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Re: Our trees are dying - Global Warming in Jersey City
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I am no scientist nor arborist nor mycologist for that matter. Simply an observation.

But I will entertain everyone's scientific expertise.

Quote:

135jc wrote:
This is not some phenomenon. We have had no rain until this week.




quote]
dcourts1984 wrote:
I was sitting in Bryant Park last week and noticed same thing. Brown leaves everywhere. Strange.
[/quote]

Posted on: 2016/8/2 11:19
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Re: Our trees are dying - Global Warming in Jersey City
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Quote:

kencares wrote:
It's not about one thing killing a tree. It's about multiple stressors combining to weaken and kill over time.

Take a look at the dead and dying trees all around you. This is a symptom of global warming.
You're talking about two separate issues. MDM is correct that the leaf fall you see throughout the tri-state is caused by Anthracnose, which affects mostly London Plane trees. Starting around 6 years ago, we began to have two leaf cycles from these trees. The fungus would kill the leaf in July, the tree would reset, and again drop in the fall. This fungus does not kill the host but sure makes a lot of extra work for us. On an individual tree you can treat the disease by using a fungicide, but in a park with multiple 70' species, it's not practical.

The dead and dying trees are a result of improper care for newly planted street trees, with the added factor of a hot and dry summer. This issue is something that has on-going discussions with Public Works, aiming for a resolution.

As far as global warming, we have started to plant trees that will be better adapted to changing temperatures zones. Much of what we plant in Van Vorst Park that use to be annuals, are now becoming perennials.

parkman

Posted on: 2016/8/2 1:34
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Re: Our trees are dying - Global Warming in Jersey City
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It's not about one thing killing a tree. It's about multiple stressors combining to weaken and kill over time.

Take a look at the dead and dying trees all around you. This is a symptom of global warming.

Posted on: 2016/8/2 0:38
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Re: Our trees are dying - Global Warming in Jersey City
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Quote:

Our average high temperatures are in that 75-85 degree window for three (almost four) months of the year. If, over time, that becomes four or five months, looks like this fungus would have more time to do its work.


For the heck of it, I went ahead and plotted temperature data for a station near JC for 2006 thru 2015. The data is posted online by NYSERDA

Heating Degree Days (HDD) = The higher the number, the colder the year (the more you had to run your heat)

Cooling Degree Days (CDD) = The lower the number, the cooler the summer (you run your A/C less)

I applied linear trend lines to both data sets. The trends is slightly cooler winters and a very slight cooling trend during the summer.



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Posted on: 2016/8/1 21:06
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Re: Our trees are dying - Global Warming in Jersey City
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This is not some phenomenon. We have had no rain until this week.




quote]
dcourts1984 wrote:
I was sitting in Bryant Park last week and noticed same thing. Brown leaves everywhere. Strange.[/quote]

Posted on: 2016/8/1 20:31
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Re: Our trees are dying - Global Warming in Jersey City
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Overall, this summer has been rather dry in terms of rain. That would affect the trees.

Posted on: 2016/8/1 20:19
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Re: Our trees are dying - Global Warming in Jersey City
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Quote:

kencares wrote:
Warm winters don't kill the fungus and many of the other pests killing our trees.

Learn science.


Cold winters don't kill fungi spores, the cold actually preserves them. The enemy of fungi is desiccation (being dried out). The article linked was about a Anthracnose type fungi attacking the trees (is isn't fatal to a healthy tree).

I am familiar with it. My tomatoes get attacked by it in late summer / early fall when the morning become cooler and damp. The fungi doesn't do much when it is hot and dry.

Posted on: 2016/8/1 20:16
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Re: Our trees are dying - Global Warming in Jersey City
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Global warming is serious but people will take it less seriously if we cry wolf about situations that don't apply.

Posted on: 2016/8/1 20:13
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Re: Our trees are dying - Global Warming in Jersey City
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The fungal disease overwinters in and on seeds, soil and garden debris. Cool wet weather promotes its development, and the optimum temperature for continued growth of the spores is between 75-85 degrees F. Moisture is required for development and germination of the fungus as well as for infection of the plant.

http://www.planetnatural.com/pest-pro ... lant-disease/anthracnose/

Our average high temperatures are in that 75-85 degree window for three (almost four) months of the year. If, over time, that becomes four or five months, looks like this fungus would have more time to do its work.

http://www.usclimatedata.com/climate/ ... ey/united-states/usnj0234

Posted on: 2016/8/1 20:07
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Re: Our trees are dying - Global Warming in Jersey City
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Warm winters don't kill the fungus and many of the other pests killing our trees.

Learn science.

Posted on: 2016/8/1 19:44
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Re: Our trees are dying - Global Warming in Jersey City
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Oh good grief...

Anthracnose (fungus) infections on trees thrive during cool weather. Warm weather retards the growth of the fungus.

Is there anything left in the world not blamed on global warming, climate-change, climate-disruption?

A comprehensive list of things caused by global warming

Posted on: 2016/8/1 19:37
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Re: Our trees are dying - Global Warming in Jersey City
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I was sitting in Bryant Park last week and noticed same thing. Brown leaves everywhere. Strange.

Posted on: 2016/8/1 19:18
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Re: Our trees are dying - Global Warming in Jersey City
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Quote:

kencares wrote:
See all those dead leaves on the ground? That's not supposed to happen at this time of year. There's a number of things killing our trees, but they're all exacerbated by global warming.

http://gothamist.com/2016/08/01/fungus_among_us.php

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I've noticed the dead leaves and wondered wtf was going on. This isn't good.

Posted on: 2016/8/1 18:52
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Our trees are dying - Global Warming in Jersey City
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See all those dead leaves on the ground? That's not supposed to happen at this time of year. There's a number of things killing our trees, but they're all exacerbated by global warming.

http://gothamist.com/2016/08/01/fungus_among_us.php

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Posted on: 2016/8/1 18:33
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