Environmental Engineering Reference
In-Depth Information
(a)
(b)
(c)
(d)
Branchinecta
conservatio
Branchinecta
longlantenna
Branchinecta
mesovallensis
Fmax (days)
0-35
Fmax
Fmax
7%
33%
36-75
76-122
123
1%
1.0%
Plate 11.14 (Fig. 11.14 on page 310) (a) Distribution of biological reserves (black shading) in the Central Valley region of
California, USA (inset). The current set of protected areas only includes a small proportion of locations where vernal pools
are found. Thus, temporary pond dwellers, such as fairy shrimps ( Branchinecta spp.), are at risk. (b) The current distribu-
tion of F max - the annual average number of days of continuous inundation of ponds . F max is a key factor determining the
success of fairy shrimps. The current ranges of three fairy shrimp species are shown in outline. (c) Predicted changes to
F max under a cooler and drier scenario (
1°C,
10% precipitation). (d) Predicted changes to F max under a warmer and wetter
scenario (
30% precipitation). The manager's objective will be to maintain shrimp biodiversity by adding new
protected areas that incorporate the necessary future range of F max values. (From Pyke, 2005.)
+
3°C,
+
 
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