Headwater streams constitute the majority of stream length of river systems, and have important roles in terms of landscape processes and as habitat for organisms. These bodies of water are also tightly coupled with the local terrestrial landscape, making them ideal for studying linkages between land use and stream condition. Despite the ubiquity and importance of these streams, they are often ...

Omnivores can impact ecosystems via opposing direct or indirect effects. For example, omnivores that feed on herbivores and plants could either increase plant biomass due to the removal of herbivores or decrease plant biomass due to direct consumption. Thus, empirical quantification of the relative importance of direct and indirect impacts of omnivores is needed, especially the impacts of invas...

A checklist of trichopteran species in the middle and lower basins Jinsha River (southwestern China) is compiled for first time. upon collected materials. It recorded ten families, 13 genera, 23 were recorded. Among them, male a new Cheumatopsyche latisecta Ge & Sun, sp. nov., which can be diagnosed by its genitalia, described illustrated. In addition, nine other are time from China, six th...

The ability to tolerate disturbance is a defense strategy that minimizes the effects of damage to fitness and is essential for sustainability of populations, communities, and ecosystems. Despite the apparent benefits of tolerance, there may be an associated cost that results in a deficiency of a system to respond to additional disturbances. Aquatic ecosystems are often exposed to a variety of n...

iv FOREWORD Chapters 2, 3, 4, and 5 are either in review, in revision or will be submitted, and thus are formatted according to specific journal formats: Ecology (Chapter 1), Hydrobiologia Food webs and aquatic ecology of subtropical South American streams are poorly understood. I investigated the trophic structure of the upper Rio Cuareim (Uruguay, South America). I analyzed the stable isotope...