Method of quantitative assessment of the regularities of natural restoration of biota in zones of technogenic disturbance by extractive enterprises

The paper presents the results of field studies of tendencies in plant communities self-regeneration processes in the zone of their technogenic disturbance and on the surfaces of rock spoil heaps. It has been established that in the former case the key factor determining the nature of development of self-regeneration processes is the correspondence of the width of the transitional community to the length of transfer of seeds of primary plant community edificatory and assectator species. In the latter case, the key self-regeneration succession sere passes the bifurcation point at a very early stage of its development.

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Does the edge effect influence plant community structure in a tropical dry forest?

Revista Árvore ◽

10.1590/s0100-67622013000200012 ◽

2013 ◽

Vol 37 (2) ◽

pp. 311-320 ◽

Cited By ~ 15

Author(s):

Diogo Gallo Oliveira ◽

Ana Paula do Nascimento Prata ◽

Leandro Sousa Souto ◽

Robério Anastácio Ferreira

Keyword(s):

Plant Community ◽

Plant Communities ◽

Edge Effects ◽

Woody Plants ◽

Tropical Dry Forest ◽

Dry Forest ◽

Semiarid Environments ◽

Key Factor ◽

Set Up ◽

Edge Influence

Edge effects are considered a key factor in regulating the structure of plant communities in different ecosystems. However, regardless to few studies, edge influence does not seem to be decisive in semiarid regions such as the Brazilian tropical dry forest known as Caatinga but this issue remains inconclusive. The present study tests the null hypothesis that the plant community of shrubs and trees does not change in its structure due to edge effects. Twenty-four plots (20 x 20 m) were set up in a fragment of Caatinga, in which 12 plots were in the forest edges and 12 plots were inside the fragment. Tree richness, abundance and species composition did not differ between edge and interior plots. The results of this study are in agreement with the pattern previously found for semiarid environments and contrasts with previous results obtained in different environments such as Rainforests, Savanna and Forest of Araucaria, which indicate abrupt differences between the border and interior of the plant communities in these ecosystems, and suggest that the community of woody plants of the Caatinga is not ecologically affected by the presence of edges.

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Temporal dynamics of mycorrhizal fungal communities and co-associations with grassland plant communities following experimental manipulation of rainfall

10.32942/osf.io/t82ug ◽

2019 ◽

Cited By ~ 1

Author(s):

Coline Deveautour ◽

Sally Power ◽

Kirk Barnett ◽

Raul Ochoa-Hueso ◽

Suzanne Donn ◽

...

Keyword(s):

Community Composition ◽

Plant Community ◽

Plant Communities ◽

Fungal Community ◽

Mycorrhizal Fungi ◽

Temporal Dynamics ◽

Arbuscular Mycorrhizal ◽

Fungal Communities ◽

Plant Responses ◽

Rainfall Regimes

Climate models project overall a reduction in rainfall amounts and shifts in the timing of rainfall events in mid-latitudes and sub-tropical dry regions, which threatens the productivity and diversity of grasslands. Arbuscular mycorrhizal fungi may help plants to cope with expected changes but may also be impacted by changing rainfall, either via the direct effects of low soil moisture on survival and function or indirectly via changes in the plant community. In an Australian mesic grassland (former pasture) system, we characterised plant and arbuscular mycorrhizal (AM) fungal communities every six months for nearly four years to two altered rainfall regimes: i) ambient, ii) rainfall reduced by 50% relative to ambient over the entire year and iii) total summer rainfall exclusion. Using Illumina sequencing, we assessed the response of AM fungal communities sampled from contrasting rainfall treatments and evaluated whether variation in AM fungal communities was associated with variation in plant community richness and composition. We found that rainfall reduction influenced the fungal communities, with the nature of the response depending on the type of manipulation, but that consistent results were only observed after more than two years of rainfall manipulation. We observed significant co-associations between plant and AM fungal communities on multiple dates. Predictive co-correspondence analyses indicated more support for the hypothesis that fungal community composition influenced plant community composition than vice versa. However, we found no evidence that altered rainfall regimes were leading to distinct co-associations between plants and AM fungi. Overall, our results provide evidence that grassland plant communities are intricately tied to variation in AM fungal communities. However, in this system, plant responses to climate change may not be directly related to impacts of altered rainfall regimes on AM fungal communities. Our study shows that AM fungal communities respond to changes in rainfall but that this effect was not immediate. The AM fungal community may influence the composition of the plant community. However, our results suggest that plant responses to altered rainfall regimes at our site may not be resulting via changes in the AM fungal communities.

