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1
Content available Diversity of frugivorous and omnivorous birds in different stages of ecological succession in Amazon Rainforest fragments
100%
Dario F. R.
World News of Natural Sciences
|
2017
|
tom 15
37-48
EN
The diversity of birds is directly correlated with the structure of the forest. Any interfering with the vegetation produces direct effects on the avifauna through the increase, decrease, or alternation of two key attributes: food and shelter. Thus, the composition of life in the forest is altered as changes occur in vegetation that directly interferes with the population structure of the avifauna, be those changes natural or anthropic. This study was realized in fragments of the Amazon Rainforest, and the main objective was to analyze the behavior of frugivorous and omnivorous birds in three different stages of ecological succession. In forest environments where a vertical stratification of resources occurs, these species are distributed occupying a in a high diversity of trophic niches. The diversity and density of the frugivorous and omnivorous birds in the forest fragments in medium and advanced stage of ecological succession could be directly correlated not only with the structure of the forest, but also to the fact that these birds feed almost exclusively on abundant and easy to find food sources - shrub and tree fruit of certain vegetable species that are naturally abundant in the rainforest understory layer.
2
Content available Vertical stratification of birds in Dense Ombrophilus Forest remmant in Brazil
100%
Dario F. R.
World News of Natural Sciences
|
2022
|
tom 42
56-75
EN
The composition of life in the forest is altered as changes occur in vegetation that directly interferes with the population structure of the avifauna. The integrity and complexity of a forest are the factors that influence the composition, abundance, and probably the functions of the assembly of different bird species. In that way, in forest environments, where a vertical stratification of resources occurs, these species are distributed occupying a high diversity of trophic niches. This study realized in forest fragments of Atlantic Forest in a metropolitan area of São Paulo, Brazil, was to analyze the bird's distribution in trophic guilds, according to vertical stratification to different ecological successional stages of vegetation. The forest fragment in an advanced stage of secondary regeneration showed the highest number of bird species and was better distributed in trophic guilds and in the vertical structure of the forest, which indicates a better quality status in comparison to the other forest fragments in an initial and medium stage of ecological succession.
3
Content available remote Short-term study on the early succession stages of fouling communities in the coastal zone of Puck Bay (southern Baltic Sea)
100%
Dziubińska A. , Szaniawska A.
Oceanological and Hydrobiological Studies
|
2010
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tom Vol. 39, No.4
3-16
EN
The aim of this study was to distinguish the early succession stages of the fouling community in Puck Bay at depths of 3-7 m, to evaluate its biodiversity and to find the point at which the biodiversity of the assemblages achieved similarity. The depth at the study site was 8 m. The investigation lasted from 24 July to 22 September 2008 (61 days) when the colonisation and succession process of fouling communities is most intensive. During this period five sets of samples were collected. The investigations were focused on sessile organisms that established themselves on 105 PVC settlement panels (15 × 15 cm, 0.2 cm thick), 21 panels being deployed at each of five depths - 3, 4, 5, 6 and 7 m. A total of twelve sessile taxa and eight mobile (accompanying) taxa were identified over the course of the experiment. The panels became overgrown with fouling organisms in a characteristic manner - a layer of barnacles became covered with a layer of mussels. This type of community development created a double-layered structure (multi-strata growth). Assemblages reached a thickness of 2 cm as a result of the stratified fouling process. The species diversity was highest on 12 August (the first sampling day) at 7 m depth. Biodiversity differences during the study indicated that communities from all examined depths in Puck Bay became similar after a two-month colonisation period. By the end of the study Balanus improvisus and Mytilus trossulus were dominant in the communities at all depths.
4
Succession of periphyton developing on artificial substrate immersed in polysaprobic wastewater reservoir
88%
Szlauer-Lukaszewska A.
|
|
nr 5
753-762
EN
The succession of periphyton developing on artificial substrate immersed in a polysaprobic wastewater reservoir was studied during a two-year period. Three stages in the periphyton development: initial, inter­mediate and mature, were observed. The initial stage was characterized by domination of euglenophytes; Carchesium polypinum was dominant during the intermediate stage, while diatoms and chrysophyceans dominated the mature stage. However, the most characteristic component of periphyton consisted of de­tritus that contributed more than 50% (by volume). The periphyton development dynamics in the second year of the experiment, when that formation was already firmly established on the polyethylene sheets, was quantitatively similar to the process of periphyton development in the first year of substrate exposure.
5
Content available The Influence of Geotextiles Stabilizing the Soil on Vegetation of Post-Excavation Slopes and Drainage Ditches
88%
Kobiela-Mendrek K. , Salachna A. , Chmura D. , Klama H. , Broda J.
