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Books > Earth & environment > Geography > Physical geography > General
The U.S. Geological Survey Puget Sound Ecosystem Portfolio Model is
a decisions-support tool that uses scenarios to evaluate where,
when, and to what extend future population growth, urban growth,
and shoreline development may threaten the Puget Sound nearshore
environment.
Threshold concepts are used in research and management of
ecological systems to describe and interpret abrupt and persistent
reorganization of ecosystem properties (Walker and Meyers, 2004;
Groffman and others, 2006). Abrupt change, referred to as a
threshold crossing, and the progression of reorganization can be
triggered by one or more interactive disturbances such as land-use
activities and climatic events (Paine and others, 1998). Threshold
crossings occur when feedback mechanisms that typically absorb
forces of change are replaced with those that promote development
of alternative equilibria or states (Suding and others, 2004;
Walker and Meyers, 2004; Briske and others, 2008). The alternative
states that emerge from a threshold crossing vary and often exhibit
reduced ecological integrity and value in terms of management goals
relative to the original or reference system. Alternative stable
states with some limited residual properties of the original system
may develop along the progression after a crossing; an eventual
outcome may be the complete loss of pre-threshold properties of the
original ecosystem.
This book provides an up-to-date and comprehensive report on the
soils of Wisconsin, a state that offers a rich tapestry of soils.
It discusses the relevant soil forming factors and soil processes
in detail and subsequently reviews the main soil regions and
dominant soil orders, including paleosols and endemic and
endangered soils. The last chapters address soils in a changing
climate and provide an evaluation of their monetary value and crop
yield potential. Richly illustrated, the book offers both a
valuable teaching resource and essential guide for policymakers,
land users, and all those interested in the soils of Wisconsin.
In 2012, the FAA and USDA continued to make great progress with its
multifaceted approach for mitigating wildlife strikes. The FAA
ensured that 100 percent of Part 139 airports have completed a
Wildlife Hazard Assessment (WHA), are in the process of conducting
a WHA, or have taken a Federal grant to conduct a WHA. Strike
reporting continued to increase, especially with General Aviation
(GA) aircraft, which increased strike reporting by 11 percent
between 2011 and 2012. The FAA implemented three performance
metrics to monitor strike reporting trends and GA wildlife
mitigation. The performance metrics include percentage of damaging
strikes, strike reporting rates, and tracking of General Aviation
(GA) airports that conduct WHAs and site visits. We also issued a
final Advisory Circular (AC) on strike reporting and draft ACs on
WHA methodology and requirements for federally obligated public
airports to conduct WHAs.
The myriad definitions of soil/ecosystem quality or health are
often driven by ecosystem and management concerns, and they
typically focus on the ability of the soil to provide functions
relating to biological productivity and/or environmental quality
(Doran and Parkin, 1994; Karlen and others, 1997). A variety of
attempts have been made to create indices that quantify the
complexities of soil quality and provide a means of evaluating the
impact of various natural and anthropogenic disturbances.
A Kind of Magic is a three-volume novel of eco-magical realism.
It's a book about transition: from childhood to adolescence; from
isolation to community; from passivity to action. From fantasy to
the real world. It is deliberately aimed at 4th - 6th graders, and
can be read as a whole or as three short school library books. A
Trick of the Light/Turtle Crossing/ThunderHawk: A Trilogy of short
books for middle-grade readers; following a boy's awakening to the
beauties and needs of the natural world around him, with the help
of his friends, his family, his community and the mysterious spirit
of the forest.
This document describes a protocol to monitor five terrestrial
plant communities in seven national parks within the Pacific Island
Network (PACN).
The purpose of the National Park Service (NPS) Inventory &
Monitoring (I&M) Program is to develop and provide
scientifically credible information on the current status and
long-term trends of the composition, structure, and function of
park ecosystems, and to determine how well current management
practices are sustaining those ecosystems. As part of the NPS's
effort to improve park management through greater reliance on
scientific knowledge, a primary role of the I&M Program is to
collect, organize, and make available natural resource data and to
contribute to the NPS institutional knowledge by transforming data
into information through analysis, synthesis, and modeling of
specific key vital signs. The I&M Program defines vital signs
as a subset of physical, chemical, and biological elements and
processes of park ecosystems that is selected to represent the
overall health or condition of park resources, known or
hypothesized effects of stressors, or elements that have important
human values.
Since the late 1970s, the NPS Air Resources Division (ARD) has
managed a comprehensive air quality program, emphasizing the
collection of credible air quality information to support
scientifically sound resource management decisions in parks. In
general, air quality monitoring in parks, including monitoring of
atmospheric deposition, ozone, and visibility, is done in
conjunction with national networks. The authors describe the
atmospheric deposition monitoring protocol.
Vegetation classification and mapping was conducted at Weir Farm
National Historic Site during the fall of 2003 and the summers of
2004 and 2005, creating a current digital geospatial vegetation
database for the park. There are nine natural vegetation types that
occur in the park; four upland forest types, one upland
non-vascular type, two forested wetland types, and two wetland
shrub thicket types that reflected the soil moisture conditions of
the site. In addition, four anthropogenic vegetation types
occurred; one successional forest and three non-forested types (two
in mowed upland fields, and one herbaceous wetland seep). Each of
these is described in detail in this report.
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