Temat: Diversity Index - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Impact of Jute Retting on Phytoplankton Diversity and Aquatic Health: Biomonitoring in a Tropical Oxbow Lake
Autorzy:: Ghosh, D.
Biswas, J. K.
Tematy:: biomonitoring
oxbow lake health
jute retting
phytoplankton
diversity index; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/123191.pdf Link otwiera się w nowym oknie
Opis:: Phytoplankton acts as a primary producer and biological filter of aquatic ecosystem. Jute retting during monsoon is a common anthropological activity in the rural Bengal. Quantitative seasonal bio-monitoring of phytoplankton community composition with relative abundance and its diversity indices was carried out in this study from April 2013 to March 2014 to assess water quality and the impact of jute retting on phytoplankton diversity of a tropical fresh water oxbow lake in Nadia district of India. We recorded a total of 34 genera of 5 distinct classes, Chlorophyceae (15), Bacillariophyceae (13), Cyanophyceae (4), Dinophyceae (1) and Euglenophyceae (1). Members of Chlorophyceae dominated throughout the year. Unlike Cyanophyceae, Bacillariophyceae was found to be significantly increased during monsoon when compared to the rest of the year. Average phytoplankton density was highest in post-monsoon (8760/L) followed by monsoon (4680/L) and pre-monsoon (3650/L). Owing to the dominance of class Chlorophyceae and Bacillariophyceae we found this lake to be oligotrophic to mesotrophic. Indices values of genera richness, Shannon-Wiener, evenness and Simpson’s diversity reached their lowest 14, 1.61, 0.61 and 0.68 in monsoon and highest 23, 2.42, 0.77 and 0.86 in post monsoon respectively. The lowest diversity values during monsoon clearly suggested that the selected lake has highest anthropogenic pollution due to jute retting which impacted significantly on phytoplankton diversity. Therefore, the lake is not conducive for fish growth especially during monsoon and we opine that there is a need to regulate jute retting process, intensity and its density in the lake during the monsoon to ensure enhanced biodiversity for sustainable management and conservation of aquatic environment of this Oxbow lake.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Correlation between physical and chemical parameters of water and biotic indices: The case study the White Drin River basin, Kosovo
Autorzy:: Zhushi Etemi, Ferdije
Çadraku, Hazir
Bytyçi, Arbnore
Kuçi, Tetlinda
Desku, Arbnore
Ymeri, Prespa
Bytyçi, Pajtim
Tematy:: biotic index
diversity index
macroinvertebrate assemblage
pollution
the White Drin River basin; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/292304.pdf Link otwiera się w nowym oknie
Opis:: The major impacts on aquatic ecosystems worldwide caused by land use lead to changes in their natural conditions and limitation of water use for various needs. This paper presents the results of the study of the physical and chemical parameters and macroinvertebrate assemblage in the White Drin River (or: the Drim River, Alb. the Drini i Bardhë River) basin, the largest in Kosovo. Macroinvertebrate sampled at 11 sites in the river resulted in 5946 collected benthic organisms, which in taxonomic terms belong to 12 orders and 51 families. Of the total number of organisms, 72.28% were Insects, 25.39% Amphipoda crustaceans and 2.33% were Annelide worms and Mollusk. The used biotic indices Biological Monitoring Working Party (BMWP), Ephemeroptera, Plecoptera, and Trichoptera (EPT), average score per taxon (ASPT) and Stroud Water Research Center (SWRC) classify water quality in excellent category in the sampling site S1 near the source of the White Drin River, whereas in other sampling sites, as a result of pollution, water quality varies on category II–IV. The Pearson's correlation analyses shown that the physical and chemical parameters affect the water quality and the composition of macroinvertebrates. Our results show that the parameters that adversely affect the BMWP, EPT and ASPT biotic indices as well as the Shannon–Wiener, Mergalef and Menhinik diversity indices are: pH, electrical conductivity (EC), total suspended solids (TSS), nitrates (NO₃^–) and chlorides (Cl^–). We can conclude that the anthropogenic impact on White Drin basin affects the physical, chemical and biological parameters of the water therefore these parameters should be constantly included in Biomonitoring and Management plans for water resources in Kosovo.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Haemoparasites of the pied flycatcher : inter-population variation in the prevalence and community composition
Autorzy:: Harnist, Iga
Podmokła, Edyta
Mazgajski, Tomasz D.