Journal of Ecological Engineering
|
2019
|
tom Vol. 20, nr 1
125--131
EN
The paper presents preliminary results of the studies concerning influence of geotextiles stabilizing the soil on vegetation of post-excavation slopes and drainage ditches. Analyzed anthropogenic habitats are situated in Międzyrzecze and Nieboczowy (Silesian Province, Southhern Poland). They have been previously subjected to reclamation treatment, consisting in installation of wool and synthetic geotextiles in the ground. The studies on plant community were conducted according to commonly applied Braun-Blanquet approach. Recorded phytocenosis were classified into Molinio-Arrhenatheretea R. Tx.1937 and Stellarietea mediae R. Tx., Lohm. et Prsg.1950 class. For comparison of plant patches growing on two variants of geotextiles Hierarchical Cluster Analysis was used. Moreover, the number of species (S), Shannon-Wiener index (H), evenness index (J) and average heights of herbal layer were calculated. It has been shown, that the type of geotextiles has a slight influence on the variability of investigated plant patches. However, relatively high differences in total coverage and mean height of herbal layer between plots protected and unprotected were observed. It shows that the geotextiles support the process of natural ecological succession on habitats with high inclination, mainly through water retention and reduction of erosion.
6
Content available Genetic insights into ecological succession from oak- (Quercus robur L.) to beech-(Fagus sylvatica L.) dominated forest stands
75%
Sandurska E. , Ulaszewski B. , Burczyk J.
|
|
nr 1
7
Content available Physico-chemical groundwater conditions at Salix lapponum stands in Eastern Poland
75%
Serafin A. , Pogorzelec M. , Banach B. , Szczurowska A. , Mielniczuk J.
Dendrobiology
|
2015
|
tom 73
EN
A subarctic-boreal relict species, Salix lapponum, found within the area of the Łęczna-Włodawa Lakeland (Eastern Poland), is particularly threatened with extinction due to the southern limit of its range and the specific conditions of its occurrence. This conclusion is evidenced by a systematic reduction in the number of its locations, which is accompanied by a decrease in the numbers of individuals making up its populations. The aim of the present study was to determine habitat conditions of the occurrence of Salix lapponum populations on the basis of an analysis of physico-chemical factors of groundwater at the sites associated with various stages of succession taking place in small peatland water bodies. The results of this study confirm the trend that the stands and population numbers of this species are decreasing with the intensification of ecological succession and the degree of its progress and at the same time show that this species exhibits a wide amplitude of many of the investigated factors. Among the groundwater parameters under investigation, the low level of total nitrogen, phosphorus fraction and DOC as well as the high level of Ca, pH and electrolytic conductivity can be considered to be a set of conditions that promote the maintenance of Salix lapponum populations. On the other hand, in the case of nitrates, nitrites, sulphates as well as the Na, K and Mg ions, the Kruskal-Wallis statistical test showed that the distribution of their values was invariant in relation to the studied habitats, which is probably evidence that they do not determine the development or extinction of the investigated populations in these habitats.
8
Vegetation within the exploited part of "Storkowo" Mine
63%
Mlynkowiak E. , Kutyna I. , Bubka M.
Zeszyty Naukowe. Acta Biologica. Uniwersytet Szczeciński
|
2010
|
tom 17
9
Submerged objects - a nice place to live and develop. Succession of fouling communities in the Gulf of Gdansk, Southern Baltic
63%
Dziubinska A. , Janas U.
Oceanological and Hydrobiological Studies
|
2007
|
tom 36
|
nr 4
65-78
10
Content available Genetic insights into ecological succession from oak- (Quercus robur L.) to beech- (Fagus sylvatica L.) dominated forest stands
63%
Acta Biologica Cracoviensia. Series Botanica
|
2017
|
tom 59
|
nr 1
EN
Genetic diversity is often considered a major determinant of long term population persistence and its potential to adapt to variable environmental conditions. The ability of populations to maintain their genetic diversity across generations seems to be a major prerequisite for their sustainability, which is particularly important for keystone forest tree species. However, little is known about genetic consequences of demographic alterations occurring during natural processes of ecological succession involving changes in the species composition. Using microsatellites, we investigated genetic diversity of adult and offspring generations in beech (Fagus sylvatica L.) and oak (Quercus robur L.) populations coexisting in a naturally established old-growth forest stand, showing some symptoms of ongoing ecological succession from oak- to beech- dominated forest. In general, adult generations of both species exhibited high levels of genetic diversity (0.657 for beech; 0.821 for oak), which, however, depended on the sets of selected genetic markers. Nevertheless, several symptoms such as differences in genetic diversity indices between generations, significant levels of inbreeding (up to 0.029) and low estimates of effective population size (48–80) confirmed the declining status of the oak population. On the other hand, the uniform distribution of genetic diversity indices across generations, low levels of inbreeding (0.004), low genetic differentiation among adults and offspring and, most importantly, large estimates of effective population size (119–716), all supported beech as a successive and successful tree species in the studied forest stand.
