scholarly journals RIQUEZA ESPECÍFICA EM ÁREAS DE CAMPO NATIVO IMPACTADAS POR VISITAÇÃO TURÍSTICA E PASTEJO NO PARQUE NACIONAL DOS CAMPOS GERAIS, PR

FLORESTA ◽  
2011 ◽  
Vol 41 (2) ◽  
Author(s):  
Karine Dalazoana ◽  
Rosemeri Segecin Moro
Keyword(s):  
Species Diversity ◽  
National Park ◽  
Anthropogenic Factors ◽  
Species Number ◽  
Anthropogenic Pressure ◽  
Grassland Community ◽  
Campos De Altitude ◽  
Resistant Species ◽  
Native Grassland ◽  
Selection Of

O Parque Nacional dos Campos Gerais (PNCG) detém áreas de campos de altitude sob forte pressão antrópica, com a expansão das atividades agrícolas, pecuária, silvicultura e visitação turística desordenada. Devido ao impacto gerado, existe uma tendência à diminuição da riqueza específica, através da seletividade de espécies. Este trabalho analisa a resposta das comunidades campestres em termos de composição de espécies aos impactos de pastejo, roçada e pisoteio humano. Em quatro estações de coleta, foram determinados 107 táxons distribuídos em 23 famílias botânicas. As famílias com maior riqueza específica foram Asteraceae e Poaceae, ambas com 24 táxons, e Fabaceae, com 14 táxons. A riqueza específica variou de 27 a 75 espécies, com maior riqueza na estação não pastejada nem roçada, apenas visitada por turistas. O levantamento mostrou que, apesar da pressão antrópica, as áreas estudadas exibem considerável riqueza específica quando comparadas a outros trabalhos na região, mantendo ainda seu potencial biótico dinâmico. Floristicamente, os impactos gerados por gado ou por manejo com roçadeira se equivalem. Seis gêneros têm potencial para serem utilizados como bioindicadores de áreas conservadas: Croton, Galactia, Periandra, Cuphea, Pavonia e Commelina, mas há necessidade de ampliação das áreas estudadas para estabelecer mais claramente seu valor de bioindicação.Palavras-chave: Campo nativo; Campos Gerais; área impactada; pastejo; visitação turística. AbstractThe species diversity in native grassland areas that are under impact of tourism and grazing at Campos Gerais National Park, Parana, Brazil. Campos Gerais National Park (PNCG) has areas of grassland under high anthropogenic pressure, as expansion of agricultural activities, livestock, forestry and disorderly tourism. Due to these impacts, there is a tendency to decrease local biodiversity by selection of more resistant species. This paper focuses the grassland community answers to mowing, grazing and tourism. In four sampling sites it was determined 107 taxa belonging to 23 botanic families. The main families are Asteraceae (24 taxa), Poaceae (24 taxa) and Fabaceae (14 taxa). Species diversity varied from 27 to 75 species. In relation to species number, non-grazed areas presented greater diversity than other ones; it points to that touristic visitation may cause lower impact than grazing or mowing. In spite of the anthropogenic factors, the focused sites presented high specific diversity in relation to related areas. In relation to species diversity, grazing or mowing are equal. Six genera presented potentiality as bioindicators of preserved environments: Croton, Galactia, Periandra, Cuphea, Pavonia, and Commelina, although more sample areas are necessary to reliable results.Keywords: Grasslands; Campos Gerais; impacted area; grazing; touristic activities.

scholarly journals Changes of Taxonomic Diversity of Soils’ Mеasopopulation in the Range of Environmental Conditions of the Northern Macroslope of Khamar-Daban

2020 ◽  
Vol 34 ◽  
pp. 55-66
Author(s):  
E. P. Bessolitsyna ◽  
Keyword(s):  
Anthropogenic Impacts ◽  
Taxonomic Diversity ◽  
Main Trend ◽  
Anthropogenic Factors ◽  
Species Number ◽  
Soil Conditions ◽  
Anthropogenic Pressure ◽  
Ecological Analysis ◽  
High Rise ◽  
Landscape Ecological

