Results 51 to 60 of about 2,120 (179)

Sistema reprodutivo de Sparattosperma leucanthum (Vell.) K. Schum. (Bignoniaceae) The reproductive system of a Sparattosperma leucanthum (Vell.) K. Schum. (Bignoniaceae)

Revista Árvore, 2009
Sparattosperma leucanthum (Vell.) K. Schum. (Bignoniaceae) é uma árvore polinizada por mamangavas, apesar de outros visitantes florais explorarem néctar ou pólen das flores sem exercerem benefício reprodutivo.
Leandro Pereira Polatto, Valter Vieira Alves Júnior   +1 more
doaj   +1 more source

Is urbanisation a barrier to genetic diversity in the solitary specialist bee, Melissodes druriellus?

Insect Conservation and Diversity, EarlyView.
Bees are integral pollinators commonly found in and supported by urban green spaces; however, their eco‐evolutionary response to urbanisation varies interspecifically. While several studies have explored the population and landscape genetics of bees in response to urbanisation, few have examined solitary or specialist species which may be more ...
Anthony C. Ayers, Sargon Yousefian Dezag Tekkie, S. Eryn McFarlane, Sandra M. Rehan   +3 more
wiley   +1 more source

Seasonal shifts in network structure and species roles in a tropical island plant–flower visitor community Cambios estacionales en la estructura de la red de interacciones entre plantas y visitantes florales y en los roles de las especies en una comunidad insular tropical

Insect Conservation and Diversity, EarlyView.
Constant visitation rates across the flowering season masked major shifts in plant and flower visitor interaction structure, specialization, species roles and trait‐driven patterns shaping interaction intensity. Plants and flower visitors changed ecological roles over time, with native flower visitors playing key roles in maintaining network cohesion ...
Alba Costa, Julia Jaca, Christopher N. Kaiser‐Bunbury, Anna Traveset   +3 more
wiley   +1 more source

Colonização e biologia reprodutiva de mamangavas (Xylocopa frontalis) em um modelo de ninho racional Colonization and reproductive biology of carpenter bees (Xylocopa frontalis) in a model of rational nesting box

Ciência Rural, 2003
As mamangavas (Xylocopa spp.) são importantes polinizadores, mas o seu criatório para introdução em áreas agrícolas tem sido dificultado pelo hábito de nidificação dessas abelhas.
José Hugo de Oliveira Filho, Breno Magalhães Freitas   +1 more
doaj   +1 more source

New species and designation of primary types in Neotropical carpenter bees of the genus Xylocopa Latreille (Hymenoptera, Apidae)

Journal of Hymenoptera Research, 2017
We describe and figure two distinctive new species of Neotropical carpenter bees of the genus Xylocopa, X. (Schonnherria) barbarae sp. n. from Bolivia, and X. (Schonnherria) bigibbosa sp. n. from Peru. To stabilize the names, we designate a neotype for X.
Mariano Lucia, Victor H. Gonzalez
doaj   +3 more sources

The Agencies of the European Union: A Glimmer of Hope for Enlargement?

JCMS: Journal of Common Market Studies, EarlyView.
Abstract In recent years, the process of EU enlargement has become increasingly difficult. The longer the process drags on and the less likely accession appears, the more the candidate states are discouraged and the less influential the EU becomes. A different approach to integration must therefore be used.
Matis Poussardin
wiley   +1 more source

Comparative assessment of hemolymph composition and bioactivity in different bee species

Journal of Basic and Applied Zoology
Background Hemolymph, as mediator of immune responses and nutrient circulation, can be used as physiological marker of an insect’s health, environmental quality or ecological adaptations.
Salma A. Elfar, Iman M. Bahgat, Mohamed A. Shebl, Mathieu Lihoreau, Mohamed M. Tawfik   +4 more
doaj   +1 more source

Do Women Executives Make Workplaces Safer? Evidence from Workplace Safety Violations

Journal of Management Studies, EarlyView.
Abstract In this study, we develop and test theory on whether, when, and how the prevalence of women in firms’ top management influences workplace safety – an important ‘do no harm’ dimension of corporate social performance. Consistent with our theorizing, we find that there is a negative relationship between the prevalence of women executives in firms’
Yangyang Chen, Emmanuel Ofosu, Don O’Sullivan, Shi Tang, Leon Zolotoy   +4 more
wiley   +1 more source

Powderpost Beetles and Other Wood-Infesting Insects

EDIS, 1999
This document provides an overview of powderpost beetles and other wood-infesting insects, detailing their identification, life cycles, and the damage they cause to wooden structures.
P.G. Koehler
doaj   +1 more source

Beyond Quality and Quantity: Enriching the Study of Organizational Attention

Journal of Management Studies, EarlyView.
Abstract This Counterpoint advances the study of organizational attention by proposing an ‘expansive’ rather than a ‘substitutive’ development of the attention‐based view (ABV) as proposed in the Point. While endorsing a richer understanding of attention, we caution against reinforcing unhelpful dichotomies between quality and quantity of attention. We
Davide Nicolini, Matthew Hurst, Jeanne Mengis, Manuel Baeriswyl   +3 more
wiley   +1 more source