiversity. Research on as yet unknown physical and chemical factors limiting the range and development of patches of different plant associations should be conducted intensively, because plant communities, including rare, endangered and protected examples, are an important element of biodiversity at both continental and local scales. All the issues discussed in the paper (rare microhabitats, endangered aquatic plant communities, global biodiversity) are important because they are related to the conservation and management of inland waters.

scholarly journals Influence of diversion power stations on riparian plant communities along Dicun stream China

2021 ◽  
Author(s):  
Rong Sun ◽  
Yarong Zheng ◽  
Xing Xiao
Keyword(s):  
Diversity Index ◽  
Operation Time ◽  
Species Number ◽  
Power Station ◽  
Riparian Plants ◽  
Power Stations ◽  
Riparian Plant Communities ◽  
The Impact ◽  
Riparian Plant ◽  
Water Borne

This article used three diversion power stations with different operating years along Dicun stream of the source of Jiulong River to study the riparian plant community and discussed the impact of power station development on riparian plants. The results showed that:(1)There were significant differences in the plant diversity of herbs, shrubs and trees among all sample plots in the study area (P < 0.05).(2) The species number of the second and third diversion power stations with longer operation time was larger than that of the fourth diversion power station with short operation time.(3) The water-borne plants were concentrated in the herb layer in the influence area of the diversion power station, and the Richness, Shannon- Wiener, Simpson and Pielou indexes of water-borne plants in the study area were significantly different (P < 0.05). (4) The appearance of diversion power station leaded to the change of environmental factors, and the river depth and flow rate had significant positive correlation with the diversity index of riparian plants and water water-borne plants (P < 0.05). In general, with the increase of the operation time of the power station, the surrounding riparian plant will form a new stable community.

Age at Exposure to Parental Suicide and the Subsequent Risk of Suicide in Young People

Crisis ◽  
2018 ◽  
Vol 39 (1) ◽  
pp. 27-36 ◽  
Author(s):  
Kuan-Ying Lee ◽  
Chung-Yi Li ◽  
Kun-Chia Chang ◽  
Tsung-Hsueh Lu ◽  
Ying-Yeh Chen
Keyword(s):  
Young People ◽  
Proportional Hazards ◽  
Proportional Hazards Model ◽  
Cox Proportional Hazards ◽  
Cox Proportional Hazards Model ◽  
Birth Registry ◽  
Data Set ◽  
Parental Suicide ◽  
The Impact ◽  
Age At Exposure

Abstract. Background: We investigated the age at exposure to parental suicide and the risk of subsequent suicide completion in young people. The impact of parental and offspring sex was also examined. Method: Using a cohort study design, we linked Taiwan's Birth Registry (1978–1997) with Taiwan's Death Registry (1985–2009) and identified 40,249 children who had experienced maternal suicide (n = 14,431), paternal suicide (n = 26,887), or the suicide of both parents (n = 281). Each exposed child was matched to 10 children of the same sex and birth year whose parents were still alive. This yielded a total of 398,081 children for our non-exposed cohort. A Cox proportional hazards model was used to compare the suicide risk of the exposed and non-exposed groups. Results: Compared with the non-exposed group, offspring who were exposed to parental suicide were 3.91 times (95% confidence interval [CI] = 3.10–4.92 more likely to die by suicide after adjusting for baseline characteristics. The risk of suicide seemed to be lower in older male offspring (HR = 3.94, 95% CI = 2.57–6.06), but higher in older female offspring (HR = 5.30, 95% CI = 3.05–9.22). Stratified analyses based on parental sex revealed similar patterns as the combined analysis. Limitations: As only register-­based data were used, we were not able to explore the impact of variables not contained in the data set, such as the role of mental illness. Conclusion: Our findings suggest a prominent elevation in the risk of suicide among offspring who lost their parents to suicide. The risk elevation differed according to the sex of the afflicted offspring as well as to their age at exposure.

