Photo 1: Los Quetzales National Park, located at 3.020 m a.s.l. in the Pacific slope of Talamanca Mountain Range, Costa Rica. This area includes Cerro de la Muerte with largest extent paramo ecosystem country, which is a grass- or shrub-dominated cool and wet upper slopes Neotropical mountains. credit: María A. Maglianesi. 2: The honeybee Apis mellifera visiting Vaccinium consanguineum. bee spe...

Abstract Context Tropical mountains are hotspots of plant diversity, with a remarkable density narrow ranged and endemic species. To develop effective in situ strategies for the conservation species under changing climatic conditions we need to understand mechanisms that shape their distributions. Objectives We explore how disturbance shapes elevation ranges two shrubs eight tree ( Hypericum ir...

In this paper we define an order structure on the $p$-operator projective tensor product of Herz algebras and we show that the canonical isometric isomorphism between $A_p(Gtimes H)$ and $A_p(G)widehat{otimes}^p A_p(H)$ is an order isomorphism for amenable groups $G$ and $H$.

In the last decade, considerable attention has been paid by graph theorists to the study of spectra of graphs and their interaction with structure and characteristic properties of graphs. After the 'classical' book by N. L. Biggs [12] on algebraic graph theory in general, the first comprehensive monograph on this particular topic, by D. M. Cvetkovic, M. Doob and H. Sachs [34], appeared in 1979....