Landscape-ecological analysis of taxonomic diversity and structure of soil invertebrates’ community in the geosystems of the Hamar-Daban Region was carried out on the main levels: local (biogeocenotic), topological (facies) and regional. The paper considers regularities of transformation of communities’ structure in landscape-zonal range under the influence of natural conditions: phytocenotic (peculiarities of vegetation), edaphical and climatic (hydrothermal regime of the soil) and anthropogenic factors. On the models groups: Сarabidae, Staphylinidae, Elateridae, Formicidae altitudinal changes of community' structure have been traced; in all landscape-high-rise complexes (in species composition and abundance of species) was revealed forest preference. The main trend of changes in taxonomic diversity of invertebrate’s communities is a decrease in the species number in the gradient of an increase of climate aridity, and strengthening of the hypothermal character and anthropogenic pressure. Peculiarities of structures invertebrate’s communities and their changes due to the climate change and anthropogenic impacts can serve as one of diagnostic criteria of soil conditions and can be used for estimation of landscapes’ transformation and monitoring.

scholarly journals Modelling of rare plant species diversity changes by anthropogenic factors in meadow steppes of the Southern Opillya

2017 ◽  
pp. 133-142
Author(s):  
Dmytrash-Vatseba I.
Keyword(s):  
Species Diversity ◽  
Rare Species ◽  
Habitat Degradation ◽  
Rare Plants ◽  
Anthropogenic Factors ◽  
Species Number ◽  
Rare Plant ◽  
Cumulative Impact ◽  
Plant Richness ◽  
Negative Factors

Nowadays, area decrease and pastoral digression enhance are determinative factors for the extinction of rare plants populations. Making their cumulative impact on rare fraction of meadow steppes, these negative factors govern 74.4 % of habitats richness in the Southern Opillya. Two models were built to demonstrate the process of rare species number reduction under stress of the negative factors. Model I (regression model) displays a graduate ten times reduction in rare plant diversity rate with increasing of the factors intensity. Model II was developed based on generalized dataset of rare species number in habitats. It reveals an abrupt reduction of rare plant richness at the very beginning of habitat degradation, also at the last stages of this process. A species composition of rare fraction of flora for meadow steppes at different degradation level is presented.

Selection of diet by sheep grazing semi-arid pastures on the Riverine Plain. 2. A cotton bush (Kochia aphylla) - grassland (Stipa variabilis-Danthonia caespitosa) community

1966 ◽  
Vol 6 (23) ◽  
pp. 468 ◽  
Author(s):  
JH Leigh ◽  
WE Mulham
Keyword(s):  
Sheep Grazing ◽  
Practical Application ◽  
Lolium Rigidum ◽  
Merino Sheep ◽  
Grassland Community ◽  
Resistant Species ◽  
Drought Resistant ◽  
Visual Assessments ◽  
Semi Arid ◽  
Selection Of

The diet selected by Merino sheep grazing a cotton bush (Kochia aphylla)-grassland community was determined by analysing extrusa from wethers fitted with oesophageal fistula. Visual assessments were combined with hand clipped samples to determine the amount of forage available. In winter and spring the major constituents of the diet were the grasses Danthonia caespitosa and Lolium rigidum Gaudich., and the herbs Hypochaeris spp. and Hedypnois cretica (L.) Willd. In summer the grasses Sporobolus caroli Mez and Chloris truncata R. Br. were selected. The various species of Chenopodiaceae were largely ignored. A practical application of this information is presented in which it is suggested that the more acceptable, but short-lived spring forage can be fully utilized and the relatively unacceptable, but drought resistant, species of Chenopodiaceae be conserved for use during stress periods.

scholarly journals A re-evaluation of the occurrence of freshwater molluscs in the Kruger National Park

