The surface microlayer (SML) is the dividing border between air and water surface. It has physical, chemical biological properties which are distinctly from subsurface layer (SSL) waters. As its unique place air- water, SML remained in a distinct research corner. Surface characterized by capacity to accumulate of organic compounds specially proteins, carbohydrates lipid. presence such as energy...

aquatic environments are often contaminated by various industrial, agricultural and domestic sewage, while different pesticides have markedly different effects on aquatic life. scenedesmus spp. are often used as an indicator to show changes in physico-chemical and environmental conditions of the aquatic ecosystems. this study aimed to investigate the effects of different concentrations of pesti...

Millennial perspectives, like the one prompted by this Special Issue of Aquatic Conser6ation, are challenging. If we look back, we realize the degree of change in culture, technology, science and environmental quality that can occur over such time scales. Consider, for example, that by the turn of the last millennium, our global population was somewhere between 200 and 500 million (Ehrlich et a...

Issues in Ecology is designed to report, in language understandable by non-scientists, the consensus of a panel of scientific experts on issues relevant to the environment. Issues in Ecology was initially supported by the Pew Scholars in Conservation Biology program and is currently supported by the Ecological Society of America. It is published at irregular intervals, as reports are completed....

1. This paper introduces, and summarises the key messages of, a series of papers that emanated from a symposium on the Role of Drought in the Ecology of Aquatic Systems, held in Australia in 2001. 2. Defining drought hydrologically is problematic because the return times, intensity, duration and long-term trends in low-flow periods are specific to regions and times. Droughts may instead be refe...

Introduction Fungi are adapted to a diverse array of freshwater ecosystems. In streams and rivers, flowing water provides a mechanism for downstream dispersal of fungal propagules. The dominant group of fungi in these habitats, aquatic hyphomycetes, have conidia that are morphologically adapted (tetraradiate and sigmoid) for attachment to their substrates (leaf litter andwoody debris from ripar...

Introduction Water is an indispensable part for the sustenance of mankind and the increasing awareness about the environment; especially aquatic ecosystems have attracted the attention of researchers worldwide. A definite need exists to develop a low cost and eco-friendly technology to remove pollutants particularly heavy metals, thereby improving water quality. Phytoremediation offers an attra...

1. Fishing spans all oceans and the impact on ocean predators such as sharks and rays is largely unknown. A lack of data and complicated jurisdictional issues present particular challenges for assessing and conserving high seas biodiversity. It is clear, however, that pelagic sharks and rays of the open ocean are subject to high and often unrestricted levels of mortality from bycatch and target...

1. Lake Rodó is a turbid system, a condition attributed to algal biomass. The proximal source of the eutrophication was stormwater discharges from an ill-defined urban area. This paper describes an attempt to restore the water quality of Lake Rodó, the first time this has been done in Uruguay. In spring 1996 it was drained, sediments were removed and stream inputs were diverted. Groundwater was...

Abstract We evaluated how three widths of buffer zones on greater than or equal to 100-ha wetlands (240, 300, and 390 m) rivers (10, 20, 30 would help meet watershed conservation goals in the Upper Peninsula Michigan, USA, whether doing so also protect each predominant types terrestrial natural communities across landscape. The use (even narrowest assessed) around riparian met exceeded targets ...