Dubiec, Anna
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 4.

Tytuł:: Environmental effects of using large rivers for irrigation in the Kazakhstan – Syr Darya case study
Autorzy:: Mustafayev, Zhumakhan
Mosiej, Józef
Abdyvalieva, Karlygas S.
Kozykeeva, Alija
Tematy:: diversity index
irrigation
soil degradation
Syr Darya River
environmental risk indicator; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/1844408.pdf Link otwiera się w nowym oknie
Opis:: The issues discussed in the paper concern the assessment of changes in quantitative and qualitative indicators of water resources in the climatic conditions of the southern part of Kazakhstan. For this purpose, many years of systematic field observations and other continuous data obtained from the functioning measurement and observation stations operating within the Aral-Syrdarya Basin Inspection were used. On the basis of the obtained data, indicators were determined that characterize the quantity and quality of water supplied to the soil in the irrigation process, as well as the quantity and quality of water flowing out of the drainage systems, together with an evaluation of the effectiveness of irrigation and drainage systems. Soil salinity was assessed in five irrigated massifs with a total area of 332.55 thous. ha. For the same irrigated massifs, the annual amounts of water taken for irrigation, the amount of outflowing water and the assessment of the mineralization level were determined. Based on the developed results of field observations characterizing the hydrological and environmental situation of the lower section of the Syr Darya River in 1960–2015, the negative reaction coefficients were calculated for the local population, soil and vegetation for five of the irrigated massifs of the Kyzylorda region. The ecological situation of the habitat of soil and plants in the lower reaches of the Syr Darya River in all irrigation areas deteriorates on a time scale, since as a result of the reclamation of agricultural lands, intensive secondary soil salinization occurs and the formation of infiltration runoff with high mineralization, contributing to the violation of the harmonization of the relationship between nature and man.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A statistical approach to estimates of geomorphological-morphotectonic diversity for evaluating the scientific value of geosites: a case study from the southeastern Lut desert, Iran
Autorzy:: Sadeghi-Farshbaf, Pouya
Khatib, Mohammad Mahdi
Rezaei, Naser
Tematy:: diversity index
geomorphosites
topography
statistical rating
indeks różnorodności
topografia
ocena statystyczna; Pokaż więcej
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Powiązania:: https://bibliotekanauki.pl/articles/94289.pdf Link otwiera się w nowym oknie
Opis:: The present study aims to investigate the diversity index (dv-index) of morphotectonic and geomorphological landforms as one of the scientific value indices for evaluation of the geotouristic potential of the southeastern Lut desert using topographic statistical analysis. Scientific index scoring in most models is based on descriptive assessment by geotourists and experts. Statistical analysis of the dv-index in the present study helps experts to base their scoring on scientific methods. The dv-index is controlled by several items. In the present study, we analyse two of these, including the classification of topographic continuity pattern (TCP) and topographic slope position correlation (TSPC). For this purpose, a network of section lines is used to analyse slope continuity. The TSPC analysis is performed by using two parameters of absolute value and slope position. Results for these two evaluated items indicate a score of 1.46 (out of 2) for the dv-index. Given a rating of 5, the score obtained for the two items is a high one. Therefore, an initial estimate of the dv-index indicates a significant scientific value of the study area.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Lobaria pulmonaria as an umbrella species for the protection of epiphytic lichen diversity in Polish Carpathians
Autorzy:: Czarnota, Paweł
Tuchowski, Michał
Szymczyk, Rafał
Piegdon, Amelia
Tematy:: nature protection
diversity index
lichen diversity
Lobaria pulmonaria
umbrella species
zonal conservation; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/61043395.pdf Link otwiera się w nowym oknie
Opis:: Lobaria pulmonaria has been subject to strict and zonal protection in Poland for almost 20 years, assuming the function of an umbrella species for the protection of natural biodiversity. Knowledge about this function, however, is limited, mainly due to a lack of relevant research. The current protection zone with a radius (R) of up to 50 m was significantly reduced in 2014 compared to the previous one from 2004 (R=100 m), mainly due to the needs of forest management. This legislative change became why it was worth making a scientific balance of potential gains and losses. Corticolous lichens growing at circular sites with a radius of 150 m around lungwort host-trees, divided into three zones R=50 m, R=51-100 m, R=101-150 m, were selected as the biological group for verification. Beech (Fagus sylvatica) and sycamore (Acer pseudoplatanus) trees with DBH ≥40 cm, randomly located along the target azimuths of 0°, 120°, and 240°, were selected for the study at 15 sites located in the Polish Carpathians (Gorce and Bieszczady Mts). The research hypothesis was that the size of the L. pulmonaria protection zone in the Polish Carpathians is important for the conservation of a greater diversity of corticolous lichens. Based on the list of species, we assessed the statistical significance of differences in diversity indices between the zones and between the Gorce and Bieszczady sites, which was justified by the result of the DCA analysis. Both the total number of species and old-growth forest, legally protected and endangered species in Poland (categories EN, CR) were analyzed. Generally, the current protection zone with a radius of 50 m protects approx. 70% of all epiphytic lichen diversity and the same share of other investigated groups, while increasing the protection zone to R=100 m saves almost 90% of species representing these groups of lichens.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 7.