State Medical Boards' Perceptions of a Minimum Data Set and Current Practices for Collecting Physician Information

2013 ◽  
Vol 99 (4) ◽  
pp. 40-45 ◽  
Author(s):  
Aaron Young ◽  
Philip Davignon ◽  
Margaret B. Hansen ◽  
Mark A. Eggen
Keyword(s):  
Media Coverage ◽  
The United States ◽  
Minimum Data Set ◽  
Direct Patient Care ◽  
Physician Workforce ◽  
Data Set ◽  
Minimum Data ◽  
State Medical Boards ◽  
The Impact ◽  
Current Practices

ABSTRACT Recent media coverage has focused on the supply of physicians in the United States, especially with the impact of a growing physician shortage and the Affordable Care Act. State medical boards and other entities maintain data on physician licensure and discipline, as well as some biographical data describing their physician populations. However, there are gaps of workforce information in these sources. The Federation of State Medical Boards' (FSMB) Census of Licensed Physicians and the AMA Masterfile, for example, offer valuable information, but they provide a limited picture of the physician workforce. Furthermore, they are unable to shed light on some of the nuances in physician availability, such as how much time physicians spend providing direct patient care. In response to these gaps, policymakers and regulators have in recent years discussed the creation of a physician minimum data set (MDS), which would be gathered periodically and would provide key physician workforce information. While proponents of an MDS believe it would provide benefits to a variety of stakeholders, an effort has not been attempted to determine whether state medical boards think it is important to collect physician workforce data and if they currently collect workforce information from licensed physicians. To learn more, the FSMB sent surveys to the executive directors at state medical boards to determine their perceptions of collecting workforce data and current practices regarding their collection of such data. The purpose of this article is to convey results from this effort. Survey findings indicate that the vast majority of boards view physician workforce information as valuable in the determination of health care needs within their state, and that various boards are already collecting some data elements. Analysis of the data confirms the potential benefits of a physician minimum data set (MDS) and why state medical boards are in a unique position to collect MDS information from physicians.

The Impact of Green Labels on U.S. Hotel Net Operating Income: Operating Statements Analyses

2019 ◽  
Vol 11 (1) ◽  
pp. 156-173
Author(s):  
Spenser Robinson ◽  
A.J. Singh
Keyword(s):  
Environmental Design ◽  
Green Buildings ◽  
Small Sample ◽  
Sample Survey ◽  
Data Set ◽  
Operating Income ◽  
Energy Star ◽  
The Impact ◽  
Industry Professionals

This paper shows Leadership in Energy and Environmental Design (LEED) certified hospitality properties exhibit increased expenses and earn lower net operating income (NOI) than non-certified buildings. ENERGY STAR certified properties demonstrate lower overall expenses than non-certified buildings with statistically neutral NOI effects. Using a custom sample of all green buildings and their competitive data set as of 2013 provided by Smith Travel Research (STR), the paper documents potential reasons for this result including increased operational expenses, potential confusion with certified and registered LEED projects in the data, and qualitative input. The qualitative input comes from a small sample survey of five industry professionals. The paper provides one of the only analyses on operating efficiencies with LEED and ENERGY STAR hospitality properties.

THE IMPACT OF PHYSICAL AND CHEMICAL WEATHERING ON IRON SLAG FROM STANDISH, NY

2019 ◽  
Author(s):  
Maria L. Leonard ◽  
◽  
Rachel M. Kelk ◽  
Dori J. Farthing
Keyword(s):  
Chemical Weathering ◽  
Iron Slag ◽  
Physical And Chemical ◽  
The Impact

Does Tax Increment Financing Pass the “But-for” Test in Missouri?

2019 ◽  
Vol 33 (3) ◽  
pp. 187-202
Author(s):  
Ahmed Rachid El-Khattabi ◽  
T. William Lester
Keyword(s):  
Economic Development ◽  
Kansas City ◽  
Time Series Data ◽  
Local Level ◽  
Conclusive Evidence ◽  
Series Data ◽  
Tax Increment Financing ◽  
Data Set ◽  
Development Indicators ◽  
The Impact

The use of tax increment financing (TIF) remains a popular, yet highly controversial, tool among policy makers in their efforts to promote economic development. This study conducts a comprehensive assessment of the effectiveness of Missouri’s TIF program, specifically in Kansas City and St. Louis, in creating economic opportunities. We build a time-series data set starting 1990 through 2012 of detailed employment levels, establishment counts, and sales at the census block-group level to run a set of difference-in-differences with matching estimates for the impact of TIF at the local level. Although we analyze the impact of TIF on a wide set of indicators and across various industry sectors, we find no conclusive evidence that the TIF program in either city has a causal impact on key economic development indicators.

Sign in / Sign up

Export Citation Format

Share Document