Search results for "lien"
showing 10 items of 1874 documents
A new synonym and a new combination in Stipa aliena Keng (Poaceae: Stipa sect. Regelia)
2015
Stipa section Regelia comprises three species occurring in mountainous areas of Central Asia. One of them, S. smithii , was described by Martinovský in 1970, but the taxon has been overlooked in later taxonomical studies. The species was described with two varieties, var. smithii and var. macrocarpa . As a result of our taxonomical studies, we find the typical variety of the taxon to be conspecific with Stipa aliena , and propose that the second one be recognized as Stipa aliena var. macrocarpa comb. nov. Remarks on species belonging to section Regelia and micromorphological patterns of their lemma morphologies are discussed. A key to species close to S. aliena is provided.
Effects of Caulerpa cylindracea Sonder (Chlorophyta Caulerpaceae) on marine biodiversity
2019
The chief purpose of Marine Protected Areas (MPAs) is biodiversity conservation. The effects that invasive alien species (IAS) have on MPAs are not yet fully known, even though assessing them is fundamental. Effective management plans, indeed, also require knowledge on the dis- tribution, spread dynamics and impact of IAS. We report first observations on the effects of Caulerpa cylindracea Sonder (Chlorophyta Caulerpaceae) on the communities living along the coasts of the Island of Favignana (Egadi Islands MPA, Sicily, Italy). We found that C. cylindracea may have negative effects on the habitat where it settles in two different ways: a) affecting the structure of the native algal community…
First report of Cotoneaster pannosus Franch. (Rosaceae) in Tarragona Province, and updated distribution area in Spain
2015
8 p., il., mapas
Invasive Alien Plants in Sub-Saharan Africa: A Review and Synthesis of Their Insecticidal Activities
2021
Despite the cornucopia of agricultural, economic and ecological ramifications of invasive alien plant species (IAPs) in sub-Saharan Africa, studies on their potential use as bio-insecticides have not received adequate attention compared to the burgeoning plethora of literature on their use in ethnomedicine. In the current study, we review the existing, but scattered literature on the insecticidal activity of different parts of some IAPs; specifically those invasive in sub-Saharan Africa but with published literature from Africa and elsewhere. From our literature survey, we found that 69 studies from four continents (Africa, Asia, North America and South America) reported the insecticidal ac…
Pythium deliense causing severe damping-off of cucumber seedlings and its biological control by soil bacteria
1996
Abstract Pythium deliense Meurs was isolated from cucumber plant debris and was found to be highly pathogenic to cucumber seedlings, causing severe damping-off disease. The fungus however was completely inhibited by a soil bacterium SU-48.1. In vitro and in vivo studies reveal that the disease can be controlled by using this bacterium. The details of the parasitic fungus, the antagonism between the fungus and the bacteria, and the biological control of the disease, are described in this article.
Inhibition of Lymphocyte Proliferation during Parasitic Infection with Nippostrongylus Brasiliensis
1979
It is now well established that parasitic infections can lead to the production of high titers of IgE anti parasitic antibodies in experimental animals and in man (1,2). One of the best studied experimental systems involves the ability of the nematode parasite Nippostrongylus brasiliensis (N.B.) to stimulate a high titer reaginic antibody response to worm antigens in the rat. These studies were extended by the reports of Orr and Blair that parasitic infections can cause non specific proliferation of IgE antibody response against antigens unrelated to those of the parasite (3). The amplification of an already existing IgE antibody response can be induced before infection by inoculating the a…
IL-27 enhances the lymphocyte mediated innate resistance to primary hookworm infection in the lungs
2020
AbstractInterleukin-27 (IL-27) is a heterodimeric cytokine of the IL-12 family, formed by non-covalent association of the promiscuous EBI3 subunit and selective p28 subunit. IL-27 is produced by mononuclear phagocytes and unfolds pleiotropic immune-modulatory functions through high affinity ligation to IL-27 receptor alpha (IL-27RA). While IL-27 is known to contribute to immunity and to end inflammation following numerous types of infections, its relevance for host defense against multicellular parasites is still poorly defined. Here, we investigated the role of IL-27 during infection with the soil-transmitted hookworm, Nippostrongylus brasiliensis, in its early intrapulmonary life cycle. I…
Augu sugu daudzveidība un tās palielināšana piemājas zālienos: Latvijas Dabas fonda akcijas “Iesēj savu kvadrātmetru!” pieredze
2022
Mēs šobrīd dzīvojam bioloģiskās daudzveidības krīzes laikā, kad gan lauksaimniecības ainavās, gan urbānās teritorijās biodaudzveidība samazinās. Dzīvības saliņas zālienos ir nozīmīgas augu sugu izplatīšanās iespējām ainavā. Urbānajām teritorijām izplešoties, cilvēki vairs nepavada tik daudz laika dabā, tāpēc dabas izglītība pilsētvidē ieņem arvien svarīgāku lomu. Akcija “Iesēj savu kvadrātmetru!” aicināja iedzīvotājus piedalīties bioloģiskās daudzveidības saglabāšanā. Bakalaura darba mērķis ir novērtēt augu sugu ieviešanās sekmes zālienos atkarībā no augšanas apstākļiem, kā arī raksturot akcijas dalībnieku iesaistes līmeni. Autore veica lauka pētījumus akcijas dalībnieku iesētajos kvadrātme…
B4R Branding4Resilience. Tourist infrastructure as a tool to enhance small villages by drawing resilient communities and new open habitats
2021
“Marginal” areas are a central issue that is being discussed all over Europe. Indeed, more than 60% of the European population live in peripheral contexts outside of main urban conurbations (Data “EUROSTAT regional yearbook 2013”. Data referred to the sum of the population in ‘intermediate regions’ and in ‘rural areas’ in the EU27). Yet, the contexts addressed by the Italian National Strategy on Inner Areas (covering approximately the 60 per cent of Italy and hosting nearly 13.540 million people) are often lacking successful regional policies and systemic territorial approaches to achieve effective transformations. In order to tackle with such fragile areas, a new development path has to be…
Branding as a lever for resilient transformation
2020
The branding impulse can catalyse tourism and community’s resilience promoting the reactivation of small towns through targeted transformations of built heritage and unused building stock, social innovation initiatives, and new forms of production. It can create a more adaptive process and opportunities for networks of small villages in inner areas where tourism can merge with different work/life models. The B4R work in Sicani hills in Sicily offers a framework for the region’s development and manages to describe a path for activate “reserves of resilience” for new sustainable lifestyles. The settlement development options that the study displays can be used as a model for similar considera…