Tytuł:: The influence of acid rain on soil Nematode communities
The influence of acid rain on soil nematode communities: a comparison of contaminated habitats in the belt of the Karkonosze and Izerskie Mountains (South-West Poland) with uncontaminated areas in other regions of Poland
Autorzy:: Wasilewska, Lucyna
Współwytwórcy:: Polska Akademia Nauk. Instytut Ekologii
Wydawca:: Oficyna Wydawnicza Instytutu Ekologii PAN
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41. Juda-Rezler K., Abert K. 1994 -Rozkład stężeń i strumień zanieczyszczeń powietrza w Karkonoszach na podstawie modelowych badań symulacyjnych [The distribution of concentrations and streams of air pollution in the Karkonosze Mountains on the basis of simulations] (In: Karkonoskie Badania ekologiczne, II Konferencja Dziekanów Leśny, 17-19 stycznia 1994 [Karkonosze ecological research, II Conference Dziekanów Leśny, January 17-19, 1994], Ed. Z. Fischer) - Oficyna Wydawnicza Inst. Ekol. PAN, 29-62.
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Opis:: Streszczenie w języku polskim
Taxonomic and trophic structure were described – along with indices of diversity and maturity – for nematode communities at six sites influenced by acid rain in the chain of the Karkonosze Mountains and at Hala Izerska (both in south-west Poland). The sites in question were spruce (Picea abies) forest with clear or else relatively limited signs of degradation, with the intensity of this phenomenon being determined in relation to the incidence of treefall, young spruce stands, and grass-herb communities. lntensified degradation was found to reduce the diversity and maturity of nematode communities and to increase the numerical representation of fungivorous species. Dry conditions intensified these changes. The nematode communities of the aforementioned mountainous areas contaminated by acid rain were then compared with those studied by author about 20 years previously in other parts of Poland and considered uncontaminated. Communities from the contaminated areas were not found to have lower total numbers of nematodes, but did differ in the higher representation of fungivores and obligate plant parasites as well as in the absence of predators. A shift in the direction of feeding on fungi was noted among species feeding on reducers. Aspects unique to these communities which were noted on the scale of trophic differentiation were the loss of characteristic K-strategists (specially predators), and also loss of bacterivorous r-strategists in favour of more K-strategic bacterivores.