Koedoe ◽  
1998 ◽  
Vol 41 (1) ◽  
Author(s):  
K.N. De Kock ◽  
C.T. Wolmarans
Keyword(s):  
Species Diversity ◽  
National Park ◽  
Kruger National Park ◽  
Intermediate Hosts ◽  
Freshwater Molluscs ◽  
Freshwater Mollusc ◽  
Mollusc Species ◽  
Trematode Parasites

Most of the previous records of the freshwater molluscs from the Kruger National Park date back prior to and up to 1966. On account of several droughts between 1966 and 1995 it was decided to do a survey of the freshwater mollusc population in 1995 to evaluate the effect of these droughts. The traditional mollusc intermediate hosts were also screened for trematode parasites to establish whether or not they were infected. No infected molluscs were found. Eight of the 19 species reported up to 1966 were not found during the 1995 survey. Three new mollusc species were collected in 1995. The consequences of the drought are clearly visible when the species diversity found in the dams in the 1995 survey, is compared to what was previously recorded.

First Data on Bryoindication Mapping of Small Towns of Ukraine

2021 ◽  
Vol 63 (3-4) ◽  
pp. 311-334
Author(s):  
Yu. V. Gapon ◽  
S. Y. Kondratyuk ◽  
S. V. Gapon
Keyword(s):  
Species Diversity ◽  
Community Composition ◽  
Small Towns ◽  
Medium Size ◽  
Anthropogenic Pressure ◽  
Left Bank ◽  
Natural Conditions

Results of bryoindication mapping based on calculation of an index of atmospheric purity (IAP) of towns of the Left Bank Ukraine, i.e. the smallest Romny (Sumy oblast) and Myrhorod (Poltava oblast) towns, small Pryluky (Chernihiv oblast) and Lubny (Poltava oblast) towns as well as medium size Poltava town (Poltava oblast), are provided. It is found that isotoxic bryoindication zones of moderately polluted air are predominate and often forming entire areas in the centre / industrial / densely built-up areas of Poltava, Lubny and Pryluky towns while isotoxic zones with slightly polluted or unpolluted air are predominant or more widely distributed in smaller towns Romny and Myrhorod. Correlation of data on species diversity, community composition of bryophytes as well as data of the IAP zoning of the territory of all towns mentioned as well as natural conditions of their territory and anthropogenic pressure is discussed.

scholarly journals Inland water microcrustacean assemblages in an altitudinal gradient in Aysen region (46° S, Patagonia Chile)

2014 ◽  
Vol 74 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Patricio De los Ríos-Escalante ◽  
Esteban Quinán ◽  
Patricio Acevedo
Keyword(s):  
National Park ◽  
Altitudinal Gradient ◽  
Null Model ◽  
Tierra Del Fuego ◽  
Species Number ◽  
Regional Studies ◽  
Inland Water ◽  
Chilean Patagonia ◽  
Water Ecosystems ◽  
Torres Del Paine

The Chilean Patagonia has numerous kinds of inland water ecosystems such as lakes, ponds, wetlands and rivers that have been poorly studied due to access difficulties. This study was carried out in Aysen region, in southern Chile, and it included different kinds of water bodies such as rivers, streams, ponds, lagoons and lakes distributed along an altitudinal gradient at 46° S. It was found a low species number, essentially cladocerans, copepods and amphipods. A null model was applied in order to determine the existence of regulator factors of species associations, and the results revealed that they are not random. The patterns would be influenced by geographical and limnological characteristics of the studied sites. Our results would agree with regional studies on habitat heterogeneity such as in Torres del Paine National Park and other zones in Tierra del Fuego island.

scholarly journals Bioecological and statistical risk assessment of toxic metals in sediments of a worldwide important wetland: Gala Lake National Park (Turkey)

2017 ◽  
Vol 43 (1) ◽  
pp. 34-47 ◽  
Author(s):  
Cem Tokatli
Keyword(s):  
Ecological Risk ◽  
National Park ◽  
Risk Index ◽  
Sediment Quality ◽  
Potential Ecological Risk ◽  
Irrigation Canal ◽  
Anthropogenic Pressure ◽  
Ecological Risk Index ◽  
Potential Ecological Risk Index ◽  
Biological Risk

