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Sinalização entre plantas e bactérias

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This chapter discusses the evidence that allows for a first characterization of macroecological patterns in macroalgae. There is little doubt that macroalgal species richness does not always increase toward the tropics, as is the case for most kinds of macroscopic organisms in terrestrial and marine habitats. In all the floras examined, there is a tendency for species to have smaller mean latitudinal ranges in the areas of greater species richness, but this is independent of the latitudinal patterns of species richness. For the macroalgae, using coastline length as a surrogate for area, there is a significant correlation between coastline length and species richness. Both local species richness and the productivity and morphological effects of upwelled waters seem determined by regional factors as well as local interactions. Although latitudinal patterns of macroalgal morphologies can be traced in many areas, the explanations of such patterns remain elusive, but there is little understanding of the selective advantages of the different types of macroalgal morphologies. Latitudinal patterns of growth types, on the other hand, suggest increases in clonal species richness in warmer waters.
Book
Systematics: A Course of Lectures is designed for use in an advanced undergraduate or introductory graduate level course in systematics and is meant to present core systematic concepts and literature. The book covers topics such as the history of systematic thinking and fundamental concepts in the field including species concepts, homology, and hypothesis testing. Analytical methods are covered in detail with chapters devoted to sequence alignment, optimality criteria, and methods such as distance, parsimony, maximum likelihood and Bayesian approaches. Trees and tree searching, consensus and super-tree methods, support measures, and other relevant topics are each covered in their own sections. The work is not a bleeding-edge statement or in-depth review of the entirety of systematics, but covers the basics as broadly as could be handled in a one semester course. Most chapters are designed to be a single 1.5 hour class, with those on parsimony, likelihood, posterior probability, and tree searching two classes (2 × 1.5 hours).
Article
Parasitic flowering plants are of great general and scientific interest besides their economic importance when attacking crop plants. This beautifully illustrated book covers all parasitic families and most of the genera and discusses all main aspects of their biology. © 2008 by Koninklijke Brill NV, Leiden, The Netherlands, All rights reserved.