Bibliographical references (pages 104-110)
Strony 73-110 : ilustracje ; 24 cm
Pages 73-110 : illustrations ; 24 cm
Abstract in Polish
Bibliografia na stronach 104-110
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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Tytuł:: Density Effect of Mangrove Vegetation on Gastropods on Pandansari Mangrove Ecotourism Forest, Kaliwlingi Village, Brebes Central Java
Autorzy:: Nurfitriani, Siska
Lili, Walim
Hamdani, Herman
Sahidin, Asep
Tematy:: Brebes
Clavatulidae
Diversity Index
Ellobiidae
Gastropods
Mangrove Density
Mangroves
Naticidae
Nerithidae
Potamididae
Thiaridae
Uniformity Index; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/1062746.pdf Link otwiera się w nowym oknie
Opis:: This research was conducted on November 2018 - January 2019. The method used was the survey method by making direct observations on the stations that have been determined. The results of the research include two types of mangroves found, they are Rhizophora stylosa and Aviciena marina. The highest mangrove density was found at station 1, as many as 2302 ind / ha which dominated by R. stylosa. Gastropods found were Casidulla aurisfelis, Cerithidea sp., C. cingulate, C. alata, C. obtusa, Polinices sp., Puperita sp., Tarebia sp., Telescopium telescopium, and Turricula flammea. The Diversity Index obtained is 0.998 - 2.547, indicating moderate diversity. The uniformity index obtained is 0.10 - 0.27, indicating that there was a dominant community. While the relation between mangrove vegetation density and gastropods was 0.95, this shows that there is a very strong relation between the density of mangroves and gastropods.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Changes of species composition of the Poa pratensis-Festuca rubra plant communities in drainage peatland
Zmiany w składzie gatunkowym zbiorowiska Poa pratensis-Festuca rubra na odwodnionym torfowisku
Autorzy:: Urban, D.
Grzywna, A.
Tematy:: diversity index
relevés
river valley
species richness
bioróżnorodność
bogactwo gatunkowe
dolina rzeczna
zdjęcie fitosocjologiczne; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/292330.pdf Link otwiera się w nowym oknie
Opis:: The objective of this study was to examine the vegetation cover and describe the floristic diversity of selected plant communities of extensive and abandoned grasslands within the Forest of Parczew PLB060006 – a Natura 2000 protected area. Floristic surveys were conducted in the meadows in years 2001 and 2013 under the conditions of natural succession of the communities Poa pratensis-Festuca rubra. The area is situated in the northern part of the Lublin Voivodeship, in the physiographic mesoregion the Łęczna-Włodawa Lakeland. Those communities were characterized by average species richness and floristic diversity index values. The cover index decreased considerably in the case of 8 species, and increased for 12 species. A large increase in the cover index of Holcus lanatus, Deschampsia caespitosa, Galium mollugo, Anthriscus sylvestris and Polemonium caeruleae is particularly noteworthy. In 2001, 39 species of plants were recorded in all relevés, compared to 41 species recorded in 2013. Over 12 years, 11 species disappeared, but 13 new ones emerged. For the time being, the average species richness N increased from 12 to 16 per relevé. The biodiversity index H' increased from 2.8 to 3.6.
W artykule przedstawiono wyniki badań fitosocjologicznych na obiekcie Ochoża prowadzonych w 2001 i 2013 r. Z analizy danych wynika, że gatunkami występującymi na wszystkich badanych stanowiskach były głównie Poa pratensis i Festuca rubra oraz Urtica dioica. W 2013 r. na wszystkich badanych stanowiskach, oprócz gatunków omówionych wyżej, występowały także Rumex acetosa, Galium mollugo, Veronica chamaedrys i Cardaminopsis arenosa. Na podstawie analizy wyników badań stwierdzono, że w przypadku 15 gatunków klasa stałości w 2013 r. w porównaniu ze stanem z 2001 r. zwiększyła się, a w przypadku pozostałych się nie zmieniła. Odnotowano także zmiany współczynnika pokrycia. Uległ on znacznemu zmniejszeniu w przypadku 8 gatunków, a zwiększył się w przypadku 12 gatunków. Na szczególną uwagę zasługuje duże zwiększenie wartości współczynnika pokrycia Holcus lanatus, Deschampsia caespitosa, Galium mollugo, Anthriscus sylvestris oraz Polemonium caeruleae (w Polsce gatunek objęty ochroną prawną). W 2001 r. we wszystkich stanowiskach odnotowano 39 gatunków roślin, zaś w 2013 r. odnotowano 41 gatunków. Przez 12 lat zanikło 11 gatunków, ale pojawiło się 13 nowych. Przez 12 lat średnia liczba gatunków N zwiększyła się z 12 do 16. Zwiększył się także wskaźnik bioróżnorodności H’ z 2,8 do 3,6.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: The study of the transformation of segetal flora richness and diversity in selected habitats of southern Poland over a 20-year interval
