Summaries
-A summary of the results is presented below. This includes summaries -by country and major basin.
+A summary of the map results is presented below. This includes +summaries by country and major basin. Results include the size and +extent of likely population changes. The column “population change” is +the difference in the number of adult females after 3 generations (42 +years). This is consistent with the population sze reduction criteria +used by the IUCN Red List. The column “River length Endangered”, is the +proportion of river length where populations declined by 50% or more, +and represents the spatial extent of future changes.
Summary by country.
@@ -121,16 +127,10 @@Summary by country.
-Endangered (prop)
+River length Endangered (prop)
-river length (km)
-
-
-length End.
-
-
-length not End.
+River length (km)
@@ -141,18 +141,12 @@ Summary by country.
-0.576
-
+
0.70
-
+
22217
-
-15516
-
-
-6701
-
@@ -161,18 +155,12 @@ Summary by country.
-0.626
-
+
0.74
-
+
190555
-
-141183
-
-
-49372
-
@@ -181,18 +169,12 @@ Summary by country.
-0.483
-
+
0.63
-
+
38552
-
-24122
-
-
-14430
-
@@ -201,18 +183,12 @@ Summary by country.
-0.781
-
+
0.85
-
+
8302
-
-7066
-
-
-1236
-
@@ -221,18 +197,12 @@ Summary by country.
-0.480
-
+
0.63
-
+
3298
-
-2082
-
-
-1216
-
@@ -241,18 +211,12 @@ Summary by country.
-0.249
-
+
0.45
-
+
7372
-
-3311
-
-
-4061
-
@@ -261,18 +225,12 @@ Summary by country.
-0.684
-
+
0.78
-
+
47363
-
-36750
-
-
-10613
-
@@ -281,18 +239,12 @@ Summary by country.
-0.261
-
+
0.46
-
+
5756
-
-2643
-
-
-3113
-
@@ -301,18 +253,12 @@ Summary by country.
-0.383
-
+
0.56
-
+
30022
-
-16714
-
-
-13308
-
@@ -320,17 +266,11 @@ Summary by country.
-
+
-
+
353437
-
-249387
-
-
-104050
-
@@ -338,76 +278,18 @@ Summary by country.
Summary by basin.
-Using results from updated Norris et. al. 2019.
-
Summary by country. -0.626
Summary by country. -0.483
Summary by country. -0.781
Summary by country. -0.480
Summary by country. -0.249
Summary by country. -0.684
Summary by country. -0.261
Summary by country. -0.383
Summary by country.
Summary by basin.
-Using results from updated Norris et. al. 2019.
-| Basin | -Population change | -Endangered (prop) | -river length (km) | -length End. | -length not End. | -
|---|---|---|---|---|---|
| Amazon | --0.673 | -0.77 | -170905 | -131958 | -38947 | -
| Coastal North | --0.549 | -0.68 | -12700 | -8626 | -4074 | -
| Coastal South | --0.976 | -1.00 | -5711 | -5711 | -0 | -
| Orinoco | --0.588 | -0.70 | -26533 | -18677 | -7856 | -
Same using Free-flowing rivers data.
-| Basin | population change | -Endangered (prop) | -river length (km) | -length End. | -length not End. | +River length Endangered (prop) | +River length (km) |
|---|---|---|---|---|---|---|---|
| 0.72 | 280121 | -202508 | -77613 | ||||
| Coastal North | -0.339 | 0.52 | 20835 | -10879 | -9956 | ||
| Coastal South | -0.973 | 1.00 | 6467 | -6467 | -0 | ||
| Orinoco | -0.501 | 0.64 | 46014 | -29533 | -16481 |
Summary by basin.
Summary by major basins and countries.
-
| -Basin - | --Country - | --Population change - | --Endangered (prop) - | --river length (km) - | --length End. - | --length not End. - | -
|---|---|---|---|---|---|---|
| -Amazon - | --Bolivia - | ---0.859 - | --0.91 - | --18739 - | --17098 - | --1641 - | -
| -Amazon - | --Brazil - | ---0.627 - | --0.74 - | --116106 - | --85750 - | --30356 - | -
| -Amazon - | --Colombia - | ---0.376 - | --0.54 - | --7769 - | --4229 - | --3540 - | -
| -Amazon - | --Ecuador - | ---0.917 - | --0.95 - | --3330 - | --3176 - | --154 - | -
| -Amazon - | --Guyana - | ---0.973 - | --1.00 - | --299 - | --299 - | --0 - | -
| -Amazon - | --Peru - | ---0.861 - | --0.91 - | --23447 - | --21304 - | --2143 - | -
| -Amazon - | --Venezuela - | --0.240 - | --0.08 - | --1215 - | --102 - | --1113 - | -
| -Coastal North - | --Brazil - | ---0.643 - | --0.76 - | --1681 - | --1279 - | --402 - | -
| -Coastal North - | --French Guiana - | ---0.644 - | --0.76 - | --1833 - | --1390 - | --443 - | -
| -Coastal North - | --Guyana - | ---0.555 - | --0.68 - | --4376 - | --2973 - | --1403 - | -
| -Coastal North - | --Suriname - | ---0.367 - | --0.54 - | --3908 - | --2103 - | --1805 - | -
| -Coastal North - | --Venezuela - | ---0.931 - | --0.98 - | --902 - | --881 - | --21 - | -
| -Coastal South - | --Brazil - | ---0.976 - | --1.00 - | --5711 - | --5711 - | --0 - | -
| -Orinoco - | --Colombia - | ---0.564 - | --0.69 - | --10268 - | --7037 - | --3231 - | -
| -Orinoco - | --Venezuela - | ---0.603 - | --0.72 - | --16265 - | --11640 - | --4625 - | -
Same with Free-flowing rivers…..plot results
# Make summaries
@@ -849,8 +351,6 @@ Summary by major basins and coun
#> `.groups` argument.
tab_sum$bc <- factor(paste(tab_sum$BASIN_NAME, tab_sum$COUNTRY, sep = "\n"))
# levels(tab_sum$bc)
Table showing data values used in graph.
@@ -863,7 +363,7 @@ Summary by major basins and coun population change |
-Endangered (prop) +River length Endangered (prop) |
river length (km)
@@ -1127,14 +627,17 @@ Summary by major basins and coun |
|---|
The table values can also be presented graphically. This enables a
+more comprehensive understanding of the patterns.
+
Next steps
-
-
- Update using points from Free Flowing Rivers
https://www.worldwildlife.org/pages/free-flowing-rivers -
+ - Consultate with researchers to check and validate the mapped +results.