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Classification of woody-shrub vegetation of the forest-steppe complex of Privolzhskaya Upland

Vegetation of Russia ◽

10.31111/vegrus/2009.15.27 ◽

2009 ◽

pp. 27-53

Author(s):

A. Yu. Kudryavtsev

Keyword(s):

Plant Community ◽

Plant Communities ◽

Dominant Species ◽

Large Scale ◽

Nature Reserve ◽

Vegetation Mapping ◽

Vegetation Classification ◽

Forest Steppe ◽

Mapping Data

Diversity of plant communities in the nature reserve “Privolzhskaya Forest-Steppe”, Ostrovtsovsky area, is analyzed on the basis of the large-scale vegetation mapping data from 2000. The plant community classification based on the Russian ecologic-phytocoenotic approach is carried out. 12 plant formations and 21 associations are distinguished according to dominant species and a combination of ecologic-phytocoenotic groups of species. A list of vegetation classification units as well as the characteristics of theshrub and woody communities are given in this paper.

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Responses and Indicators of Composition, Diversity, and Productivity of Plant Communities at Different Levels of Disturbance in a Wetland Ecosystem

Diversity ◽

10.3390/d13060252 ◽

2021 ◽

Vol 13 (6) ◽

pp. 252

Author(s):

Tingting Duan ◽

Jing Zhang ◽

Zhengjun Wang

Keyword(s):

Plant Community ◽

Plant Communities ◽

Leisure Activity ◽

Local Environment ◽

Diversity Indices ◽

Soil Parameters ◽

Grazing Tolerance ◽

Organic Matter Concentration ◽

Drought Tolerant ◽

Different Levels

Grassland tourism is a very popular leisure activity in many parts of the world. However, the presence of people in these areas causes disturbance to the local environment and grassland resources. This study analyzes the composition, diversity, and productivity under different levels of disturbance of the plant communities in the Kangxi Grassland Tourist Area and the Yeyahu Wetland Nature Reserve of Beijing, China. It aims to identify indicators of plant communities and their responses to different levels of disturbance. Our analysis shows that the plant community density and coverage have a certain compensatory increase under disturbed conditions. With the increase in disturbances, more drought-tolerant species have appeared (increased by 5.7%), some of which have become the grazing-tolerance indicator species in the trampled grazed area (TGA). For plant community productivity, biomass and height are good indicators for distinguishing different disturbances (p < 0.05). In addition, several diversity indices reveal the change of plant communities from different perspectives (three of the four indices were significant at the p < 0.05 level). For soil parameters, soil water content and organic matter concentration help to indicate different disturbance levels (the former has a 64% change). Moreover, the standard deviation of the plant community and soil parameters is also a good indicator of their spatial variability and disturbance levels, especially for the TGA. Our analysis confirms that the indicators of productivity, diversity, and soil parameters can indicate the disturbance level in each subarea from different perspectives. However, under disturbed conditions, a comprehensive analysis of these indicators is needed before we can accurately understand the state of health of the plant community.

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Shifts in soil and plant functional diversity along an altitudinal gradient in the French Alps

BMC Research Notes ◽

10.1186/s13104-021-05468-0 ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Alexia Stokes ◽

Guillermo Angeles ◽

Fabien Anthelme ◽

Eduardo Aranda-Delgado ◽

Isabelle Barois ◽

...