Badania nad przeobrażeniami bogactwa i różnorodności flory segetalnej w wybranych siedliskach Polski południowej w okresie ponad 20 lat
Autorzy:: Dąbkowska, Teresa
Grabowska-Orządała, Monika
Łabza, Teofil
Tematy:: segetal weeds
diversity index
dominance index
weed community similarity
mountain habitats
lowland habitats
cereal crops
southern Poland; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/1590601.pdf Link otwiera się w nowym oknie
Opis:: The aim of study was to evaluate diversity of segetal flora and its transformations over a more than 20-year period in 19 field habitats representative for cereal crops of southern Poland. The research hypothesis assumed that: (i) the diversity of habitat conditions determines the abundance of arable land flora, (ii) it also affects farming intensity which is the main cause of the decline in the biodiversity of agrocoenoses. Based on 415 phytosociological relevés (sampled using the Braun-Blanquet method), weed species richness (Sr), phytosociological constancy of species (S), cover index (D), Shannon’s diversity index (H) and Simpson’s dominance index (C) were determined. Measurements were done for each habitat during two research periods. The results were subjected to ANOVA analysis. To assess the similarities of the studied habitats’ weed flora in each period and their changes over time, Ward’s hierarchical cluster analysis was used. The distance matrix was calculated from Jaccard’s similarity indices. The results are presented in the form of hierarchical trees. The study showed that species richness of the weed communities and their diversity were strongly determined by habitat conditions. Preservation of the value of the diversity index and even its increase (especially in a considerable part of mountain habitats) showed that extensive methods of reducing weed infestation had remained at a similar level of efficacy during the 20-year interval. Hierarchical cluster analysis showed differences between the first and second study period in the weed communities for habitats of lowland soil complexes. The exception were the habitats with the greatest potential for crop cultivation, located on chernozems and rendzinas. In the mountain habitats, there were no significant changes in the segetal flora during the study interval. An increase in weed flora abundance indicates a lack of threats to the diversity of agrophytocoenoses in this part of Poland.
Celem badań była ocena zróżnicowania flory segetalnej upraw zbóż i jej przeobrażeń w okresie ponad 20 lat, w 19 siedliskach reprezentatywnych dla południowej Polski. Hipoteza badawcza zakładała, że: (i) zróżnicowanie siedliskowe określa bogactwo flory polnej, (ii) wpływa ponadto na intensywność gospodarowania, która jest główną przyczyną zmniejszania bioróżnorodności agrozenoz. W oparciu o 415 zdjęć fitosocjologicznych wykonanych metodą Braun-Blanquet’a określono bogactwo gatunkowe chwastów (Sr), współczynniki pokrycia powierzchni przez chwasty (D) oraz wskaźniki: różnorodności Shannon’a (H) i dominacji Simpson’a (C). Ocenę przeprowadzono dla każdego z siedlisk w dwóch okresach badań. Wyniki poddano analizie statystycznej w programie ANOVA. W celu zbadania podobieństwa florystycznego badanych siedlisk przeprowadzono hierarchiczną analizę skupień metodą Ward’a, w której jako miarę odległości wykorzystano współczynniki podobieństwa Jaccard’a, a rezultaty zaprezentowano w postaci dendrogramów. Badania wykazały, że bogactwo gatunkowe zbiorowisk chwastów i ich zróżnicowanie w czasie było silnie zdeterminowane warunkami siedliskowymi. Zachowanie wartości wskaźników różnorodności, a nawet ich zwiększenie (zwłaszcza w znaczącej części siedlisk górskich) potwierdziło, że ekstensywne metody ograniczania zachwaszczenia pozostały na podobnym poziomie efektywności w ciągu okresu ponad 20 lat. Hierarchiczna analiza skupień wykazała zróżnicowanie pomiędzy pierwszym i drugim okresem badań w przypadku zbiorowisk chwastów siedlisk nizinnych. Wyjątkiem były siedliska o największej przydatności dla uprawy roślin, zlokalizowane na czarnoziemach i rędzinach. Na siedliskach górskich nie stwierdzono znaczących zmian w obrębie flory polnej w ciągu okresu dzielącego badania. Wzrost bogactwa florystycznego świadczy o braku zagrożenia dla różnorodności agrofitocenoz w tej części kraju.
Dostawca treści:: Biblioteka Nauki

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