. The ecology of delta marshes of coastal Louisiana : a community profile. Marsh ecology -- Louisiana; Wetlands -- Louisiana. Table 32. Estimates of the economic value of Louisiana's coastal wetlands comparing willingness-to-pay approaches with energy analysis approaches (Costanza 1983). Approach Shadow Refer- value* ence oriented (Table 33). I will discuss briefly each major issue or problem, bringing in the role of the various human activities as they apply. Since habitat loss (marsh loss) is by far the most pressing problem,it will receive the major emphasis. 1979 $/acre/yr) Willingness-to-
. The ecology of delta marshes of coastal Louisiana : a community profile. Marsh ecology -- Louisiana; Wetlands -- Louisiana. Table 32. Estimates of the economic value of Louisiana's coastal wetlands comparing willingness-to-pay approaches with energy analysis approaches (Costanza 1983). Approach Shadow Refer- value* ence oriented (Table 33). I will discuss briefly each major issue or problem, bringing in the role of the various human activities as they apply. Since habitat loss (marsh loss) is by far the most pressing problem,it will receive the major emphasis. 1979 $/acre/yr) Willingness-to-pay approaches Consumer surplus Gross benefits Average of gross benefits Net benefits Replacement value Energy Analysis approaches Biological productivity 25 3 155 241 352 544 231 342 237 ,662 ,120 7,374 300 d b d Marsh Loss and Salt Intrusion As discussed in Chapter 1 (Figure 23), the rate of marsh loss to open water has been accelerating over the past 50 years to the present rate of about percent of the delta marshes being lost annually. Although the circumstances leading to this loss are complex and involve natural processes beyond human control , there is good evidence that a significant part of the problem is a result of human modification of the Mississippi River and the deltaic plain. This discussion will be limited to these latter factors, that is, those which man can hope to manage on a regional scale. *Price that would prevail in a perfect market. References: a - Humphrey et al. b - Gosselink et al c - Vora 1974 d - Costanza 1983 1978 1974 structures involved. One compromise has been suggested by Lichfield et al. (1975), who used a planning balance sheet to list the major commodities exchanged and to identify the recipients of the cost and the benefits. This procedure ensures that the important factors in the benefit:cost analysis are explicitly recognized rather than being lumped into a single dollar value. WETLAND MANAGEMENT In the Mississippi River Deltaic Plai
Size: 3212px × 778px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbio, booksubjectwetlandslouisiana