Keyword(s):

Plant Community ◽

Functional Diversity ◽

Plant Communities ◽

Species Abundance ◽

Chemical Properties ◽

Water Infiltration ◽

Temperate Climate ◽

Biophysical Properties ◽

Tropical Zone ◽

Soil Microbial

Abstract Objectives Altitude integrates changes in environmental conditions that determine shifts in vegetation, including temperature, precipitation, solar radiation and edaphogenetic processes. In turn, vegetation alters soil biophysical properties through litter input, root growth, microbial and macrofaunal interactions. The belowground traits of plant communities modify soil processes in different ways, but it is not known how root traits influence soil biota at the community level. We collected data to investigate how elevation affects belowground community traits and soil microbial and faunal communities. This dataset comprises data from a temperate climate in France and a twin study was performed in a tropical zone in Mexico. Data description The paper describes soil physical and chemical properties, climatic variables, plant community composition and species abundance, plant community traits, soil microbial functional diversity and macrofaunal abundance and diversity. Data are provided for six elevations (1400–2400 m) ranging from montane forest to alpine prairie. We focused on soil biophysical properties beneath three dominant plant species that structure local vegetation. These data are useful for understanding how shifts in vegetation communities affect belowground processes, such as water infiltration, soil aggregation and carbon storage. Data will also help researchers understand how plant communities adjust to a changing climate/environment.

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Study on Construction of Close-to-Nature Man-Made Plant Landscape Based on Natural Plant Communities: the Case of West Lake Scenic Area in Hangzhou

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.468-471.2764 ◽

2012 ◽

Vol 468-471 ◽

pp. 2764-2770

Author(s):

Shan Lu ◽

Bo Chen ◽

Shao Qing Hu ◽

Jing Jing Zhang ◽

Jun Hao Jiang ◽

...

Keyword(s):

Community Structure ◽

Plant Community ◽

Plant Communities ◽

Vegetation Composition ◽

Natural Community ◽

Community Based ◽

Natural Plant ◽

West Lake ◽

Construction Methods ◽

Landscape Plant

Urban close-to-nature plant community is a sustainable design and construction philosophy of landscape greenbelt planning. However, there is no explicit guide for constructing close-to-nature plant community Based on the analysis of community structure and characteristics of 10 typical natural plant communities in the West Lake Scenic Area in Hangzhou and summary of the features of natural community, as well as the analysis of plant landscape of Hangzhou Huagangguanyu Park to prove that the close-to-nature man-made plant community and natural plant community are interrelated in respect of vegetation composition and community structure, this paper puts forward to the essential construction methods of the close-to-nature landscape community, providing theoretical basis for research and construction of urban close-to-nature landscape plant community in China.

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A Diagnosis of Urban Poor Housing in Vietnam

Open House International ◽

10.1108/ohi-02-2017-b0014 ◽

2017 ◽

Vol 42 (2) ◽

pp. 97-105

Author(s):

Iftekhar Ahmed

Keyword(s):

Affordable Housing ◽

Urban Poor ◽

Field Studies ◽

Economic Reforms ◽

Cultural Dimensions ◽

Ho Chi Minh City ◽

Housing Sector ◽

Housing Supply ◽

Extensive Field ◽

Key Factor

This paper presents concepts important for understanding urban poor housing in Vietnam, with a focus on key environmental, socio-economic, and cultural dimensions that bear on the housing sector. The paper draws on extensive field studies and presents a diagnosis of the context of and prospects for housing of the urban poor in Vietnam's two main cities: Hanoi and Ho Chi Minh City. While the literature on this theme is scanty, it points to the market-orientated economic reforms initiated in the 1980s as a key factor in creating imbalance in the housing supply. Recognising the current challenges in balancing affordability and sustainability, the study explores Vietnam's lack of adequate and affordable housing and the problems faced by the urban poor in accessing adequate housing.

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Phytosociological surveys: tools for weed science?