Abstract Gala Lake National Park that has an international importance is one of the most important wetland ecosystems for Turkey. As same as many aquatic habitats, Gala Lake is under a significant anthropogenic pressure originated from agricultural activities conducted around the lake and from industrial discharges by means of Ergene River. The aim of this study was to evaluate the sediment quality of Gala Lake and Irrigation Canal by investigating some toxic element accumulations (As, B, Ni, Cr, Pb, Cd, Zn and Cu) from a statistical perspective. Pearson Correlation Index (PCI) and Factor Analysis (FA) were applied to detected data in order to determine the associated contaminants and effective factors on the system. Potential Ecological Risk Index (RI) and Biological Risk Index based sediment quality guidelines (mERM-Q) applied to detected data in order to assess the ecological and biological risks of heavy metals in the ecosystem. Also Geographic Information System (GIS) technology was used to make visual explanations by presenting distribution maps of investigated elements. According to the results of PCI, significant positive correlations were recorded among the investigated toxic elements at 0.01 significance level. According to the results of FA, two factors, which were named as “Agricultural Factor” and “Industrial Factor”, explained 86.6% of the total variance. According to the results of Potential Ecological Risk Index, cadmium was found to be the highest risk factor and according to results of Biological Risk Index, nickel and chromium were found to be the highest risk factors for Gala Lake and Irrigation Canal. As a result of the present study, it was also determined that heavy metal contents in sediments of Gala Lake National Park reached to critical levels and the system is intensively under effect of agricultural and industrial originated pollution.

Effect of Artificial Grassland Establishing on the Vegetation Restoration in the Degraded Ecosystem

2014 ◽  
Vol 955-959 ◽  
pp. 3474-3478
Author(s):  
Tie Jun Sun
Keyword(s):  
Species Diversity ◽  
Community Composition ◽  
Early Period ◽  
Vegetation Restoration ◽  
Bromus Inermis ◽  
Perennial Grasses ◽  
Species Number ◽  
Composition And Structure ◽  
Degraded Ecosystem ◽  
Annual Grasses

Experiment was executed to plant Bromus inermis artificially in the degraded ecosystem, and study effect of grass planting on vegetation restoration. The results indicated that natural vegetation restored rapidly in the degraded ecosystem in two years after grass planted. But species diversity changed little in the early period of vegetation restoration, while vegetation biomass, coverage and anti-interference improved quickly. In addition, species number and important value of perennial grasses increased while those of annual grasses decreased. Then community composition with annual plants mainly changed gradually into that with perennial plants mainly after Bromus inermis planted. However, overground biomass and coverage of restored vegetation and dominance of Bromus inermis planted decreased after vegetation cut once a year. And species diversity and important value of annual grasses increased. Thus it could be good for uniformity of species distribution and stability of community composition and structure to develop.

scholarly journals Use of the flooded forest by fish assemblages in lakes of the National Park of Anavilhanas (Amazonas, Brazil)

2012 ◽  
Vol 42 (4) ◽  
pp. 561-566 ◽  
Author(s):  
Janette Noveras ◽  
Kedma C. Yamamoto ◽  
Carlos E.C. Freitas
Keyword(s):  
Species Diversity ◽  
Correspondence Analysis ◽  
National Park ◽  
Fish Assemblages ◽  
Open Water ◽  
Flooded Forest ◽  
Rio Negro ◽  
Flooded Forests ◽  
Filter Feeders ◽  
Distribution Of Fish

We evaluated diversity and distribution of fish species in two habitats: flooded forest and open water of lakes of Rio Negro. Each of four lakes within the Anavilhanas Archipelago was sampled three times from 2009-2010. Species diversity generally was higher in flooded forests and at night, according to correspondence analysis. Predators were most active at night, but showed no preference between the flooded forest and open water habitats. Omnivores, filter feeders, and detritivores were most active during the day.

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