By Stephan Gollasch
Maritime canals dissolve traditional obstacles to the dispersal of marine organisms, therefore offering them with many possibilities for ordinary dispersal, in addition to for shipping-mediated delivery. The creation of alien species proved to be essentially the most profound and destructive anthropogenic deeds - regarding either ecological and fiscal expenses. This publication is the 1st to match the affects of the 3 crucial maritime canals Kiel, Panama, Suez as invasion hall for alien biota. the 3 fluctuate of their geographic destinations, hydrological regimes, and of their permeability to alien biota.
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Extra resources for Bridging Divides
11. Construction work on the canal locks in Kiel-Holtenau in September 1893. Photo courtesy of Walter Schulz, Brunsbüttel, Germany (Schulz 1995). 12. Construction work on the canal locks in Brunsbüttel in May 1893. Photo courtesy of Walter Schulz, Brunsbüttel, Germany (Schulz 1995). The building of the canal was a challenge because of intersecting rivers, ground water influence and a topography ranging from 25 m above sea level, to 3 m below sea level en route (Fig. 13). Due to careful planning, locks were only required at both ends of the canal.
Htm May 27th 2004). The biggest ship ever passed through the canal was the German naval vessel Bismarck. She transited on March 9th 1941. 9 m – exceeding today’s vessel size limits for passage (see above). org July 16th 2004). 000 0 0 95 00 05 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 00 18 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 20 Year Fig. 26. e. merchant ships, navy vessels and others, passing annually through the Kiel Canal since 1895 (canal opening) to 2004.
This signals either active spawning, or passive drift of larvae with the water masses through the locks, accompanied by a good survival potential. Figure 32 depicts the relative abundance of fish species in the Canal in 1995, but this is certainly nothing but a “snapshot” description for this particular year (Kafemann et al. 1998). Comparing earlier studies with the one performed later by Kafemann (2000) demonstrated that both the frequency and biomass of a species per unit area fluctuates seasonally and between years.
Bridging Divides by Stephan Gollasch