Friday, October 26, 2018

Weekly Science Roundup: 10/26/2018










A running list of action on plastic pollution National Geographic, 10/19/2018







A 14-year-long oil spill in the Gulf of Mexico verges on becoming one of the worst in U.S. history The Washington post, 10/21/2018


Using Markets to Manage Climate Change? The Wall Street Journal, 10/21/2018











How Recycled Plastic Bottles Are Building Homes Great Big Story on Youtube, 10/22/2018









Cities are planning for climate change all wrong The Washington Post, 10/22/2018

Cheers! Solar farm cider powers up Treehugger, 10/23/2018
















Wednesday, October 24, 2018

Personal Decisions to Combat Climate Change

A few weeks ago, the IPCC report on climate change was released. And there were a slew of articles about the personal decisions an individual can make to combat climate change. 

CNN says the 5 things you can do about climate change are make small changes at home (LED bulbs, turning off the lights, changing thermostats to be more eco-friendly, use less water), recycle at the office, use public transportation, get informed, and get involved. 

Sure, you definitely SHOULD use energy efficient appliances/bulbs, turn off the lights and water when not in use, and all of that. I definitely agree that everyone should do the list of things that CNN has laid out. 

In the same vein, Forbes recommends that you should campaign/protest/lobby/vote, change your commute to be more eco-friendly (hybrid cars, public transit, carpool, biking), build better and utilize green infrastructure, use less energy and invest in solar, use the 5 Rs (refuse, reduce, repair, reuse, recycle), and eat less meat and focus on locally sourced food. 

I also agree with these. 

However, all of those things are only drops in the bucket. They are helpful, yes, and you SHOULD do them. 

But there's bigger picture steps that you can take, as an individual. 

  1. VOTE VOTE VOTE. You can check to see how much money various industries give to politicians and use that information to vote wisely. For example, Ted Cruz (R-TX) received the most oil & gas money in 2018. https://www.opensecrets.org/
  2. VOTE VOTE VOTE 2.0. Vote for politicians who are environmentally minded. Who are pro-green new deal. Who have the environment's best interests at the forefront, not those who are pawns for polluting industries. 
  3. You can invest your money with Swell Investing which uses UN Sustainable Development Goals to pick the mixture of companies for various impact areas - like climate action, clean water, etc. You can make a change by voting with your dollars. Put your money where your brain is, so to speak.
  4. Buy from companies with sustainable practices, or to not support companies you disagree with. The movement is called voting with your wallet, and you have many options to learn more about that. Boycotts can be effective to make companies change their ways. I also talked more about this with clothing in a previous post
  5. Donate money to organizations doing the good work. Non-profits like The Nature Conservany, The Ocean Conservancy, Sea Legacy, and the like are all doing their part. 
  6. Rethink your daily actions. Consider the impact of your habits. For example, if I buy a single use bottle of soft drink every day, I'm generating 7 pieces of plastic that are recyclable but avoidable. I could use aluminum cans instead. Or buy a 2-liter larger bottle and drink from a reusable cup everyday. I could eliminate the soft drinks all together and opt for water, tea, etc in reusable cups. The same idea could work for the daily coffee on the go (use a reusable cup), lunches, etc. Just rethink your habit and find creative ingenious solutions to be more eco-friendly!
  7. VOTE!

If everyone makes the small changes AND votes wisely

Friday, October 19, 2018

Weekly Science Roundup: 10/19/2018

10/10/2018




Trump blames wildfires on California forest policy and threatens to withhold funds from state LA Times, 10/17/2018

Great Lakes Pipeline Dispute Highlights a Broader Energy Dilemma EcoWatch, 10/17/2018










Microplastics found in 90 percent of table salt National Geographic, 10/17/2018



Israel's SodaStream sucks up ocean plastic in Honduras cleanup World Israel News, 10/17/2018


Researchers use ultrasound to learn more about Ningaloo's pregnant green sea turtles ABC Australia, 10/17/2018




Extreme Botany: The Precarious Science of Endangered Rare Plants Yale Environment 360, 10/18/2018


















Tuesday, October 16, 2018

Cypress Logging in Louisiana

I have spent many many hours deep in the swamps of Louisiana. Most of the swamps I've seen have been modified by humans in one or more ways - cypress logging, building levees, digging canals, adding water control structures, and impounding and/or draining. There's virtually no remaining intact swamp. 

The most dramatic of those on a large scale in my opinion is the widespread cypress logging that took place across the coastal swamps of Louisiana and the rest of the Gulf coast. 

People have been logging baldcypress (Taxodium distichum) in Louisiana swamps since the 1700s, but it wasn't until the 1890s that people had the machines to log with any efficiency. Cypress lumber is valuable because it's rot resistant, strong, with a tight grain. It does make for beautiful boards. It also makes beautiful trees. 

Around that time, people developed the pull-boat, which was basically the downfall of cypress stands that were present in those days. The pull-boat allowed trees to be logged much more quickly than before. Intense logging occurred with that mechanical invention, and most virgin (never logged) cypress were logged from 1890-1925. By the 1930s, most cypress mills were going out of business and logging was dwindling... because nothing of worth was left to cut down. Any big trees left standing at that point were hollow and therefore useless to the logger, or otherwise damaged.

