scholarly journals Yellow-breasted Chat and Gray Catbird Productivity in a Fragmented Western Riparian System

2007 ◽  
Vol 119 (3) ◽  
pp. 494-498 ◽  
Author(s):  
Tawna C. Morgan ◽  
Christine A. Bishop ◽  
Tony D. Williams
Keyword(s):  
Water Policy ◽  
2019 ◽  
Vol 21 (5) ◽  
pp. 1065-1080 ◽  
Author(s):  
Sarah Praskievicz

Abstract Water resources in humid regions are perceived as abundant, and water-governance systems are based on the expectation of consistent availability of water to meet all needs. In arid regions, in contrast, the operating assumption is that water is a scarce resource that must be allocated systematically to avoid conflict. The ‘myth of abundance’ common in humid regions is counterproductive to effective water governance. This paper provides an overview of the concepts of water scarcity and water security and explains how water governance in humid regions fits into these frameworks. It then addresses the riparian system for allocating water rights and how this system promotes the myth of abundance. Three case studies are presented from humid regions of the Anglophone world, highlighting the shortcomings of abundance-based water-governance systems in these regions. Finally, the water-security framework is advocated as an alternative that addresses fundamental flaws of the abundance-based approach, namely issues related to ecosystems, water quality, disasters, and conflict. Using a goal of water security, rather than a perception of abundance, as the basis for water governance will lead to improved outcomes, especially given future climate change and population growth.


1998 ◽  
Vol 12 (4) ◽  
pp. 527-542 ◽  
Author(s):  
Helene E. Unland ◽  
Altaf M. Arain ◽  
Chawn Harlow ◽  
Paul R. Houser ◽  
Jaime Garatuza-Payan ◽  
...  

2003 ◽  
Vol 39 (3) ◽  
pp. 582-587 ◽  
Author(s):  
Mary C. Garvin ◽  
Jesse P. Basbaum ◽  
Rebecca M. Ducore ◽  
Kristen E. Bell
Keyword(s):  

2009 ◽  
Vol 123 (4) ◽  
pp. 313 ◽  
Author(s):  
Michael T. Jones ◽  
Paul R. Sievert

The homing ability of non-marine turtles has been studied in a variety of taxa, and many species appear to be capable of short-range homing on the scale of several hundred meters or a few kilometers following experimental displacement. However, the behavioral response of turtles following a naturally caused displacement has seldom been reported. In this paper, we describe the effect of displacement ranging from 1.4 to 16.8 km (average = 4.8 km) by severe floods in a stream system in Massachusetts. We radio-tracked 38 adult Wood Turtles (Glyptemys insculpta) at five separate sites in Franklin County, Massachusetts, for periods ranging from one to four activity seasons and documented the displacement of a total of 12 Wood Turtles during seven floods between 2004 and 2008. Based on the average rate of displacement per flood and annual flood frequency, we estimate that, during our study, floods displaced over 40% of this Wood Turtle subpopulation annually. We present evidence that displacement results in elevated mortality rates and that displaced Wood Turtles mate and nest in the year following displacement at rates well below average; on a longer time scale, however, displacement by flooding may be an important mechanism of population connectivity in some areas. We also present evidence that most Wood Turtles avoid stream segments with stream gradient steeper than 1%; this may in part reflect an adaptation to avoid severe floods. Regional models and empirical data from stream gages suggest that flood intensity may currently be on an increasing trend. Conversion of upland from forest and fields to impervious surfaces and hardening of upstream riverbanks may have exacerbated recent flooding and decreased the resiliency of the riparian system to increased precipitation.


2011 ◽  
Vol 37 (4) ◽  
pp. 329-339 ◽  
Author(s):  
Clara L. Shaw ◽  
Jordan E. Rutter ◽  
Amy L. Austin ◽  
Mary C. Garvin ◽  
Rebecca J. Whelan

2019 ◽  
Author(s):  
Jeffrey J. Richardson ◽  
Christian E. Torgersen ◽  
L. Monika Moskal

Abstract. Methods to quantify solar insolation in riparian landscapes are needed due to the importance of stream temperature to aquatic biota. We have tested two approaches developed for other applications of estimating solar insolation from airborne lidar using field data collected in a heavily forested narrow stream in western Oregon, USA. We show that a raster methodology based on the light penetration index (LPI) and a synthetic hemispherical photograph approach both accurately predict solar insolation, explaining more than 73 % or the variability observed in pyranometers placed in the stream channel. We apply the LPI based model to predict solar insolation for an entire riparian system, and demonstrate that no field-based calibration is necessary to produce unbiased prediction of solar insolation using airborne lidar alone.


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