Search results for "anger"

Does Forest Fragmentation and Selective Logging Affect Seed Predators and Seed Predation Rates of Prunus africana (Rosaceae)?

2007

Forest fragmentation and selective logging can influence the life cycle of tropical tree species at several levels, e.g., by lowering pollination, by limiting seed dispersal, and by increasing seed predation. Understanding human-induced modifications in ecosystem processes such as seed predation is essential for conservation management of threatened species. We studied the impact of forest fragmentation and selective logging on seed predation of the endangered tree Prunus africana in the tropical rain forest of Kakamega, Kenya. We quantified the activity of seed predators in the main forest, forest fragments, and in sites of different logging intensity in the dry and rainy seasons of 2003 a…

Hope, Self-Efficacy, Prosocial and Aggressive Behavior, and the Anger and Frustration Scale for Mexican Drivers

2019

Penser l'altérité : de l'expérience sensible à la figure sensible de l'étranger

2016

International audience; La figure de l’étranger est une figure qui puise son sens dans une relation d’altérité familiarisée. De Simmel (1908) à Ricœur (1990) ou à Todorov (1989), l’étranger est cet Autre proche, qui renvoie en négatif à un Je ou à un Nous qui se construit dans la différence. Rêvée, recherchée, fantasmée, crainte, fuie ou haïe, la figure de l’étranger peut condenser toutes les aspirations et toutes les peurs. L’ambition de ce chapitre est de mieux comprendre les mécanismes représentationnels associés à cette figure bien particulière. Comment influencent-ils nos interactions sociales avec des « étrangers » ? Comment la figure sensible de l’étranger se déploie-t-elle au quotid…

Explicit Granger causality in kernel Hilbert spaces

2020

Granger causality (GC) is undoubtedly the most widely used method to infer cause-effect relations from observational time series. Several nonlinear alternatives to GC have been proposed based on kernel methods. We generalize kernel Granger causality by considering the variables cross-relations explicitly in Hilbert spaces. The framework is shown to generalize the linear and kernel GC methods, and comes with tighter bounds of performance based on Rademacher complexity. We successfully evaluate its performance in standard dynamical systems, as well as to identify the arrow of time in coupled R\"ossler systems, and is exploited to disclose the El Ni\~no-Southern Oscillation (ENSO) phenomenon f…

Effects of dissatisfaction in tourist services: The role of anger and regret

2011

Abstract Dissatisfied customers due to a service failure probably will switch the provider, will complain and/or will spread negative word-of-mouth. However, to what extent some specific emotions triggered by dissatisfaction can mediate between the latter and the previous mentioned behaviours? A sample of 359 users of restaurants and 308 users of hotel services has shown that, whereas anger has a significant influence on the three behaviours under study, regret only affects switching and negative word-of-mouth. Furthermore, slight differences between hotels and restaurants have been found because, in the case of restaurants, anger is not an antecedent of switching whereas regret has an inve…

Micropropagation of Endemic Endangered Taxa of the Italian Flora: Adenostyles alpina subsp. macrocephala (Asteraceae), as a Case Study

2023

The conservation of endangered, rare, and endemic plant species is based on in situ and ex situ conservation strategies. When in situ conservation alone is not sufficient to guarantee the survival of the species, ex situ techniques are adopted in support. This study aimed to develop an efficient micropropagation protocol for Adenostyles by evaluating the effect of different plant growth regulators on leaf explants. Adenostyles alpina subsp. macrocephala (Asterace) is a perennial herbaceous plant endemic to Calabria (Southern Italy). The genus Adenostyles includes three species confined to the mountains of the Mediterranean and southern Europe. For callus induction, media supplemented with d…

Combining ecological engineering and plant conservation on a Mediterranean islet

2012

This paper reports the results of a bioengineering intervention within the Mediterranean Basin carried out at Lampedusa Island (Strait of Sicily) on the “Spiaggia dei Conigli”, the only sand shore of all Sicilian territory where the sea turtle Caretta caretta lays its eggs every year. The erosion of the steep slope over the beach itself caused sensitive changes in the grain size of shore’s sediment and reduced the area of the beach with fine sand suitable for C. caretta oviposition. In order to reduce surface water flow and to stop erosion, several bioengineering options were adopted using only native plant species to preserve local botanical heritage and to prevent the local extinction of …

Metagenomic strategies to assess genetic diversity in Phytophthora species

Seed germination in Abies nebrodensis (Pinaceae)

2019

Abies nebrodensis is a strict Sicilian endemic species, listed as “Critically Endangered” in the IUCN Red List of Threatened Species. Seed production highly varies annually and among specimens. The species is affected by a very low seed germination rate, mainly depending on the large number of empty seeds (from 68 to 96%). The embryo presence in seeds increases with increasing seed size and weight. Optimal germination rate (61%) was achieved at constant 5°C in the darkness. The low proportion of embryos in seeds is a relevant threat for A. nebrodensis conservation, as it affects the intrapopulation genetic diversity and reduces the potential genetic variability of seed accessions preserved …

Flower and fruit structure of the endangered species Petagnaea gussonei (Sprengel) Rauschert (Saniculoideae, Apiaceae) and implications for its repro…

2015

Petagnaea gussonei (Apiaceae) is an endangered species endemic to the Nebrodi mountains (north-eastern Sicily). Although an increasing number of studies have been performed on this species, its reproductive biology remains poorly understood. The aim of this study was to investigate in detail the structure of the flower and the fruit of Petagnaea, and the possible implications for its breeding system and seed dispersal mechanism. Results from fieldwork, light microscopy and scanning electron microscopy suggest (1) the presence of protandrous hermaphrodite flowers; (2) geitonogamy, autogamy, and allogamy as breeding system mechanisms of P. gussonei, even if asexual reproduction is preferred b…