11
Content available Habitat conditions of the endangered species Salix myrtilloides in Eastern Poland
63%
Serafin A. , Pogorzelec M. , Banach B. , Mielniczuk J.
Dendrobiology
|
2015
|
tom 73
EN
Changes in habitat conditions in the area of Eastern Poland (Polesie Podlaskie), often associated with anthropopressure, cause a reduction in the number of locations and population size of valuable and rare bog plant species, including a Pleistocene boreal relict, Salix myrtilloides. The aim of this study was to determine the current conditions of occurrence of this species based on the physico-chemical parameters of peatland piezometric groundwater. The results confirm the declining trend in the number of locations and abundance of this species in the past few decades, but at the same time they confirm the wide range of amplitude of the many investigated factors. Among the groundwater parameters studied, the low level of nitrogen fractions, phosphorus fractions, cations, and DOC can be considered to be a set of conditions promoting the preservation of the Salix myrtilloides population. The higher concentrations of phosphates, sulfates, Na, Ca, and Mg as well as higher pH and electrolytic conductivity can be considered to be presumably unfavorable. The lack of significant differences in the values of the piezometric water factors investigated for the sites with different population sizes of the studied species requires the identification of other limiting factors and the implementation of programs for its active protection in Poland.
12
Content available "Piękno nieoczywiste". Rola miejskich nieużytków w kształtowaniu nowej kategorii parków miejskich
51%
Jakubowski K.
Przestrzeń i Forma
|
2015
|
tom nr 24/2
145--162
PL
Poszukiwanie nowej formy przestrzennej i estetycznej terenów silnie przekształconych, nieużytków urbanistycznych i zieleni nieurządzonej uwzględnia ich współczesną funkcję społeczną i środowiskową, w tym zachodzące spontanicznie procesy przyrodnicze. W wielu europejskich miastach dąży się do ochrony niezagospodarowanych przestrzeni oraz ich udostępnienia społecznościom miejskim w granicach nienaruszających uwarunkowań środowiska. Postulat zachowania naturalnego charakteru terenów niezorganizowanych znajduje nowe uzasadnienie w obrębie nowo powstających parków i osiedli.
EN
The quest for spatial and aesthetic form for strongly transformed areas, urban wastelands and non-arranged green areas accounts for their modern social and environmental function, including spontaneous natural processes. Many European cities aim at protecting undeveloped space and rendering it available to urban communities without compromising natural conditions. Newly created parks and residential estates are places where the idea to preserve natural character of unorganised areas can become reality.
13
Short-term study on the early succession stages of fouling communities in the coastal zone of Puck Bay (Southern Baltic Sea)
51%
Dziubinska A. , Szaniawska A.
Oceanological and Hydrobiological Studies
|
2010
|
tom 39
|
nr 4
14
Content available remote Akumulacja materii organicznej, węgla i azotu w procesie sukcesji inicjalnej gleby na nierekultywowanych fragmentach wyrobiska po kopalni piasku
51%
Pietrzykowski M. , Krzaklewski W.
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski
|
2004
|
tom nr 131(12)
307-317
PL
W pracy przedstawiono wyniki badań nad kumulacją materii organicznej, węgla i azotu oraz wybranymi właściwościami próchnicy inicjalnych gleb tworzących się pod zbiorowiskami z sukcesji na nierekultywowanych fragmentach wyrobiska po kopalni piasku. Stwierdzono przyrost miąższości inicjalnego poziomu akumulacji próchnicy (Ai) oraz kumulację materii organicznej, węgla i azotu w czasie. Nastąpił wzrost procentowego udziału węgla związanego z grupą kwasów huminowych i fulwowych w stosunku do pozostałego węgla w materii organicznej. Wykazano progresywny przebieg procesu rozwoju gleb pod zbiorowiskami z sukcesji.
EN
The results of research on organic matter, Carbon and Nitrogen accumulation and on selected properties of initial humus in soils building up under communities resulting from succession on an area of a sandpit works were presented. A growth of thickness in the initial humus accumulation horizon (Ai) and an accumulation of organic matter, Carbon and Nitrogen over time was found. A growth of percentage content of Carbon related to a group of humic and fulvic acids in soils was established in the post-extraction humus compared to remaining Carbon. The data indicates a progressive course of the soil development process under communities from succession on sandpit works.
15
Structure of pioneer communities of Mesostigmata mites [Arachnida, Acari] at initial stages of ecological succession on galena-calamine mining wastelands
44%
Madej G. , Skowronska I.
Acta Biologica Silesiana
|
1994
|
tom 26
81-93
16
Ocena zmian zachodzących w zgrupowaniach roztoczy z rzędu Mesostigmata (Arachnida, Acari) w różnych stadiach sukcesji ekologicznej zwałów kopalnictwa węglowego
32%
Madej G. , Tomczok J.
Acta Biologica Silesiana
|
1990
|
tom 16
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