Much of the convenience of modern life resides in sheet metal, the cowling shield of most machines and appliances. However, the load that this takes off human shoulders has to be carried elsewhere, and the Earth has borne the burden. Many of us woke up to the environmental cost when over a century of industrialization finally surpassed the capacity of nature to assimilate it. International in scope, Heavy Metals in the Environment: Using Wetlands for Their Removal discusses wetland functions and heavy metal contamination.
Kent, Donald M. “Evaluating Wetland Functions and Values” Applied Wetlands Science and Technology Editor Donald M. Kent Boca Raton: CRC Press LLC,2001
Evaluating Wetland Functions and Values
The Mekong River Delta in Vietnam can be considered as a large tropical wetland, in which two typical eco-forest wetlands can be distinguished: the inland Melaleuca forest wetlands and the coastal mangrove forest wetlands. Their main functions are the provision of forest commodities, the regulation of the water balance and biodiversity conservation. However as elsewhere under human pressure their existence is under the threat of forest fires and deforestation. Their protection requires the implementation of a multi-level national or sub-national planning policy.
Compared to other ecosystems, wetlands have received an exceptional amount of
attention. Wetlands are valuable as sources, sink and transformers of a multitude
of chemical, biological and genetic materials. They stabilize water supplies, clean
polluted waters, protect shorelines, and recharge groundwater aquifers. They have
increasingly become recognized for their unique ecological functions in the
environment and are the focus of increased research by scientists and study
programs by schools, communities, and nature centers.
The Society of Wetland Scientists’ book series, Global Change Ecology and Wetlands, emerged
from the Society’s Global Change Ecology Section. There is a growing need among wetlands
managers and scientists to address problems of climate change in wetlands, and this series will fi ll
an important literature gap in the fi eld of global change as it relates to wetlands around the world.
Having defined long-term objectives it is necessary to assess how the present situation
matches the desired situation. The key issue is identification of the potential of, and
constraints upon, the present management capacity and capability in relation to carrying
out the management functions defined in the long-term objectives. Such aspects as
suitability of institutional framework, number of staff, recruitability of relevant new staff,
educational background, and availability of financial resources should be considered.
Wetlands provide a special case in point. They are used by fisherfolk, hunters, charcoal makers,
pastoralists and agriculturalists under traditional resource sharing regimes at different seasons, and
also harbour a wide variety of fauna and flora. Ensuring compatibility among such a wide set of users
poses special challenges. Conventional access rights are particularly hard to define, since water levels
are not the same each year and patterns of flooding are erratic.
Lean Produces Significant Resource Productivity Improvements with Important
Environmental Improvement and Sustainability Implications. Through the adoption of a
combination of Lean strategies (identifying and retooling the value chain, adopting product-aligned,
cross-functional manufacturing, designing for manufacturability, and taking a “whole system
view”), Boeing has substantially reduced the amount of energy, raw materials, and non-product
output associated with its manufacturing processes.
Wetlands are the ecotonal or transitional zones between terrestrial and aquatic ecosystems
where the water table is usually at or near the surface of the land, which is covered by the
shallow water (Mitsch & Gosselink, 1986). Due to these characteristics, wetlands provide
opportunities for adaptations to different plant and animal species with high diversity of
life-forms. Thus wetlands are among the most biologically diverse and productive
ecosystems on earth.
From the early explorers onwards, visitors to the
Arctic and to Antarctica have commented with
great interest on the presence of lakes, wetlands, and
fl owing waters. These environments encompass a
spectacular range of conditions for aquatic life, from
dilute surface melt ponds, to deep, highly stratifi ed,