The Biology of Gall-Inducing Arthropods

The Biology of Gall-Inducing Arthropods
Author: Gyuri Csoka
Publisher: Createspace Independent Pub
Total Pages: 338
Release: 2012-10-22
Genre: Science
ISBN: 9781480165168

This publication explores many facets of the ever intriguing and enigmatic relationships between plants and their gall-forming herbivores. The research reported herein ranges from studies on classical biology and systematics of galling to molecular phylogeny, population genetics, and ecological and evolutionary theory. Human kind has much to learn and gain from understanding the fine details of how plants and their gallers interact. This publication is the result of an international symposium that was held August, 1997 in Hungary. It was organized under the guidelines of the International Union of Forestry Research Organizations by the Hungarian Forest Research Institute, Department of Forest Protection, and the North Central Research Station of the US Forest Service.

Forests and Food

Forests and Food
Author: Bhaskar Vira
Publisher: Open Book Publishers
Total Pages: 290
Release: 2015-11-15
Genre: Nature
ISBN: 1783741937

As population estimates for 2050 reach over 9 billion, issues of food security and nutrition have been dominating academic and policy debates. A total of 805 million people are undernourished worldwide and malnutrition affects nearly every country on the planet. Despite impressive productivity increases, there is growing evidence that conventional agricultural strategies fall short of eliminating global hunger, as well as having long-term ecological consequences. Forests can play an important role in complementing agricultural production to address the Sustainable Development Goals on zero hunger. Forests and trees can be managed to provide better and more nutritionally-balanced diets, greater control over food inputs—particularly during lean seasons and periods of vulnerability (especially for marginalised groups)—and deliver ecosystem services for crop production. However forests are undergoing a rapid process of degradation, a complex process that governments are struggling to reverse. This volume provides important evidence and insights about the potential of forests to reducing global hunger and malnutrition, exploring the different roles of landscapes, and the governance approaches that are required for the equitable delivery of these benefits. Forests and Food is essential reading for researchers, students, NGOs and government departments responsible for agriculture, forestry, food security and poverty alleviation around the globe.

Annotated Keys to the Genera of Nearctic Chalcidoidea (Hymenoptera)

Annotated Keys to the Genera of Nearctic Chalcidoidea (Hymenoptera)
Author: Gary A. P. Gibson
Publisher: NRC Research Press
Total Pages: 814
Release: 1997
Genre: Science
ISBN: 9780660166698

This publication presents illustrated keys to the 19 families and 706 described genera of Chalcidoidea known to occur in the Nearctic region (minimally America north of Mexico, but also including those areas of Mexico generally considered as having a Nearctic insect fauna). The first three chapters provide an introduction to this superfamily of wasps, most of whose members are parasites of other insects; a review of chalcidoid morphology as related to terms used in the keys & diagnoses; and an overview of the superfamily, including a 41 couplet key to families. Each of the remaining 19 chapters reviews one family & includes sections on recognition, systematics & relationships, biology, literature, an annotated key to the Nearctic genera, and for larger families an index to genera based on couplet number. Over 1,800 line drawings & electron micrographs illustrate the keys. Annotations include references to existing keys to species, estimated number of species, and known distribution & host range in the region.