Search results for "Specie"
showing 10 items of 4389 documents
The Anti-Cancer Effect of
2019
Ethanolic extracts from Mangifera indica L. have been proved to possess anti-tumor properties in many cancer systems. However, although most effects have been demonstrated with fruit pulp extract, the underlying molecular mechanisms of mango peel are still unclear. This study was designed to explore the effects of mango peel extract (MPE) on colon cancer cell lines. MPE affected cell viability and inhibited the colony formation trend of tumor cells, while no effects were observed in human dermal fibroblasts used as a non-cancerous cell line model. These events were a consequence of the induction of apoptosis associated to reactive oxygen species (ROS) production, activation of players of th…
Stan zachowania gatunków drzew rosnących na rekultywowanych powierzchniach wyrobisk śląskich zakładów przemysłu wapienniczego "Opolwap" S.A
2004
Województwo opolskie charakteryzuje się występowaniem dużych pokładów skał węglanowych. Służą one jako surowiec dla przemysłu cementowo-wapienniczego. Eksploatacja wapieni wiąże się z ogromnymi przekształceniami geomechanicznymi powierzchni ziemi. Jednym z podstawowych problemów wynikających z działalności przemysłu wapienniczego jest rekultywacja terenów przekształconych. W latach 2000-2001 prowadzone były badania dotyczące stanu zachowania upraw leśnych występujących na rekultywowanych powierzchniach Śląskich Zakładów Przemysłu Wapienniczego "Opolwap" S.A w Tarnowie Opolskim. Zakres prac obejmował wykonanie inwentaryzacji drzew oraz określenie ich kondycji zdrowotnej. Powierzchnie badawcz…
Dwa nowe stanowiska twardziaka pucharowatego Neolentinus cyathiformis w Polsce
2018
Neolentinus cyathiformis (Schaeff.) Della Maggiora & Trassinelli (Gloeophyllaceae, Gloeophyllales, Agaricomycetes) to rzadki grzyb, który na aktualnej Czerwonej liście grzybów wielkoowocnikowych w Polsce posiada kategorię gatunku wymierającego E. Pomimo szerokiego zasięgu (Europa, Azja, Ameryka Południowa) jego stanowiska są nieliczne. W Polsce do tej pory znanych było 20 stanowisk tego gatunku, w tym zaledwie dwa w północnej części kraju. Celem artykułu jest zaprezentowanie dwóch nowych stanowisk: w Ogrodzie Botanicznym Uniwersytetu im. Adama Mickiewicza w Poznaniu (woj. wielkopolskie) oraz w północno-wschodniej części kraju we wsi Rejsztokiemie (woj. podlaskie). Na obu stanowiskach owocni…
Subtropical streams harbour higher genus richness and lower abundance of insects compared to boreal streams, but scale matters
2018
Aim: Biological diversity typically varies between climatically different regions, and regions closer to the equator often support higher numbers of taxa than those closer to the poles. However, these trends have been assessed for a few organism groups, and the existing studies have rarely been based on extensive identical surveys in different climatic regions. Location: We conducted standardized surveys of wadeable streams in a boreal (western Finland) and a subtropical (south-eastern Brazil) region, sampling insects identically from 100 streams in each region and measuring the same environmental variables in both regions. Taxon: Aquatic insects. Methods: Comparisons were made at the scale…
Do allopatric male Calopteryx virgo damselflies learn species recognition?
2012
There is a growing amount of empirical evidence that premating reproductive isolation of two closely related species can be reinforced by natural selection arising from avoidance of maladaptive hybridization. However, as an alternative for this popular reinforcement theory, it has been suggested that learning to prefer conspecifics or to discriminate heterospecifics could cause a similar pattern of reinforced premating isolation, but this possibility is much less studied. Here, we report results of a field experiment in which we examined (i) whether allopatric Calopteryx virgo damselfly males that have not encountered heterospecific females of the congener C. splendens initially show discri…
Monitoraggio e valutazione del danno degli insetti defogliatori su diverse specie di Quercus in Sicilia
Most of the insects feeding on oaks are usually ‘in balance’ with their host trees, causing occasional damage. When severe defoliations regularly occur, oak trees vulnerability to the complex of factors causing the overall decline syndrome can increase. Assessing canopy damage due to defoliating insects through the usually adopted visual methods is quite difficult, requiring highly experienced operators and a long time spent to collect field data. The present research has been carried out to investigate the different susceptibility of Sicilian oak species to defoliating insect attacks, in particular the oak moth Tortrix viridana (L.) (Lepidoptera Tortricidae), with the aim to assess the rel…
Justice in and to nature : an application of the broad framework of environmental and ecological justice
2017
This dissertation applies and develops the broad framework of environmental and ecological justice. It is a new relational approach to justice, whose elements have been introduced by David Schlosberg in his works on environmental and ecological justice. The present study provides a systematisation of the framework and applies it to contemporary environmental topics using the methods of conceptual analysis and case-implication critique. The main outcome of this study is that the elements comprising the broad framework of environmental and ecological justice provide fresh and useful insights into topics like species extinctions and ecosystem wellbeing. In particular, the holistic and conflict…
Tree species influences diversity of ground-dwelling insects in afforested fields
2015
Abstract Impaired natural ecosystems, such as agricultural lands, are restored toward original or other target stage. Because the long agricultural history has changed the physical, chemical and biological features of the soil, afforested fields can harbor novel species assemblages and interactions. Our overall aim was to quantify the diversity of ground beetles and ants in early successional afforested fields. In a large scale field experiment, we compared plots that had been afforested 25 years ago by planting monocultures of birch, pine or spruce trees. A total of 4080 carabid individuals representing 41 species, and 131,933 ant individuals representing 15 species were recorded. Both the…
Breeding birds in Burgundy, 2006-2018.
2020
La prise en compte de la stratégie agricole améliore la compréhension de l’effet des pratiques sur les communautés adventices
2019
National audience; Les agriculteurs présents dans une même situation de production peuvent différer dans leurs objectifs et donc leurs pratiques. Afin de tester l’effet d’une pratique particulière (ex. désherbage chimique) sur la communauté adventice, il est donc nécessaire de tenir compte de l’ensemble des autres pratiques, formant une stratégie agricole. Nous avons ainsi développé 14 indicateurs décrivant les pratiques agricoles enquêtées sur la zone de Fénay de 2004 à 2016 auprès des 23 agriculteurs de la zone. L’originalité des indicateurs est qu’ils situent chaque parcelle par rapport aux autres parcelles ayant mis en oeuvre la même culture la même année sur la zone. Ceci nous a permis…