Planta Daninha ◽

10.1590/s0100-83582013000200025 ◽

2013 ◽

Vol 31 (2) ◽

pp. 469-482 ◽

Cited By ~ 17

Author(s):

G. Concenço ◽

M. Tomazi ◽

I.V.T. Correia ◽

S.A. Santos ◽

L. Galon

Keyword(s):

Cluster Analysis ◽

Plant Species ◽

Plant Community ◽

Plant Communities ◽

Distinct Group ◽

Weed Science ◽

Comprehensive Overview ◽

Ecological Evaluation ◽

Natural Plant ◽

Ecological Basis

In simple terms, a phytosociological survey is a group of ecological evaluation methods whose aim is to provide a comprehensive overview of both the composition and distribution of plant species in a given plant community. To understand the applicability of phytosociological surveys for weed science, as well as their validity, their ecological basis should be understood and the most suitable ones need to be chosen, because cultivated fields present a relatively distinct group of selecting factors when compared to natural plant communities. For weed science, the following sequence of steps is proposed as the most suitable: (1) overall infestation; (2) phytosociological tables/graphs; (3) intra-characterization by diversity; (4) inter-characterization and grouping by cluster analysis. A summary of methods is established in order to assist Weed Science researchers through their steps into the realm of phytosociology.

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Treatment with Interferon plus Ribavirin in anti-HIV Negative Patients with Congenital Coagulation Disorders and Chronic Hepatitis C

Thrombosis and Haemostasis ◽

10.1055/s-0037-1613924 ◽

2000 ◽

Vol 83 (06) ◽

pp. 807-810 ◽

Cited By ~ 26

Author(s):

Silvia Sauleda ◽

Carmen Altisent ◽

Lluís Puig ◽

Rafael Esteban ◽

Jaume Guardia ◽

...

Keyword(s):

Chronic Hepatitis ◽

Viral Load ◽

Hepatitis C ◽

Chronic Hepatitis C ◽

Quantitative Assessment ◽

Early Stage ◽

Hcv Rna ◽

Congenital Coagulation Disorders ◽

Anti Hiv ◽

Hiv Negative

SummaryHepatitis C virus (HCV) infected hemophiliacs respond at low rate to interferon (IFN) monotherapy.To assess efficacy of IFN and RBV in HIV negative hemophiliacs with chronic hepatitis C and identify early predictive factors of response.Twenty naive patients were treated with interferon and RBV for twelve months. Response was assessed by both serial ALT and HCV RNA levels.Normalization of ALT with clearance of HCV RNA occurred in seven (35%) patients. Age and age at infection were the only features associated with a higher likelihood of response. In all responders the viral load had decreased by at least one log within two months of starting treatment.Combination of interferon and ribavirin is well tolerated by hemophiliacs who achieve similar sustained response rates to non-hemophiliacs. Quantitative assessment of viral load at two months of treatment is a useful method to identify non-responders at an early stage.

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Fruit yield of european cranberry (Oxycoccus palustris Pers.) in different plant communities of peatlands (northern Wielkopolska, Poland)

Acta Agrobotanica ◽

10.5586/aa.2009.012 ◽

2012 ◽

Vol 62 (1) ◽

pp. 97-105 ◽

Cited By ~ 1

Author(s):

Artur Adamczak ◽

Maciej Gąbka ◽

Waldemar Buchwald

Keyword(s):

Plant Community ◽

Plant Communities ◽

Leaf Size ◽

Fruit Weight ◽

Fruit Yield ◽

Habitat Conditions ◽

Fruit Number ◽

Oxycoccus Palustris

The aim of this study was to determine fruit yield of Oxycoccus palustris under the climatic and habitat conditions of northern Wielkopolska (the Greater Poland region), depending on the type of occupied plant community. Total fruit number and fruit weight as well as average cranberry leaf size were determined on 33 plots with an area of 1 m2, located on 7 peatlands. On the study areas, European cranberry produced crops from 9.2 up to 242.0 g &#56256;&#56457;&#56256;&#56323; m-2, which gives 92-2420 kg &#56256;&#56457;&#56256;&#56323;ha-1. It has been demonstrated that on the peatlands of northern Wielkopolska O. palustris reaches its generative and vegetative optimum in the communities of the class Scheuchzerio- Caricetea fuscae, in particular in the community Sphagno recurvi-Eriophoretum angustifolii.

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