Shhhhh! (Part 1 of 2)
From the People, Planet, Profits & Projects Blog
by Richard Maltzman,
Dave Shirley
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Dave Shirley
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Date
Here’s a story about protecting ocean life that – in a twist – does not involve acidification, plastic, chemical pollution, melting ice, or climate change. Those things are still all threats to ocean life, of course, but this post, which has some intriguing connections to project management, is about noise.
It started with a very interesting article from Nature, called The Quest for Quieter Seas, which is published online here.
The connections to project management have to do with:
- Obtaining a solid baseline
- Working with facts
- Synergy
- Cause/Effect
- Linking a project to an enterprise’s mission statement
- The Pareto Principle
…see if you can find these connections here.
Who’s making all of that noise?
First, let’s start with the sources of noise in our oceans. Of course, some if it is quite natural and has always been around; things like dolphin whistles and clicks, whales’ songs, rainfall, snapping shrimp, and the rumbling of an undersea earthquake.
But some of the noise is most definitely anthropogenic (caused by humans), such as sonar, oil drilling rigs, vehicles (everything from frigates and supertankers to submarines), hydrographic mapping sensors, and seismic air-gun arrays.
See the chart below to place these in volume level and against the hearing frequency ranges of various forms of ocean life.
(From Nature, Volume 568, 11-April-2019)
The article expresses the need for a baseline so well, I’ll let it speak for itself:
Because noise is so pervasive, it is hard to study the impact as it ramps up. It isn’t clear whether marine systems can work around or adapt to it – or whether it will drive crashes in already-stressed populations. So researchers are becoming acoustic prospectors, searching for quite zones and noisy habitats in efforts to chronicle what exactly happens when sound levels change. Efforts (projects) range from natural experiments on the effects of a plan to reroute shipping lanes in the Baltic Sea, to investigate the impact of a trial scheme in Canada to reduce ship speed in coastal waters off Vancouver.
Complicating matters is the fact that there are other new and concurrent stressors on marine life, such as the aforementioned acidification and warming ocean temperatures. The effects are not simply arithmetically added, though. A plus B is not a simple equation. The interactions are often causing a negative effect greater than the sum of its parts – also known as synergy.
So how much are we adding to the not-so-silent seas, in terms of noise? Based on the amount of noise contributed by an average ship and looking at the number of ships (this does not include sonar and other items mentioned above) the sound contribution has risen about 3 dB per decade. If you know your decibels, you know this is a logarithmic increase – a doubling of sound levels each decade.
Seismic air blasts, used to map the sea floor for possible oil or gas drilling opportunities, can be audible for hundreds of kilometers (think Boston to New York or Amsterdam to Dusseldorf).
These are causes. What are the effects?
It’s beginning to become obvious that loud marine noises can cause a panic dive in cetaceans (whales, dolphins, porpoises), as indicated by the increase in ‘beaching’. These panic dives have the secondary effect of causing hemorrhages in the animals’ brains and hearts. Research projects have also shown that loud waterborne noises can damage the ears and cause hearing loss (as you may expect).
In part II I’ll discuss more about the effects and the research and other projects that are being implemented to remedy ocean noise and make the oceans a little quieter. As you can tell from the above, this is not a simple ‘quality of life’ issue – it’s life itself.
Posted
by
Richard Maltzman
on: April 15, 2019 10:50 PM |
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Comments (3)
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Vincent Guerard
Coach - Trainer - Speaker - Advisor| Freelance
Mont-Royal, Quebec, Canada
Richard,
Very interesting information.
I could make a parallel with construction work. Who would we like to have a project next door that start and stop at any time of the day? We need to respect our surroundings in all kind of projects.
Hi Richard, very interesting read, especially when most of our conversations are centered around projects. Will be looking forward for the 2nd part.
Alfred Horton
CEO & President| AOC Connect, LLC
Lovettsville, Va, United States
Thank you for this. I remember an article some years ago about whales that were beaching themselves whenever a new low-frequency sonar was turned on at a naval base. Noise and light pollution is often forgotten in general, and I must admit that I have never given thought before this to underwater noise pollution.
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