To log cypress, workers would visit the sites in the winter, when water levels were lower, and girdle the trees. Girdling is when the bark around the tree is removed, which will ultimately kill the tree [source]. Then, in the spring during high water, loggers would come back, cut the tree down, and then be able to float or pull the logs out of the swamp. To cut the trees down, loggers created notches in the trees that they inserted boards into - called springboards - that they could stand on while cutting the tree down [source].

Loggers effectively clearcut cypress trees from large tracts of land in south Louisiana. I've read descriptions of Manchac, LA (between the Lakes Maurepas and Pontchartrain) that described huge cypress trees as far as the eye can see. Now, there are patches of cypress trees in that area but not nearly what used to be. The marsh is beautiful, but if you look carefully you can tell that something traumatic happened. There are still some sparse standing trees, with marsh underneath and around, but many standing cypress stumps and small canals criss-crossing the remaining marsh. 

There's many remnants of the effects of cypress logging still visible today. Here's a few:

While you can't see the pattern from the ground, the area is dissected with pull-boat canals. You can see all the straight, unnatural lines that run to one central point. Those are pull-boat canals where the logs were pulled out of the swamp. This is but one example of many that are visible on current aerial photography available to the public.


On the ground in Pearl River, I found an old stump that was girdled. This tree was cut down ~100 years ago, yet this stump still remains. This further proves the point that cypress wood is very very long lasting. Photo by me.

On the Tickfaw River, an old stump that has springboard notches visible. The notches are where loggers inserted the ends of boards (called springboards because they bounced) into the tree to stand on while they cut the tree down. It's hard to picture 100 years ago at this site, before it was logged, or picturing loggers work to cut this tree down. Photo by me. 


In Hope Canal, the remains of a former logging railroad can be seen. The railroad was built in the 1890s, and used to move logs out of the swamp. It wasn't until the 1930s that the actual canal was dug to divert water to Lake Maurepas. Photo by me.


In Manchac, you can see cypress dot the horizon. It's surely not the dense stands it once was. Photo by me.

These are only a few examples of the remnant hints of the cypress logging that took place. I see these scars all the time and they remind me of what used to be, but will never be again (probably). 

The hydrology of coastal Louisiana was relatively unaltered by humans in the early 20th century, so forests that were harvested had the opportunity to regrow. Baldcypress seeds need saturated soils but not flooded soils to germinate. Swamps are naturally seasonally flooded, with a portion of the year not flooded which allows seeds to germinate into seedlings. Once seedlings are established they can tolerate the natural flooding regime. 

But by the end of the 1930s, the hydrology was dramatically shifted and shifting. 

Since then, we've contained the Mississippi River in a prison of levees, and built a few diversion projects to semi-mimic natural floodwater dispersion into wetlands, cut off natural bayous that were river distributaries, extensively dug canals for flood relief, created two flood relief spillways, built interstates/roads over/through the swamps, and dug many many oil and gas exploration canals. I could write pages on all the changes that have happened in the last 100 years so I'll save that for a follow up post. 

The point is that the coast is not even remotely the same. 

Cypress that regenerated 100 years ago would not be able to do the same in 2018. The hydrology is massively different and seedlings to not seasonally get the non-flooded conditions necessary for adequate growth. Additionally wetlands (swamps included) provide valuable ecosystem services which cannot be easily replicated by humans, nor should they be when the original system is right in front of you. 

In the current situation, cypress swamps are semi-stable in my experience. Reconnecting the hydrology would be incredibly beneficial, planting older more tolerant seedlings in marshes is helpful, killing any and all nutria that eat the young trees would be amazing, and those are just the first 3 things I can think of. 

The take home message is that even though the hydrology is all messed up, the ecosystem is not properly functioning, and there are many environmental and political hurdles - love the swamp. The swamp is beautiful, it's wonderful, it's home to many beautiful species, and it's iconic. It is not to be feared, drained, destroyed, or logged. 

Additional Information:

1800s-era sunken logs are now treasure; here are the men who find them LA Times, 7/13/2014

Video of Louisiana Cypress Logging, 1920s YouTube user foresthistory, 2/3/2009

Sinker cypress: treasures of a lost landscape Christopher Aubrey Hurst, LSU thesis, 2005. 
>> start at page 29 for a history of cypress in Louisiana

Great Mississippi Flood of 1927 Wikipedia, accessed 10/16/2018

Flood Control Act of 1928 Wikipedia, accessed 10/16/2018

Caernarvon, Louisiana Wikipedia, accessed 10/16/2018

History of Levees FEMA, accessed 10/16/2018

Friday, October 12, 2018

Weekly Science Roundup: 10/12/2018


Arctic Sea Ice Minimum NASA, accessed 10/12/2018




HOW MUSHROOMS MIGHT SAVE THE BEES Newsweek, 10/7/2018








What climate change is actually expected to do The Washington Post, 10/8/2018


















With Thick Ice Gone, Arctic Sea Ice Changes More Slowly NASA Jet Propulsion Laboratory, 10/11/2018